Index: frontend/node_modules/sucrase/LICENSE =================================================================== --- frontend/node_modules/sucrase/LICENSE (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/LICENSE (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,21 @@ +The MIT License (MIT) + +Copyright (c) 2012-2018 various contributors (see AUTHORS) + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. Index: frontend/node_modules/sucrase/README.md =================================================================== --- frontend/node_modules/sucrase/README.md (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/README.md (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,295 @@ +# Sucrase + +[![Build Status](https://github.com/alangpierce/sucrase/workflows/All%20tests/badge.svg)](https://github.com/alangpierce/sucrase/actions) +[![npm version](https://img.shields.io/npm/v/sucrase.svg)](https://www.npmjs.com/package/sucrase) +[![Install Size](https://packagephobia.now.sh/badge?p=sucrase)](https://packagephobia.now.sh/result?p=sucrase) +[![MIT License](https://img.shields.io/npm/l/express.svg?maxAge=2592000)](LICENSE) +[![Join the chat at https://gitter.im/sucrasejs](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/sucrasejs/Lobby) + +## [Try it out](https://sucrase.io) + +## Quick usage + +```bash +yarn add --dev sucrase # Or npm install --save-dev sucrase +node -r sucrase/register main.ts +``` + +Using the [ts-node](https://github.com/TypeStrong/ts-node) integration: + +```bash +yarn add --dev sucrase ts-node typescript +./node_modules/.bin/ts-node --transpiler sucrase/ts-node-plugin main.ts +``` + +## Project overview + +Sucrase is an alternative to Babel that allows super-fast development builds. +Instead of compiling a large range of JS features to be able to work in Internet +Explorer, Sucrase assumes that you're developing with a recent browser or recent +Node.js version, so it focuses on compiling non-standard language extensions: +JSX, TypeScript, and Flow. Because of this smaller scope, Sucrase can get away +with an architecture that is much more performant but less extensible and +maintainable. Sucrase's parser is forked from Babel's parser (so Sucrase is +indebted to Babel and wouldn't be possible without it) and trims it down to a +focused subset of what Babel solves. If it fits your use case, hopefully Sucrase +can speed up your development experience! + +**Sucrase has been extensively tested.** It can successfully build +the [Benchling](https://benchling.com/) frontend code, +[Babel](https://github.com/babel/babel), +[React](https://github.com/facebook/react), +[TSLint](https://github.com/palantir/tslint), +[Apollo client](https://github.com/apollographql/apollo-client), and +[decaffeinate](https://github.com/decaffeinate/decaffeinate) +with all tests passing, about 1 million lines of code total. + +**Sucrase is about 20x faster than Babel.** Here's one measurement of how +Sucrase compares with other tools when compiling the Jest codebase 3 times, +about 360k lines of code total: + +```text + Time Speed +Sucrase 0.57 seconds 636975 lines per second +swc 1.19 seconds 304526 lines per second +esbuild 1.45 seconds 248692 lines per second +TypeScript 8.98 seconds 40240 lines per second +Babel 9.18 seconds 39366 lines per second +``` + +Details: Measured on July 2022. Tools run in single-threaded mode without warm-up. See the +[benchmark code](https://github.com/alangpierce/sucrase/blob/main/benchmark/benchmark.ts) +for methodology and caveats. + +## Transforms + +The main configuration option in Sucrase is an array of transform names. These +transforms are available: + +* **jsx**: Enables JSX syntax. By default, JSX is transformed to `React.createClass`, + but may be preserved or transformed to `_jsx()` by setting the `jsxRuntime` option. + Also adds `createReactClass` display names and JSX context information. +* **typescript**: Compiles TypeScript code to JavaScript, removing type + annotations and handling features like enums. Does not check types. Sucrase + transforms each file independently, so you should enable the `isolatedModules` + TypeScript flag so that the typechecker will disallow the few features like + `const enum`s that need cross-file compilation. The Sucrase option `keepUnusedImports` + can be used to disable all automatic removal of imports and exports, analogous to TS + `verbatimModuleSyntax`. +* **flow**: Removes Flow type annotations. Does not check types. +* **imports**: Transforms ES Modules (`import`/`export`) to CommonJS + (`require`/`module.exports`) using the same approach as Babel and TypeScript + with `--esModuleInterop`. If `preserveDynamicImport` is specified in the Sucrase + options, then dynamic `import` expressions are left alone, which is particularly + useful in Node to load ESM-only libraries. If `preserveDynamicImport` is not + specified, `import` expressions are transformed into a promise-wrapped call to + `require`. +* **react-hot-loader**: Performs the equivalent of the `react-hot-loader/babel` + transform in the [react-hot-loader](https://github.com/gaearon/react-hot-loader) + project. This enables advanced hot reloading use cases such as editing of + bound methods. +* **jest**: Hoist desired [jest](https://jestjs.io/) method calls above imports in + the same way as [babel-plugin-jest-hoist](https://github.com/facebook/jest/tree/master/packages/babel-plugin-jest-hoist). + Does not validate the arguments passed to `jest.mock`, but the same rules still apply. + +When the `imports` transform is *not* specified (i.e. when targeting ESM), the +`injectCreateRequireForImportRequire` option can be specified to transform TS +`import foo = require("foo");` in a way that matches the +[TypeScript 4.7 behavior](https://devblogs.microsoft.com/typescript/announcing-typescript-4-7/#commonjs-interoperability) +with `module: nodenext`. + +These newer JS features are transformed by default: + +* [Optional chaining](https://github.com/tc39/proposal-optional-chaining): `a?.b` +* [Nullish coalescing](https://github.com/tc39/proposal-nullish-coalescing): `a ?? b` +* [Class fields](https://github.com/tc39/proposal-class-fields): `class C { x = 1; }`. + This includes static fields but not the `#x` private field syntax. +* [Numeric separators](https://github.com/tc39/proposal-numeric-separator): + `const n = 1_234;` +* [Optional catch binding](https://github.com/tc39/proposal-optional-catch-binding): + `try { doThing(); } catch { }`. + +If your target runtime supports these features, you can specify +`disableESTransforms: true` so that Sucrase preserves the syntax rather than +trying to transform it. Note that transpiled and standard class fields behave +slightly differently; see the +[TypeScript 3.7 release notes](https://www.typescriptlang.org/docs/handbook/release-notes/typescript-3-7.html#the-usedefineforclassfields-flag-and-the-declare-property-modifier) +for details. If you use TypeScript, you can enable the TypeScript option +`useDefineForClassFields` to enable error checking related to these differences. + +### Unsupported syntax + +All JS syntax not mentioned above will "pass through" and needs to be supported +by your JS runtime. For example: + +* Decorators, private fields, `throw` expressions, generator arrow functions, + and `do` expressions are all unsupported in browsers and Node (as of this + writing), and Sucrase doesn't make an attempt to transpile them. +* Object rest/spread, async functions, and async iterators are all recent + features that should work fine, but might cause issues if you use older + versions of tools like webpack. BigInt and newer regex features may or may not + work, based on your tooling. + +### JSX Options + +By default, JSX is compiled to React functions in development mode. This can be +configured with a few options: + +* **jsxRuntime**: A string specifying the transform mode, which can be one of three values: + * `"classic"` (default): The original JSX transform that calls `React.createElement` by default. + To configure for non-React use cases, specify: + * **jsxPragma**: Element creation function, defaults to `React.createElement`. + * **jsxFragmentPragma**: Fragment component, defaults to `React.Fragment`. + * `"automatic"`: The [new JSX transform](https://reactjs.org/blog/2020/09/22/introducing-the-new-jsx-transform.html) + introduced with React 17, which calls `jsx` functions and auto-adds import statements. + To configure for non-React use cases, specify: + * **jsxImportSource**: Package name for auto-generated import statements, defaults to `react`. + * `"preserve"`: Don't transform JSX, and instead emit it as-is in the output code. +* **production**: If `true`, use production version of functions and don't include debugging + information. When using React in production mode with the automatic transform, this *must* be + set to true to avoid an error about `jsxDEV` being missing. + +### Legacy CommonJS interop + +Two legacy modes can be used with the `imports` transform: + +* **enableLegacyTypeScriptModuleInterop**: Use the default TypeScript approach + to CommonJS interop instead of assuming that TypeScript's `--esModuleInterop` + flag is enabled. For example, if a CJS module exports a function, legacy + TypeScript interop requires you to write `import * as add from './add';`, + while Babel, Webpack, Node.js, and TypeScript with `--esModuleInterop` require + you to write `import add from './add';`. As mentioned in the + [docs](https://www.typescriptlang.org/docs/handbook/release-notes/typescript-2-7.html#support-for-import-d-from-cjs-form-commonjs-modules-with---esmoduleinterop), + the TypeScript team recommends you always use `--esModuleInterop`. +* **enableLegacyBabel5ModuleInterop**: Use the Babel 5 approach to CommonJS + interop, so that you can run `require('./MyModule')` instead of + `require('./MyModule').default`. Analogous to + [babel-plugin-add-module-exports](https://github.com/59naga/babel-plugin-add-module-exports). + +## Usage + +### Tool integrations + +* [Webpack](https://github.com/alangpierce/sucrase/tree/main/integrations/webpack-loader) +* [Gulp](https://github.com/alangpierce/sucrase/tree/main/integrations/gulp-plugin) +* [Jest](https://github.com/alangpierce/sucrase/tree/main/integrations/jest-plugin) +* [Rollup](https://github.com/rollup/plugins/tree/master/packages/sucrase) +* [Broccoli](https://github.com/stefanpenner/broccoli-sucrase) + +### Usage in Node + +The most robust way is to use the Sucrase plugin for [ts-node](https://github.com/TypeStrong/ts-node), +which has various Node integrations and configures Sucrase via `tsconfig.json`: +```bash +ts-node --transpiler sucrase/ts-node-plugin +``` + +For projects that don't target ESM, Sucrase also has a require hook with some +reasonable defaults that can be accessed in a few ways: + +* From code: `require("sucrase/register");` +* When invoking Node: `node -r sucrase/register main.ts` +* As a separate binary: `sucrase-node main.ts` + +Options can be passed to the require hook via a `SUCRASE_OPTIONS` environment +variable holding a JSON string of options. + +### Compiling a project to JS + +For simple use cases, Sucrase comes with a `sucrase` CLI that mirrors your +directory structure to an output directory: +```bash +sucrase ./srcDir -d ./outDir --transforms typescript,imports +``` + +### Usage from code + +For any advanced use cases, Sucrase can be called from JS directly: + +```js +import {transform} from "sucrase"; +const compiledCode = transform(code, {transforms: ["typescript", "imports"]}).code; +``` + +## What Sucrase is not + +Sucrase is intended to be useful for the most common cases, but it does not aim +to have nearly the scope and versatility of Babel. Some specific examples: + +* Sucrase does not check your code for errors. Sucrase's contract is that if you + give it valid code, it will produce valid JS code. If you give it invalid + code, it might produce invalid code, it might produce valid code, or it might + give an error. Always use Sucrase with a linter or typechecker, which is more + suited for error-checking. +* Sucrase is not pluginizable. With the current architecture, transforms need to + be explicitly written to cooperate with each other, so each additional + transform takes significant extra work. +* Sucrase is not good for prototyping language extensions and upcoming language + features. Its faster architecture makes new transforms more difficult to write + and more fragile. +* Sucrase will never produce code for old browsers like IE. Compiling code down + to ES5 is much more complicated than any transformation that Sucrase needs to + do. +* Sucrase is hesitant to implement upcoming JS features, although some of them + make sense to implement for pragmatic reasons. Its main focus is on language + extensions (JSX, TypeScript, Flow) that will never be supported by JS + runtimes. +* Like Babel, Sucrase is not a typechecker, and must process each file in + isolation. For example, TypeScript `const enum`s are treated as regular + `enum`s rather than inlining across files. +* You should think carefully before using Sucrase in production. Sucrase is + mostly beneficial in development, and in many cases, Babel or tsc will be more + suitable for production builds. + +See the [Project Vision](./docs/PROJECT_VISION.md) document for more details on +the philosophy behind Sucrase. + +## Motivation + +As JavaScript implementations mature, it becomes more and more reasonable to +disable Babel transforms, especially in development when you know that you're +targeting a modern runtime. You might hope that you could simplify and speed up +the build step by eventually disabling Babel entirely, but this isn't possible +if you're using a non-standard language extension like JSX, TypeScript, or Flow. +Unfortunately, disabling most transforms in Babel doesn't speed it up as much as +you might expect. To understand, let's take a look at how Babel works: + +1. Tokenize the input source code into a token stream. +2. Parse the token stream into an AST. +3. Walk the AST to compute the scope information for each variable. +4. Apply all transform plugins in a single traversal, resulting in a new AST. +5. Print the resulting AST. + +Only step 4 gets faster when disabling plugins, so there's always a fixed cost +to running Babel regardless of how many transforms are enabled. + +Sucrase bypasses most of these steps, and works like this: + +1. Tokenize the input source code into a token stream using a trimmed-down fork + of the Babel parser. This fork does not produce a full AST, but still + produces meaningful token metadata specifically designed for the later + transforms. +2. Scan through the tokens, computing preliminary information like all + imported/exported names. +3. Run the transform by doing a pass through the tokens and performing a number + of careful find-and-replace operations, like replacing ` 0 || + importInfo.namedExports.length > 0 + ) { + continue; + } + const names = [ + ...importInfo.defaultNames, + ...importInfo.wildcardNames, + ...importInfo.namedImports.map(({localName}) => localName), + ]; + if (names.every((name) => this.shouldAutomaticallyElideImportedName(name))) { + this.importsToReplace.set(path, ""); + } + } + } + + shouldAutomaticallyElideImportedName(name) { + return ( + this.isTypeScriptTransformEnabled && + !this.keepUnusedImports && + !this.nonTypeIdentifiers.has(name) + ); + } + + generateImportReplacements() { + for (const [path, importInfo] of this.importInfoByPath.entries()) { + const { + defaultNames, + wildcardNames, + namedImports, + namedExports, + exportStarNames, + hasStarExport, + } = importInfo; + + if ( + defaultNames.length === 0 && + wildcardNames.length === 0 && + namedImports.length === 0 && + namedExports.length === 0 && + exportStarNames.length === 0 && + !hasStarExport + ) { + // Import is never used, so don't even assign a name. + this.importsToReplace.set(path, `require('${path}');`); + continue; + } + + const primaryImportName = this.getFreeIdentifierForPath(path); + let secondaryImportName; + if (this.enableLegacyTypeScriptModuleInterop) { + secondaryImportName = primaryImportName; + } else { + secondaryImportName = + wildcardNames.length > 0 ? wildcardNames[0] : this.getFreeIdentifierForPath(path); + } + let requireCode = `var ${primaryImportName} = require('${path}');`; + if (wildcardNames.length > 0) { + for (const wildcardName of wildcardNames) { + const moduleExpr = this.enableLegacyTypeScriptModuleInterop + ? primaryImportName + : `${this.helperManager.getHelperName("interopRequireWildcard")}(${primaryImportName})`; + requireCode += ` var ${wildcardName} = ${moduleExpr};`; + } + } else if (exportStarNames.length > 0 && secondaryImportName !== primaryImportName) { + requireCode += ` var ${secondaryImportName} = ${this.helperManager.getHelperName( + "interopRequireWildcard", + )}(${primaryImportName});`; + } else if (defaultNames.length > 0 && secondaryImportName !== primaryImportName) { + requireCode += ` var ${secondaryImportName} = ${this.helperManager.getHelperName( + "interopRequireDefault", + )}(${primaryImportName});`; + } + + for (const {importedName, localName} of namedExports) { + requireCode += ` ${this.helperManager.getHelperName( + "createNamedExportFrom", + )}(${primaryImportName}, '${localName}', '${importedName}');`; + } + for (const exportStarName of exportStarNames) { + requireCode += ` exports.${exportStarName} = ${secondaryImportName};`; + } + if (hasStarExport) { + requireCode += ` ${this.helperManager.getHelperName( + "createStarExport", + )}(${primaryImportName});`; + } + + this.importsToReplace.set(path, requireCode); + + for (const defaultName of defaultNames) { + this.identifierReplacements.set(defaultName, `${secondaryImportName}.default`); + } + for (const {importedName, localName} of namedImports) { + this.identifierReplacements.set(localName, `${primaryImportName}.${importedName}`); + } + } + } + + getFreeIdentifierForPath(path) { + const components = path.split("/"); + const lastComponent = components[components.length - 1]; + const baseName = lastComponent.replace(/\W/g, ""); + return this.nameManager.claimFreeName(`_${baseName}`); + } + + preprocessImportAtIndex(index) { + const defaultNames = []; + const wildcardNames = []; + const namedImports = []; + + index++; + if ( + (this.tokens.matchesContextualAtIndex(index, _keywords.ContextualKeyword._type) || + this.tokens.matches1AtIndex(index, _types.TokenType._typeof)) && + !this.tokens.matches1AtIndex(index + 1, _types.TokenType.comma) && + !this.tokens.matchesContextualAtIndex(index + 1, _keywords.ContextualKeyword._from) + ) { + // import type declaration, so no need to process anything. + return; + } + + if (this.tokens.matches1AtIndex(index, _types.TokenType.parenL)) { + // Dynamic import, so nothing to do + return; + } + + if (this.tokens.matches1AtIndex(index, _types.TokenType.name)) { + defaultNames.push(this.tokens.identifierNameAtIndex(index)); + index++; + if (this.tokens.matches1AtIndex(index, _types.TokenType.comma)) { + index++; + } + } + + if (this.tokens.matches1AtIndex(index, _types.TokenType.star)) { + // * as + index += 2; + wildcardNames.push(this.tokens.identifierNameAtIndex(index)); + index++; + } + + if (this.tokens.matches1AtIndex(index, _types.TokenType.braceL)) { + const result = this.getNamedImports(index + 1); + index = result.newIndex; + + for (const namedImport of result.namedImports) { + // Treat {default as X} as a default import to ensure usage of require interop helper + if (namedImport.importedName === "default") { + defaultNames.push(namedImport.localName); + } else { + namedImports.push(namedImport); + } + } + } + + if (this.tokens.matchesContextualAtIndex(index, _keywords.ContextualKeyword._from)) { + index++; + } + + if (!this.tokens.matches1AtIndex(index, _types.TokenType.string)) { + throw new Error("Expected string token at the end of import statement."); + } + const path = this.tokens.stringValueAtIndex(index); + const importInfo = this.getImportInfo(path); + importInfo.defaultNames.push(...defaultNames); + importInfo.wildcardNames.push(...wildcardNames); + importInfo.namedImports.push(...namedImports); + if (defaultNames.length === 0 && wildcardNames.length === 0 && namedImports.length === 0) { + importInfo.hasBareImport = true; + } + } + + preprocessExportAtIndex(index) { + if ( + this.tokens.matches2AtIndex(index, _types.TokenType._export, _types.TokenType._var) || + this.tokens.matches2AtIndex(index, _types.TokenType._export, _types.TokenType._let) || + this.tokens.matches2AtIndex(index, _types.TokenType._export, _types.TokenType._const) + ) { + this.preprocessVarExportAtIndex(index); + } else if ( + this.tokens.matches2AtIndex(index, _types.TokenType._export, _types.TokenType._function) || + this.tokens.matches2AtIndex(index, _types.TokenType._export, _types.TokenType._class) + ) { + const exportName = this.tokens.identifierNameAtIndex(index + 2); + this.addExportBinding(exportName, exportName); + } else if (this.tokens.matches3AtIndex(index, _types.TokenType._export, _types.TokenType.name, _types.TokenType._function)) { + const exportName = this.tokens.identifierNameAtIndex(index + 3); + this.addExportBinding(exportName, exportName); + } else if (this.tokens.matches2AtIndex(index, _types.TokenType._export, _types.TokenType.braceL)) { + this.preprocessNamedExportAtIndex(index); + } else if (this.tokens.matches2AtIndex(index, _types.TokenType._export, _types.TokenType.star)) { + this.preprocessExportStarAtIndex(index); + } + } + + preprocessVarExportAtIndex(index) { + let depth = 0; + // Handle cases like `export let {x} = y;`, starting at the open-brace in that case. + for (let i = index + 2; ; i++) { + if ( + this.tokens.matches1AtIndex(i, _types.TokenType.braceL) || + this.tokens.matches1AtIndex(i, _types.TokenType.dollarBraceL) || + this.tokens.matches1AtIndex(i, _types.TokenType.bracketL) + ) { + depth++; + } else if ( + this.tokens.matches1AtIndex(i, _types.TokenType.braceR) || + this.tokens.matches1AtIndex(i, _types.TokenType.bracketR) + ) { + depth--; + } else if (depth === 0 && !this.tokens.matches1AtIndex(i, _types.TokenType.name)) { + break; + } else if (this.tokens.matches1AtIndex(1, _types.TokenType.eq)) { + const endIndex = this.tokens.currentToken().rhsEndIndex; + if (endIndex == null) { + throw new Error("Expected = token with an end index."); + } + i = endIndex - 1; + } else { + const token = this.tokens.tokens[i]; + if (_tokenizer.isDeclaration.call(void 0, token)) { + const exportName = this.tokens.identifierNameAtIndex(i); + this.identifierReplacements.set(exportName, `exports.${exportName}`); + } + } + } + } + + /** + * Walk this export statement just in case it's an export...from statement. + * If it is, combine it into the import info for that path. Otherwise, just + * bail out; it'll be handled later. + */ + preprocessNamedExportAtIndex(index) { + // export { + index += 2; + const {newIndex, namedImports} = this.getNamedImports(index); + index = newIndex; + + if (this.tokens.matchesContextualAtIndex(index, _keywords.ContextualKeyword._from)) { + index++; + } else { + // Reinterpret "a as b" to be local/exported rather than imported/local. + for (const {importedName: localName, localName: exportedName} of namedImports) { + this.addExportBinding(localName, exportedName); + } + return; + } + + if (!this.tokens.matches1AtIndex(index, _types.TokenType.string)) { + throw new Error("Expected string token at the end of import statement."); + } + const path = this.tokens.stringValueAtIndex(index); + const importInfo = this.getImportInfo(path); + importInfo.namedExports.push(...namedImports); + } + + preprocessExportStarAtIndex(index) { + let exportedName = null; + if (this.tokens.matches3AtIndex(index, _types.TokenType._export, _types.TokenType.star, _types.TokenType._as)) { + // export * as + index += 3; + exportedName = this.tokens.identifierNameAtIndex(index); + // foo from + index += 2; + } else { + // export * from + index += 3; + } + if (!this.tokens.matches1AtIndex(index, _types.TokenType.string)) { + throw new Error("Expected string token at the end of star export statement."); + } + const path = this.tokens.stringValueAtIndex(index); + const importInfo = this.getImportInfo(path); + if (exportedName !== null) { + importInfo.exportStarNames.push(exportedName); + } else { + importInfo.hasStarExport = true; + } + } + + getNamedImports(index) { + const namedImports = []; + while (true) { + if (this.tokens.matches1AtIndex(index, _types.TokenType.braceR)) { + index++; + break; + } + + const specifierInfo = _getImportExportSpecifierInfo2.default.call(void 0, this.tokens, index); + index = specifierInfo.endIndex; + if (!specifierInfo.isType) { + namedImports.push({ + importedName: specifierInfo.leftName, + localName: specifierInfo.rightName, + }); + } + + if (this.tokens.matches2AtIndex(index, _types.TokenType.comma, _types.TokenType.braceR)) { + index += 2; + break; + } else if (this.tokens.matches1AtIndex(index, _types.TokenType.braceR)) { + index++; + break; + } else if (this.tokens.matches1AtIndex(index, _types.TokenType.comma)) { + index++; + } else { + throw new Error(`Unexpected token: ${JSON.stringify(this.tokens.tokens[index])}`); + } + } + return {newIndex: index, namedImports}; + } + + /** + * Get a mutable import info object for this path, creating one if it doesn't + * exist yet. + */ + getImportInfo(path) { + const existingInfo = this.importInfoByPath.get(path); + if (existingInfo) { + return existingInfo; + } + const newInfo = { + defaultNames: [], + wildcardNames: [], + namedImports: [], + namedExports: [], + hasBareImport: false, + exportStarNames: [], + hasStarExport: false, + }; + this.importInfoByPath.set(path, newInfo); + return newInfo; + } + + addExportBinding(localName, exportedName) { + if (!this.exportBindingsByLocalName.has(localName)) { + this.exportBindingsByLocalName.set(localName, []); + } + this.exportBindingsByLocalName.get(localName).push(exportedName); + } + + /** + * Return the code to use for the import for this path, or the empty string if + * the code has already been "claimed" by a previous import. + */ + claimImportCode(importPath) { + const result = this.importsToReplace.get(importPath); + this.importsToReplace.set(importPath, ""); + return result || ""; + } + + getIdentifierReplacement(identifierName) { + return this.identifierReplacements.get(identifierName) || null; + } + + /** + * Return a string like `exports.foo = exports.bar`. + */ + resolveExportBinding(assignedName) { + const exportedNames = this.exportBindingsByLocalName.get(assignedName); + if (!exportedNames || exportedNames.length === 0) { + return null; + } + return exportedNames.map((exportedName) => `exports.${exportedName}`).join(" = "); + } + + /** + * Return all imported/exported names where we might be interested in whether usages of those + * names are shadowed. + */ + getGlobalNames() { + return new Set([ + ...this.identifierReplacements.keys(), + ...this.exportBindingsByLocalName.keys(), + ]); + } +} exports.default = CJSImportProcessor; Index: frontend/node_modules/sucrase/dist/HelperManager.js =================================================================== --- frontend/node_modules/sucrase/dist/HelperManager.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/HelperManager.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,176 @@ +"use strict";Object.defineProperty(exports, "__esModule", {value: true}); + +const HELPERS = { + require: ` + import {createRequire as CREATE_REQUIRE_NAME} from "module"; + const require = CREATE_REQUIRE_NAME(import.meta.url); + `, + interopRequireWildcard: ` + function interopRequireWildcard(obj) { + if (obj && obj.__esModule) { + return obj; + } else { + var newObj = {}; + if (obj != null) { + for (var key in obj) { + if (Object.prototype.hasOwnProperty.call(obj, key)) { + newObj[key] = obj[key]; + } + } + } + newObj.default = obj; + return newObj; + } + } + `, + interopRequireDefault: ` + function interopRequireDefault(obj) { + return obj && obj.__esModule ? obj : { default: obj }; + } + `, + createNamedExportFrom: ` + function createNamedExportFrom(obj, localName, importedName) { + Object.defineProperty(exports, localName, {enumerable: true, configurable: true, get: () => obj[importedName]}); + } + `, + // Note that TypeScript and Babel do this differently; TypeScript does a simple existence + // check in the exports object and does a plain assignment, whereas Babel uses + // defineProperty and builds an object of explicitly-exported names so that star exports can + // always take lower precedence. For now, we do the easier TypeScript thing. + createStarExport: ` + function createStarExport(obj) { + Object.keys(obj) + .filter((key) => key !== "default" && key !== "__esModule") + .forEach((key) => { + if (exports.hasOwnProperty(key)) { + return; + } + Object.defineProperty(exports, key, {enumerable: true, configurable: true, get: () => obj[key]}); + }); + } + `, + nullishCoalesce: ` + function nullishCoalesce(lhs, rhsFn) { + if (lhs != null) { + return lhs; + } else { + return rhsFn(); + } + } + `, + asyncNullishCoalesce: ` + async function asyncNullishCoalesce(lhs, rhsFn) { + if (lhs != null) { + return lhs; + } else { + return await rhsFn(); + } + } + `, + optionalChain: ` + function optionalChain(ops) { + let lastAccessLHS = undefined; + let value = ops[0]; + let i = 1; + while (i < ops.length) { + const op = ops[i]; + const fn = ops[i + 1]; + i += 2; + if ((op === 'optionalAccess' || op === 'optionalCall') && value == null) { + return undefined; + } + if (op === 'access' || op === 'optionalAccess') { + lastAccessLHS = value; + value = fn(value); + } else if (op === 'call' || op === 'optionalCall') { + value = fn((...args) => value.call(lastAccessLHS, ...args)); + lastAccessLHS = undefined; + } + } + return value; + } + `, + asyncOptionalChain: ` + async function asyncOptionalChain(ops) { + let lastAccessLHS = undefined; + let value = ops[0]; + let i = 1; + while (i < ops.length) { + const op = ops[i]; + const fn = ops[i + 1]; + i += 2; + if ((op === 'optionalAccess' || op === 'optionalCall') && value == null) { + return undefined; + } + if (op === 'access' || op === 'optionalAccess') { + lastAccessLHS = value; + value = await fn(value); + } else if (op === 'call' || op === 'optionalCall') { + value = await fn((...args) => value.call(lastAccessLHS, ...args)); + lastAccessLHS = undefined; + } + } + return value; + } + `, + optionalChainDelete: ` + function optionalChainDelete(ops) { + const result = OPTIONAL_CHAIN_NAME(ops); + return result == null ? true : result; + } + `, + asyncOptionalChainDelete: ` + async function asyncOptionalChainDelete(ops) { + const result = await ASYNC_OPTIONAL_CHAIN_NAME(ops); + return result == null ? true : result; + } + `, +}; + + class HelperManager { + __init() {this.helperNames = {}} + __init2() {this.createRequireName = null} + constructor( nameManager) {;this.nameManager = nameManager;HelperManager.prototype.__init.call(this);HelperManager.prototype.__init2.call(this);} + + getHelperName(baseName) { + let helperName = this.helperNames[baseName]; + if (helperName) { + return helperName; + } + helperName = this.nameManager.claimFreeName(`_${baseName}`); + this.helperNames[baseName] = helperName; + return helperName; + } + + emitHelpers() { + let resultCode = ""; + if (this.helperNames.optionalChainDelete) { + this.getHelperName("optionalChain"); + } + if (this.helperNames.asyncOptionalChainDelete) { + this.getHelperName("asyncOptionalChain"); + } + for (const [baseName, helperCodeTemplate] of Object.entries(HELPERS)) { + const helperName = this.helperNames[baseName]; + let helperCode = helperCodeTemplate; + if (baseName === "optionalChainDelete") { + helperCode = helperCode.replace("OPTIONAL_CHAIN_NAME", this.helperNames.optionalChain); + } else if (baseName === "asyncOptionalChainDelete") { + helperCode = helperCode.replace( + "ASYNC_OPTIONAL_CHAIN_NAME", + this.helperNames.asyncOptionalChain, + ); + } else if (baseName === "require") { + if (this.createRequireName === null) { + this.createRequireName = this.nameManager.claimFreeName("_createRequire"); + } + helperCode = helperCode.replace(/CREATE_REQUIRE_NAME/g, this.createRequireName); + } + if (helperName) { + resultCode += " "; + resultCode += helperCode.replace(baseName, helperName).replace(/\s+/g, " ").trim(); + } + } + return resultCode; + } +} exports.HelperManager = HelperManager; Index: frontend/node_modules/sucrase/dist/NameManager.js =================================================================== --- frontend/node_modules/sucrase/dist/NameManager.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/NameManager.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,27 @@ +"use strict";Object.defineProperty(exports, "__esModule", {value: true}); function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; } +var _getIdentifierNames = require('./util/getIdentifierNames'); var _getIdentifierNames2 = _interopRequireDefault(_getIdentifierNames); + + class NameManager { + __init() {this.usedNames = new Set()} + + constructor(code, tokens) {;NameManager.prototype.__init.call(this); + this.usedNames = new Set(_getIdentifierNames2.default.call(void 0, code, tokens)); + } + + claimFreeName(name) { + const newName = this.findFreeName(name); + this.usedNames.add(newName); + return newName; + } + + findFreeName(name) { + if (!this.usedNames.has(name)) { + return name; + } + let suffixNum = 2; + while (this.usedNames.has(name + String(suffixNum))) { + suffixNum++; + } + return name + String(suffixNum); + } +} exports.default = NameManager; Index: frontend/node_modules/sucrase/dist/Options-gen-types.js =================================================================== --- frontend/node_modules/sucrase/dist/Options-gen-types.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/Options-gen-types.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,42 @@ +"use strict";Object.defineProperty(exports, "__esModule", {value: true}); function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { newObj[key] = obj[key]; } } } newObj.default = obj; return newObj; } }/** + * This module was automatically generated by `ts-interface-builder` + */ +var _tsinterfacechecker = require('ts-interface-checker'); var t = _interopRequireWildcard(_tsinterfacechecker); +// tslint:disable:object-literal-key-quotes + + const Transform = t.union( + t.lit("jsx"), + t.lit("typescript"), + t.lit("flow"), + t.lit("imports"), + t.lit("react-hot-loader"), + t.lit("jest"), +); exports.Transform = Transform; + + const SourceMapOptions = t.iface([], { + compiledFilename: "string", +}); exports.SourceMapOptions = SourceMapOptions; + + const Options = t.iface([], { + transforms: t.array("Transform"), + disableESTransforms: t.opt("boolean"), + jsxRuntime: t.opt(t.union(t.lit("classic"), t.lit("automatic"), t.lit("preserve"))), + production: t.opt("boolean"), + jsxImportSource: t.opt("string"), + jsxPragma: t.opt("string"), + jsxFragmentPragma: t.opt("string"), + keepUnusedImports: t.opt("boolean"), + preserveDynamicImport: t.opt("boolean"), + injectCreateRequireForImportRequire: t.opt("boolean"), + enableLegacyTypeScriptModuleInterop: t.opt("boolean"), + enableLegacyBabel5ModuleInterop: t.opt("boolean"), + sourceMapOptions: t.opt("SourceMapOptions"), + filePath: t.opt("string"), +}); exports.Options = Options; + +const exportedTypeSuite = { + Transform: exports.Transform, + SourceMapOptions: exports.SourceMapOptions, + Options: exports.Options, +}; +exports. default = exportedTypeSuite; Index: frontend/node_modules/sucrase/dist/Options.js =================================================================== --- frontend/node_modules/sucrase/dist/Options.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/Options.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,101 @@ +"use strict";Object.defineProperty(exports, "__esModule", {value: true}); function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }var _tsinterfacechecker = require('ts-interface-checker'); + +var _Optionsgentypes = require('./Options-gen-types'); var _Optionsgentypes2 = _interopRequireDefault(_Optionsgentypes); + +const {Options: OptionsChecker} = _tsinterfacechecker.createCheckers.call(void 0, _Optionsgentypes2.default); + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + function validateOptions(options) { + OptionsChecker.strictCheck(options); +} exports.validateOptions = validateOptions; Index: frontend/node_modules/sucrase/dist/TokenProcessor.js =================================================================== --- frontend/node_modules/sucrase/dist/TokenProcessor.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/TokenProcessor.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,357 @@ +"use strict";Object.defineProperty(exports, "__esModule", {value: true}); function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; } + + +var _types = require('./parser/tokenizer/types'); +var _isAsyncOperation = require('./util/isAsyncOperation'); var _isAsyncOperation2 = _interopRequireDefault(_isAsyncOperation); + + + + + + + + + + + + class TokenProcessor { + __init() {this.resultCode = ""} + // Array mapping input token index to optional string index position in the + // output code. + __init2() {this.resultMappings = new Array(this.tokens.length)} + __init3() {this.tokenIndex = 0} + + constructor( + code, + tokens, + isFlowEnabled, + disableESTransforms, + helperManager, + ) {;this.code = code;this.tokens = tokens;this.isFlowEnabled = isFlowEnabled;this.disableESTransforms = disableESTransforms;this.helperManager = helperManager;TokenProcessor.prototype.__init.call(this);TokenProcessor.prototype.__init2.call(this);TokenProcessor.prototype.__init3.call(this);} + + /** + * Snapshot the token state in a way that can be restored later, useful for + * things like lookahead. + * + * resultMappings do not need to be copied since in all use cases, they will + * be overwritten anyway after restore. + */ + snapshot() { + return { + resultCode: this.resultCode, + tokenIndex: this.tokenIndex, + }; + } + + restoreToSnapshot(snapshot) { + this.resultCode = snapshot.resultCode; + this.tokenIndex = snapshot.tokenIndex; + } + + /** + * Remove and return the code generated since the snapshot, leaving the + * current token position in-place. Unlike most TokenProcessor operations, + * this operation can result in input/output line number mismatches because + * the removed code may contain newlines, so this operation should be used + * sparingly. + */ + dangerouslyGetAndRemoveCodeSinceSnapshot(snapshot) { + const result = this.resultCode.slice(snapshot.resultCode.length); + this.resultCode = snapshot.resultCode; + return result; + } + + reset() { + this.resultCode = ""; + this.resultMappings = new Array(this.tokens.length); + this.tokenIndex = 0; + } + + matchesContextualAtIndex(index, contextualKeyword) { + return ( + this.matches1AtIndex(index, _types.TokenType.name) && + this.tokens[index].contextualKeyword === contextualKeyword + ); + } + + identifierNameAtIndex(index) { + // TODO: We need to process escapes since technically you can have unicode escapes in variable + // names. + return this.identifierNameForToken(this.tokens[index]); + } + + identifierNameAtRelativeIndex(relativeIndex) { + return this.identifierNameForToken(this.tokenAtRelativeIndex(relativeIndex)); + } + + identifierName() { + return this.identifierNameForToken(this.currentToken()); + } + + identifierNameForToken(token) { + return this.code.slice(token.start, token.end); + } + + rawCodeForToken(token) { + return this.code.slice(token.start, token.end); + } + + stringValueAtIndex(index) { + return this.stringValueForToken(this.tokens[index]); + } + + stringValue() { + return this.stringValueForToken(this.currentToken()); + } + + stringValueForToken(token) { + // This is used to identify when two imports are the same and to resolve TypeScript enum keys. + // Ideally we'd process escapes within the strings, but for now we pretty much take the raw + // code. + return this.code.slice(token.start + 1, token.end - 1); + } + + matches1AtIndex(index, t1) { + return this.tokens[index].type === t1; + } + + matches2AtIndex(index, t1, t2) { + return this.tokens[index].type === t1 && this.tokens[index + 1].type === t2; + } + + matches3AtIndex(index, t1, t2, t3) { + return ( + this.tokens[index].type === t1 && + this.tokens[index + 1].type === t2 && + this.tokens[index + 2].type === t3 + ); + } + + matches1(t1) { + return this.tokens[this.tokenIndex].type === t1; + } + + matches2(t1, t2) { + return this.tokens[this.tokenIndex].type === t1 && this.tokens[this.tokenIndex + 1].type === t2; + } + + matches3(t1, t2, t3) { + return ( + this.tokens[this.tokenIndex].type === t1 && + this.tokens[this.tokenIndex + 1].type === t2 && + this.tokens[this.tokenIndex + 2].type === t3 + ); + } + + matches4(t1, t2, t3, t4) { + return ( + this.tokens[this.tokenIndex].type === t1 && + this.tokens[this.tokenIndex + 1].type === t2 && + this.tokens[this.tokenIndex + 2].type === t3 && + this.tokens[this.tokenIndex + 3].type === t4 + ); + } + + matches5(t1, t2, t3, t4, t5) { + return ( + this.tokens[this.tokenIndex].type === t1 && + this.tokens[this.tokenIndex + 1].type === t2 && + this.tokens[this.tokenIndex + 2].type === t3 && + this.tokens[this.tokenIndex + 3].type === t4 && + this.tokens[this.tokenIndex + 4].type === t5 + ); + } + + matchesContextual(contextualKeyword) { + return this.matchesContextualAtIndex(this.tokenIndex, contextualKeyword); + } + + matchesContextIdAndLabel(type, contextId) { + return this.matches1(type) && this.currentToken().contextId === contextId; + } + + previousWhitespaceAndComments() { + let whitespaceAndComments = this.code.slice( + this.tokenIndex > 0 ? this.tokens[this.tokenIndex - 1].end : 0, + this.tokenIndex < this.tokens.length ? this.tokens[this.tokenIndex].start : this.code.length, + ); + if (this.isFlowEnabled) { + whitespaceAndComments = whitespaceAndComments.replace(/@flow/g, ""); + } + return whitespaceAndComments; + } + + replaceToken(newCode) { + this.resultCode += this.previousWhitespaceAndComments(); + this.appendTokenPrefix(); + this.resultMappings[this.tokenIndex] = this.resultCode.length; + this.resultCode += newCode; + this.appendTokenSuffix(); + this.tokenIndex++; + } + + replaceTokenTrimmingLeftWhitespace(newCode) { + this.resultCode += this.previousWhitespaceAndComments().replace(/[^\r\n]/g, ""); + this.appendTokenPrefix(); + this.resultMappings[this.tokenIndex] = this.resultCode.length; + this.resultCode += newCode; + this.appendTokenSuffix(); + this.tokenIndex++; + } + + removeInitialToken() { + this.replaceToken(""); + } + + removeToken() { + this.replaceTokenTrimmingLeftWhitespace(""); + } + + /** + * Remove all code until the next }, accounting for balanced braces. + */ + removeBalancedCode() { + let braceDepth = 0; + while (!this.isAtEnd()) { + if (this.matches1(_types.TokenType.braceL)) { + braceDepth++; + } else if (this.matches1(_types.TokenType.braceR)) { + if (braceDepth === 0) { + return; + } + braceDepth--; + } + this.removeToken(); + } + } + + copyExpectedToken(tokenType) { + if (this.tokens[this.tokenIndex].type !== tokenType) { + throw new Error(`Expected token ${tokenType}`); + } + this.copyToken(); + } + + copyToken() { + this.resultCode += this.previousWhitespaceAndComments(); + this.appendTokenPrefix(); + this.resultMappings[this.tokenIndex] = this.resultCode.length; + this.resultCode += this.code.slice( + this.tokens[this.tokenIndex].start, + this.tokens[this.tokenIndex].end, + ); + this.appendTokenSuffix(); + this.tokenIndex++; + } + + copyTokenWithPrefix(prefix) { + this.resultCode += this.previousWhitespaceAndComments(); + this.appendTokenPrefix(); + this.resultCode += prefix; + this.resultMappings[this.tokenIndex] = this.resultCode.length; + this.resultCode += this.code.slice( + this.tokens[this.tokenIndex].start, + this.tokens[this.tokenIndex].end, + ); + this.appendTokenSuffix(); + this.tokenIndex++; + } + + appendTokenPrefix() { + const token = this.currentToken(); + if (token.numNullishCoalesceStarts || token.isOptionalChainStart) { + token.isAsyncOperation = _isAsyncOperation2.default.call(void 0, this); + } + if (this.disableESTransforms) { + return; + } + if (token.numNullishCoalesceStarts) { + for (let i = 0; i < token.numNullishCoalesceStarts; i++) { + if (token.isAsyncOperation) { + this.resultCode += "await "; + this.resultCode += this.helperManager.getHelperName("asyncNullishCoalesce"); + } else { + this.resultCode += this.helperManager.getHelperName("nullishCoalesce"); + } + this.resultCode += "("; + } + } + if (token.isOptionalChainStart) { + if (token.isAsyncOperation) { + this.resultCode += "await "; + } + if (this.tokenIndex > 0 && this.tokenAtRelativeIndex(-1).type === _types.TokenType._delete) { + if (token.isAsyncOperation) { + this.resultCode += this.helperManager.getHelperName("asyncOptionalChainDelete"); + } else { + this.resultCode += this.helperManager.getHelperName("optionalChainDelete"); + } + } else if (token.isAsyncOperation) { + this.resultCode += this.helperManager.getHelperName("asyncOptionalChain"); + } else { + this.resultCode += this.helperManager.getHelperName("optionalChain"); + } + this.resultCode += "(["; + } + } + + appendTokenSuffix() { + const token = this.currentToken(); + if (token.isOptionalChainEnd && !this.disableESTransforms) { + this.resultCode += "])"; + } + if (token.numNullishCoalesceEnds && !this.disableESTransforms) { + for (let i = 0; i < token.numNullishCoalesceEnds; i++) { + this.resultCode += "))"; + } + } + } + + appendCode(code) { + this.resultCode += code; + } + + currentToken() { + return this.tokens[this.tokenIndex]; + } + + currentTokenCode() { + const token = this.currentToken(); + return this.code.slice(token.start, token.end); + } + + tokenAtRelativeIndex(relativeIndex) { + return this.tokens[this.tokenIndex + relativeIndex]; + } + + currentIndex() { + return this.tokenIndex; + } + + /** + * Move to the next token. Only suitable in preprocessing steps. When + * generating new code, you should use copyToken or removeToken. + */ + nextToken() { + if (this.tokenIndex === this.tokens.length) { + throw new Error("Unexpectedly reached end of input."); + } + this.tokenIndex++; + } + + previousToken() { + this.tokenIndex--; + } + + finish() { + if (this.tokenIndex !== this.tokens.length) { + throw new Error("Tried to finish processing tokens before reaching the end."); + } + this.resultCode += this.previousWhitespaceAndComments(); + return {code: this.resultCode, mappings: this.resultMappings}; + } + + isAtEnd() { + return this.tokenIndex === this.tokens.length; + } +} exports.default = TokenProcessor; Index: frontend/node_modules/sucrase/dist/cli.js =================================================================== --- frontend/node_modules/sucrase/dist/cli.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/cli.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,317 @@ +"use strict";Object.defineProperty(exports, "__esModule", {value: true}); function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }/* eslint-disable no-console */ +var _commander = require('commander'); var _commander2 = _interopRequireDefault(_commander); +var _tinyglobby = require('tinyglobby'); +var _fs = require('mz/fs'); +var _path = require('path'); + +var _index = require('./index'); + + + + + + + + + + + + function run() { + _commander2.default + .description(`Sucrase: super-fast Babel alternative.`) + .usage("[options] ") + .option( + "-d, --out-dir ", + "Compile an input directory of modules into an output directory.", + ) + .option( + "-p, --project ", + "Compile a TypeScript project, will read from tsconfig.json in ", + ) + .option("--out-extension ", "File extension to use for all output files.", "js") + .option("--exclude-dirs ", "Names of directories that should not be traversed.") + .option("-q, --quiet", "Don't print the names of converted files.") + .option("-t, --transforms ", "Comma-separated list of transforms to run.") + .option("--disable-es-transforms", "Opt out of all ES syntax transforms.") + .option("--jsx-runtime ", "Transformation mode for the JSX transform.") + .option("--production", "Disable debugging information from JSX in output.") + .option( + "--jsx-import-source ", + "Automatic JSX transform import path prefix, defaults to `React.Fragment`.", + ) + .option( + "--jsx-pragma ", + "Classic JSX transform element creation function, defaults to `React.createElement`.", + ) + .option( + "--jsx-fragment-pragma ", + "Classic JSX transform fragment component, defaults to `React.Fragment`.", + ) + .option("--keep-unused-imports", "Disable automatic removal of type-only imports/exports.") + .option("--preserve-dynamic-import", "Don't transpile dynamic import() to require.") + .option( + "--inject-create-require-for-import-require", + "Use `createRequire` when transpiling TS `import = require` to ESM.", + ) + .option( + "--enable-legacy-typescript-module-interop", + "Use default TypeScript ESM/CJS interop strategy.", + ) + .option("--enable-legacy-babel5-module-interop", "Use Babel 5 ESM/CJS interop strategy.") + .parse(process.argv); + + if (_commander2.default.project) { + if ( + _commander2.default.outDir || + _commander2.default.transforms || + _commander2.default.args[0] || + _commander2.default.enableLegacyTypescriptModuleInterop + ) { + console.error( + "If TypeScript project is specified, out directory, transforms, source " + + "directory, and --enable-legacy-typescript-module-interop may not be specified.", + ); + process.exit(1); + } + } else { + if (!_commander2.default.outDir) { + console.error("Out directory is required"); + process.exit(1); + } + + if (!_commander2.default.transforms) { + console.error("Transforms option is required."); + process.exit(1); + } + + if (!_commander2.default.args[0]) { + console.error("Source directory is required."); + process.exit(1); + } + } + + const options = { + outDirPath: _commander2.default.outDir, + srcDirPath: _commander2.default.args[0], + project: _commander2.default.project, + outExtension: _commander2.default.outExtension, + excludeDirs: _commander2.default.excludeDirs ? _commander2.default.excludeDirs.split(",") : [], + quiet: _commander2.default.quiet, + sucraseOptions: { + transforms: _commander2.default.transforms ? _commander2.default.transforms.split(",") : [], + disableESTransforms: _commander2.default.disableEsTransforms, + jsxRuntime: _commander2.default.jsxRuntime, + production: _commander2.default.production, + jsxImportSource: _commander2.default.jsxImportSource, + jsxPragma: _commander2.default.jsxPragma || "React.createElement", + jsxFragmentPragma: _commander2.default.jsxFragmentPragma || "React.Fragment", + keepUnusedImports: _commander2.default.keepUnusedImports, + preserveDynamicImport: _commander2.default.preserveDynamicImport, + injectCreateRequireForImportRequire: _commander2.default.injectCreateRequireForImportRequire, + enableLegacyTypeScriptModuleInterop: _commander2.default.enableLegacyTypescriptModuleInterop, + enableLegacyBabel5ModuleInterop: _commander2.default.enableLegacyBabel5ModuleInterop, + }, + }; + + buildDirectory(options).catch((e) => { + process.exitCode = 1; + console.error(e); + }); +} exports.default = run; + + + + + + +async function findFiles(options) { + const outDirPath = options.outDirPath; + const srcDirPath = options.srcDirPath; + + const extensions = options.sucraseOptions.transforms.includes("typescript") + ? [".ts", ".tsx"] + : [".js", ".jsx"]; + + if (!(await _fs.exists.call(void 0, outDirPath))) { + await _fs.mkdir.call(void 0, outDirPath); + } + + const outArr = []; + for (const child of await _fs.readdir.call(void 0, srcDirPath)) { + if (["node_modules", ".git"].includes(child) || options.excludeDirs.includes(child)) { + continue; + } + const srcChildPath = _path.join.call(void 0, srcDirPath, child); + const outChildPath = _path.join.call(void 0, outDirPath, child); + if ((await _fs.stat.call(void 0, srcChildPath)).isDirectory()) { + const innerOptions = {...options}; + innerOptions.srcDirPath = srcChildPath; + innerOptions.outDirPath = outChildPath; + const innerFiles = await findFiles(innerOptions); + outArr.push(...innerFiles); + } else if (extensions.some((ext) => srcChildPath.endsWith(ext))) { + const outPath = outChildPath.replace(/\.\w+$/, `.${options.outExtension}`); + outArr.push({ + srcPath: srcChildPath, + outPath, + }); + } + } + + return outArr; +} + +async function runGlob(options) { + const tsConfigPath = _path.join.call(void 0, options.project, "tsconfig.json"); + + let str; + try { + str = await _fs.readFile.call(void 0, tsConfigPath, "utf8"); + } catch (err) { + console.error("Could not find project tsconfig.json"); + console.error(` --project=${options.project}`); + console.error(err); + process.exit(1); + } + const json = JSON.parse(str); + + const foundFiles = []; + + const files = json.files; + const include = json.include; + + const absProject = _path.join.call(void 0, process.cwd(), options.project); + const outDirs = []; + + if (!(await _fs.exists.call(void 0, options.outDirPath))) { + await _fs.mkdir.call(void 0, options.outDirPath); + } + + if (files) { + for (const file of files) { + if (file.endsWith(".d.ts")) { + continue; + } + if (!file.endsWith(".ts") && !file.endsWith(".js")) { + continue; + } + + const srcFile = _path.join.call(void 0, absProject, file); + const outFile = _path.join.call(void 0, options.outDirPath, file); + const outPath = outFile.replace(/\.\w+$/, `.${options.outExtension}`); + + const outDir = _path.dirname.call(void 0, outPath); + if (!outDirs.includes(outDir)) { + outDirs.push(outDir); + } + + foundFiles.push({ + srcPath: srcFile, + outPath, + }); + } + } + if (include) { + for (const pattern of include) { + const globFiles = await _tinyglobby.glob.call(void 0, _path.join.call(void 0, absProject, pattern), {expandDirectories: false}); + for (const file of globFiles) { + if (!file.endsWith(".ts") && !file.endsWith(".js")) { + continue; + } + if (file.endsWith(".d.ts")) { + continue; + } + + const relativeFile = _path.relative.call(void 0, absProject, file); + const outFile = _path.join.call(void 0, options.outDirPath, relativeFile); + const outPath = outFile.replace(/\.\w+$/, `.${options.outExtension}`); + + const outDir = _path.dirname.call(void 0, outPath); + if (!outDirs.includes(outDir)) { + outDirs.push(outDir); + } + + foundFiles.push({ + srcPath: file, + outPath, + }); + } + } + } + + for (const outDirPath of outDirs) { + if (!(await _fs.exists.call(void 0, outDirPath))) { + await _fs.mkdir.call(void 0, outDirPath); + } + } + + // TODO: read exclude + + return foundFiles; +} + +async function updateOptionsFromProject(options) { + /** + * Read the project information and assign the following. + * - outDirPath + * - transform: imports + * - transform: typescript + * - enableLegacyTypescriptModuleInterop: true/false. + */ + + const tsConfigPath = _path.join.call(void 0, options.project, "tsconfig.json"); + + let str; + try { + str = await _fs.readFile.call(void 0, tsConfigPath, "utf8"); + } catch (err) { + console.error("Could not find project tsconfig.json"); + console.error(` --project=${options.project}`); + console.error(err); + process.exit(1); + } + const json = JSON.parse(str); + const sucraseOpts = options.sucraseOptions; + if (!sucraseOpts.transforms.includes("typescript")) { + sucraseOpts.transforms.push("typescript"); + } + + const compilerOpts = json.compilerOptions; + if (compilerOpts.outDir) { + options.outDirPath = _path.join.call(void 0, process.cwd(), options.project, compilerOpts.outDir); + } + if (compilerOpts.esModuleInterop !== true) { + sucraseOpts.enableLegacyTypeScriptModuleInterop = true; + } + if (compilerOpts.module === "commonjs") { + if (!sucraseOpts.transforms.includes("imports")) { + sucraseOpts.transforms.push("imports"); + } + } +} + +async function buildDirectory(options) { + let files; + if (options.outDirPath && options.srcDirPath) { + files = await findFiles(options); + } else if (options.project) { + await updateOptionsFromProject(options); + files = await runGlob(options); + } else { + console.error("Project or Source directory required."); + process.exit(1); + } + + for (const file of files) { + await buildFile(file.srcPath, file.outPath, options); + } +} + +async function buildFile(srcPath, outPath, options) { + if (!options.quiet) { + console.log(`${srcPath} -> ${outPath}`); + } + const code = (await _fs.readFile.call(void 0, srcPath)).toString(); + const transformedCode = _index.transform.call(void 0, code, {...options.sucraseOptions, filePath: srcPath}).code; + await _fs.writeFile.call(void 0, outPath, transformedCode); +} Index: frontend/node_modules/sucrase/dist/computeSourceMap.js =================================================================== --- frontend/node_modules/sucrase/dist/computeSourceMap.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/computeSourceMap.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,89 @@ +"use strict";Object.defineProperty(exports, "__esModule", {value: true});var _genmapping = require('@jridgewell/gen-mapping'); + + + +var _charcodes = require('./parser/util/charcodes'); + + + + + + + + + + + + +/** + * Generate a source map indicating that each line maps directly to the original line, + * with the tokens in their new positions. + */ + function computeSourceMap( + {code: generatedCode, mappings: rawMappings}, + filePath, + options, + source, + tokens, +) { + const sourceColumns = computeSourceColumns(source, tokens); + const map = new (0, _genmapping.GenMapping)({file: options.compiledFilename}); + let tokenIndex = 0; + // currentMapping is the output source index for the current input token being + // considered. + let currentMapping = rawMappings[0]; + while (currentMapping === undefined && tokenIndex < rawMappings.length - 1) { + tokenIndex++; + currentMapping = rawMappings[tokenIndex]; + } + let line = 0; + let lineStart = 0; + if (currentMapping !== lineStart) { + _genmapping.maybeAddSegment.call(void 0, map, line, 0, filePath, line, 0); + } + for (let i = 0; i < generatedCode.length; i++) { + if (i === currentMapping) { + const genColumn = currentMapping - lineStart; + const sourceColumn = sourceColumns[tokenIndex]; + _genmapping.maybeAddSegment.call(void 0, map, line, genColumn, filePath, line, sourceColumn); + while ( + (currentMapping === i || currentMapping === undefined) && + tokenIndex < rawMappings.length - 1 + ) { + tokenIndex++; + currentMapping = rawMappings[tokenIndex]; + } + } + if (generatedCode.charCodeAt(i) === _charcodes.charCodes.lineFeed) { + line++; + lineStart = i + 1; + if (currentMapping !== lineStart) { + _genmapping.maybeAddSegment.call(void 0, map, line, 0, filePath, line, 0); + } + } + } + const {sourceRoot, sourcesContent, ...sourceMap} = _genmapping.toEncodedMap.call(void 0, map); + return sourceMap ; +} exports.default = computeSourceMap; + +/** + * Create an array mapping each token index to the 0-based column of the start + * position of the token. + */ +function computeSourceColumns(code, tokens) { + const sourceColumns = new Array(tokens.length); + let tokenIndex = 0; + let currentMapping = tokens[tokenIndex].start; + let lineStart = 0; + for (let i = 0; i < code.length; i++) { + if (i === currentMapping) { + sourceColumns[tokenIndex] = currentMapping - lineStart; + tokenIndex++; + currentMapping = tokens[tokenIndex].start; + } + if (code.charCodeAt(i) === _charcodes.charCodes.lineFeed) { + lineStart = i + 1; + } + } + return sourceColumns; +} Index: frontend/node_modules/sucrase/dist/esm/CJSImportProcessor.js =================================================================== --- frontend/node_modules/sucrase/dist/esm/CJSImportProcessor.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/esm/CJSImportProcessor.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,456 @@ + + + +import {isDeclaration} from "./parser/tokenizer"; +import {ContextualKeyword} from "./parser/tokenizer/keywords"; +import {TokenType as tt} from "./parser/tokenizer/types"; + +import getImportExportSpecifierInfo from "./util/getImportExportSpecifierInfo"; +import {getNonTypeIdentifiers} from "./util/getNonTypeIdentifiers"; + + + + + + + + + + + + + + + + +/** + * Class responsible for preprocessing and bookkeeping import and export declarations within the + * file. + * + * TypeScript uses a simpler mechanism that does not use functions like interopRequireDefault and + * interopRequireWildcard, so we also allow that mode for compatibility. + */ +export default class CJSImportProcessor { + __init() {this.nonTypeIdentifiers = new Set()} + __init2() {this.importInfoByPath = new Map()} + __init3() {this.importsToReplace = new Map()} + __init4() {this.identifierReplacements = new Map()} + __init5() {this.exportBindingsByLocalName = new Map()} + + constructor( + nameManager, + tokens, + enableLegacyTypeScriptModuleInterop, + options, + isTypeScriptTransformEnabled, + keepUnusedImports, + helperManager, + ) {;this.nameManager = nameManager;this.tokens = tokens;this.enableLegacyTypeScriptModuleInterop = enableLegacyTypeScriptModuleInterop;this.options = options;this.isTypeScriptTransformEnabled = isTypeScriptTransformEnabled;this.keepUnusedImports = keepUnusedImports;this.helperManager = helperManager;CJSImportProcessor.prototype.__init.call(this);CJSImportProcessor.prototype.__init2.call(this);CJSImportProcessor.prototype.__init3.call(this);CJSImportProcessor.prototype.__init4.call(this);CJSImportProcessor.prototype.__init5.call(this);} + + preprocessTokens() { + for (let i = 0; i < this.tokens.tokens.length; i++) { + if ( + this.tokens.matches1AtIndex(i, tt._import) && + !this.tokens.matches3AtIndex(i, tt._import, tt.name, tt.eq) + ) { + this.preprocessImportAtIndex(i); + } + if ( + this.tokens.matches1AtIndex(i, tt._export) && + !this.tokens.matches2AtIndex(i, tt._export, tt.eq) + ) { + this.preprocessExportAtIndex(i); + } + } + this.generateImportReplacements(); + } + + /** + * In TypeScript, import statements that only import types should be removed. + * This includes `import {} from 'foo';`, but not `import 'foo';`. + */ + pruneTypeOnlyImports() { + this.nonTypeIdentifiers = getNonTypeIdentifiers(this.tokens, this.options); + for (const [path, importInfo] of this.importInfoByPath.entries()) { + if ( + importInfo.hasBareImport || + importInfo.hasStarExport || + importInfo.exportStarNames.length > 0 || + importInfo.namedExports.length > 0 + ) { + continue; + } + const names = [ + ...importInfo.defaultNames, + ...importInfo.wildcardNames, + ...importInfo.namedImports.map(({localName}) => localName), + ]; + if (names.every((name) => this.shouldAutomaticallyElideImportedName(name))) { + this.importsToReplace.set(path, ""); + } + } + } + + shouldAutomaticallyElideImportedName(name) { + return ( + this.isTypeScriptTransformEnabled && + !this.keepUnusedImports && + !this.nonTypeIdentifiers.has(name) + ); + } + + generateImportReplacements() { + for (const [path, importInfo] of this.importInfoByPath.entries()) { + const { + defaultNames, + wildcardNames, + namedImports, + namedExports, + exportStarNames, + hasStarExport, + } = importInfo; + + if ( + defaultNames.length === 0 && + wildcardNames.length === 0 && + namedImports.length === 0 && + namedExports.length === 0 && + exportStarNames.length === 0 && + !hasStarExport + ) { + // Import is never used, so don't even assign a name. + this.importsToReplace.set(path, `require('${path}');`); + continue; + } + + const primaryImportName = this.getFreeIdentifierForPath(path); + let secondaryImportName; + if (this.enableLegacyTypeScriptModuleInterop) { + secondaryImportName = primaryImportName; + } else { + secondaryImportName = + wildcardNames.length > 0 ? wildcardNames[0] : this.getFreeIdentifierForPath(path); + } + let requireCode = `var ${primaryImportName} = require('${path}');`; + if (wildcardNames.length > 0) { + for (const wildcardName of wildcardNames) { + const moduleExpr = this.enableLegacyTypeScriptModuleInterop + ? primaryImportName + : `${this.helperManager.getHelperName("interopRequireWildcard")}(${primaryImportName})`; + requireCode += ` var ${wildcardName} = ${moduleExpr};`; + } + } else if (exportStarNames.length > 0 && secondaryImportName !== primaryImportName) { + requireCode += ` var ${secondaryImportName} = ${this.helperManager.getHelperName( + "interopRequireWildcard", + )}(${primaryImportName});`; + } else if (defaultNames.length > 0 && secondaryImportName !== primaryImportName) { + requireCode += ` var ${secondaryImportName} = ${this.helperManager.getHelperName( + "interopRequireDefault", + )}(${primaryImportName});`; + } + + for (const {importedName, localName} of namedExports) { + requireCode += ` ${this.helperManager.getHelperName( + "createNamedExportFrom", + )}(${primaryImportName}, '${localName}', '${importedName}');`; + } + for (const exportStarName of exportStarNames) { + requireCode += ` exports.${exportStarName} = ${secondaryImportName};`; + } + if (hasStarExport) { + requireCode += ` ${this.helperManager.getHelperName( + "createStarExport", + )}(${primaryImportName});`; + } + + this.importsToReplace.set(path, requireCode); + + for (const defaultName of defaultNames) { + this.identifierReplacements.set(defaultName, `${secondaryImportName}.default`); + } + for (const {importedName, localName} of namedImports) { + this.identifierReplacements.set(localName, `${primaryImportName}.${importedName}`); + } + } + } + + getFreeIdentifierForPath(path) { + const components = path.split("/"); + const lastComponent = components[components.length - 1]; + const baseName = lastComponent.replace(/\W/g, ""); + return this.nameManager.claimFreeName(`_${baseName}`); + } + + preprocessImportAtIndex(index) { + const defaultNames = []; + const wildcardNames = []; + const namedImports = []; + + index++; + if ( + (this.tokens.matchesContextualAtIndex(index, ContextualKeyword._type) || + this.tokens.matches1AtIndex(index, tt._typeof)) && + !this.tokens.matches1AtIndex(index + 1, tt.comma) && + !this.tokens.matchesContextualAtIndex(index + 1, ContextualKeyword._from) + ) { + // import type declaration, so no need to process anything. + return; + } + + if (this.tokens.matches1AtIndex(index, tt.parenL)) { + // Dynamic import, so nothing to do + return; + } + + if (this.tokens.matches1AtIndex(index, tt.name)) { + defaultNames.push(this.tokens.identifierNameAtIndex(index)); + index++; + if (this.tokens.matches1AtIndex(index, tt.comma)) { + index++; + } + } + + if (this.tokens.matches1AtIndex(index, tt.star)) { + // * as + index += 2; + wildcardNames.push(this.tokens.identifierNameAtIndex(index)); + index++; + } + + if (this.tokens.matches1AtIndex(index, tt.braceL)) { + const result = this.getNamedImports(index + 1); + index = result.newIndex; + + for (const namedImport of result.namedImports) { + // Treat {default as X} as a default import to ensure usage of require interop helper + if (namedImport.importedName === "default") { + defaultNames.push(namedImport.localName); + } else { + namedImports.push(namedImport); + } + } + } + + if (this.tokens.matchesContextualAtIndex(index, ContextualKeyword._from)) { + index++; + } + + if (!this.tokens.matches1AtIndex(index, tt.string)) { + throw new Error("Expected string token at the end of import statement."); + } + const path = this.tokens.stringValueAtIndex(index); + const importInfo = this.getImportInfo(path); + importInfo.defaultNames.push(...defaultNames); + importInfo.wildcardNames.push(...wildcardNames); + importInfo.namedImports.push(...namedImports); + if (defaultNames.length === 0 && wildcardNames.length === 0 && namedImports.length === 0) { + importInfo.hasBareImport = true; + } + } + + preprocessExportAtIndex(index) { + if ( + this.tokens.matches2AtIndex(index, tt._export, tt._var) || + this.tokens.matches2AtIndex(index, tt._export, tt._let) || + this.tokens.matches2AtIndex(index, tt._export, tt._const) + ) { + this.preprocessVarExportAtIndex(index); + } else if ( + this.tokens.matches2AtIndex(index, tt._export, tt._function) || + this.tokens.matches2AtIndex(index, tt._export, tt._class) + ) { + const exportName = this.tokens.identifierNameAtIndex(index + 2); + this.addExportBinding(exportName, exportName); + } else if (this.tokens.matches3AtIndex(index, tt._export, tt.name, tt._function)) { + const exportName = this.tokens.identifierNameAtIndex(index + 3); + this.addExportBinding(exportName, exportName); + } else if (this.tokens.matches2AtIndex(index, tt._export, tt.braceL)) { + this.preprocessNamedExportAtIndex(index); + } else if (this.tokens.matches2AtIndex(index, tt._export, tt.star)) { + this.preprocessExportStarAtIndex(index); + } + } + + preprocessVarExportAtIndex(index) { + let depth = 0; + // Handle cases like `export let {x} = y;`, starting at the open-brace in that case. + for (let i = index + 2; ; i++) { + if ( + this.tokens.matches1AtIndex(i, tt.braceL) || + this.tokens.matches1AtIndex(i, tt.dollarBraceL) || + this.tokens.matches1AtIndex(i, tt.bracketL) + ) { + depth++; + } else if ( + this.tokens.matches1AtIndex(i, tt.braceR) || + this.tokens.matches1AtIndex(i, tt.bracketR) + ) { + depth--; + } else if (depth === 0 && !this.tokens.matches1AtIndex(i, tt.name)) { + break; + } else if (this.tokens.matches1AtIndex(1, tt.eq)) { + const endIndex = this.tokens.currentToken().rhsEndIndex; + if (endIndex == null) { + throw new Error("Expected = token with an end index."); + } + i = endIndex - 1; + } else { + const token = this.tokens.tokens[i]; + if (isDeclaration(token)) { + const exportName = this.tokens.identifierNameAtIndex(i); + this.identifierReplacements.set(exportName, `exports.${exportName}`); + } + } + } + } + + /** + * Walk this export statement just in case it's an export...from statement. + * If it is, combine it into the import info for that path. Otherwise, just + * bail out; it'll be handled later. + */ + preprocessNamedExportAtIndex(index) { + // export { + index += 2; + const {newIndex, namedImports} = this.getNamedImports(index); + index = newIndex; + + if (this.tokens.matchesContextualAtIndex(index, ContextualKeyword._from)) { + index++; + } else { + // Reinterpret "a as b" to be local/exported rather than imported/local. + for (const {importedName: localName, localName: exportedName} of namedImports) { + this.addExportBinding(localName, exportedName); + } + return; + } + + if (!this.tokens.matches1AtIndex(index, tt.string)) { + throw new Error("Expected string token at the end of import statement."); + } + const path = this.tokens.stringValueAtIndex(index); + const importInfo = this.getImportInfo(path); + importInfo.namedExports.push(...namedImports); + } + + preprocessExportStarAtIndex(index) { + let exportedName = null; + if (this.tokens.matches3AtIndex(index, tt._export, tt.star, tt._as)) { + // export * as + index += 3; + exportedName = this.tokens.identifierNameAtIndex(index); + // foo from + index += 2; + } else { + // export * from + index += 3; + } + if (!this.tokens.matches1AtIndex(index, tt.string)) { + throw new Error("Expected string token at the end of star export statement."); + } + const path = this.tokens.stringValueAtIndex(index); + const importInfo = this.getImportInfo(path); + if (exportedName !== null) { + importInfo.exportStarNames.push(exportedName); + } else { + importInfo.hasStarExport = true; + } + } + + getNamedImports(index) { + const namedImports = []; + while (true) { + if (this.tokens.matches1AtIndex(index, tt.braceR)) { + index++; + break; + } + + const specifierInfo = getImportExportSpecifierInfo(this.tokens, index); + index = specifierInfo.endIndex; + if (!specifierInfo.isType) { + namedImports.push({ + importedName: specifierInfo.leftName, + localName: specifierInfo.rightName, + }); + } + + if (this.tokens.matches2AtIndex(index, tt.comma, tt.braceR)) { + index += 2; + break; + } else if (this.tokens.matches1AtIndex(index, tt.braceR)) { + index++; + break; + } else if (this.tokens.matches1AtIndex(index, tt.comma)) { + index++; + } else { + throw new Error(`Unexpected token: ${JSON.stringify(this.tokens.tokens[index])}`); + } + } + return {newIndex: index, namedImports}; + } + + /** + * Get a mutable import info object for this path, creating one if it doesn't + * exist yet. + */ + getImportInfo(path) { + const existingInfo = this.importInfoByPath.get(path); + if (existingInfo) { + return existingInfo; + } + const newInfo = { + defaultNames: [], + wildcardNames: [], + namedImports: [], + namedExports: [], + hasBareImport: false, + exportStarNames: [], + hasStarExport: false, + }; + this.importInfoByPath.set(path, newInfo); + return newInfo; + } + + addExportBinding(localName, exportedName) { + if (!this.exportBindingsByLocalName.has(localName)) { + this.exportBindingsByLocalName.set(localName, []); + } + this.exportBindingsByLocalName.get(localName).push(exportedName); + } + + /** + * Return the code to use for the import for this path, or the empty string if + * the code has already been "claimed" by a previous import. + */ + claimImportCode(importPath) { + const result = this.importsToReplace.get(importPath); + this.importsToReplace.set(importPath, ""); + return result || ""; + } + + getIdentifierReplacement(identifierName) { + return this.identifierReplacements.get(identifierName) || null; + } + + /** + * Return a string like `exports.foo = exports.bar`. + */ + resolveExportBinding(assignedName) { + const exportedNames = this.exportBindingsByLocalName.get(assignedName); + if (!exportedNames || exportedNames.length === 0) { + return null; + } + return exportedNames.map((exportedName) => `exports.${exportedName}`).join(" = "); + } + + /** + * Return all imported/exported names where we might be interested in whether usages of those + * names are shadowed. + */ + getGlobalNames() { + return new Set([ + ...this.identifierReplacements.keys(), + ...this.exportBindingsByLocalName.keys(), + ]); + } +} Index: frontend/node_modules/sucrase/dist/esm/HelperManager.js =================================================================== --- frontend/node_modules/sucrase/dist/esm/HelperManager.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/esm/HelperManager.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,176 @@ + + +const HELPERS = { + require: ` + import {createRequire as CREATE_REQUIRE_NAME} from "module"; + const require = CREATE_REQUIRE_NAME(import.meta.url); + `, + interopRequireWildcard: ` + function interopRequireWildcard(obj) { + if (obj && obj.__esModule) { + return obj; + } else { + var newObj = {}; + if (obj != null) { + for (var key in obj) { + if (Object.prototype.hasOwnProperty.call(obj, key)) { + newObj[key] = obj[key]; + } + } + } + newObj.default = obj; + return newObj; + } + } + `, + interopRequireDefault: ` + function interopRequireDefault(obj) { + return obj && obj.__esModule ? obj : { default: obj }; + } + `, + createNamedExportFrom: ` + function createNamedExportFrom(obj, localName, importedName) { + Object.defineProperty(exports, localName, {enumerable: true, configurable: true, get: () => obj[importedName]}); + } + `, + // Note that TypeScript and Babel do this differently; TypeScript does a simple existence + // check in the exports object and does a plain assignment, whereas Babel uses + // defineProperty and builds an object of explicitly-exported names so that star exports can + // always take lower precedence. For now, we do the easier TypeScript thing. + createStarExport: ` + function createStarExport(obj) { + Object.keys(obj) + .filter((key) => key !== "default" && key !== "__esModule") + .forEach((key) => { + if (exports.hasOwnProperty(key)) { + return; + } + Object.defineProperty(exports, key, {enumerable: true, configurable: true, get: () => obj[key]}); + }); + } + `, + nullishCoalesce: ` + function nullishCoalesce(lhs, rhsFn) { + if (lhs != null) { + return lhs; + } else { + return rhsFn(); + } + } + `, + asyncNullishCoalesce: ` + async function asyncNullishCoalesce(lhs, rhsFn) { + if (lhs != null) { + return lhs; + } else { + return await rhsFn(); + } + } + `, + optionalChain: ` + function optionalChain(ops) { + let lastAccessLHS = undefined; + let value = ops[0]; + let i = 1; + while (i < ops.length) { + const op = ops[i]; + const fn = ops[i + 1]; + i += 2; + if ((op === 'optionalAccess' || op === 'optionalCall') && value == null) { + return undefined; + } + if (op === 'access' || op === 'optionalAccess') { + lastAccessLHS = value; + value = fn(value); + } else if (op === 'call' || op === 'optionalCall') { + value = fn((...args) => value.call(lastAccessLHS, ...args)); + lastAccessLHS = undefined; + } + } + return value; + } + `, + asyncOptionalChain: ` + async function asyncOptionalChain(ops) { + let lastAccessLHS = undefined; + let value = ops[0]; + let i = 1; + while (i < ops.length) { + const op = ops[i]; + const fn = ops[i + 1]; + i += 2; + if ((op === 'optionalAccess' || op === 'optionalCall') && value == null) { + return undefined; + } + if (op === 'access' || op === 'optionalAccess') { + lastAccessLHS = value; + value = await fn(value); + } else if (op === 'call' || op === 'optionalCall') { + value = await fn((...args) => value.call(lastAccessLHS, ...args)); + lastAccessLHS = undefined; + } + } + return value; + } + `, + optionalChainDelete: ` + function optionalChainDelete(ops) { + const result = OPTIONAL_CHAIN_NAME(ops); + return result == null ? true : result; + } + `, + asyncOptionalChainDelete: ` + async function asyncOptionalChainDelete(ops) { + const result = await ASYNC_OPTIONAL_CHAIN_NAME(ops); + return result == null ? true : result; + } + `, +}; + +export class HelperManager { + __init() {this.helperNames = {}} + __init2() {this.createRequireName = null} + constructor( nameManager) {;this.nameManager = nameManager;HelperManager.prototype.__init.call(this);HelperManager.prototype.__init2.call(this);} + + getHelperName(baseName) { + let helperName = this.helperNames[baseName]; + if (helperName) { + return helperName; + } + helperName = this.nameManager.claimFreeName(`_${baseName}`); + this.helperNames[baseName] = helperName; + return helperName; + } + + emitHelpers() { + let resultCode = ""; + if (this.helperNames.optionalChainDelete) { + this.getHelperName("optionalChain"); + } + if (this.helperNames.asyncOptionalChainDelete) { + this.getHelperName("asyncOptionalChain"); + } + for (const [baseName, helperCodeTemplate] of Object.entries(HELPERS)) { + const helperName = this.helperNames[baseName]; + let helperCode = helperCodeTemplate; + if (baseName === "optionalChainDelete") { + helperCode = helperCode.replace("OPTIONAL_CHAIN_NAME", this.helperNames.optionalChain); + } else if (baseName === "asyncOptionalChainDelete") { + helperCode = helperCode.replace( + "ASYNC_OPTIONAL_CHAIN_NAME", + this.helperNames.asyncOptionalChain, + ); + } else if (baseName === "require") { + if (this.createRequireName === null) { + this.createRequireName = this.nameManager.claimFreeName("_createRequire"); + } + helperCode = helperCode.replace(/CREATE_REQUIRE_NAME/g, this.createRequireName); + } + if (helperName) { + resultCode += " "; + resultCode += helperCode.replace(baseName, helperName).replace(/\s+/g, " ").trim(); + } + } + return resultCode; + } +} Index: frontend/node_modules/sucrase/dist/esm/NameManager.js =================================================================== --- frontend/node_modules/sucrase/dist/esm/NameManager.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/esm/NameManager.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,27 @@ + +import getIdentifierNames from "./util/getIdentifierNames"; + +export default class NameManager { + __init() {this.usedNames = new Set()} + + constructor(code, tokens) {;NameManager.prototype.__init.call(this); + this.usedNames = new Set(getIdentifierNames(code, tokens)); + } + + claimFreeName(name) { + const newName = this.findFreeName(name); + this.usedNames.add(newName); + return newName; + } + + findFreeName(name) { + if (!this.usedNames.has(name)) { + return name; + } + let suffixNum = 2; + while (this.usedNames.has(name + String(suffixNum))) { + suffixNum++; + } + return name + String(suffixNum); + } +} Index: frontend/node_modules/sucrase/dist/esm/Options-gen-types.js =================================================================== --- frontend/node_modules/sucrase/dist/esm/Options-gen-types.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/esm/Options-gen-types.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,42 @@ +/** + * This module was automatically generated by `ts-interface-builder` + */ +import * as t from "ts-interface-checker"; +// tslint:disable:object-literal-key-quotes + +export const Transform = t.union( + t.lit("jsx"), + t.lit("typescript"), + t.lit("flow"), + t.lit("imports"), + t.lit("react-hot-loader"), + t.lit("jest"), +); + +export const SourceMapOptions = t.iface([], { + compiledFilename: "string", +}); + +export const Options = t.iface([], { + transforms: t.array("Transform"), + disableESTransforms: t.opt("boolean"), + jsxRuntime: t.opt(t.union(t.lit("classic"), t.lit("automatic"), t.lit("preserve"))), + production: t.opt("boolean"), + jsxImportSource: t.opt("string"), + jsxPragma: t.opt("string"), + jsxFragmentPragma: t.opt("string"), + keepUnusedImports: t.opt("boolean"), + preserveDynamicImport: t.opt("boolean"), + injectCreateRequireForImportRequire: t.opt("boolean"), + enableLegacyTypeScriptModuleInterop: t.opt("boolean"), + enableLegacyBabel5ModuleInterop: t.opt("boolean"), + sourceMapOptions: t.opt("SourceMapOptions"), + filePath: t.opt("string"), +}); + +const exportedTypeSuite = { + Transform, + SourceMapOptions, + Options, +}; +export default exportedTypeSuite; Index: frontend/node_modules/sucrase/dist/esm/Options.js =================================================================== --- frontend/node_modules/sucrase/dist/esm/Options.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/esm/Options.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,101 @@ +import {createCheckers} from "ts-interface-checker"; + +import OptionsGenTypes from "./Options-gen-types"; + +const {Options: OptionsChecker} = createCheckers(OptionsGenTypes); + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +export function validateOptions(options) { + OptionsChecker.strictCheck(options); +} Index: frontend/node_modules/sucrase/dist/esm/TokenProcessor.js =================================================================== --- frontend/node_modules/sucrase/dist/esm/TokenProcessor.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/esm/TokenProcessor.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,357 @@ + + + +import { TokenType as tt} from "./parser/tokenizer/types"; +import isAsyncOperation from "./util/isAsyncOperation"; + + + + + + + + + + + +export default class TokenProcessor { + __init() {this.resultCode = ""} + // Array mapping input token index to optional string index position in the + // output code. + __init2() {this.resultMappings = new Array(this.tokens.length)} + __init3() {this.tokenIndex = 0} + + constructor( + code, + tokens, + isFlowEnabled, + disableESTransforms, + helperManager, + ) {;this.code = code;this.tokens = tokens;this.isFlowEnabled = isFlowEnabled;this.disableESTransforms = disableESTransforms;this.helperManager = helperManager;TokenProcessor.prototype.__init.call(this);TokenProcessor.prototype.__init2.call(this);TokenProcessor.prototype.__init3.call(this);} + + /** + * Snapshot the token state in a way that can be restored later, useful for + * things like lookahead. + * + * resultMappings do not need to be copied since in all use cases, they will + * be overwritten anyway after restore. + */ + snapshot() { + return { + resultCode: this.resultCode, + tokenIndex: this.tokenIndex, + }; + } + + restoreToSnapshot(snapshot) { + this.resultCode = snapshot.resultCode; + this.tokenIndex = snapshot.tokenIndex; + } + + /** + * Remove and return the code generated since the snapshot, leaving the + * current token position in-place. Unlike most TokenProcessor operations, + * this operation can result in input/output line number mismatches because + * the removed code may contain newlines, so this operation should be used + * sparingly. + */ + dangerouslyGetAndRemoveCodeSinceSnapshot(snapshot) { + const result = this.resultCode.slice(snapshot.resultCode.length); + this.resultCode = snapshot.resultCode; + return result; + } + + reset() { + this.resultCode = ""; + this.resultMappings = new Array(this.tokens.length); + this.tokenIndex = 0; + } + + matchesContextualAtIndex(index, contextualKeyword) { + return ( + this.matches1AtIndex(index, tt.name) && + this.tokens[index].contextualKeyword === contextualKeyword + ); + } + + identifierNameAtIndex(index) { + // TODO: We need to process escapes since technically you can have unicode escapes in variable + // names. + return this.identifierNameForToken(this.tokens[index]); + } + + identifierNameAtRelativeIndex(relativeIndex) { + return this.identifierNameForToken(this.tokenAtRelativeIndex(relativeIndex)); + } + + identifierName() { + return this.identifierNameForToken(this.currentToken()); + } + + identifierNameForToken(token) { + return this.code.slice(token.start, token.end); + } + + rawCodeForToken(token) { + return this.code.slice(token.start, token.end); + } + + stringValueAtIndex(index) { + return this.stringValueForToken(this.tokens[index]); + } + + stringValue() { + return this.stringValueForToken(this.currentToken()); + } + + stringValueForToken(token) { + // This is used to identify when two imports are the same and to resolve TypeScript enum keys. + // Ideally we'd process escapes within the strings, but for now we pretty much take the raw + // code. + return this.code.slice(token.start + 1, token.end - 1); + } + + matches1AtIndex(index, t1) { + return this.tokens[index].type === t1; + } + + matches2AtIndex(index, t1, t2) { + return this.tokens[index].type === t1 && this.tokens[index + 1].type === t2; + } + + matches3AtIndex(index, t1, t2, t3) { + return ( + this.tokens[index].type === t1 && + this.tokens[index + 1].type === t2 && + this.tokens[index + 2].type === t3 + ); + } + + matches1(t1) { + return this.tokens[this.tokenIndex].type === t1; + } + + matches2(t1, t2) { + return this.tokens[this.tokenIndex].type === t1 && this.tokens[this.tokenIndex + 1].type === t2; + } + + matches3(t1, t2, t3) { + return ( + this.tokens[this.tokenIndex].type === t1 && + this.tokens[this.tokenIndex + 1].type === t2 && + this.tokens[this.tokenIndex + 2].type === t3 + ); + } + + matches4(t1, t2, t3, t4) { + return ( + this.tokens[this.tokenIndex].type === t1 && + this.tokens[this.tokenIndex + 1].type === t2 && + this.tokens[this.tokenIndex + 2].type === t3 && + this.tokens[this.tokenIndex + 3].type === t4 + ); + } + + matches5(t1, t2, t3, t4, t5) { + return ( + this.tokens[this.tokenIndex].type === t1 && + this.tokens[this.tokenIndex + 1].type === t2 && + this.tokens[this.tokenIndex + 2].type === t3 && + this.tokens[this.tokenIndex + 3].type === t4 && + this.tokens[this.tokenIndex + 4].type === t5 + ); + } + + matchesContextual(contextualKeyword) { + return this.matchesContextualAtIndex(this.tokenIndex, contextualKeyword); + } + + matchesContextIdAndLabel(type, contextId) { + return this.matches1(type) && this.currentToken().contextId === contextId; + } + + previousWhitespaceAndComments() { + let whitespaceAndComments = this.code.slice( + this.tokenIndex > 0 ? this.tokens[this.tokenIndex - 1].end : 0, + this.tokenIndex < this.tokens.length ? this.tokens[this.tokenIndex].start : this.code.length, + ); + if (this.isFlowEnabled) { + whitespaceAndComments = whitespaceAndComments.replace(/@flow/g, ""); + } + return whitespaceAndComments; + } + + replaceToken(newCode) { + this.resultCode += this.previousWhitespaceAndComments(); + this.appendTokenPrefix(); + this.resultMappings[this.tokenIndex] = this.resultCode.length; + this.resultCode += newCode; + this.appendTokenSuffix(); + this.tokenIndex++; + } + + replaceTokenTrimmingLeftWhitespace(newCode) { + this.resultCode += this.previousWhitespaceAndComments().replace(/[^\r\n]/g, ""); + this.appendTokenPrefix(); + this.resultMappings[this.tokenIndex] = this.resultCode.length; + this.resultCode += newCode; + this.appendTokenSuffix(); + this.tokenIndex++; + } + + removeInitialToken() { + this.replaceToken(""); + } + + removeToken() { + this.replaceTokenTrimmingLeftWhitespace(""); + } + + /** + * Remove all code until the next }, accounting for balanced braces. + */ + removeBalancedCode() { + let braceDepth = 0; + while (!this.isAtEnd()) { + if (this.matches1(tt.braceL)) { + braceDepth++; + } else if (this.matches1(tt.braceR)) { + if (braceDepth === 0) { + return; + } + braceDepth--; + } + this.removeToken(); + } + } + + copyExpectedToken(tokenType) { + if (this.tokens[this.tokenIndex].type !== tokenType) { + throw new Error(`Expected token ${tokenType}`); + } + this.copyToken(); + } + + copyToken() { + this.resultCode += this.previousWhitespaceAndComments(); + this.appendTokenPrefix(); + this.resultMappings[this.tokenIndex] = this.resultCode.length; + this.resultCode += this.code.slice( + this.tokens[this.tokenIndex].start, + this.tokens[this.tokenIndex].end, + ); + this.appendTokenSuffix(); + this.tokenIndex++; + } + + copyTokenWithPrefix(prefix) { + this.resultCode += this.previousWhitespaceAndComments(); + this.appendTokenPrefix(); + this.resultCode += prefix; + this.resultMappings[this.tokenIndex] = this.resultCode.length; + this.resultCode += this.code.slice( + this.tokens[this.tokenIndex].start, + this.tokens[this.tokenIndex].end, + ); + this.appendTokenSuffix(); + this.tokenIndex++; + } + + appendTokenPrefix() { + const token = this.currentToken(); + if (token.numNullishCoalesceStarts || token.isOptionalChainStart) { + token.isAsyncOperation = isAsyncOperation(this); + } + if (this.disableESTransforms) { + return; + } + if (token.numNullishCoalesceStarts) { + for (let i = 0; i < token.numNullishCoalesceStarts; i++) { + if (token.isAsyncOperation) { + this.resultCode += "await "; + this.resultCode += this.helperManager.getHelperName("asyncNullishCoalesce"); + } else { + this.resultCode += this.helperManager.getHelperName("nullishCoalesce"); + } + this.resultCode += "("; + } + } + if (token.isOptionalChainStart) { + if (token.isAsyncOperation) { + this.resultCode += "await "; + } + if (this.tokenIndex > 0 && this.tokenAtRelativeIndex(-1).type === tt._delete) { + if (token.isAsyncOperation) { + this.resultCode += this.helperManager.getHelperName("asyncOptionalChainDelete"); + } else { + this.resultCode += this.helperManager.getHelperName("optionalChainDelete"); + } + } else if (token.isAsyncOperation) { + this.resultCode += this.helperManager.getHelperName("asyncOptionalChain"); + } else { + this.resultCode += this.helperManager.getHelperName("optionalChain"); + } + this.resultCode += "(["; + } + } + + appendTokenSuffix() { + const token = this.currentToken(); + if (token.isOptionalChainEnd && !this.disableESTransforms) { + this.resultCode += "])"; + } + if (token.numNullishCoalesceEnds && !this.disableESTransforms) { + for (let i = 0; i < token.numNullishCoalesceEnds; i++) { + this.resultCode += "))"; + } + } + } + + appendCode(code) { + this.resultCode += code; + } + + currentToken() { + return this.tokens[this.tokenIndex]; + } + + currentTokenCode() { + const token = this.currentToken(); + return this.code.slice(token.start, token.end); + } + + tokenAtRelativeIndex(relativeIndex) { + return this.tokens[this.tokenIndex + relativeIndex]; + } + + currentIndex() { + return this.tokenIndex; + } + + /** + * Move to the next token. Only suitable in preprocessing steps. When + * generating new code, you should use copyToken or removeToken. + */ + nextToken() { + if (this.tokenIndex === this.tokens.length) { + throw new Error("Unexpectedly reached end of input."); + } + this.tokenIndex++; + } + + previousToken() { + this.tokenIndex--; + } + + finish() { + if (this.tokenIndex !== this.tokens.length) { + throw new Error("Tried to finish processing tokens before reaching the end."); + } + this.resultCode += this.previousWhitespaceAndComments(); + return {code: this.resultCode, mappings: this.resultMappings}; + } + + isAtEnd() { + return this.tokenIndex === this.tokens.length; + } +} Index: frontend/node_modules/sucrase/dist/esm/cli.js =================================================================== --- frontend/node_modules/sucrase/dist/esm/cli.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/esm/cli.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,317 @@ +/* eslint-disable no-console */ +import commander from "commander"; +import {glob} from "tinyglobby"; +import {exists, mkdir, readdir, readFile, stat, writeFile} from "mz/fs"; +import {dirname, join, relative} from "path"; + +import { transform} from "./index"; + + + + + + + + + + + +export default function run() { + commander + .description(`Sucrase: super-fast Babel alternative.`) + .usage("[options] ") + .option( + "-d, --out-dir ", + "Compile an input directory of modules into an output directory.", + ) + .option( + "-p, --project ", + "Compile a TypeScript project, will read from tsconfig.json in ", + ) + .option("--out-extension ", "File extension to use for all output files.", "js") + .option("--exclude-dirs ", "Names of directories that should not be traversed.") + .option("-q, --quiet", "Don't print the names of converted files.") + .option("-t, --transforms ", "Comma-separated list of transforms to run.") + .option("--disable-es-transforms", "Opt out of all ES syntax transforms.") + .option("--jsx-runtime ", "Transformation mode for the JSX transform.") + .option("--production", "Disable debugging information from JSX in output.") + .option( + "--jsx-import-source ", + "Automatic JSX transform import path prefix, defaults to `React.Fragment`.", + ) + .option( + "--jsx-pragma ", + "Classic JSX transform element creation function, defaults to `React.createElement`.", + ) + .option( + "--jsx-fragment-pragma ", + "Classic JSX transform fragment component, defaults to `React.Fragment`.", + ) + .option("--keep-unused-imports", "Disable automatic removal of type-only imports/exports.") + .option("--preserve-dynamic-import", "Don't transpile dynamic import() to require.") + .option( + "--inject-create-require-for-import-require", + "Use `createRequire` when transpiling TS `import = require` to ESM.", + ) + .option( + "--enable-legacy-typescript-module-interop", + "Use default TypeScript ESM/CJS interop strategy.", + ) + .option("--enable-legacy-babel5-module-interop", "Use Babel 5 ESM/CJS interop strategy.") + .parse(process.argv); + + if (commander.project) { + if ( + commander.outDir || + commander.transforms || + commander.args[0] || + commander.enableLegacyTypescriptModuleInterop + ) { + console.error( + "If TypeScript project is specified, out directory, transforms, source " + + "directory, and --enable-legacy-typescript-module-interop may not be specified.", + ); + process.exit(1); + } + } else { + if (!commander.outDir) { + console.error("Out directory is required"); + process.exit(1); + } + + if (!commander.transforms) { + console.error("Transforms option is required."); + process.exit(1); + } + + if (!commander.args[0]) { + console.error("Source directory is required."); + process.exit(1); + } + } + + const options = { + outDirPath: commander.outDir, + srcDirPath: commander.args[0], + project: commander.project, + outExtension: commander.outExtension, + excludeDirs: commander.excludeDirs ? commander.excludeDirs.split(",") : [], + quiet: commander.quiet, + sucraseOptions: { + transforms: commander.transforms ? commander.transforms.split(",") : [], + disableESTransforms: commander.disableEsTransforms, + jsxRuntime: commander.jsxRuntime, + production: commander.production, + jsxImportSource: commander.jsxImportSource, + jsxPragma: commander.jsxPragma || "React.createElement", + jsxFragmentPragma: commander.jsxFragmentPragma || "React.Fragment", + keepUnusedImports: commander.keepUnusedImports, + preserveDynamicImport: commander.preserveDynamicImport, + injectCreateRequireForImportRequire: commander.injectCreateRequireForImportRequire, + enableLegacyTypeScriptModuleInterop: commander.enableLegacyTypescriptModuleInterop, + enableLegacyBabel5ModuleInterop: commander.enableLegacyBabel5ModuleInterop, + }, + }; + + buildDirectory(options).catch((e) => { + process.exitCode = 1; + console.error(e); + }); +} + + + + + + +async function findFiles(options) { + const outDirPath = options.outDirPath; + const srcDirPath = options.srcDirPath; + + const extensions = options.sucraseOptions.transforms.includes("typescript") + ? [".ts", ".tsx"] + : [".js", ".jsx"]; + + if (!(await exists(outDirPath))) { + await mkdir(outDirPath); + } + + const outArr = []; + for (const child of await readdir(srcDirPath)) { + if (["node_modules", ".git"].includes(child) || options.excludeDirs.includes(child)) { + continue; + } + const srcChildPath = join(srcDirPath, child); + const outChildPath = join(outDirPath, child); + if ((await stat(srcChildPath)).isDirectory()) { + const innerOptions = {...options}; + innerOptions.srcDirPath = srcChildPath; + innerOptions.outDirPath = outChildPath; + const innerFiles = await findFiles(innerOptions); + outArr.push(...innerFiles); + } else if (extensions.some((ext) => srcChildPath.endsWith(ext))) { + const outPath = outChildPath.replace(/\.\w+$/, `.${options.outExtension}`); + outArr.push({ + srcPath: srcChildPath, + outPath, + }); + } + } + + return outArr; +} + +async function runGlob(options) { + const tsConfigPath = join(options.project, "tsconfig.json"); + + let str; + try { + str = await readFile(tsConfigPath, "utf8"); + } catch (err) { + console.error("Could not find project tsconfig.json"); + console.error(` --project=${options.project}`); + console.error(err); + process.exit(1); + } + const json = JSON.parse(str); + + const foundFiles = []; + + const files = json.files; + const include = json.include; + + const absProject = join(process.cwd(), options.project); + const outDirs = []; + + if (!(await exists(options.outDirPath))) { + await mkdir(options.outDirPath); + } + + if (files) { + for (const file of files) { + if (file.endsWith(".d.ts")) { + continue; + } + if (!file.endsWith(".ts") && !file.endsWith(".js")) { + continue; + } + + const srcFile = join(absProject, file); + const outFile = join(options.outDirPath, file); + const outPath = outFile.replace(/\.\w+$/, `.${options.outExtension}`); + + const outDir = dirname(outPath); + if (!outDirs.includes(outDir)) { + outDirs.push(outDir); + } + + foundFiles.push({ + srcPath: srcFile, + outPath, + }); + } + } + if (include) { + for (const pattern of include) { + const globFiles = await glob(join(absProject, pattern), {expandDirectories: false}); + for (const file of globFiles) { + if (!file.endsWith(".ts") && !file.endsWith(".js")) { + continue; + } + if (file.endsWith(".d.ts")) { + continue; + } + + const relativeFile = relative(absProject, file); + const outFile = join(options.outDirPath, relativeFile); + const outPath = outFile.replace(/\.\w+$/, `.${options.outExtension}`); + + const outDir = dirname(outPath); + if (!outDirs.includes(outDir)) { + outDirs.push(outDir); + } + + foundFiles.push({ + srcPath: file, + outPath, + }); + } + } + } + + for (const outDirPath of outDirs) { + if (!(await exists(outDirPath))) { + await mkdir(outDirPath); + } + } + + // TODO: read exclude + + return foundFiles; +} + +async function updateOptionsFromProject(options) { + /** + * Read the project information and assign the following. + * - outDirPath + * - transform: imports + * - transform: typescript + * - enableLegacyTypescriptModuleInterop: true/false. + */ + + const tsConfigPath = join(options.project, "tsconfig.json"); + + let str; + try { + str = await readFile(tsConfigPath, "utf8"); + } catch (err) { + console.error("Could not find project tsconfig.json"); + console.error(` --project=${options.project}`); + console.error(err); + process.exit(1); + } + const json = JSON.parse(str); + const sucraseOpts = options.sucraseOptions; + if (!sucraseOpts.transforms.includes("typescript")) { + sucraseOpts.transforms.push("typescript"); + } + + const compilerOpts = json.compilerOptions; + if (compilerOpts.outDir) { + options.outDirPath = join(process.cwd(), options.project, compilerOpts.outDir); + } + if (compilerOpts.esModuleInterop !== true) { + sucraseOpts.enableLegacyTypeScriptModuleInterop = true; + } + if (compilerOpts.module === "commonjs") { + if (!sucraseOpts.transforms.includes("imports")) { + sucraseOpts.transforms.push("imports"); + } + } +} + +async function buildDirectory(options) { + let files; + if (options.outDirPath && options.srcDirPath) { + files = await findFiles(options); + } else if (options.project) { + await updateOptionsFromProject(options); + files = await runGlob(options); + } else { + console.error("Project or Source directory required."); + process.exit(1); + } + + for (const file of files) { + await buildFile(file.srcPath, file.outPath, options); + } +} + +async function buildFile(srcPath, outPath, options) { + if (!options.quiet) { + console.log(`${srcPath} -> ${outPath}`); + } + const code = (await readFile(srcPath)).toString(); + const transformedCode = transform(code, {...options.sucraseOptions, filePath: srcPath}).code; + await writeFile(outPath, transformedCode); +} Index: frontend/node_modules/sucrase/dist/esm/computeSourceMap.js =================================================================== --- frontend/node_modules/sucrase/dist/esm/computeSourceMap.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/esm/computeSourceMap.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,89 @@ +import {GenMapping, maybeAddSegment, toEncodedMap} from "@jridgewell/gen-mapping"; + + + +import {charCodes} from "./parser/util/charcodes"; + + + + + + + + + + + + +/** + * Generate a source map indicating that each line maps directly to the original line, + * with the tokens in their new positions. + */ +export default function computeSourceMap( + {code: generatedCode, mappings: rawMappings}, + filePath, + options, + source, + tokens, +) { + const sourceColumns = computeSourceColumns(source, tokens); + const map = new GenMapping({file: options.compiledFilename}); + let tokenIndex = 0; + // currentMapping is the output source index for the current input token being + // considered. + let currentMapping = rawMappings[0]; + while (currentMapping === undefined && tokenIndex < rawMappings.length - 1) { + tokenIndex++; + currentMapping = rawMappings[tokenIndex]; + } + let line = 0; + let lineStart = 0; + if (currentMapping !== lineStart) { + maybeAddSegment(map, line, 0, filePath, line, 0); + } + for (let i = 0; i < generatedCode.length; i++) { + if (i === currentMapping) { + const genColumn = currentMapping - lineStart; + const sourceColumn = sourceColumns[tokenIndex]; + maybeAddSegment(map, line, genColumn, filePath, line, sourceColumn); + while ( + (currentMapping === i || currentMapping === undefined) && + tokenIndex < rawMappings.length - 1 + ) { + tokenIndex++; + currentMapping = rawMappings[tokenIndex]; + } + } + if (generatedCode.charCodeAt(i) === charCodes.lineFeed) { + line++; + lineStart = i + 1; + if (currentMapping !== lineStart) { + maybeAddSegment(map, line, 0, filePath, line, 0); + } + } + } + const {sourceRoot, sourcesContent, ...sourceMap} = toEncodedMap(map); + return sourceMap ; +} + +/** + * Create an array mapping each token index to the 0-based column of the start + * position of the token. + */ +function computeSourceColumns(code, tokens) { + const sourceColumns = new Array(tokens.length); + let tokenIndex = 0; + let currentMapping = tokens[tokenIndex].start; + let lineStart = 0; + for (let i = 0; i < code.length; i++) { + if (i === currentMapping) { + sourceColumns[tokenIndex] = currentMapping - lineStart; + tokenIndex++; + currentMapping = tokens[tokenIndex].start; + } + if (code.charCodeAt(i) === charCodes.lineFeed) { + lineStart = i + 1; + } + } + return sourceColumns; +} Index: frontend/node_modules/sucrase/dist/esm/identifyShadowedGlobals.js =================================================================== --- frontend/node_modules/sucrase/dist/esm/identifyShadowedGlobals.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/esm/identifyShadowedGlobals.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,98 @@ +import { + isBlockScopedDeclaration, + isFunctionScopedDeclaration, + isNonTopLevelDeclaration, +} from "./parser/tokenizer"; + +import {TokenType as tt} from "./parser/tokenizer/types"; + + +/** + * Traverse the given tokens and modify them if necessary to indicate that some names shadow global + * variables. + */ +export default function identifyShadowedGlobals( + tokens, + scopes, + globalNames, +) { + if (!hasShadowedGlobals(tokens, globalNames)) { + return; + } + markShadowedGlobals(tokens, scopes, globalNames); +} + +/** + * We can do a fast up-front check to see if there are any declarations to global names. If not, + * then there's no point in computing scope assignments. + */ +// Exported for testing. +export function hasShadowedGlobals(tokens, globalNames) { + for (const token of tokens.tokens) { + if ( + token.type === tt.name && + !token.isType && + isNonTopLevelDeclaration(token) && + globalNames.has(tokens.identifierNameForToken(token)) + ) { + return true; + } + } + return false; +} + +function markShadowedGlobals( + tokens, + scopes, + globalNames, +) { + const scopeStack = []; + let scopeIndex = scopes.length - 1; + // Scopes were generated at completion time, so they're sorted by end index, so we can maintain a + // good stack by going backwards through them. + for (let i = tokens.tokens.length - 1; ; i--) { + while (scopeStack.length > 0 && scopeStack[scopeStack.length - 1].startTokenIndex === i + 1) { + scopeStack.pop(); + } + while (scopeIndex >= 0 && scopes[scopeIndex].endTokenIndex === i + 1) { + scopeStack.push(scopes[scopeIndex]); + scopeIndex--; + } + // Process scopes after the last iteration so we can make sure we pop all of them. + if (i < 0) { + break; + } + + const token = tokens.tokens[i]; + const name = tokens.identifierNameForToken(token); + if (scopeStack.length > 1 && !token.isType && token.type === tt.name && globalNames.has(name)) { + if (isBlockScopedDeclaration(token)) { + markShadowedForScope(scopeStack[scopeStack.length - 1], tokens, name); + } else if (isFunctionScopedDeclaration(token)) { + let stackIndex = scopeStack.length - 1; + while (stackIndex > 0 && !scopeStack[stackIndex].isFunctionScope) { + stackIndex--; + } + if (stackIndex < 0) { + throw new Error("Did not find parent function scope."); + } + markShadowedForScope(scopeStack[stackIndex], tokens, name); + } + } + } + if (scopeStack.length > 0) { + throw new Error("Expected empty scope stack after processing file."); + } +} + +function markShadowedForScope(scope, tokens, name) { + for (let i = scope.startTokenIndex; i < scope.endTokenIndex; i++) { + const token = tokens.tokens[i]; + if ( + (token.type === tt.name || token.type === tt.jsxName) && + tokens.identifierNameForToken(token) === name + ) { + token.shadowsGlobal = true; + } + } +} Index: frontend/node_modules/sucrase/dist/esm/index.js =================================================================== --- frontend/node_modules/sucrase/dist/esm/index.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/esm/index.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,133 @@ +import CJSImportProcessor from "./CJSImportProcessor"; +import computeSourceMap, {} from "./computeSourceMap"; +import {HelperManager} from "./HelperManager"; +import identifyShadowedGlobals from "./identifyShadowedGlobals"; +import NameManager from "./NameManager"; +import {validateOptions} from "./Options"; + +import {parse} from "./parser"; + +import TokenProcessor from "./TokenProcessor"; +import RootTransformer from "./transformers/RootTransformer"; +import formatTokens from "./util/formatTokens"; +import getTSImportedNames from "./util/getTSImportedNames"; + + + + + + + + + + + + + + +; + +export function getVersion() { + /* istanbul ignore next */ + return "3.35.1"; +} + +export function transform(code, options) { + validateOptions(options); + try { + const sucraseContext = getSucraseContext(code, options); + const transformer = new RootTransformer( + sucraseContext, + options.transforms, + Boolean(options.enableLegacyBabel5ModuleInterop), + options, + ); + const transformerResult = transformer.transform(); + let result = {code: transformerResult.code}; + if (options.sourceMapOptions) { + if (!options.filePath) { + throw new Error("filePath must be specified when generating a source map."); + } + result = { + ...result, + sourceMap: computeSourceMap( + transformerResult, + options.filePath, + options.sourceMapOptions, + code, + sucraseContext.tokenProcessor.tokens, + ), + }; + } + return result; + // eslint-disable-next-line @typescript-eslint/no-explicit-any + } catch (e) { + if (options.filePath) { + e.message = `Error transforming ${options.filePath}: ${e.message}`; + } + throw e; + } +} + +/** + * Return a string representation of the sucrase tokens, mostly useful for + * diagnostic purposes. + */ +export function getFormattedTokens(code, options) { + const tokens = getSucraseContext(code, options).tokenProcessor.tokens; + return formatTokens(code, tokens); +} + +/** + * Call into the parser/tokenizer and do some further preprocessing: + * - Come up with a set of used names so that we can assign new names. + * - Preprocess all import/export statements so we know which globals we are interested in. + * - Compute situations where any of those globals are shadowed. + * + * In the future, some of these preprocessing steps can be skipped based on what actual work is + * being done. + */ +function getSucraseContext(code, options) { + const isJSXEnabled = options.transforms.includes("jsx"); + const isTypeScriptEnabled = options.transforms.includes("typescript"); + const isFlowEnabled = options.transforms.includes("flow"); + const disableESTransforms = options.disableESTransforms === true; + const file = parse(code, isJSXEnabled, isTypeScriptEnabled, isFlowEnabled); + const tokens = file.tokens; + const scopes = file.scopes; + + const nameManager = new NameManager(code, tokens); + const helperManager = new HelperManager(nameManager); + const tokenProcessor = new TokenProcessor( + code, + tokens, + isFlowEnabled, + disableESTransforms, + helperManager, + ); + const enableLegacyTypeScriptModuleInterop = Boolean(options.enableLegacyTypeScriptModuleInterop); + + let importProcessor = null; + if (options.transforms.includes("imports")) { + importProcessor = new CJSImportProcessor( + nameManager, + tokenProcessor, + enableLegacyTypeScriptModuleInterop, + options, + options.transforms.includes("typescript"), + Boolean(options.keepUnusedImports), + helperManager, + ); + importProcessor.preprocessTokens(); + // We need to mark shadowed globals after processing imports so we know that the globals are, + // but before type-only import pruning, since that relies on shadowing information. + identifyShadowedGlobals(tokenProcessor, scopes, importProcessor.getGlobalNames()); + if (options.transforms.includes("typescript") && !options.keepUnusedImports) { + importProcessor.pruneTypeOnlyImports(); + } + } else if (options.transforms.includes("typescript") && !options.keepUnusedImports) { + // Shadowed global detection is needed for TS implicit elision of imported names. + identifyShadowedGlobals(tokenProcessor, scopes, getTSImportedNames(tokenProcessor)); + } + return {tokenProcessor, scopes, nameManager, importProcessor, helperManager}; +} Index: frontend/node_modules/sucrase/dist/esm/parser/index.js =================================================================== --- frontend/node_modules/sucrase/dist/esm/parser/index.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/esm/parser/index.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,31 @@ + + +import {augmentError, initParser, state} from "./traverser/base"; +import {parseFile} from "./traverser/index"; + +export class File { + + + + constructor(tokens, scopes) { + this.tokens = tokens; + this.scopes = scopes; + } +} + +export function parse( + input, + isJSXEnabled, + isTypeScriptEnabled, + isFlowEnabled, +) { + if (isFlowEnabled && isTypeScriptEnabled) { + throw new Error("Cannot combine flow and typescript plugins."); + } + initParser(input, isJSXEnabled, isTypeScriptEnabled, isFlowEnabled); + const result = parseFile(); + if (state.error) { + throw augmentError(state.error); + } + return result; +} Index: frontend/node_modules/sucrase/dist/esm/parser/plugins/flow.js =================================================================== --- frontend/node_modules/sucrase/dist/esm/parser/plugins/flow.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/esm/parser/plugins/flow.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,1105 @@ +/* eslint max-len: 0 */ + +import { + eat, + lookaheadType, + lookaheadTypeAndKeyword, + match, + next, + popTypeContext, + pushTypeContext, + +} from "../tokenizer/index"; +import {ContextualKeyword} from "../tokenizer/keywords"; +import {TokenType, TokenType as tt} from "../tokenizer/types"; +import {input, state} from "../traverser/base"; +import { + baseParseMaybeAssign, + baseParseSubscript, + baseParseSubscripts, + parseArrow, + parseArrowExpression, + parseCallExpressionArguments, + parseExprAtom, + parseExpression, + parseFunctionBody, + parseIdentifier, + parseLiteral, + +} from "../traverser/expression"; +import { + baseParseExportStar, + parseExport, + parseExportFrom, + parseExportSpecifiers, + parseFunctionParams, + parseImport, + parseStatement, +} from "../traverser/statement"; +import { + canInsertSemicolon, + eatContextual, + expect, + expectContextual, + isContextual, + isLookaheadContextual, + semicolon, + unexpected, +} from "../traverser/util"; + +function isMaybeDefaultImport(lookahead) { + return ( + (lookahead.type === tt.name || !!(lookahead.type & TokenType.IS_KEYWORD)) && + lookahead.contextualKeyword !== ContextualKeyword._from + ); +} + +function flowParseTypeInitialiser(tok) { + const oldIsType = pushTypeContext(0); + expect(tok || tt.colon); + flowParseType(); + popTypeContext(oldIsType); +} + +function flowParsePredicate() { + expect(tt.modulo); + expectContextual(ContextualKeyword._checks); + if (eat(tt.parenL)) { + parseExpression(); + expect(tt.parenR); + } +} + +function flowParseTypeAndPredicateInitialiser() { + const oldIsType = pushTypeContext(0); + expect(tt.colon); + if (match(tt.modulo)) { + flowParsePredicate(); + } else { + flowParseType(); + if (match(tt.modulo)) { + flowParsePredicate(); + } + } + popTypeContext(oldIsType); +} + +function flowParseDeclareClass() { + next(); + flowParseInterfaceish(/* isClass */ true); +} + +function flowParseDeclareFunction() { + next(); + parseIdentifier(); + + if (match(tt.lessThan)) { + flowParseTypeParameterDeclaration(); + } + + expect(tt.parenL); + flowParseFunctionTypeParams(); + expect(tt.parenR); + + flowParseTypeAndPredicateInitialiser(); + + semicolon(); +} + +function flowParseDeclare() { + if (match(tt._class)) { + flowParseDeclareClass(); + } else if (match(tt._function)) { + flowParseDeclareFunction(); + } else if (match(tt._var)) { + flowParseDeclareVariable(); + } else if (eatContextual(ContextualKeyword._module)) { + if (eat(tt.dot)) { + flowParseDeclareModuleExports(); + } else { + flowParseDeclareModule(); + } + } else if (isContextual(ContextualKeyword._type)) { + flowParseDeclareTypeAlias(); + } else if (isContextual(ContextualKeyword._opaque)) { + flowParseDeclareOpaqueType(); + } else if (isContextual(ContextualKeyword._interface)) { + flowParseDeclareInterface(); + } else if (match(tt._export)) { + flowParseDeclareExportDeclaration(); + } else { + unexpected(); + } +} + +function flowParseDeclareVariable() { + next(); + flowParseTypeAnnotatableIdentifier(); + semicolon(); +} + +function flowParseDeclareModule() { + if (match(tt.string)) { + parseExprAtom(); + } else { + parseIdentifier(); + } + + expect(tt.braceL); + while (!match(tt.braceR) && !state.error) { + if (match(tt._import)) { + next(); + parseImport(); + } else { + unexpected(); + } + } + expect(tt.braceR); +} + +function flowParseDeclareExportDeclaration() { + expect(tt._export); + + if (eat(tt._default)) { + if (match(tt._function) || match(tt._class)) { + // declare export default class ... + // declare export default function ... + flowParseDeclare(); + } else { + // declare export default [type]; + flowParseType(); + semicolon(); + } + } else if ( + match(tt._var) || // declare export var ... + match(tt._function) || // declare export function ... + match(tt._class) || // declare export class ... + isContextual(ContextualKeyword._opaque) // declare export opaque .. + ) { + flowParseDeclare(); + } else if ( + match(tt.star) || // declare export * from '' + match(tt.braceL) || // declare export {} ... + isContextual(ContextualKeyword._interface) || // declare export interface ... + isContextual(ContextualKeyword._type) || // declare export type ... + isContextual(ContextualKeyword._opaque) // declare export opaque type ... + ) { + parseExport(); + } else { + unexpected(); + } +} + +function flowParseDeclareModuleExports() { + expectContextual(ContextualKeyword._exports); + flowParseTypeAnnotation(); + semicolon(); +} + +function flowParseDeclareTypeAlias() { + next(); + flowParseTypeAlias(); +} + +function flowParseDeclareOpaqueType() { + next(); + flowParseOpaqueType(true); +} + +function flowParseDeclareInterface() { + next(); + flowParseInterfaceish(); +} + +// Interfaces + +function flowParseInterfaceish(isClass = false) { + flowParseRestrictedIdentifier(); + + if (match(tt.lessThan)) { + flowParseTypeParameterDeclaration(); + } + + if (eat(tt._extends)) { + do { + flowParseInterfaceExtends(); + } while (!isClass && eat(tt.comma)); + } + + if (isContextual(ContextualKeyword._mixins)) { + next(); + do { + flowParseInterfaceExtends(); + } while (eat(tt.comma)); + } + + if (isContextual(ContextualKeyword._implements)) { + next(); + do { + flowParseInterfaceExtends(); + } while (eat(tt.comma)); + } + + flowParseObjectType(isClass, false, isClass); +} + +function flowParseInterfaceExtends() { + flowParseQualifiedTypeIdentifier(false); + if (match(tt.lessThan)) { + flowParseTypeParameterInstantiation(); + } +} + +function flowParseInterface() { + flowParseInterfaceish(); +} + +function flowParseRestrictedIdentifier() { + parseIdentifier(); +} + +function flowParseTypeAlias() { + flowParseRestrictedIdentifier(); + + if (match(tt.lessThan)) { + flowParseTypeParameterDeclaration(); + } + + flowParseTypeInitialiser(tt.eq); + semicolon(); +} + +function flowParseOpaqueType(declare) { + expectContextual(ContextualKeyword._type); + flowParseRestrictedIdentifier(); + + if (match(tt.lessThan)) { + flowParseTypeParameterDeclaration(); + } + + // Parse the supertype + if (match(tt.colon)) { + flowParseTypeInitialiser(tt.colon); + } + + if (!declare) { + flowParseTypeInitialiser(tt.eq); + } + semicolon(); +} + +function flowParseTypeParameter() { + flowParseVariance(); + flowParseTypeAnnotatableIdentifier(); + + if (eat(tt.eq)) { + flowParseType(); + } +} + +export function flowParseTypeParameterDeclaration() { + const oldIsType = pushTypeContext(0); + // istanbul ignore else: this condition is already checked at all call sites + if (match(tt.lessThan) || match(tt.typeParameterStart)) { + next(); + } else { + unexpected(); + } + + do { + flowParseTypeParameter(); + if (!match(tt.greaterThan)) { + expect(tt.comma); + } + } while (!match(tt.greaterThan) && !state.error); + expect(tt.greaterThan); + popTypeContext(oldIsType); +} + +function flowParseTypeParameterInstantiation() { + const oldIsType = pushTypeContext(0); + expect(tt.lessThan); + while (!match(tt.greaterThan) && !state.error) { + flowParseType(); + if (!match(tt.greaterThan)) { + expect(tt.comma); + } + } + expect(tt.greaterThan); + popTypeContext(oldIsType); +} + +function flowParseInterfaceType() { + expectContextual(ContextualKeyword._interface); + if (eat(tt._extends)) { + do { + flowParseInterfaceExtends(); + } while (eat(tt.comma)); + } + flowParseObjectType(false, false, false); +} + +function flowParseObjectPropertyKey() { + if (match(tt.num) || match(tt.string)) { + parseExprAtom(); + } else { + parseIdentifier(); + } +} + +function flowParseObjectTypeIndexer() { + // Note: bracketL has already been consumed + if (lookaheadType() === tt.colon) { + flowParseObjectPropertyKey(); + flowParseTypeInitialiser(); + } else { + flowParseType(); + } + expect(tt.bracketR); + flowParseTypeInitialiser(); +} + +function flowParseObjectTypeInternalSlot() { + // Note: both bracketL have already been consumed + flowParseObjectPropertyKey(); + expect(tt.bracketR); + expect(tt.bracketR); + if (match(tt.lessThan) || match(tt.parenL)) { + flowParseObjectTypeMethodish(); + } else { + eat(tt.question); + flowParseTypeInitialiser(); + } +} + +function flowParseObjectTypeMethodish() { + if (match(tt.lessThan)) { + flowParseTypeParameterDeclaration(); + } + + expect(tt.parenL); + while (!match(tt.parenR) && !match(tt.ellipsis) && !state.error) { + flowParseFunctionTypeParam(); + if (!match(tt.parenR)) { + expect(tt.comma); + } + } + + if (eat(tt.ellipsis)) { + flowParseFunctionTypeParam(); + } + expect(tt.parenR); + flowParseTypeInitialiser(); +} + +function flowParseObjectTypeCallProperty() { + flowParseObjectTypeMethodish(); +} + +function flowParseObjectType(allowStatic, allowExact, allowProto) { + let endDelim; + if (allowExact && match(tt.braceBarL)) { + expect(tt.braceBarL); + endDelim = tt.braceBarR; + } else { + expect(tt.braceL); + endDelim = tt.braceR; + } + + while (!match(endDelim) && !state.error) { + if (allowProto && isContextual(ContextualKeyword._proto)) { + const lookahead = lookaheadType(); + if (lookahead !== tt.colon && lookahead !== tt.question) { + next(); + allowStatic = false; + } + } + if (allowStatic && isContextual(ContextualKeyword._static)) { + const lookahead = lookaheadType(); + if (lookahead !== tt.colon && lookahead !== tt.question) { + next(); + } + } + + flowParseVariance(); + + if (eat(tt.bracketL)) { + if (eat(tt.bracketL)) { + flowParseObjectTypeInternalSlot(); + } else { + flowParseObjectTypeIndexer(); + } + } else if (match(tt.parenL) || match(tt.lessThan)) { + flowParseObjectTypeCallProperty(); + } else { + if (isContextual(ContextualKeyword._get) || isContextual(ContextualKeyword._set)) { + const lookahead = lookaheadType(); + if (lookahead === tt.name || lookahead === tt.string || lookahead === tt.num) { + next(); + } + } + + flowParseObjectTypeProperty(); + } + + flowObjectTypeSemicolon(); + } + + expect(endDelim); +} + +function flowParseObjectTypeProperty() { + if (match(tt.ellipsis)) { + expect(tt.ellipsis); + if (!eat(tt.comma)) { + eat(tt.semi); + } + // Explicit inexact object syntax. + if (match(tt.braceR)) { + return; + } + flowParseType(); + } else { + flowParseObjectPropertyKey(); + if (match(tt.lessThan) || match(tt.parenL)) { + // This is a method property + flowParseObjectTypeMethodish(); + } else { + eat(tt.question); + flowParseTypeInitialiser(); + } + } +} + +function flowObjectTypeSemicolon() { + if (!eat(tt.semi) && !eat(tt.comma) && !match(tt.braceR) && !match(tt.braceBarR)) { + unexpected(); + } +} + +function flowParseQualifiedTypeIdentifier(initialIdAlreadyParsed) { + if (!initialIdAlreadyParsed) { + parseIdentifier(); + } + while (eat(tt.dot)) { + parseIdentifier(); + } +} + +function flowParseGenericType() { + flowParseQualifiedTypeIdentifier(true); + if (match(tt.lessThan)) { + flowParseTypeParameterInstantiation(); + } +} + +function flowParseTypeofType() { + expect(tt._typeof); + flowParsePrimaryType(); +} + +function flowParseTupleType() { + expect(tt.bracketL); + // We allow trailing commas + while (state.pos < input.length && !match(tt.bracketR)) { + flowParseType(); + if (match(tt.bracketR)) { + break; + } + expect(tt.comma); + } + expect(tt.bracketR); +} + +function flowParseFunctionTypeParam() { + const lookahead = lookaheadType(); + if (lookahead === tt.colon || lookahead === tt.question) { + parseIdentifier(); + eat(tt.question); + flowParseTypeInitialiser(); + } else { + flowParseType(); + } +} + +function flowParseFunctionTypeParams() { + while (!match(tt.parenR) && !match(tt.ellipsis) && !state.error) { + flowParseFunctionTypeParam(); + if (!match(tt.parenR)) { + expect(tt.comma); + } + } + if (eat(tt.ellipsis)) { + flowParseFunctionTypeParam(); + } +} + +// The parsing of types roughly parallels the parsing of expressions, and +// primary types are kind of like primary expressions...they're the +// primitives with which other types are constructed. +function flowParsePrimaryType() { + let isGroupedType = false; + const oldNoAnonFunctionType = state.noAnonFunctionType; + + switch (state.type) { + case tt.name: { + if (isContextual(ContextualKeyword._interface)) { + flowParseInterfaceType(); + return; + } + parseIdentifier(); + flowParseGenericType(); + return; + } + + case tt.braceL: + flowParseObjectType(false, false, false); + return; + + case tt.braceBarL: + flowParseObjectType(false, true, false); + return; + + case tt.bracketL: + flowParseTupleType(); + return; + + case tt.lessThan: + flowParseTypeParameterDeclaration(); + expect(tt.parenL); + flowParseFunctionTypeParams(); + expect(tt.parenR); + expect(tt.arrow); + flowParseType(); + return; + + case tt.parenL: + next(); + + // Check to see if this is actually a grouped type + if (!match(tt.parenR) && !match(tt.ellipsis)) { + if (match(tt.name)) { + const token = lookaheadType(); + isGroupedType = token !== tt.question && token !== tt.colon; + } else { + isGroupedType = true; + } + } + + if (isGroupedType) { + state.noAnonFunctionType = false; + flowParseType(); + state.noAnonFunctionType = oldNoAnonFunctionType; + + // A `,` or a `) =>` means this is an anonymous function type + if ( + state.noAnonFunctionType || + !(match(tt.comma) || (match(tt.parenR) && lookaheadType() === tt.arrow)) + ) { + expect(tt.parenR); + return; + } else { + // Eat a comma if there is one + eat(tt.comma); + } + } + + flowParseFunctionTypeParams(); + + expect(tt.parenR); + expect(tt.arrow); + flowParseType(); + return; + + case tt.minus: + next(); + parseLiteral(); + return; + + case tt.string: + case tt.num: + case tt._true: + case tt._false: + case tt._null: + case tt._this: + case tt._void: + case tt.star: + next(); + return; + + default: + if (state.type === tt._typeof) { + flowParseTypeofType(); + return; + } else if (state.type & TokenType.IS_KEYWORD) { + next(); + state.tokens[state.tokens.length - 1].type = tt.name; + return; + } + } + + unexpected(); +} + +function flowParsePostfixType() { + flowParsePrimaryType(); + while (!canInsertSemicolon() && (match(tt.bracketL) || match(tt.questionDot))) { + eat(tt.questionDot); + expect(tt.bracketL); + if (eat(tt.bracketR)) { + // Array type + } else { + // Indexed access type + flowParseType(); + expect(tt.bracketR); + } + } +} + +function flowParsePrefixType() { + if (eat(tt.question)) { + flowParsePrefixType(); + } else { + flowParsePostfixType(); + } +} + +function flowParseAnonFunctionWithoutParens() { + flowParsePrefixType(); + if (!state.noAnonFunctionType && eat(tt.arrow)) { + flowParseType(); + } +} + +function flowParseIntersectionType() { + eat(tt.bitwiseAND); + flowParseAnonFunctionWithoutParens(); + while (eat(tt.bitwiseAND)) { + flowParseAnonFunctionWithoutParens(); + } +} + +function flowParseUnionType() { + eat(tt.bitwiseOR); + flowParseIntersectionType(); + while (eat(tt.bitwiseOR)) { + flowParseIntersectionType(); + } +} + +function flowParseType() { + flowParseUnionType(); +} + +export function flowParseTypeAnnotation() { + flowParseTypeInitialiser(); +} + +function flowParseTypeAnnotatableIdentifier() { + parseIdentifier(); + if (match(tt.colon)) { + flowParseTypeAnnotation(); + } +} + +export function flowParseVariance() { + if (match(tt.plus) || match(tt.minus)) { + next(); + state.tokens[state.tokens.length - 1].isType = true; + } +} + +// ================================== +// Overrides +// ================================== + +export function flowParseFunctionBodyAndFinish(funcContextId) { + // For arrow functions, `parseArrow` handles the return type itself. + if (match(tt.colon)) { + flowParseTypeAndPredicateInitialiser(); + } + + parseFunctionBody(false, funcContextId); +} + +export function flowParseSubscript( + startTokenIndex, + noCalls, + stopState, +) { + if (match(tt.questionDot) && lookaheadType() === tt.lessThan) { + if (noCalls) { + stopState.stop = true; + return; + } + next(); + flowParseTypeParameterInstantiation(); + expect(tt.parenL); + parseCallExpressionArguments(); + return; + } else if (!noCalls && match(tt.lessThan)) { + const snapshot = state.snapshot(); + flowParseTypeParameterInstantiation(); + expect(tt.parenL); + parseCallExpressionArguments(); + if (state.error) { + state.restoreFromSnapshot(snapshot); + } else { + return; + } + } + baseParseSubscript(startTokenIndex, noCalls, stopState); +} + +export function flowStartParseNewArguments() { + if (match(tt.lessThan)) { + const snapshot = state.snapshot(); + flowParseTypeParameterInstantiation(); + if (state.error) { + state.restoreFromSnapshot(snapshot); + } + } +} + +// interfaces +export function flowTryParseStatement() { + if (match(tt.name) && state.contextualKeyword === ContextualKeyword._interface) { + const oldIsType = pushTypeContext(0); + next(); + flowParseInterface(); + popTypeContext(oldIsType); + return true; + } else if (isContextual(ContextualKeyword._enum)) { + flowParseEnumDeclaration(); + return true; + } + return false; +} + +export function flowTryParseExportDefaultExpression() { + if (isContextual(ContextualKeyword._enum)) { + flowParseEnumDeclaration(); + return true; + } + return false; +} + +// declares, interfaces and type aliases +export function flowParseIdentifierStatement(contextualKeyword) { + if (contextualKeyword === ContextualKeyword._declare) { + if ( + match(tt._class) || + match(tt.name) || + match(tt._function) || + match(tt._var) || + match(tt._export) + ) { + const oldIsType = pushTypeContext(1); + flowParseDeclare(); + popTypeContext(oldIsType); + } + } else if (match(tt.name)) { + if (contextualKeyword === ContextualKeyword._interface) { + const oldIsType = pushTypeContext(1); + flowParseInterface(); + popTypeContext(oldIsType); + } else if (contextualKeyword === ContextualKeyword._type) { + const oldIsType = pushTypeContext(1); + flowParseTypeAlias(); + popTypeContext(oldIsType); + } else if (contextualKeyword === ContextualKeyword._opaque) { + const oldIsType = pushTypeContext(1); + flowParseOpaqueType(false); + popTypeContext(oldIsType); + } + } + semicolon(); +} + +// export type +export function flowShouldParseExportDeclaration() { + return ( + isContextual(ContextualKeyword._type) || + isContextual(ContextualKeyword._interface) || + isContextual(ContextualKeyword._opaque) || + isContextual(ContextualKeyword._enum) + ); +} + +export function flowShouldDisallowExportDefaultSpecifier() { + return ( + match(tt.name) && + (state.contextualKeyword === ContextualKeyword._type || + state.contextualKeyword === ContextualKeyword._interface || + state.contextualKeyword === ContextualKeyword._opaque || + state.contextualKeyword === ContextualKeyword._enum) + ); +} + +export function flowParseExportDeclaration() { + if (isContextual(ContextualKeyword._type)) { + const oldIsType = pushTypeContext(1); + next(); + + if (match(tt.braceL)) { + // export type { foo, bar }; + parseExportSpecifiers(); + parseExportFrom(); + } else { + // export type Foo = Bar; + flowParseTypeAlias(); + } + popTypeContext(oldIsType); + } else if (isContextual(ContextualKeyword._opaque)) { + const oldIsType = pushTypeContext(1); + next(); + // export opaque type Foo = Bar; + flowParseOpaqueType(false); + popTypeContext(oldIsType); + } else if (isContextual(ContextualKeyword._interface)) { + const oldIsType = pushTypeContext(1); + next(); + flowParseInterface(); + popTypeContext(oldIsType); + } else { + parseStatement(true); + } +} + +export function flowShouldParseExportStar() { + return match(tt.star) || (isContextual(ContextualKeyword._type) && lookaheadType() === tt.star); +} + +export function flowParseExportStar() { + if (eatContextual(ContextualKeyword._type)) { + const oldIsType = pushTypeContext(2); + baseParseExportStar(); + popTypeContext(oldIsType); + } else { + baseParseExportStar(); + } +} + +// parse a the super class type parameters and implements +export function flowAfterParseClassSuper(hasSuper) { + if (hasSuper && match(tt.lessThan)) { + flowParseTypeParameterInstantiation(); + } + if (isContextual(ContextualKeyword._implements)) { + const oldIsType = pushTypeContext(0); + next(); + state.tokens[state.tokens.length - 1].type = tt._implements; + do { + flowParseRestrictedIdentifier(); + if (match(tt.lessThan)) { + flowParseTypeParameterInstantiation(); + } + } while (eat(tt.comma)); + popTypeContext(oldIsType); + } +} + +// parse type parameters for object method shorthand +export function flowStartParseObjPropValue() { + // method shorthand + if (match(tt.lessThan)) { + flowParseTypeParameterDeclaration(); + if (!match(tt.parenL)) unexpected(); + } +} + +export function flowParseAssignableListItemTypes() { + const oldIsType = pushTypeContext(0); + eat(tt.question); + if (match(tt.colon)) { + flowParseTypeAnnotation(); + } + popTypeContext(oldIsType); +} + +// parse typeof and type imports +export function flowStartParseImportSpecifiers() { + if (match(tt._typeof) || isContextual(ContextualKeyword._type)) { + const lh = lookaheadTypeAndKeyword(); + if (isMaybeDefaultImport(lh) || lh.type === tt.braceL || lh.type === tt.star) { + next(); + } + } +} + +// parse import-type/typeof shorthand +export function flowParseImportSpecifier() { + const isTypeKeyword = + state.contextualKeyword === ContextualKeyword._type || state.type === tt._typeof; + if (isTypeKeyword) { + next(); + } else { + parseIdentifier(); + } + + if (isContextual(ContextualKeyword._as) && !isLookaheadContextual(ContextualKeyword._as)) { + parseIdentifier(); + if (isTypeKeyword && !match(tt.name) && !(state.type & TokenType.IS_KEYWORD)) { + // `import {type as ,` or `import {type as }` + } else { + // `import {type as foo` + parseIdentifier(); + } + } else { + if (isTypeKeyword && (match(tt.name) || !!(state.type & TokenType.IS_KEYWORD))) { + // `import {type foo` + parseIdentifier(); + } + if (eatContextual(ContextualKeyword._as)) { + parseIdentifier(); + } + } +} + +// parse function type parameters - function foo() {} +export function flowStartParseFunctionParams() { + // Originally this checked if the method is a getter/setter, but if it was, we'd crash soon + // anyway, so don't try to propagate that information. + if (match(tt.lessThan)) { + const oldIsType = pushTypeContext(0); + flowParseTypeParameterDeclaration(); + popTypeContext(oldIsType); + } +} + +// parse flow type annotations on variable declarator heads - let foo: string = bar +export function flowAfterParseVarHead() { + if (match(tt.colon)) { + flowParseTypeAnnotation(); + } +} + +// parse the return type of an async arrow function - let foo = (async (): number => {}); +export function flowStartParseAsyncArrowFromCallExpression() { + if (match(tt.colon)) { + const oldNoAnonFunctionType = state.noAnonFunctionType; + state.noAnonFunctionType = true; + flowParseTypeAnnotation(); + state.noAnonFunctionType = oldNoAnonFunctionType; + } +} + +// We need to support type parameter declarations for arrow functions. This +// is tricky. There are three situations we need to handle +// +// 1. This is either JSX or an arrow function. We'll try JSX first. If that +// fails, we'll try an arrow function. If that fails, we'll throw the JSX +// error. +// 2. This is an arrow function. We'll parse the type parameter declaration, +// parse the rest, make sure the rest is an arrow function, and go from +// there +// 3. This is neither. Just call the super method +export function flowParseMaybeAssign(noIn, isWithinParens) { + if (match(tt.lessThan)) { + const snapshot = state.snapshot(); + let wasArrow = baseParseMaybeAssign(noIn, isWithinParens); + if (state.error) { + state.restoreFromSnapshot(snapshot); + state.type = tt.typeParameterStart; + } else { + return wasArrow; + } + + const oldIsType = pushTypeContext(0); + flowParseTypeParameterDeclaration(); + popTypeContext(oldIsType); + wasArrow = baseParseMaybeAssign(noIn, isWithinParens); + if (wasArrow) { + return true; + } + unexpected(); + } + + return baseParseMaybeAssign(noIn, isWithinParens); +} + +// handle return types for arrow functions +export function flowParseArrow() { + if (match(tt.colon)) { + const oldIsType = pushTypeContext(0); + const snapshot = state.snapshot(); + + const oldNoAnonFunctionType = state.noAnonFunctionType; + state.noAnonFunctionType = true; + flowParseTypeAndPredicateInitialiser(); + state.noAnonFunctionType = oldNoAnonFunctionType; + + if (canInsertSemicolon()) unexpected(); + if (!match(tt.arrow)) unexpected(); + + if (state.error) { + state.restoreFromSnapshot(snapshot); + } + popTypeContext(oldIsType); + } + return eat(tt.arrow); +} + +export function flowParseSubscripts(startTokenIndex, noCalls = false) { + if ( + state.tokens[state.tokens.length - 1].contextualKeyword === ContextualKeyword._async && + match(tt.lessThan) + ) { + const snapshot = state.snapshot(); + const wasArrow = parseAsyncArrowWithTypeParameters(); + if (wasArrow && !state.error) { + return; + } + state.restoreFromSnapshot(snapshot); + } + + baseParseSubscripts(startTokenIndex, noCalls); +} + +// Returns true if there was an arrow function here. +function parseAsyncArrowWithTypeParameters() { + state.scopeDepth++; + const startTokenIndex = state.tokens.length; + parseFunctionParams(); + if (!parseArrow()) { + return false; + } + parseArrowExpression(startTokenIndex); + return true; +} + +function flowParseEnumDeclaration() { + expectContextual(ContextualKeyword._enum); + state.tokens[state.tokens.length - 1].type = tt._enum; + parseIdentifier(); + flowParseEnumBody(); +} + +function flowParseEnumBody() { + if (eatContextual(ContextualKeyword._of)) { + next(); + } + expect(tt.braceL); + flowParseEnumMembers(); + expect(tt.braceR); +} + +function flowParseEnumMembers() { + while (!match(tt.braceR) && !state.error) { + if (eat(tt.ellipsis)) { + break; + } + flowParseEnumMember(); + if (!match(tt.braceR)) { + expect(tt.comma); + } + } +} + +function flowParseEnumMember() { + parseIdentifier(); + if (eat(tt.eq)) { + // Flow enum values are always just one token (a string, number, or boolean literal). + next(); + } +} Index: frontend/node_modules/sucrase/dist/esm/parser/plugins/jsx/index.js =================================================================== --- frontend/node_modules/sucrase/dist/esm/parser/plugins/jsx/index.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/esm/parser/plugins/jsx/index.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,367 @@ +import { + eat, + finishToken, + getTokenFromCode, + IdentifierRole, + JSXRole, + match, + next, + skipSpace, + Token, +} from "../../tokenizer/index"; +import {TokenType as tt} from "../../tokenizer/types"; +import {input, isTypeScriptEnabled, state} from "../../traverser/base"; +import {parseExpression, parseMaybeAssign} from "../../traverser/expression"; +import {expect, unexpected} from "../../traverser/util"; +import {charCodes} from "../../util/charcodes"; +import {IS_IDENTIFIER_CHAR, IS_IDENTIFIER_START} from "../../util/identifier"; +import {tsTryParseJSXTypeArgument} from "../typescript"; + +/** + * Read token with JSX contents. + * + * In addition to detecting jsxTagStart and also regular tokens that might be + * part of an expression, this code detects the start and end of text ranges + * within JSX children. In order to properly count the number of children, we + * distinguish jsxText from jsxEmptyText, which is a text range that simplifies + * to the empty string after JSX whitespace trimming. + * + * It turns out that a JSX text range will simplify to the empty string if and + * only if both of these conditions hold: + * - The range consists entirely of whitespace characters (only counting space, + * tab, \r, and \n). + * - The range has at least one newline. + * This can be proven by analyzing any implementation of whitespace trimming, + * e.g. formatJSXTextLiteral in Sucrase or cleanJSXElementLiteralChild in Babel. + */ +function jsxReadToken() { + let sawNewline = false; + let sawNonWhitespace = false; + while (true) { + if (state.pos >= input.length) { + unexpected("Unterminated JSX contents"); + return; + } + + const ch = input.charCodeAt(state.pos); + if (ch === charCodes.lessThan || ch === charCodes.leftCurlyBrace) { + if (state.pos === state.start) { + if (ch === charCodes.lessThan) { + state.pos++; + finishToken(tt.jsxTagStart); + return; + } + getTokenFromCode(ch); + return; + } + if (sawNewline && !sawNonWhitespace) { + finishToken(tt.jsxEmptyText); + } else { + finishToken(tt.jsxText); + } + return; + } + + // This is part of JSX text. + if (ch === charCodes.lineFeed) { + sawNewline = true; + } else if (ch !== charCodes.space && ch !== charCodes.carriageReturn && ch !== charCodes.tab) { + sawNonWhitespace = true; + } + state.pos++; + } +} + +function jsxReadString(quote) { + state.pos++; + for (;;) { + if (state.pos >= input.length) { + unexpected("Unterminated string constant"); + return; + } + + const ch = input.charCodeAt(state.pos); + if (ch === quote) { + state.pos++; + break; + } + state.pos++; + } + finishToken(tt.string); +} + +// Read a JSX identifier (valid tag or attribute name). +// +// Optimized version since JSX identifiers can't contain +// escape characters and so can be read as single slice. +// Also assumes that first character was already checked +// by isIdentifierStart in readToken. + +function jsxReadWord() { + let ch; + do { + if (state.pos > input.length) { + unexpected("Unexpectedly reached the end of input."); + return; + } + ch = input.charCodeAt(++state.pos); + } while (IS_IDENTIFIER_CHAR[ch] || ch === charCodes.dash); + finishToken(tt.jsxName); +} + +// Parse next token as JSX identifier +function jsxParseIdentifier() { + nextJSXTagToken(); +} + +// Parse namespaced identifier. +function jsxParseNamespacedName(identifierRole) { + jsxParseIdentifier(); + if (!eat(tt.colon)) { + // Plain identifier, so this is an access. + state.tokens[state.tokens.length - 1].identifierRole = identifierRole; + return; + } + // Process the second half of the namespaced name. + jsxParseIdentifier(); +} + +// Parses element name in any form - namespaced, member +// or single identifier. +function jsxParseElementName() { + const firstTokenIndex = state.tokens.length; + jsxParseNamespacedName(IdentifierRole.Access); + let hadDot = false; + while (match(tt.dot)) { + hadDot = true; + nextJSXTagToken(); + jsxParseIdentifier(); + } + // For tags like
with a lowercase letter and no dots, the name is + // actually *not* an identifier access, since it's referring to a built-in + // tag name. Remove the identifier role in this case so that it's not + // accidentally transformed by the imports transform when preserving JSX. + if (!hadDot) { + const firstToken = state.tokens[firstTokenIndex]; + const firstChar = input.charCodeAt(firstToken.start); + if (firstChar >= charCodes.lowercaseA && firstChar <= charCodes.lowercaseZ) { + firstToken.identifierRole = null; + } + } +} + +// Parses any type of JSX attribute value. +function jsxParseAttributeValue() { + switch (state.type) { + case tt.braceL: + next(); + parseExpression(); + nextJSXTagToken(); + return; + + case tt.jsxTagStart: + jsxParseElement(); + nextJSXTagToken(); + return; + + case tt.string: + nextJSXTagToken(); + return; + + default: + unexpected("JSX value should be either an expression or a quoted JSX text"); + } +} + +// Parse JSX spread child, after already processing the { +// Does not parse the closing } +function jsxParseSpreadChild() { + expect(tt.ellipsis); + parseExpression(); +} + +// Parses JSX opening tag starting after "<". +// Returns true if the tag was self-closing. +// Does not parse the last token. +function jsxParseOpeningElement(initialTokenIndex) { + if (match(tt.jsxTagEnd)) { + // This is an open-fragment. + return false; + } + jsxParseElementName(); + if (isTypeScriptEnabled) { + tsTryParseJSXTypeArgument(); + } + let hasSeenPropSpread = false; + while (!match(tt.slash) && !match(tt.jsxTagEnd) && !state.error) { + if (eat(tt.braceL)) { + hasSeenPropSpread = true; + expect(tt.ellipsis); + parseMaybeAssign(); + // } + nextJSXTagToken(); + continue; + } + if ( + hasSeenPropSpread && + state.end - state.start === 3 && + input.charCodeAt(state.start) === charCodes.lowercaseK && + input.charCodeAt(state.start + 1) === charCodes.lowercaseE && + input.charCodeAt(state.start + 2) === charCodes.lowercaseY + ) { + state.tokens[initialTokenIndex].jsxRole = JSXRole.KeyAfterPropSpread; + } + jsxParseNamespacedName(IdentifierRole.ObjectKey); + if (match(tt.eq)) { + nextJSXTagToken(); + jsxParseAttributeValue(); + } + } + const isSelfClosing = match(tt.slash); + if (isSelfClosing) { + // / + nextJSXTagToken(); + } + return isSelfClosing; +} + +// Parses JSX closing tag starting after " 1) { + state.tokens[initialTokenIndex].jsxRole = JSXRole.StaticChildren; + } + } + return; + } + numExplicitChildren++; + jsxParseElementAt(); + nextJSXExprToken(); + break; + + case tt.jsxText: + numExplicitChildren++; + nextJSXExprToken(); + break; + + case tt.jsxEmptyText: + nextJSXExprToken(); + break; + + case tt.braceL: + next(); + if (match(tt.ellipsis)) { + jsxParseSpreadChild(); + nextJSXExprToken(); + // Spread children are a mechanism to explicitly mark children as + // static, so count it as 2 children to satisfy the "more than one + // child" condition. + numExplicitChildren += 2; + } else { + // If we see {}, this is an empty pseudo-expression that doesn't + // count as a child. + if (!match(tt.braceR)) { + numExplicitChildren++; + parseExpression(); + } + nextJSXExprToken(); + } + + break; + + // istanbul ignore next - should never happen + default: + unexpected(); + return; + } + } + } +} + +// Parses entire JSX element from current position. +// Does not parse the last token. +export function jsxParseElement() { + nextJSXTagToken(); + jsxParseElementAt(); +} + +// ================================== +// Overrides +// ================================== + +export function nextJSXTagToken() { + state.tokens.push(new Token()); + skipSpace(); + state.start = state.pos; + const code = input.charCodeAt(state.pos); + + if (IS_IDENTIFIER_START[code]) { + jsxReadWord(); + } else if (code === charCodes.quotationMark || code === charCodes.apostrophe) { + jsxReadString(code); + } else { + // The following tokens are just one character each. + ++state.pos; + switch (code) { + case charCodes.greaterThan: + finishToken(tt.jsxTagEnd); + break; + case charCodes.lessThan: + finishToken(tt.jsxTagStart); + break; + case charCodes.slash: + finishToken(tt.slash); + break; + case charCodes.equalsTo: + finishToken(tt.eq); + break; + case charCodes.leftCurlyBrace: + finishToken(tt.braceL); + break; + case charCodes.dot: + finishToken(tt.dot); + break; + case charCodes.colon: + finishToken(tt.colon); + break; + default: + unexpected(); + } + } +} + +function nextJSXExprToken() { + state.tokens.push(new Token()); + state.start = state.pos; + jsxReadToken(); +} Index: frontend/node_modules/sucrase/dist/esm/parser/plugins/jsx/xhtml.js =================================================================== --- frontend/node_modules/sucrase/dist/esm/parser/plugins/jsx/xhtml.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/esm/parser/plugins/jsx/xhtml.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,256 @@ +// Use a Map rather than object to avoid unexpected __proto__ access. +export default new Map([ + ["quot", "\u0022"], + ["amp", "&"], + ["apos", "\u0027"], + ["lt", "<"], + ["gt", ">"], + ["nbsp", "\u00A0"], + ["iexcl", "\u00A1"], + ["cent", "\u00A2"], + ["pound", "\u00A3"], + ["curren", "\u00A4"], + ["yen", "\u00A5"], + ["brvbar", "\u00A6"], + ["sect", "\u00A7"], + ["uml", "\u00A8"], + ["copy", "\u00A9"], + ["ordf", "\u00AA"], + ["laquo", "\u00AB"], + ["not", "\u00AC"], + ["shy", "\u00AD"], + ["reg", "\u00AE"], + ["macr", "\u00AF"], + ["deg", "\u00B0"], + ["plusmn", "\u00B1"], + ["sup2", "\u00B2"], + ["sup3", "\u00B3"], + ["acute", "\u00B4"], + ["micro", "\u00B5"], + ["para", "\u00B6"], + ["middot", "\u00B7"], + ["cedil", "\u00B8"], + ["sup1", "\u00B9"], + ["ordm", "\u00BA"], + ["raquo", "\u00BB"], + ["frac14", "\u00BC"], + ["frac12", "\u00BD"], + ["frac34", "\u00BE"], + ["iquest", "\u00BF"], + ["Agrave", "\u00C0"], + ["Aacute", "\u00C1"], + ["Acirc", "\u00C2"], + ["Atilde", "\u00C3"], + ["Auml", "\u00C4"], + ["Aring", "\u00C5"], + ["AElig", "\u00C6"], + ["Ccedil", "\u00C7"], + ["Egrave", "\u00C8"], + ["Eacute", "\u00C9"], + ["Ecirc", "\u00CA"], + ["Euml", "\u00CB"], + ["Igrave", "\u00CC"], + ["Iacute", "\u00CD"], + ["Icirc", "\u00CE"], + ["Iuml", "\u00CF"], + ["ETH", "\u00D0"], + ["Ntilde", "\u00D1"], + ["Ograve", "\u00D2"], + ["Oacute", "\u00D3"], + ["Ocirc", "\u00D4"], + ["Otilde", "\u00D5"], + ["Ouml", "\u00D6"], + ["times", "\u00D7"], + ["Oslash", "\u00D8"], + ["Ugrave", "\u00D9"], + ["Uacute", "\u00DA"], + ["Ucirc", "\u00DB"], + ["Uuml", "\u00DC"], + ["Yacute", "\u00DD"], + ["THORN", "\u00DE"], + ["szlig", "\u00DF"], + ["agrave", "\u00E0"], + ["aacute", "\u00E1"], + ["acirc", "\u00E2"], + ["atilde", "\u00E3"], + ["auml", "\u00E4"], + ["aring", "\u00E5"], + ["aelig", "\u00E6"], + ["ccedil", "\u00E7"], + ["egrave", "\u00E8"], + ["eacute", "\u00E9"], + ["ecirc", "\u00EA"], + ["euml", "\u00EB"], + ["igrave", "\u00EC"], + ["iacute", "\u00ED"], + ["icirc", "\u00EE"], + ["iuml", "\u00EF"], + ["eth", "\u00F0"], + ["ntilde", "\u00F1"], + ["ograve", "\u00F2"], + ["oacute", "\u00F3"], + ["ocirc", "\u00F4"], + ["otilde", "\u00F5"], + ["ouml", "\u00F6"], + ["divide", "\u00F7"], + ["oslash", "\u00F8"], + ["ugrave", "\u00F9"], + ["uacute", "\u00FA"], + ["ucirc", "\u00FB"], + ["uuml", "\u00FC"], + ["yacute", "\u00FD"], + ["thorn", "\u00FE"], + ["yuml", "\u00FF"], + ["OElig", "\u0152"], + ["oelig", "\u0153"], + ["Scaron", "\u0160"], + ["scaron", "\u0161"], + ["Yuml", "\u0178"], + ["fnof", "\u0192"], + ["circ", "\u02C6"], + ["tilde", "\u02DC"], + ["Alpha", "\u0391"], + ["Beta", "\u0392"], + ["Gamma", "\u0393"], + ["Delta", "\u0394"], + ["Epsilon", "\u0395"], + ["Zeta", "\u0396"], + ["Eta", "\u0397"], + ["Theta", "\u0398"], + ["Iota", "\u0399"], + ["Kappa", "\u039A"], + ["Lambda", "\u039B"], + ["Mu", "\u039C"], + ["Nu", "\u039D"], + ["Xi", "\u039E"], + ["Omicron", "\u039F"], + ["Pi", "\u03A0"], + ["Rho", "\u03A1"], + ["Sigma", "\u03A3"], + ["Tau", "\u03A4"], + ["Upsilon", "\u03A5"], + ["Phi", "\u03A6"], + ["Chi", "\u03A7"], + ["Psi", "\u03A8"], + ["Omega", "\u03A9"], + ["alpha", "\u03B1"], + ["beta", "\u03B2"], + ["gamma", "\u03B3"], + ["delta", "\u03B4"], + ["epsilon", "\u03B5"], + ["zeta", "\u03B6"], + ["eta", "\u03B7"], + ["theta", "\u03B8"], + ["iota", "\u03B9"], + ["kappa", "\u03BA"], + ["lambda", "\u03BB"], + ["mu", "\u03BC"], + ["nu", "\u03BD"], + ["xi", "\u03BE"], + ["omicron", "\u03BF"], + ["pi", "\u03C0"], + ["rho", "\u03C1"], + ["sigmaf", "\u03C2"], + ["sigma", "\u03C3"], + ["tau", "\u03C4"], + ["upsilon", "\u03C5"], + ["phi", "\u03C6"], + ["chi", "\u03C7"], + ["psi", "\u03C8"], + ["omega", "\u03C9"], + ["thetasym", "\u03D1"], + ["upsih", "\u03D2"], + ["piv", "\u03D6"], + ["ensp", "\u2002"], + ["emsp", "\u2003"], + ["thinsp", "\u2009"], + ["zwnj", "\u200C"], + ["zwj", "\u200D"], + ["lrm", "\u200E"], + ["rlm", "\u200F"], + ["ndash", "\u2013"], + ["mdash", "\u2014"], + ["lsquo", "\u2018"], + ["rsquo", "\u2019"], + ["sbquo", "\u201A"], + ["ldquo", "\u201C"], + ["rdquo", "\u201D"], + ["bdquo", "\u201E"], + ["dagger", "\u2020"], + ["Dagger", "\u2021"], + ["bull", "\u2022"], + ["hellip", "\u2026"], + ["permil", "\u2030"], + ["prime", "\u2032"], + ["Prime", "\u2033"], + ["lsaquo", "\u2039"], + ["rsaquo", "\u203A"], + ["oline", "\u203E"], + ["frasl", "\u2044"], + ["euro", "\u20AC"], + ["image", "\u2111"], + ["weierp", "\u2118"], + ["real", "\u211C"], + ["trade", "\u2122"], + ["alefsym", "\u2135"], + ["larr", "\u2190"], + ["uarr", "\u2191"], + ["rarr", "\u2192"], + ["darr", "\u2193"], + ["harr", "\u2194"], + ["crarr", "\u21B5"], + ["lArr", "\u21D0"], + ["uArr", "\u21D1"], + ["rArr", "\u21D2"], + ["dArr", "\u21D3"], + ["hArr", "\u21D4"], + ["forall", "\u2200"], + ["part", "\u2202"], + ["exist", "\u2203"], + ["empty", "\u2205"], + ["nabla", "\u2207"], + ["isin", "\u2208"], + ["notin", "\u2209"], + ["ni", "\u220B"], + ["prod", "\u220F"], + ["sum", "\u2211"], + ["minus", "\u2212"], + ["lowast", "\u2217"], + ["radic", "\u221A"], + ["prop", "\u221D"], + ["infin", "\u221E"], + ["ang", "\u2220"], + ["and", "\u2227"], + ["or", "\u2228"], + ["cap", "\u2229"], + ["cup", "\u222A"], + ["int", "\u222B"], + ["there4", "\u2234"], + ["sim", "\u223C"], + ["cong", "\u2245"], + ["asymp", "\u2248"], + ["ne", "\u2260"], + ["equiv", "\u2261"], + ["le", "\u2264"], + ["ge", "\u2265"], + ["sub", "\u2282"], + ["sup", "\u2283"], + ["nsub", "\u2284"], + ["sube", "\u2286"], + ["supe", "\u2287"], + ["oplus", "\u2295"], + ["otimes", "\u2297"], + ["perp", "\u22A5"], + ["sdot", "\u22C5"], + ["lceil", "\u2308"], + ["rceil", "\u2309"], + ["lfloor", "\u230A"], + ["rfloor", "\u230B"], + ["lang", "\u2329"], + ["rang", "\u232A"], + ["loz", "\u25CA"], + ["spades", "\u2660"], + ["clubs", "\u2663"], + ["hearts", "\u2665"], + ["diams", "\u2666"], +]); Index: frontend/node_modules/sucrase/dist/esm/parser/plugins/types.js =================================================================== --- frontend/node_modules/sucrase/dist/esm/parser/plugins/types.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/esm/parser/plugins/types.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,37 @@ +import {eatTypeToken, lookaheadType, match} from "../tokenizer/index"; +import {TokenType as tt} from "../tokenizer/types"; +import {isFlowEnabled, isTypeScriptEnabled} from "../traverser/base"; +import {baseParseConditional} from "../traverser/expression"; +import {flowParseTypeAnnotation} from "./flow"; +import {tsParseTypeAnnotation} from "./typescript"; + +/** + * Common parser code for TypeScript and Flow. + */ + +// An apparent conditional expression could actually be an optional parameter in an arrow function. +export function typedParseConditional(noIn) { + // If we see ?:, this can't possibly be a valid conditional. typedParseParenItem will be called + // later to finish off the arrow parameter. We also need to handle bare ? tokens for optional + // parameters without type annotations, i.e. ?, and ?) . + if (match(tt.question)) { + const nextType = lookaheadType(); + if (nextType === tt.colon || nextType === tt.comma || nextType === tt.parenR) { + return; + } + } + baseParseConditional(noIn); +} + +// Note: These "type casts" are *not* valid TS expressions. +// But we parse them here and change them when completing the arrow function. +export function typedParseParenItem() { + eatTypeToken(tt.question); + if (match(tt.colon)) { + if (isTypeScriptEnabled) { + tsParseTypeAnnotation(); + } else if (isFlowEnabled) { + flowParseTypeAnnotation(); + } + } +} Index: frontend/node_modules/sucrase/dist/esm/parser/plugins/typescript.js =================================================================== --- frontend/node_modules/sucrase/dist/esm/parser/plugins/typescript.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/esm/parser/plugins/typescript.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,1632 @@ +import { + eat, + finishToken, + IdentifierRole, + lookaheadType, + lookaheadTypeAndKeyword, + match, + next, + nextTemplateToken, + popTypeContext, + pushTypeContext, + rescan_gt, +} from "../tokenizer/index"; +import {ContextualKeyword} from "../tokenizer/keywords"; +import {TokenType, TokenType as tt} from "../tokenizer/types"; +import {isJSXEnabled, state} from "../traverser/base"; +import { + atPossibleAsync, + baseParseMaybeAssign, + baseParseSubscript, + parseCallExpressionArguments, + parseExprAtom, + parseExpression, + parseFunctionBody, + parseIdentifier, + parseLiteral, + parseMaybeAssign, + parseMaybeUnary, + parsePropertyName, + parseTemplate, + +} from "../traverser/expression"; +import {parseBindingIdentifier, parseBindingList, parseImportedIdentifier} from "../traverser/lval"; +import { + baseParseMaybeDecoratorArguments, + parseBlockBody, + parseClass, + parseFunction, + parseFunctionParams, + parseStatement, + parseVarStatement, +} from "../traverser/statement"; +import { + canInsertSemicolon, + eatContextual, + expect, + expectContextual, + hasPrecedingLineBreak, + isContextual, + isLineTerminator, + isLookaheadContextual, + semicolon, + unexpected, +} from "../traverser/util"; +import {nextJSXTagToken} from "./jsx"; + +function tsIsIdentifier() { + // TODO: actually a bit more complex in TypeScript, but shouldn't matter. + // See https://github.com/Microsoft/TypeScript/issues/15008 + return match(tt.name); +} + +function isLiteralPropertyName() { + return ( + match(tt.name) || + Boolean(state.type & TokenType.IS_KEYWORD) || + match(tt.string) || + match(tt.num) || + match(tt.bigint) || + match(tt.decimal) + ); +} + +function tsNextTokenCanFollowModifier() { + // Note: TypeScript's implementation is much more complicated because + // more things are considered modifiers there. + // This implementation only handles modifiers not handled by babylon itself. And "static". + // TODO: Would be nice to avoid lookahead. Want a hasLineBreakUpNext() method... + const snapshot = state.snapshot(); + + next(); + const canFollowModifier = + (match(tt.bracketL) || + match(tt.braceL) || + match(tt.star) || + match(tt.ellipsis) || + match(tt.hash) || + isLiteralPropertyName()) && + !hasPrecedingLineBreak(); + + if (canFollowModifier) { + return true; + } else { + state.restoreFromSnapshot(snapshot); + return false; + } +} + +export function tsParseModifiers(allowedModifiers) { + while (true) { + const modifier = tsParseModifier(allowedModifiers); + if (modifier === null) { + break; + } + } +} + +/** Parses a modifier matching one the given modifier names. */ +export function tsParseModifier( + allowedModifiers, +) { + if (!match(tt.name)) { + return null; + } + + const modifier = state.contextualKeyword; + if (allowedModifiers.indexOf(modifier) !== -1 && tsNextTokenCanFollowModifier()) { + switch (modifier) { + case ContextualKeyword._readonly: + state.tokens[state.tokens.length - 1].type = tt._readonly; + break; + case ContextualKeyword._abstract: + state.tokens[state.tokens.length - 1].type = tt._abstract; + break; + case ContextualKeyword._static: + state.tokens[state.tokens.length - 1].type = tt._static; + break; + case ContextualKeyword._public: + state.tokens[state.tokens.length - 1].type = tt._public; + break; + case ContextualKeyword._private: + state.tokens[state.tokens.length - 1].type = tt._private; + break; + case ContextualKeyword._protected: + state.tokens[state.tokens.length - 1].type = tt._protected; + break; + case ContextualKeyword._override: + state.tokens[state.tokens.length - 1].type = tt._override; + break; + case ContextualKeyword._declare: + state.tokens[state.tokens.length - 1].type = tt._declare; + break; + default: + break; + } + return modifier; + } + return null; +} + +function tsParseEntityName() { + parseIdentifier(); + while (eat(tt.dot)) { + parseIdentifier(); + } +} + +function tsParseTypeReference() { + tsParseEntityName(); + if (!hasPrecedingLineBreak() && match(tt.lessThan)) { + tsParseTypeArguments(); + } +} + +function tsParseThisTypePredicate() { + next(); + tsParseTypeAnnotation(); +} + +function tsParseThisTypeNode() { + next(); +} + +function tsParseTypeQuery() { + expect(tt._typeof); + if (match(tt._import)) { + tsParseImportType(); + } else { + tsParseEntityName(); + } + if (!hasPrecedingLineBreak() && match(tt.lessThan)) { + tsParseTypeArguments(); + } +} + +function tsParseImportType() { + expect(tt._import); + expect(tt.parenL); + expect(tt.string); + expect(tt.parenR); + if (eat(tt.dot)) { + tsParseEntityName(); + } + if (match(tt.lessThan)) { + tsParseTypeArguments(); + } +} + +function tsParseTypeParameter() { + eat(tt._const); + const hadIn = eat(tt._in); + const hadOut = eatContextual(ContextualKeyword._out); + eat(tt._const); + if ((hadIn || hadOut) && !match(tt.name)) { + // The "in" or "out" keyword must have actually been the type parameter + // name, so set it as the name. + state.tokens[state.tokens.length - 1].type = tt.name; + } else { + parseIdentifier(); + } + + if (eat(tt._extends)) { + tsParseType(); + } + if (eat(tt.eq)) { + tsParseType(); + } +} + +export function tsTryParseTypeParameters() { + if (match(tt.lessThan)) { + tsParseTypeParameters(); + } +} + +function tsParseTypeParameters() { + const oldIsType = pushTypeContext(0); + if (match(tt.lessThan) || match(tt.typeParameterStart)) { + next(); + } else { + unexpected(); + } + + while (!eat(tt.greaterThan) && !state.error) { + tsParseTypeParameter(); + eat(tt.comma); + } + popTypeContext(oldIsType); +} + +// Note: In TypeScript implementation we must provide `yieldContext` and `awaitContext`, +// but here it's always false, because this is only used for types. +function tsFillSignature(returnToken) { + // Arrow fns *must* have return token (`=>`). Normal functions can omit it. + const returnTokenRequired = returnToken === tt.arrow; + tsTryParseTypeParameters(); + expect(tt.parenL); + // Create a scope even though we're doing type parsing so we don't accidentally + // treat params as top-level bindings. + state.scopeDepth++; + tsParseBindingListForSignature(false /* isBlockScope */); + state.scopeDepth--; + if (returnTokenRequired) { + tsParseTypeOrTypePredicateAnnotation(returnToken); + } else if (match(returnToken)) { + tsParseTypeOrTypePredicateAnnotation(returnToken); + } +} + +function tsParseBindingListForSignature(isBlockScope) { + parseBindingList(tt.parenR, isBlockScope); +} + +function tsParseTypeMemberSemicolon() { + if (!eat(tt.comma)) { + semicolon(); + } +} + +function tsParseSignatureMember() { + tsFillSignature(tt.colon); + tsParseTypeMemberSemicolon(); +} + +function tsIsUnambiguouslyIndexSignature() { + const snapshot = state.snapshot(); + next(); // Skip '{' + const isIndexSignature = eat(tt.name) && match(tt.colon); + state.restoreFromSnapshot(snapshot); + return isIndexSignature; +} + +function tsTryParseIndexSignature() { + if (!(match(tt.bracketL) && tsIsUnambiguouslyIndexSignature())) { + return false; + } + + const oldIsType = pushTypeContext(0); + + expect(tt.bracketL); + parseIdentifier(); + tsParseTypeAnnotation(); + expect(tt.bracketR); + + tsTryParseTypeAnnotation(); + tsParseTypeMemberSemicolon(); + + popTypeContext(oldIsType); + return true; +} + +function tsParsePropertyOrMethodSignature(isReadonly) { + eat(tt.question); + + if (!isReadonly && (match(tt.parenL) || match(tt.lessThan))) { + tsFillSignature(tt.colon); + tsParseTypeMemberSemicolon(); + } else { + tsTryParseTypeAnnotation(); + tsParseTypeMemberSemicolon(); + } +} + +function tsParseTypeMember() { + if (match(tt.parenL) || match(tt.lessThan)) { + // call signature + tsParseSignatureMember(); + return; + } + if (match(tt._new)) { + next(); + if (match(tt.parenL) || match(tt.lessThan)) { + // constructor signature + tsParseSignatureMember(); + } else { + tsParsePropertyOrMethodSignature(false); + } + return; + } + const readonly = !!tsParseModifier([ContextualKeyword._readonly]); + + const found = tsTryParseIndexSignature(); + if (found) { + return; + } + if ( + (isContextual(ContextualKeyword._get) || isContextual(ContextualKeyword._set)) && + tsNextTokenCanFollowModifier() + ) { + // This is a getter/setter on a type. The tsNextTokenCanFollowModifier + // function already called next() for us, so continue parsing the name. + } + parsePropertyName(-1 /* Types don't need context IDs. */); + tsParsePropertyOrMethodSignature(readonly); +} + +function tsParseTypeLiteral() { + tsParseObjectTypeMembers(); +} + +function tsParseObjectTypeMembers() { + expect(tt.braceL); + while (!eat(tt.braceR) && !state.error) { + tsParseTypeMember(); + } +} + +function tsLookaheadIsStartOfMappedType() { + const snapshot = state.snapshot(); + const isStartOfMappedType = tsIsStartOfMappedType(); + state.restoreFromSnapshot(snapshot); + return isStartOfMappedType; +} + +function tsIsStartOfMappedType() { + next(); + if (eat(tt.plus) || eat(tt.minus)) { + return isContextual(ContextualKeyword._readonly); + } + if (isContextual(ContextualKeyword._readonly)) { + next(); + } + if (!match(tt.bracketL)) { + return false; + } + next(); + if (!tsIsIdentifier()) { + return false; + } + next(); + return match(tt._in); +} + +function tsParseMappedTypeParameter() { + parseIdentifier(); + expect(tt._in); + tsParseType(); +} + +function tsParseMappedType() { + expect(tt.braceL); + if (match(tt.plus) || match(tt.minus)) { + next(); + expectContextual(ContextualKeyword._readonly); + } else { + eatContextual(ContextualKeyword._readonly); + } + expect(tt.bracketL); + tsParseMappedTypeParameter(); + if (eatContextual(ContextualKeyword._as)) { + tsParseType(); + } + expect(tt.bracketR); + if (match(tt.plus) || match(tt.minus)) { + next(); + expect(tt.question); + } else { + eat(tt.question); + } + tsTryParseType(); + semicolon(); + expect(tt.braceR); +} + +function tsParseTupleType() { + expect(tt.bracketL); + while (!eat(tt.bracketR) && !state.error) { + // Do not validate presence of either none or only labeled elements + tsParseTupleElementType(); + eat(tt.comma); + } +} + +function tsParseTupleElementType() { + // parses `...TsType[]` + if (eat(tt.ellipsis)) { + tsParseType(); + } else { + // parses `TsType?` + tsParseType(); + eat(tt.question); + } + + // The type we parsed above was actually a label + if (eat(tt.colon)) { + // Labeled tuple types must affix the label with `...` or `?`, so no need to handle those here + tsParseType(); + } +} + +function tsParseParenthesizedType() { + expect(tt.parenL); + tsParseType(); + expect(tt.parenR); +} + +function tsParseTemplateLiteralType() { + // Finish `, read quasi + nextTemplateToken(); + // Finish quasi, read ${ + nextTemplateToken(); + while (!match(tt.backQuote) && !state.error) { + expect(tt.dollarBraceL); + tsParseType(); + // Finish }, read quasi + nextTemplateToken(); + // Finish quasi, read either ${ or ` + nextTemplateToken(); + } + next(); +} + +var FunctionType; (function (FunctionType) { + const TSFunctionType = 0; FunctionType[FunctionType["TSFunctionType"] = TSFunctionType] = "TSFunctionType"; + const TSConstructorType = TSFunctionType + 1; FunctionType[FunctionType["TSConstructorType"] = TSConstructorType] = "TSConstructorType"; + const TSAbstractConstructorType = TSConstructorType + 1; FunctionType[FunctionType["TSAbstractConstructorType"] = TSAbstractConstructorType] = "TSAbstractConstructorType"; +})(FunctionType || (FunctionType = {})); + +function tsParseFunctionOrConstructorType(type) { + if (type === FunctionType.TSAbstractConstructorType) { + expectContextual(ContextualKeyword._abstract); + } + if (type === FunctionType.TSConstructorType || type === FunctionType.TSAbstractConstructorType) { + expect(tt._new); + } + const oldInDisallowConditionalTypesContext = state.inDisallowConditionalTypesContext; + state.inDisallowConditionalTypesContext = false; + tsFillSignature(tt.arrow); + state.inDisallowConditionalTypesContext = oldInDisallowConditionalTypesContext; +} + +function tsParseNonArrayType() { + switch (state.type) { + case tt.name: + tsParseTypeReference(); + return; + case tt._void: + case tt._null: + next(); + return; + case tt.string: + case tt.num: + case tt.bigint: + case tt.decimal: + case tt._true: + case tt._false: + parseLiteral(); + return; + case tt.minus: + next(); + parseLiteral(); + return; + case tt._this: { + tsParseThisTypeNode(); + if (isContextual(ContextualKeyword._is) && !hasPrecedingLineBreak()) { + tsParseThisTypePredicate(); + } + return; + } + case tt._typeof: + tsParseTypeQuery(); + return; + case tt._import: + tsParseImportType(); + return; + case tt.braceL: + if (tsLookaheadIsStartOfMappedType()) { + tsParseMappedType(); + } else { + tsParseTypeLiteral(); + } + return; + case tt.bracketL: + tsParseTupleType(); + return; + case tt.parenL: + tsParseParenthesizedType(); + return; + case tt.backQuote: + tsParseTemplateLiteralType(); + return; + default: + if (state.type & TokenType.IS_KEYWORD) { + next(); + state.tokens[state.tokens.length - 1].type = tt.name; + return; + } + break; + } + + unexpected(); +} + +function tsParseArrayTypeOrHigher() { + tsParseNonArrayType(); + while (!hasPrecedingLineBreak() && eat(tt.bracketL)) { + if (!eat(tt.bracketR)) { + // If we hit ] immediately, this is an array type, otherwise it's an indexed access type. + tsParseType(); + expect(tt.bracketR); + } + } +} + +function tsParseInferType() { + expectContextual(ContextualKeyword._infer); + parseIdentifier(); + if (match(tt._extends)) { + // Infer type constraints introduce an ambiguity about whether the "extends" + // is a constraint for this infer type or is another conditional type. + const snapshot = state.snapshot(); + expect(tt._extends); + const oldInDisallowConditionalTypesContext = state.inDisallowConditionalTypesContext; + state.inDisallowConditionalTypesContext = true; + tsParseType(); + state.inDisallowConditionalTypesContext = oldInDisallowConditionalTypesContext; + if (state.error || (!state.inDisallowConditionalTypesContext && match(tt.question))) { + state.restoreFromSnapshot(snapshot); + } + } +} + +function tsParseTypeOperatorOrHigher() { + if ( + isContextual(ContextualKeyword._keyof) || + isContextual(ContextualKeyword._unique) || + isContextual(ContextualKeyword._readonly) + ) { + next(); + tsParseTypeOperatorOrHigher(); + } else if (isContextual(ContextualKeyword._infer)) { + tsParseInferType(); + } else { + const oldInDisallowConditionalTypesContext = state.inDisallowConditionalTypesContext; + state.inDisallowConditionalTypesContext = false; + tsParseArrayTypeOrHigher(); + state.inDisallowConditionalTypesContext = oldInDisallowConditionalTypesContext; + } +} + +function tsParseIntersectionTypeOrHigher() { + eat(tt.bitwiseAND); + tsParseTypeOperatorOrHigher(); + if (match(tt.bitwiseAND)) { + while (eat(tt.bitwiseAND)) { + tsParseTypeOperatorOrHigher(); + } + } +} + +function tsParseUnionTypeOrHigher() { + eat(tt.bitwiseOR); + tsParseIntersectionTypeOrHigher(); + if (match(tt.bitwiseOR)) { + while (eat(tt.bitwiseOR)) { + tsParseIntersectionTypeOrHigher(); + } + } +} + +function tsIsStartOfFunctionType() { + if (match(tt.lessThan)) { + return true; + } + return match(tt.parenL) && tsLookaheadIsUnambiguouslyStartOfFunctionType(); +} + +function tsSkipParameterStart() { + if (match(tt.name) || match(tt._this)) { + next(); + return true; + } + // If this is a possible array/object destructure, walk to the matching bracket/brace. + // The next token after will tell us definitively whether this is a function param. + if (match(tt.braceL) || match(tt.bracketL)) { + let depth = 1; + next(); + while (depth > 0 && !state.error) { + if (match(tt.braceL) || match(tt.bracketL)) { + depth++; + } else if (match(tt.braceR) || match(tt.bracketR)) { + depth--; + } + next(); + } + return true; + } + return false; +} + +function tsLookaheadIsUnambiguouslyStartOfFunctionType() { + const snapshot = state.snapshot(); + const isUnambiguouslyStartOfFunctionType = tsIsUnambiguouslyStartOfFunctionType(); + state.restoreFromSnapshot(snapshot); + return isUnambiguouslyStartOfFunctionType; +} + +function tsIsUnambiguouslyStartOfFunctionType() { + next(); + if (match(tt.parenR) || match(tt.ellipsis)) { + // ( ) + // ( ... + return true; + } + if (tsSkipParameterStart()) { + if (match(tt.colon) || match(tt.comma) || match(tt.question) || match(tt.eq)) { + // ( xxx : + // ( xxx , + // ( xxx ? + // ( xxx = + return true; + } + if (match(tt.parenR)) { + next(); + if (match(tt.arrow)) { + // ( xxx ) => + return true; + } + } + } + return false; +} + +function tsParseTypeOrTypePredicateAnnotation(returnToken) { + const oldIsType = pushTypeContext(0); + expect(returnToken); + const finishedReturn = tsParseTypePredicateOrAssertsPrefix(); + if (!finishedReturn) { + tsParseType(); + } + popTypeContext(oldIsType); +} + +function tsTryParseTypeOrTypePredicateAnnotation() { + if (match(tt.colon)) { + tsParseTypeOrTypePredicateAnnotation(tt.colon); + } +} + +export function tsTryParseTypeAnnotation() { + if (match(tt.colon)) { + tsParseTypeAnnotation(); + } +} + +function tsTryParseType() { + if (eat(tt.colon)) { + tsParseType(); + } +} + +/** + * Detect a few special return syntax cases: `x is T`, `asserts x`, `asserts x is T`, + * `asserts this is T`. + * + * Returns true if we parsed the return type, false if there's still a type to be parsed. + */ +function tsParseTypePredicateOrAssertsPrefix() { + const snapshot = state.snapshot(); + if (isContextual(ContextualKeyword._asserts)) { + // Normally this is `asserts x is T`, but at this point, it might be `asserts is T` (a user- + // defined type guard on the `asserts` variable) or just a type called `asserts`. + next(); + if (eatContextual(ContextualKeyword._is)) { + // If we see `asserts is`, then this must be of the form `asserts is T`, since + // `asserts is is T` isn't valid. + tsParseType(); + return true; + } else if (tsIsIdentifier() || match(tt._this)) { + next(); + if (eatContextual(ContextualKeyword._is)) { + // If we see `is`, then this is `asserts x is T`. Otherwise, it's `asserts x`. + tsParseType(); + } + return true; + } else { + // Regular type, so bail out and start type parsing from scratch. + state.restoreFromSnapshot(snapshot); + return false; + } + } else if (tsIsIdentifier() || match(tt._this)) { + // This is a regular identifier, which may or may not have "is" after it. + next(); + if (isContextual(ContextualKeyword._is) && !hasPrecedingLineBreak()) { + next(); + tsParseType(); + return true; + } else { + // Regular type, so bail out and start type parsing from scratch. + state.restoreFromSnapshot(snapshot); + return false; + } + } + return false; +} + +export function tsParseTypeAnnotation() { + const oldIsType = pushTypeContext(0); + expect(tt.colon); + tsParseType(); + popTypeContext(oldIsType); +} + +export function tsParseType() { + tsParseNonConditionalType(); + if (state.inDisallowConditionalTypesContext || hasPrecedingLineBreak() || !eat(tt._extends)) { + return; + } + // extends type + const oldInDisallowConditionalTypesContext = state.inDisallowConditionalTypesContext; + state.inDisallowConditionalTypesContext = true; + tsParseNonConditionalType(); + state.inDisallowConditionalTypesContext = oldInDisallowConditionalTypesContext; + + expect(tt.question); + // true type + tsParseType(); + expect(tt.colon); + // false type + tsParseType(); +} + +function isAbstractConstructorSignature() { + return isContextual(ContextualKeyword._abstract) && lookaheadType() === tt._new; +} + +export function tsParseNonConditionalType() { + if (tsIsStartOfFunctionType()) { + tsParseFunctionOrConstructorType(FunctionType.TSFunctionType); + return; + } + if (match(tt._new)) { + // As in `new () => Date` + tsParseFunctionOrConstructorType(FunctionType.TSConstructorType); + return; + } else if (isAbstractConstructorSignature()) { + // As in `abstract new () => Date` + tsParseFunctionOrConstructorType(FunctionType.TSAbstractConstructorType); + return; + } + tsParseUnionTypeOrHigher(); +} + +export function tsParseTypeAssertion() { + const oldIsType = pushTypeContext(1); + tsParseType(); + expect(tt.greaterThan); + popTypeContext(oldIsType); + parseMaybeUnary(); +} + +export function tsTryParseJSXTypeArgument() { + if (eat(tt.jsxTagStart)) { + state.tokens[state.tokens.length - 1].type = tt.typeParameterStart; + const oldIsType = pushTypeContext(1); + while (!match(tt.greaterThan) && !state.error) { + tsParseType(); + eat(tt.comma); + } + // Process >, but the one after needs to be parsed JSX-style. + nextJSXTagToken(); + popTypeContext(oldIsType); + } +} + +function tsParseHeritageClause() { + while (!match(tt.braceL) && !state.error) { + tsParseExpressionWithTypeArguments(); + eat(tt.comma); + } +} + +function tsParseExpressionWithTypeArguments() { + // Note: TS uses parseLeftHandSideExpressionOrHigher, + // then has grammar errors later if it's not an EntityName. + tsParseEntityName(); + if (match(tt.lessThan)) { + tsParseTypeArguments(); + } +} + +function tsParseInterfaceDeclaration() { + parseBindingIdentifier(false); + tsTryParseTypeParameters(); + if (eat(tt._extends)) { + tsParseHeritageClause(); + } + tsParseObjectTypeMembers(); +} + +function tsParseTypeAliasDeclaration() { + parseBindingIdentifier(false); + tsTryParseTypeParameters(); + expect(tt.eq); + tsParseType(); + semicolon(); +} + +function tsParseEnumMember() { + // Computed property names are grammar errors in an enum, so accept just string literal or identifier. + if (match(tt.string)) { + parseLiteral(); + } else { + parseIdentifier(); + } + if (eat(tt.eq)) { + const eqIndex = state.tokens.length - 1; + parseMaybeAssign(); + state.tokens[eqIndex].rhsEndIndex = state.tokens.length; + } +} + +function tsParseEnumDeclaration() { + parseBindingIdentifier(false); + expect(tt.braceL); + while (!eat(tt.braceR) && !state.error) { + tsParseEnumMember(); + eat(tt.comma); + } +} + +function tsParseModuleBlock() { + expect(tt.braceL); + parseBlockBody(/* end */ tt.braceR); +} + +function tsParseModuleOrNamespaceDeclaration() { + parseBindingIdentifier(false); + if (eat(tt.dot)) { + tsParseModuleOrNamespaceDeclaration(); + } else { + tsParseModuleBlock(); + } +} + +function tsParseAmbientExternalModuleDeclaration() { + if (isContextual(ContextualKeyword._global)) { + parseIdentifier(); + } else if (match(tt.string)) { + parseExprAtom(); + } else { + unexpected(); + } + + if (match(tt.braceL)) { + tsParseModuleBlock(); + } else { + semicolon(); + } +} + +export function tsParseImportEqualsDeclaration() { + parseImportedIdentifier(); + expect(tt.eq); + tsParseModuleReference(); + semicolon(); +} + +function tsIsExternalModuleReference() { + return isContextual(ContextualKeyword._require) && lookaheadType() === tt.parenL; +} + +function tsParseModuleReference() { + if (tsIsExternalModuleReference()) { + tsParseExternalModuleReference(); + } else { + tsParseEntityName(); + } +} + +function tsParseExternalModuleReference() { + expectContextual(ContextualKeyword._require); + expect(tt.parenL); + if (!match(tt.string)) { + unexpected(); + } + parseLiteral(); + expect(tt.parenR); +} + +// Utilities + +// Returns true if a statement matched. +function tsTryParseDeclare() { + if (isLineTerminator()) { + return false; + } + switch (state.type) { + case tt._function: { + const oldIsType = pushTypeContext(1); + next(); + // We don't need to precisely get the function start here, since it's only used to mark + // the function as a type if it's bodiless, and it's already a type here. + const functionStart = state.start; + parseFunction(functionStart, /* isStatement */ true); + popTypeContext(oldIsType); + return true; + } + case tt._class: { + const oldIsType = pushTypeContext(1); + parseClass(/* isStatement */ true, /* optionalId */ false); + popTypeContext(oldIsType); + return true; + } + case tt._const: { + if (match(tt._const) && isLookaheadContextual(ContextualKeyword._enum)) { + const oldIsType = pushTypeContext(1); + // `const enum = 0;` not allowed because "enum" is a strict mode reserved word. + expect(tt._const); + expectContextual(ContextualKeyword._enum); + state.tokens[state.tokens.length - 1].type = tt._enum; + tsParseEnumDeclaration(); + popTypeContext(oldIsType); + return true; + } + } + // falls through + case tt._var: + case tt._let: { + const oldIsType = pushTypeContext(1); + parseVarStatement(state.type !== tt._var); + popTypeContext(oldIsType); + return true; + } + case tt.name: { + const oldIsType = pushTypeContext(1); + const contextualKeyword = state.contextualKeyword; + let matched = false; + if (contextualKeyword === ContextualKeyword._global) { + tsParseAmbientExternalModuleDeclaration(); + matched = true; + } else { + matched = tsParseDeclaration(contextualKeyword, /* isBeforeToken */ true); + } + popTypeContext(oldIsType); + return matched; + } + default: + return false; + } +} + +// Note: this won't be called unless the keyword is allowed in `shouldParseExportDeclaration`. +// Returns true if it matched a declaration. +function tsTryParseExportDeclaration() { + return tsParseDeclaration(state.contextualKeyword, /* isBeforeToken */ true); +} + +// Returns true if it matched a statement. +function tsParseExpressionStatement(contextualKeyword) { + switch (contextualKeyword) { + case ContextualKeyword._declare: { + const declareTokenIndex = state.tokens.length - 1; + const matched = tsTryParseDeclare(); + if (matched) { + state.tokens[declareTokenIndex].type = tt._declare; + return true; + } + break; + } + case ContextualKeyword._global: + // `global { }` (with no `declare`) may appear inside an ambient module declaration. + // Would like to use tsParseAmbientExternalModuleDeclaration here, but already ran past "global". + if (match(tt.braceL)) { + tsParseModuleBlock(); + return true; + } + break; + + default: + return tsParseDeclaration(contextualKeyword, /* isBeforeToken */ false); + } + return false; +} + +/** + * Common code for parsing a declaration. + * + * isBeforeToken indicates that the current parser state is at the contextual + * keyword (and that it is not yet emitted) rather than reading the token after + * it. When isBeforeToken is true, we may be preceded by an `export` token and + * should include that token in a type context we create, e.g. to handle + * `export interface` or `export type`. (This is a bit of a hack and should be + * cleaned up at some point.) + * + * Returns true if it matched a declaration. + */ +function tsParseDeclaration(contextualKeyword, isBeforeToken) { + switch (contextualKeyword) { + case ContextualKeyword._abstract: + if (tsCheckLineTerminator(isBeforeToken) && match(tt._class)) { + state.tokens[state.tokens.length - 1].type = tt._abstract; + parseClass(/* isStatement */ true, /* optionalId */ false); + return true; + } + break; + + case ContextualKeyword._enum: + if (tsCheckLineTerminator(isBeforeToken) && match(tt.name)) { + state.tokens[state.tokens.length - 1].type = tt._enum; + tsParseEnumDeclaration(); + return true; + } + break; + + case ContextualKeyword._interface: + if (tsCheckLineTerminator(isBeforeToken) && match(tt.name)) { + // `next` is true in "export" and "declare" contexts, so we want to remove that token + // as well. + const oldIsType = pushTypeContext(isBeforeToken ? 2 : 1); + tsParseInterfaceDeclaration(); + popTypeContext(oldIsType); + return true; + } + break; + + case ContextualKeyword._module: + if (tsCheckLineTerminator(isBeforeToken)) { + if (match(tt.string)) { + const oldIsType = pushTypeContext(isBeforeToken ? 2 : 1); + tsParseAmbientExternalModuleDeclaration(); + popTypeContext(oldIsType); + return true; + } else if (match(tt.name)) { + const oldIsType = pushTypeContext(isBeforeToken ? 2 : 1); + tsParseModuleOrNamespaceDeclaration(); + popTypeContext(oldIsType); + return true; + } + } + break; + + case ContextualKeyword._namespace: + if (tsCheckLineTerminator(isBeforeToken) && match(tt.name)) { + const oldIsType = pushTypeContext(isBeforeToken ? 2 : 1); + tsParseModuleOrNamespaceDeclaration(); + popTypeContext(oldIsType); + return true; + } + break; + + case ContextualKeyword._type: + if (tsCheckLineTerminator(isBeforeToken) && match(tt.name)) { + const oldIsType = pushTypeContext(isBeforeToken ? 2 : 1); + tsParseTypeAliasDeclaration(); + popTypeContext(oldIsType); + return true; + } + break; + + default: + break; + } + return false; +} + +function tsCheckLineTerminator(isBeforeToken) { + if (isBeforeToken) { + // Babel checks hasFollowingLineBreak here and returns false, but this + // doesn't actually come up, e.g. `export interface` can never be on its own + // line in valid code. + next(); + return true; + } else { + return !isLineTerminator(); + } +} + +// Returns true if there was a generic async arrow function. +function tsTryParseGenericAsyncArrowFunction() { + const snapshot = state.snapshot(); + + tsParseTypeParameters(); + parseFunctionParams(); + tsTryParseTypeOrTypePredicateAnnotation(); + expect(tt.arrow); + + if (state.error) { + state.restoreFromSnapshot(snapshot); + return false; + } + + parseFunctionBody(true); + return true; +} + +/** + * If necessary, hack the tokenizer state so that this bitshift was actually a + * less-than token, then keep parsing. This should only be used in situations + * where we restore from snapshot on error (which reverts this change) or + * where bitshift would be illegal anyway (e.g. in a class "extends" clause). + * + * This hack is useful to handle situations like foo<() => void>() where + * there can legitimately be two open-angle-brackets in a row in TS. + */ +function tsParseTypeArgumentsWithPossibleBitshift() { + if (state.type === tt.bitShiftL) { + state.pos -= 1; + finishToken(tt.lessThan); + } + tsParseTypeArguments(); +} + +function tsParseTypeArguments() { + const oldIsType = pushTypeContext(0); + expect(tt.lessThan); + while (!match(tt.greaterThan) && !state.error) { + tsParseType(); + eat(tt.comma); + } + if (!oldIsType) { + // If the type arguments are present in an expression context, e.g. + // f(), then the > sign should be tokenized as a non-type token. + // In particular, f(a < b, c >= d) should parse the >= as a single token, + // resulting in a syntax error and fallback to the non-type-args + // interpretation. In the success case, even though the > is tokenized as a + // non-type token, it still must be marked as a type token so that it is + // erased. + popTypeContext(oldIsType); + rescan_gt(); + expect(tt.greaterThan); + state.tokens[state.tokens.length - 1].isType = true; + } else { + expect(tt.greaterThan); + popTypeContext(oldIsType); + } +} + +export function tsIsDeclarationStart() { + if (match(tt.name)) { + switch (state.contextualKeyword) { + case ContextualKeyword._abstract: + case ContextualKeyword._declare: + case ContextualKeyword._enum: + case ContextualKeyword._interface: + case ContextualKeyword._module: + case ContextualKeyword._namespace: + case ContextualKeyword._type: + return true; + default: + break; + } + } + + return false; +} + +// ====================================================== +// OVERRIDES +// ====================================================== + +export function tsParseFunctionBodyAndFinish(functionStart, funcContextId) { + // For arrow functions, `parseArrow` handles the return type itself. + if (match(tt.colon)) { + tsParseTypeOrTypePredicateAnnotation(tt.colon); + } + + // The original code checked the node type to make sure this function type allows a missing + // body, but we skip that to avoid sending around the node type. We instead just use the + // allowExpressionBody boolean to make sure it's not an arrow function. + if (!match(tt.braceL) && isLineTerminator()) { + // Retroactively mark the function declaration as a type. + let i = state.tokens.length - 1; + while ( + i >= 0 && + (state.tokens[i].start >= functionStart || + state.tokens[i].type === tt._default || + state.tokens[i].type === tt._export) + ) { + state.tokens[i].isType = true; + i--; + } + return; + } + + parseFunctionBody(false, funcContextId); +} + +export function tsParseSubscript( + startTokenIndex, + noCalls, + stopState, +) { + if (!hasPrecedingLineBreak() && eat(tt.bang)) { + state.tokens[state.tokens.length - 1].type = tt.nonNullAssertion; + return; + } + + if (match(tt.lessThan) || match(tt.bitShiftL)) { + // There are number of things we are going to "maybe" parse, like type arguments on + // tagged template expressions. If any of them fail, walk it back and continue. + const snapshot = state.snapshot(); + + if (!noCalls && atPossibleAsync()) { + // Almost certainly this is a generic async function `async () => ... + // But it might be a call with a type argument `async();` + const asyncArrowFn = tsTryParseGenericAsyncArrowFunction(); + if (asyncArrowFn) { + return; + } + } + tsParseTypeArgumentsWithPossibleBitshift(); + if (!noCalls && eat(tt.parenL)) { + // With f(), the subscriptStartIndex marker is on the ( token. + state.tokens[state.tokens.length - 1].subscriptStartIndex = startTokenIndex; + parseCallExpressionArguments(); + } else if (match(tt.backQuote)) { + // Tagged template with a type argument. + parseTemplate(); + } else if ( + // The remaining possible case is an instantiation expression, e.g. + // Array . Check for a few cases that would disqualify it and + // cause us to bail out. + // a>c is not (a)>c, but a<(b>>c) + state.type === tt.greaterThan || + // ac is (ac + (state.type !== tt.parenL && + Boolean(state.type & TokenType.IS_EXPRESSION_START) && + !hasPrecedingLineBreak()) + ) { + // Bail out. We have something like ac, which is not an expression with + // type arguments but an (a < b) > c comparison. + unexpected(); + } + + if (state.error) { + state.restoreFromSnapshot(snapshot); + } else { + return; + } + } else if (!noCalls && match(tt.questionDot) && lookaheadType() === tt.lessThan) { + // If we see f?.<, then this must be an optional call with a type argument. + next(); + state.tokens[startTokenIndex].isOptionalChainStart = true; + // With f?.(), the subscriptStartIndex marker is on the ?. token. + state.tokens[state.tokens.length - 1].subscriptStartIndex = startTokenIndex; + + tsParseTypeArguments(); + expect(tt.parenL); + parseCallExpressionArguments(); + } + baseParseSubscript(startTokenIndex, noCalls, stopState); +} + +export function tsTryParseExport() { + if (eat(tt._import)) { + // One of these cases: + // export import A = B; + // export import type A = require("A"); + if (isContextual(ContextualKeyword._type) && lookaheadType() !== tt.eq) { + // Eat a `type` token, unless it's actually an identifier name. + expectContextual(ContextualKeyword._type); + } + tsParseImportEqualsDeclaration(); + return true; + } else if (eat(tt.eq)) { + // `export = x;` + parseExpression(); + semicolon(); + return true; + } else if (eatContextual(ContextualKeyword._as)) { + // `export as namespace A;` + // See `parseNamespaceExportDeclaration` in TypeScript's own parser + expectContextual(ContextualKeyword._namespace); + parseIdentifier(); + semicolon(); + return true; + } else { + if (isContextual(ContextualKeyword._type)) { + const nextType = lookaheadType(); + // export type {foo} from 'a'; + // export type * from 'a';' + // export type * as ns from 'a';' + if (nextType === tt.braceL || nextType === tt.star) { + next(); + } + } + return false; + } +} + +/** + * Parse a TS import specifier, which may be prefixed with "type" and may be of + * the form `foo as bar`. + * + * The number of identifier-like tokens we see happens to be enough to uniquely + * identify the form, so simply count the number of identifiers rather than + * matching the words `type` or `as`. This is particularly important because + * `type` and `as` could each actually be plain identifiers rather than + * keywords. + */ +export function tsParseImportSpecifier() { + parseIdentifier(); + if (match(tt.comma) || match(tt.braceR)) { + // import {foo} + state.tokens[state.tokens.length - 1].identifierRole = IdentifierRole.ImportDeclaration; + return; + } + parseIdentifier(); + if (match(tt.comma) || match(tt.braceR)) { + // import {type foo} + state.tokens[state.tokens.length - 1].identifierRole = IdentifierRole.ImportDeclaration; + state.tokens[state.tokens.length - 2].isType = true; + state.tokens[state.tokens.length - 1].isType = true; + return; + } + parseIdentifier(); + if (match(tt.comma) || match(tt.braceR)) { + // import {foo as bar} + state.tokens[state.tokens.length - 3].identifierRole = IdentifierRole.ImportAccess; + state.tokens[state.tokens.length - 1].identifierRole = IdentifierRole.ImportDeclaration; + return; + } + parseIdentifier(); + // import {type foo as bar} + state.tokens[state.tokens.length - 3].identifierRole = IdentifierRole.ImportAccess; + state.tokens[state.tokens.length - 1].identifierRole = IdentifierRole.ImportDeclaration; + state.tokens[state.tokens.length - 4].isType = true; + state.tokens[state.tokens.length - 3].isType = true; + state.tokens[state.tokens.length - 2].isType = true; + state.tokens[state.tokens.length - 1].isType = true; +} + +/** + * Just like named import specifiers, export specifiers can have from 1 to 4 + * tokens, inclusive, and the number of tokens determines the role of each token. + */ +export function tsParseExportSpecifier() { + parseIdentifier(); + if (match(tt.comma) || match(tt.braceR)) { + // export {foo} + state.tokens[state.tokens.length - 1].identifierRole = IdentifierRole.ExportAccess; + return; + } + parseIdentifier(); + if (match(tt.comma) || match(tt.braceR)) { + // export {type foo} + state.tokens[state.tokens.length - 1].identifierRole = IdentifierRole.ExportAccess; + state.tokens[state.tokens.length - 2].isType = true; + state.tokens[state.tokens.length - 1].isType = true; + return; + } + parseIdentifier(); + if (match(tt.comma) || match(tt.braceR)) { + // export {foo as bar} + state.tokens[state.tokens.length - 3].identifierRole = IdentifierRole.ExportAccess; + return; + } + parseIdentifier(); + // export {type foo as bar} + state.tokens[state.tokens.length - 3].identifierRole = IdentifierRole.ExportAccess; + state.tokens[state.tokens.length - 4].isType = true; + state.tokens[state.tokens.length - 3].isType = true; + state.tokens[state.tokens.length - 2].isType = true; + state.tokens[state.tokens.length - 1].isType = true; +} + +export function tsTryParseExportDefaultExpression() { + if (isContextual(ContextualKeyword._abstract) && lookaheadType() === tt._class) { + state.type = tt._abstract; + next(); // Skip "abstract" + parseClass(true, true); + return true; + } + if (isContextual(ContextualKeyword._interface)) { + // Make sure "export default" are considered type tokens so the whole thing is removed. + const oldIsType = pushTypeContext(2); + tsParseDeclaration(ContextualKeyword._interface, true); + popTypeContext(oldIsType); + return true; + } + return false; +} + +export function tsTryParseStatementContent() { + if (state.type === tt._const) { + const ahead = lookaheadTypeAndKeyword(); + if (ahead.type === tt.name && ahead.contextualKeyword === ContextualKeyword._enum) { + expect(tt._const); + expectContextual(ContextualKeyword._enum); + state.tokens[state.tokens.length - 1].type = tt._enum; + tsParseEnumDeclaration(); + return true; + } + } + return false; +} + +export function tsTryParseClassMemberWithIsStatic(isStatic) { + const memberStartIndexAfterStatic = state.tokens.length; + tsParseModifiers([ + ContextualKeyword._abstract, + ContextualKeyword._readonly, + ContextualKeyword._declare, + ContextualKeyword._static, + ContextualKeyword._override, + ]); + + const modifiersEndIndex = state.tokens.length; + const found = tsTryParseIndexSignature(); + if (found) { + // Index signatures are type declarations, so set the modifier tokens as + // type tokens. Most tokens could be assumed to be type tokens, but `static` + // is ambiguous unless we set it explicitly here. + const memberStartIndex = isStatic + ? memberStartIndexAfterStatic - 1 + : memberStartIndexAfterStatic; + for (let i = memberStartIndex; i < modifiersEndIndex; i++) { + state.tokens[i].isType = true; + } + return true; + } + return false; +} + +// Note: The reason we do this in `parseIdentifierStatement` and not `parseStatement` +// is that e.g. `type()` is valid JS, so we must try parsing that first. +// If it's really a type, we will parse `type` as the statement, and can correct it here +// by parsing the rest. +export function tsParseIdentifierStatement(contextualKeyword) { + const matched = tsParseExpressionStatement(contextualKeyword); + if (!matched) { + semicolon(); + } +} + +export function tsParseExportDeclaration() { + // "export declare" is equivalent to just "export". + const isDeclare = eatContextual(ContextualKeyword._declare); + if (isDeclare) { + state.tokens[state.tokens.length - 1].type = tt._declare; + } + + let matchedDeclaration = false; + if (match(tt.name)) { + if (isDeclare) { + const oldIsType = pushTypeContext(2); + matchedDeclaration = tsTryParseExportDeclaration(); + popTypeContext(oldIsType); + } else { + matchedDeclaration = tsTryParseExportDeclaration(); + } + } + if (!matchedDeclaration) { + if (isDeclare) { + const oldIsType = pushTypeContext(2); + parseStatement(true); + popTypeContext(oldIsType); + } else { + parseStatement(true); + } + } +} + +export function tsAfterParseClassSuper(hasSuper) { + if (hasSuper && (match(tt.lessThan) || match(tt.bitShiftL))) { + tsParseTypeArgumentsWithPossibleBitshift(); + } + if (eatContextual(ContextualKeyword._implements)) { + state.tokens[state.tokens.length - 1].type = tt._implements; + const oldIsType = pushTypeContext(1); + tsParseHeritageClause(); + popTypeContext(oldIsType); + } +} + +export function tsStartParseObjPropValue() { + tsTryParseTypeParameters(); +} + +export function tsStartParseFunctionParams() { + tsTryParseTypeParameters(); +} + +// `let x: number;` +export function tsAfterParseVarHead() { + const oldIsType = pushTypeContext(0); + if (!hasPrecedingLineBreak()) { + eat(tt.bang); + } + tsTryParseTypeAnnotation(); + popTypeContext(oldIsType); +} + +// parse the return type of an async arrow function - let foo = (async (): number => {}); +export function tsStartParseAsyncArrowFromCallExpression() { + if (match(tt.colon)) { + tsParseTypeAnnotation(); + } +} + +// Returns true if the expression was an arrow function. +export function tsParseMaybeAssign(noIn, isWithinParens) { + // Note: When the JSX plugin is on, type assertions (` x`) aren't valid syntax. + if (isJSXEnabled) { + return tsParseMaybeAssignWithJSX(noIn, isWithinParens); + } else { + return tsParseMaybeAssignWithoutJSX(noIn, isWithinParens); + } +} + +export function tsParseMaybeAssignWithJSX(noIn, isWithinParens) { + if (!match(tt.lessThan)) { + return baseParseMaybeAssign(noIn, isWithinParens); + } + + // Prefer to parse JSX if possible. But may be an arrow fn. + const snapshot = state.snapshot(); + let wasArrow = baseParseMaybeAssign(noIn, isWithinParens); + if (state.error) { + state.restoreFromSnapshot(snapshot); + } else { + return wasArrow; + } + + // Otherwise, try as type-parameterized arrow function. + state.type = tt.typeParameterStart; + // This is similar to TypeScript's `tryParseParenthesizedArrowFunctionExpression`. + tsParseTypeParameters(); + wasArrow = baseParseMaybeAssign(noIn, isWithinParens); + if (!wasArrow) { + unexpected(); + } + + return wasArrow; +} + +export function tsParseMaybeAssignWithoutJSX(noIn, isWithinParens) { + if (!match(tt.lessThan)) { + return baseParseMaybeAssign(noIn, isWithinParens); + } + + const snapshot = state.snapshot(); + // This is similar to TypeScript's `tryParseParenthesizedArrowFunctionExpression`. + tsParseTypeParameters(); + const wasArrow = baseParseMaybeAssign(noIn, isWithinParens); + if (!wasArrow) { + unexpected(); + } + if (state.error) { + state.restoreFromSnapshot(snapshot); + } else { + return wasArrow; + } + + // Try parsing a type cast instead of an arrow function. + // This will start with a type assertion (via parseMaybeUnary). + // But don't directly call `tsParseTypeAssertion` because we want to handle any binary after it. + return baseParseMaybeAssign(noIn, isWithinParens); +} + +export function tsParseArrow() { + if (match(tt.colon)) { + // This is different from how the TS parser does it. + // TS uses lookahead. Babylon parses it as a parenthesized expression and converts. + const snapshot = state.snapshot(); + + tsParseTypeOrTypePredicateAnnotation(tt.colon); + if (canInsertSemicolon()) unexpected(); + if (!match(tt.arrow)) unexpected(); + + if (state.error) { + state.restoreFromSnapshot(snapshot); + } + } + return eat(tt.arrow); +} + +// Allow type annotations inside of a parameter list. +export function tsParseAssignableListItemTypes() { + const oldIsType = pushTypeContext(0); + eat(tt.question); + tsTryParseTypeAnnotation(); + popTypeContext(oldIsType); +} + +export function tsParseMaybeDecoratorArguments() { + if (match(tt.lessThan) || match(tt.bitShiftL)) { + tsParseTypeArgumentsWithPossibleBitshift(); + } + baseParseMaybeDecoratorArguments(); +} Index: frontend/node_modules/sucrase/dist/esm/parser/tokenizer/index.js =================================================================== --- frontend/node_modules/sucrase/dist/esm/parser/tokenizer/index.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/esm/parser/tokenizer/index.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,1004 @@ +/* eslint max-len: 0 */ + +import {input, isFlowEnabled, state} from "../traverser/base"; +import {unexpected} from "../traverser/util"; +import {charCodes} from "../util/charcodes"; +import {IS_IDENTIFIER_CHAR, IS_IDENTIFIER_START} from "../util/identifier"; +import {IS_WHITESPACE, skipWhiteSpace} from "../util/whitespace"; +import {ContextualKeyword} from "./keywords"; +import readWord from "./readWord"; +import { TokenType as tt} from "./types"; + +export var IdentifierRole; (function (IdentifierRole) { + const Access = 0; IdentifierRole[IdentifierRole["Access"] = Access] = "Access"; + const ExportAccess = Access + 1; IdentifierRole[IdentifierRole["ExportAccess"] = ExportAccess] = "ExportAccess"; + const TopLevelDeclaration = ExportAccess + 1; IdentifierRole[IdentifierRole["TopLevelDeclaration"] = TopLevelDeclaration] = "TopLevelDeclaration"; + const FunctionScopedDeclaration = TopLevelDeclaration + 1; IdentifierRole[IdentifierRole["FunctionScopedDeclaration"] = FunctionScopedDeclaration] = "FunctionScopedDeclaration"; + const BlockScopedDeclaration = FunctionScopedDeclaration + 1; IdentifierRole[IdentifierRole["BlockScopedDeclaration"] = BlockScopedDeclaration] = "BlockScopedDeclaration"; + const ObjectShorthandTopLevelDeclaration = BlockScopedDeclaration + 1; IdentifierRole[IdentifierRole["ObjectShorthandTopLevelDeclaration"] = ObjectShorthandTopLevelDeclaration] = "ObjectShorthandTopLevelDeclaration"; + const ObjectShorthandFunctionScopedDeclaration = ObjectShorthandTopLevelDeclaration + 1; IdentifierRole[IdentifierRole["ObjectShorthandFunctionScopedDeclaration"] = ObjectShorthandFunctionScopedDeclaration] = "ObjectShorthandFunctionScopedDeclaration"; + const ObjectShorthandBlockScopedDeclaration = ObjectShorthandFunctionScopedDeclaration + 1; IdentifierRole[IdentifierRole["ObjectShorthandBlockScopedDeclaration"] = ObjectShorthandBlockScopedDeclaration] = "ObjectShorthandBlockScopedDeclaration"; + const ObjectShorthand = ObjectShorthandBlockScopedDeclaration + 1; IdentifierRole[IdentifierRole["ObjectShorthand"] = ObjectShorthand] = "ObjectShorthand"; + // Any identifier bound in an import statement, e.g. both A and b from + // `import A, * as b from 'A';` + const ImportDeclaration = ObjectShorthand + 1; IdentifierRole[IdentifierRole["ImportDeclaration"] = ImportDeclaration] = "ImportDeclaration"; + const ObjectKey = ImportDeclaration + 1; IdentifierRole[IdentifierRole["ObjectKey"] = ObjectKey] = "ObjectKey"; + // The `foo` in `import {foo as bar} from "./abc";`. + const ImportAccess = ObjectKey + 1; IdentifierRole[IdentifierRole["ImportAccess"] = ImportAccess] = "ImportAccess"; +})(IdentifierRole || (IdentifierRole = {})); + +/** + * Extra information on jsxTagStart tokens, used to determine which of the three + * jsx functions are called in the automatic transform. + */ +export var JSXRole; (function (JSXRole) { + // The element is self-closing or has a body that resolves to empty. We + // shouldn't emit children at all in this case. + const NoChildren = 0; JSXRole[JSXRole["NoChildren"] = NoChildren] = "NoChildren"; + // The element has a single explicit child, which might still be an arbitrary + // expression like an array. We should emit that expression as the children. + const OneChild = NoChildren + 1; JSXRole[JSXRole["OneChild"] = OneChild] = "OneChild"; + // The element has at least two explicitly-specified children or has spread + // children, so child positions are assumed to be "static". We should wrap + // these children in an array. + const StaticChildren = OneChild + 1; JSXRole[JSXRole["StaticChildren"] = StaticChildren] = "StaticChildren"; + // The element has a prop named "key" after a prop spread, so we should fall + // back to the createElement function. + const KeyAfterPropSpread = StaticChildren + 1; JSXRole[JSXRole["KeyAfterPropSpread"] = KeyAfterPropSpread] = "KeyAfterPropSpread"; +})(JSXRole || (JSXRole = {})); + +export function isDeclaration(token) { + const role = token.identifierRole; + return ( + role === IdentifierRole.TopLevelDeclaration || + role === IdentifierRole.FunctionScopedDeclaration || + role === IdentifierRole.BlockScopedDeclaration || + role === IdentifierRole.ObjectShorthandTopLevelDeclaration || + role === IdentifierRole.ObjectShorthandFunctionScopedDeclaration || + role === IdentifierRole.ObjectShorthandBlockScopedDeclaration + ); +} + +export function isNonTopLevelDeclaration(token) { + const role = token.identifierRole; + return ( + role === IdentifierRole.FunctionScopedDeclaration || + role === IdentifierRole.BlockScopedDeclaration || + role === IdentifierRole.ObjectShorthandFunctionScopedDeclaration || + role === IdentifierRole.ObjectShorthandBlockScopedDeclaration + ); +} + +export function isTopLevelDeclaration(token) { + const role = token.identifierRole; + return ( + role === IdentifierRole.TopLevelDeclaration || + role === IdentifierRole.ObjectShorthandTopLevelDeclaration || + role === IdentifierRole.ImportDeclaration + ); +} + +export function isBlockScopedDeclaration(token) { + const role = token.identifierRole; + // Treat top-level declarations as block scope since the distinction doesn't matter here. + return ( + role === IdentifierRole.TopLevelDeclaration || + role === IdentifierRole.BlockScopedDeclaration || + role === IdentifierRole.ObjectShorthandTopLevelDeclaration || + role === IdentifierRole.ObjectShorthandBlockScopedDeclaration + ); +} + +export function isFunctionScopedDeclaration(token) { + const role = token.identifierRole; + return ( + role === IdentifierRole.FunctionScopedDeclaration || + role === IdentifierRole.ObjectShorthandFunctionScopedDeclaration + ); +} + +export function isObjectShorthandDeclaration(token) { + return ( + token.identifierRole === IdentifierRole.ObjectShorthandTopLevelDeclaration || + token.identifierRole === IdentifierRole.ObjectShorthandBlockScopedDeclaration || + token.identifierRole === IdentifierRole.ObjectShorthandFunctionScopedDeclaration + ); +} + +// Object type used to represent tokens. Note that normally, tokens +// simply exist as properties on the parser object. This is only +// used for the onToken callback and the external tokenizer. +export class Token { + constructor() { + this.type = state.type; + this.contextualKeyword = state.contextualKeyword; + this.start = state.start; + this.end = state.end; + this.scopeDepth = state.scopeDepth; + this.isType = state.isType; + this.identifierRole = null; + this.jsxRole = null; + this.shadowsGlobal = false; + this.isAsyncOperation = false; + this.contextId = null; + this.rhsEndIndex = null; + this.isExpression = false; + this.numNullishCoalesceStarts = 0; + this.numNullishCoalesceEnds = 0; + this.isOptionalChainStart = false; + this.isOptionalChainEnd = false; + this.subscriptStartIndex = null; + this.nullishStartIndex = null; + } + + + + + + + + + + // Initially false for all tokens, then may be computed in a follow-up step that does scope + // analysis. + + // Initially false for all tokens, but may be set during transform to mark it as containing an + // await operation. + + + // For assignments, the index of the RHS. For export tokens, the end of the export. + + // For class tokens, records if the class is a class expression or a class statement. + + // Number of times to insert a `nullishCoalesce(` snippet before this token. + + // Number of times to insert a `)` snippet after this token. + + // If true, insert an `optionalChain([` snippet before this token. + + // If true, insert a `])` snippet after this token. + + // Tag for `.`, `?.`, `[`, `?.[`, `(`, and `?.(` to denote the "root" token for this + // subscript chain. This can be used to determine if this chain is an optional chain. + + // Tag for `??` operators to denote the root token for this nullish coalescing call. + +} + +// ## Tokenizer + +// Move to the next token +export function next() { + state.tokens.push(new Token()); + nextToken(); +} + +// Call instead of next when inside a template, since that needs to be handled differently. +export function nextTemplateToken() { + state.tokens.push(new Token()); + state.start = state.pos; + readTmplToken(); +} + +// The tokenizer never parses regexes by default. Instead, the parser is responsible for +// instructing it to parse a regex when we see a slash at the start of an expression. +export function retokenizeSlashAsRegex() { + if (state.type === tt.assign) { + --state.pos; + } + readRegexp(); +} + +export function pushTypeContext(existingTokensInType) { + for (let i = state.tokens.length - existingTokensInType; i < state.tokens.length; i++) { + state.tokens[i].isType = true; + } + const oldIsType = state.isType; + state.isType = true; + return oldIsType; +} + +export function popTypeContext(oldIsType) { + state.isType = oldIsType; +} + +export function eat(type) { + if (match(type)) { + next(); + return true; + } else { + return false; + } +} + +export function eatTypeToken(tokenType) { + const oldIsType = state.isType; + state.isType = true; + eat(tokenType); + state.isType = oldIsType; +} + +export function match(type) { + return state.type === type; +} + +export function lookaheadType() { + const snapshot = state.snapshot(); + next(); + const type = state.type; + state.restoreFromSnapshot(snapshot); + return type; +} + +export class TypeAndKeyword { + + + constructor(type, contextualKeyword) { + this.type = type; + this.contextualKeyword = contextualKeyword; + } +} + +export function lookaheadTypeAndKeyword() { + const snapshot = state.snapshot(); + next(); + const type = state.type; + const contextualKeyword = state.contextualKeyword; + state.restoreFromSnapshot(snapshot); + return new TypeAndKeyword(type, contextualKeyword); +} + +export function nextTokenStart() { + return nextTokenStartSince(state.pos); +} + +export function nextTokenStartSince(pos) { + skipWhiteSpace.lastIndex = pos; + const skip = skipWhiteSpace.exec(input); + return pos + skip[0].length; +} + +export function lookaheadCharCode() { + return input.charCodeAt(nextTokenStart()); +} + +// Read a single token, updating the parser object's token-related +// properties. +export function nextToken() { + skipSpace(); + state.start = state.pos; + if (state.pos >= input.length) { + const tokens = state.tokens; + // We normally run past the end a bit, but if we're way past the end, avoid an infinite loop. + // Also check the token positions rather than the types since sometimes we rewrite the token + // type to something else. + if ( + tokens.length >= 2 && + tokens[tokens.length - 1].start >= input.length && + tokens[tokens.length - 2].start >= input.length + ) { + unexpected("Unexpectedly reached the end of input."); + } + finishToken(tt.eof); + return; + } + readToken(input.charCodeAt(state.pos)); +} + +function readToken(code) { + // Identifier or keyword. '\uXXXX' sequences are allowed in + // identifiers, so '\' also dispatches to that. + if ( + IS_IDENTIFIER_START[code] || + code === charCodes.backslash || + (code === charCodes.atSign && input.charCodeAt(state.pos + 1) === charCodes.atSign) + ) { + readWord(); + } else { + getTokenFromCode(code); + } +} + +function skipBlockComment() { + while ( + input.charCodeAt(state.pos) !== charCodes.asterisk || + input.charCodeAt(state.pos + 1) !== charCodes.slash + ) { + state.pos++; + if (state.pos > input.length) { + unexpected("Unterminated comment", state.pos - 2); + return; + } + } + state.pos += 2; +} + +export function skipLineComment(startSkip) { + let ch = input.charCodeAt((state.pos += startSkip)); + if (state.pos < input.length) { + while ( + ch !== charCodes.lineFeed && + ch !== charCodes.carriageReturn && + ch !== charCodes.lineSeparator && + ch !== charCodes.paragraphSeparator && + ++state.pos < input.length + ) { + ch = input.charCodeAt(state.pos); + } + } +} + +// Called at the start of the parse and after every token. Skips +// whitespace and comments. +export function skipSpace() { + while (state.pos < input.length) { + const ch = input.charCodeAt(state.pos); + switch (ch) { + case charCodes.carriageReturn: + if (input.charCodeAt(state.pos + 1) === charCodes.lineFeed) { + ++state.pos; + } + + case charCodes.lineFeed: + case charCodes.lineSeparator: + case charCodes.paragraphSeparator: + ++state.pos; + break; + + case charCodes.slash: + switch (input.charCodeAt(state.pos + 1)) { + case charCodes.asterisk: + state.pos += 2; + skipBlockComment(); + break; + + case charCodes.slash: + skipLineComment(2); + break; + + default: + return; + } + break; + + default: + if (IS_WHITESPACE[ch]) { + ++state.pos; + } else { + return; + } + } + } +} + +// Called at the end of every token. Sets various fields, and skips the space after the token, so +// that the next one's `start` will point at the right position. +export function finishToken( + type, + contextualKeyword = ContextualKeyword.NONE, +) { + state.end = state.pos; + state.type = type; + state.contextualKeyword = contextualKeyword; +} + +// ### Token reading + +// This is the function that is called to fetch the next token. It +// is somewhat obscure, because it works in character codes rather +// than characters, and because operator parsing has been inlined +// into it. +// +// All in the name of speed. +function readToken_dot() { + const nextChar = input.charCodeAt(state.pos + 1); + if (nextChar >= charCodes.digit0 && nextChar <= charCodes.digit9) { + readNumber(true); + return; + } + + if (nextChar === charCodes.dot && input.charCodeAt(state.pos + 2) === charCodes.dot) { + state.pos += 3; + finishToken(tt.ellipsis); + } else { + ++state.pos; + finishToken(tt.dot); + } +} + +function readToken_slash() { + const nextChar = input.charCodeAt(state.pos + 1); + if (nextChar === charCodes.equalsTo) { + finishOp(tt.assign, 2); + } else { + finishOp(tt.slash, 1); + } +} + +function readToken_mult_modulo(code) { + // '%*' + let tokenType = code === charCodes.asterisk ? tt.star : tt.modulo; + let width = 1; + let nextChar = input.charCodeAt(state.pos + 1); + + // Exponentiation operator ** + if (code === charCodes.asterisk && nextChar === charCodes.asterisk) { + width++; + nextChar = input.charCodeAt(state.pos + 2); + tokenType = tt.exponent; + } + + // Match *= or %=, disallowing *=> which can be valid in flow. + if ( + nextChar === charCodes.equalsTo && + input.charCodeAt(state.pos + 2) !== charCodes.greaterThan + ) { + width++; + tokenType = tt.assign; + } + + finishOp(tokenType, width); +} + +function readToken_pipe_amp(code) { + // '|&' + const nextChar = input.charCodeAt(state.pos + 1); + + if (nextChar === code) { + if (input.charCodeAt(state.pos + 2) === charCodes.equalsTo) { + // ||= or &&= + finishOp(tt.assign, 3); + } else { + // || or && + finishOp(code === charCodes.verticalBar ? tt.logicalOR : tt.logicalAND, 2); + } + return; + } + + if (code === charCodes.verticalBar) { + // '|>' + if (nextChar === charCodes.greaterThan) { + finishOp(tt.pipeline, 2); + return; + } else if (nextChar === charCodes.rightCurlyBrace && isFlowEnabled) { + // '|}' + finishOp(tt.braceBarR, 2); + return; + } + } + + if (nextChar === charCodes.equalsTo) { + finishOp(tt.assign, 2); + return; + } + + finishOp(code === charCodes.verticalBar ? tt.bitwiseOR : tt.bitwiseAND, 1); +} + +function readToken_caret() { + // '^' + const nextChar = input.charCodeAt(state.pos + 1); + if (nextChar === charCodes.equalsTo) { + finishOp(tt.assign, 2); + } else { + finishOp(tt.bitwiseXOR, 1); + } +} + +function readToken_plus_min(code) { + // '+-' + const nextChar = input.charCodeAt(state.pos + 1); + + if (nextChar === code) { + // Tentatively call this a prefix operator, but it might be changed to postfix later. + finishOp(tt.preIncDec, 2); + return; + } + + if (nextChar === charCodes.equalsTo) { + finishOp(tt.assign, 2); + } else if (code === charCodes.plusSign) { + finishOp(tt.plus, 1); + } else { + finishOp(tt.minus, 1); + } +} + +function readToken_lt() { + const nextChar = input.charCodeAt(state.pos + 1); + + if (nextChar === charCodes.lessThan) { + if (input.charCodeAt(state.pos + 2) === charCodes.equalsTo) { + finishOp(tt.assign, 3); + return; + } + // We see <<, but need to be really careful about whether to treat it as a + // true left-shift or as two < tokens. + if (state.isType) { + // Within a type, << might come up in a snippet like `Array<() => void>`, + // so treat it as two < tokens. Importantly, this should only override << + // rather than other tokens like <= . If we treated <= as < in a type + // context, then the snippet `a as T <= 1` would incorrectly start parsing + // a type argument on T. We don't need to worry about `a as T << 1` + // because TypeScript disallows that syntax. + finishOp(tt.lessThan, 1); + } else { + // Outside a type, this might be a true left-shift operator, or it might + // still be two open-type-arg tokens, such as in `f<() => void>()`. We + // look at the token while considering the `f`, so we don't yet know that + // we're in a type context. In this case, we initially tokenize as a + // left-shift and correct after-the-fact as necessary in + // tsParseTypeArgumentsWithPossibleBitshift . + finishOp(tt.bitShiftL, 2); + } + return; + } + + if (nextChar === charCodes.equalsTo) { + // <= + finishOp(tt.relationalOrEqual, 2); + } else { + finishOp(tt.lessThan, 1); + } +} + +function readToken_gt() { + if (state.isType) { + // Avoid right-shift for things like `Array>` and + // greater-than-or-equal for things like `const a: Array=[];`. + finishOp(tt.greaterThan, 1); + return; + } + + const nextChar = input.charCodeAt(state.pos + 1); + + if (nextChar === charCodes.greaterThan) { + const size = input.charCodeAt(state.pos + 2) === charCodes.greaterThan ? 3 : 2; + if (input.charCodeAt(state.pos + size) === charCodes.equalsTo) { + finishOp(tt.assign, size + 1); + return; + } + finishOp(tt.bitShiftR, size); + return; + } + + if (nextChar === charCodes.equalsTo) { + // >= + finishOp(tt.relationalOrEqual, 2); + } else { + finishOp(tt.greaterThan, 1); + } +} + +/** + * Reinterpret a possible > token when transitioning from a type to a non-type + * context. + * + * This comes up in two situations where >= needs to be treated as one token: + * - After an `as` expression, like in the code `a as T >= 1`. + * - In a type argument in an expression context, e.g. `f(a < b, c >= d)`, we + * need to see the token as >= so that we get an error and backtrack to + * normal expression parsing. + * + * Other situations require >= to be seen as two tokens, e.g. + * `const x: Array=[];`, so it's important to treat > as its own token in + * typical type parsing situations. + */ +export function rescan_gt() { + if (state.type === tt.greaterThan) { + state.pos -= 1; + readToken_gt(); + } +} + +function readToken_eq_excl(code) { + // '=!' + const nextChar = input.charCodeAt(state.pos + 1); + if (nextChar === charCodes.equalsTo) { + finishOp(tt.equality, input.charCodeAt(state.pos + 2) === charCodes.equalsTo ? 3 : 2); + return; + } + if (code === charCodes.equalsTo && nextChar === charCodes.greaterThan) { + // '=>' + state.pos += 2; + finishToken(tt.arrow); + return; + } + finishOp(code === charCodes.equalsTo ? tt.eq : tt.bang, 1); +} + +function readToken_question() { + // '?' + const nextChar = input.charCodeAt(state.pos + 1); + const nextChar2 = input.charCodeAt(state.pos + 2); + if ( + nextChar === charCodes.questionMark && + // In Flow (but not TypeScript), ??string is a valid type that should be + // tokenized as two individual ? tokens. + !(isFlowEnabled && state.isType) + ) { + if (nextChar2 === charCodes.equalsTo) { + // '??=' + finishOp(tt.assign, 3); + } else { + // '??' + finishOp(tt.nullishCoalescing, 2); + } + } else if ( + nextChar === charCodes.dot && + !(nextChar2 >= charCodes.digit0 && nextChar2 <= charCodes.digit9) + ) { + // '.' not followed by a number + state.pos += 2; + finishToken(tt.questionDot); + } else { + ++state.pos; + finishToken(tt.question); + } +} + +export function getTokenFromCode(code) { + switch (code) { + case charCodes.numberSign: + ++state.pos; + finishToken(tt.hash); + return; + + // The interpretation of a dot depends on whether it is followed + // by a digit or another two dots. + + case charCodes.dot: + readToken_dot(); + return; + + // Punctuation tokens. + case charCodes.leftParenthesis: + ++state.pos; + finishToken(tt.parenL); + return; + case charCodes.rightParenthesis: + ++state.pos; + finishToken(tt.parenR); + return; + case charCodes.semicolon: + ++state.pos; + finishToken(tt.semi); + return; + case charCodes.comma: + ++state.pos; + finishToken(tt.comma); + return; + case charCodes.leftSquareBracket: + ++state.pos; + finishToken(tt.bracketL); + return; + case charCodes.rightSquareBracket: + ++state.pos; + finishToken(tt.bracketR); + return; + + case charCodes.leftCurlyBrace: + if (isFlowEnabled && input.charCodeAt(state.pos + 1) === charCodes.verticalBar) { + finishOp(tt.braceBarL, 2); + } else { + ++state.pos; + finishToken(tt.braceL); + } + return; + + case charCodes.rightCurlyBrace: + ++state.pos; + finishToken(tt.braceR); + return; + + case charCodes.colon: + if (input.charCodeAt(state.pos + 1) === charCodes.colon) { + finishOp(tt.doubleColon, 2); + } else { + ++state.pos; + finishToken(tt.colon); + } + return; + + case charCodes.questionMark: + readToken_question(); + return; + case charCodes.atSign: + ++state.pos; + finishToken(tt.at); + return; + + case charCodes.graveAccent: + ++state.pos; + finishToken(tt.backQuote); + return; + + case charCodes.digit0: { + const nextChar = input.charCodeAt(state.pos + 1); + // '0x', '0X', '0o', '0O', '0b', '0B' + if ( + nextChar === charCodes.lowercaseX || + nextChar === charCodes.uppercaseX || + nextChar === charCodes.lowercaseO || + nextChar === charCodes.uppercaseO || + nextChar === charCodes.lowercaseB || + nextChar === charCodes.uppercaseB + ) { + readRadixNumber(); + return; + } + } + // Anything else beginning with a digit is an integer, octal + // number, or float. + case charCodes.digit1: + case charCodes.digit2: + case charCodes.digit3: + case charCodes.digit4: + case charCodes.digit5: + case charCodes.digit6: + case charCodes.digit7: + case charCodes.digit8: + case charCodes.digit9: + readNumber(false); + return; + + // Quotes produce strings. + case charCodes.quotationMark: + case charCodes.apostrophe: + readString(code); + return; + + // Operators are parsed inline in tiny state machines. '=' (charCodes.equalsTo) is + // often referred to. `finishOp` simply skips the amount of + // characters it is given as second argument, and returns a token + // of the type given by its first argument. + + case charCodes.slash: + readToken_slash(); + return; + + case charCodes.percentSign: + case charCodes.asterisk: + readToken_mult_modulo(code); + return; + + case charCodes.verticalBar: + case charCodes.ampersand: + readToken_pipe_amp(code); + return; + + case charCodes.caret: + readToken_caret(); + return; + + case charCodes.plusSign: + case charCodes.dash: + readToken_plus_min(code); + return; + + case charCodes.lessThan: + readToken_lt(); + return; + + case charCodes.greaterThan: + readToken_gt(); + return; + + case charCodes.equalsTo: + case charCodes.exclamationMark: + readToken_eq_excl(code); + return; + + case charCodes.tilde: + finishOp(tt.tilde, 1); + return; + + default: + break; + } + + unexpected(`Unexpected character '${String.fromCharCode(code)}'`, state.pos); +} + +function finishOp(type, size) { + state.pos += size; + finishToken(type); +} + +function readRegexp() { + const start = state.pos; + let escaped = false; + let inClass = false; + for (;;) { + if (state.pos >= input.length) { + unexpected("Unterminated regular expression", start); + return; + } + const code = input.charCodeAt(state.pos); + if (escaped) { + escaped = false; + } else { + if (code === charCodes.leftSquareBracket) { + inClass = true; + } else if (code === charCodes.rightSquareBracket && inClass) { + inClass = false; + } else if (code === charCodes.slash && !inClass) { + break; + } + escaped = code === charCodes.backslash; + } + ++state.pos; + } + ++state.pos; + // Need to use `skipWord` because '\uXXXX' sequences are allowed here (don't ask). + skipWord(); + + finishToken(tt.regexp); +} + +/** + * Read a decimal integer. Note that this can't be unified with the similar code + * in readRadixNumber (which also handles hex digits) because "e" needs to be + * the end of the integer so that we can properly handle scientific notation. + */ +function readInt() { + while (true) { + const code = input.charCodeAt(state.pos); + if ((code >= charCodes.digit0 && code <= charCodes.digit9) || code === charCodes.underscore) { + state.pos++; + } else { + break; + } + } +} + +function readRadixNumber() { + state.pos += 2; // 0x + + // Walk to the end of the number, allowing hex digits. + while (true) { + const code = input.charCodeAt(state.pos); + if ( + (code >= charCodes.digit0 && code <= charCodes.digit9) || + (code >= charCodes.lowercaseA && code <= charCodes.lowercaseF) || + (code >= charCodes.uppercaseA && code <= charCodes.uppercaseF) || + code === charCodes.underscore + ) { + state.pos++; + } else { + break; + } + } + + const nextChar = input.charCodeAt(state.pos); + if (nextChar === charCodes.lowercaseN) { + ++state.pos; + finishToken(tt.bigint); + } else { + finishToken(tt.num); + } +} + +// Read an integer, octal integer, or floating-point number. +function readNumber(startsWithDot) { + let isBigInt = false; + let isDecimal = false; + + if (!startsWithDot) { + readInt(); + } + + let nextChar = input.charCodeAt(state.pos); + if (nextChar === charCodes.dot) { + ++state.pos; + readInt(); + nextChar = input.charCodeAt(state.pos); + } + + if (nextChar === charCodes.uppercaseE || nextChar === charCodes.lowercaseE) { + nextChar = input.charCodeAt(++state.pos); + if (nextChar === charCodes.plusSign || nextChar === charCodes.dash) { + ++state.pos; + } + readInt(); + nextChar = input.charCodeAt(state.pos); + } + + if (nextChar === charCodes.lowercaseN) { + ++state.pos; + isBigInt = true; + } else if (nextChar === charCodes.lowercaseM) { + ++state.pos; + isDecimal = true; + } + + if (isBigInt) { + finishToken(tt.bigint); + return; + } + + if (isDecimal) { + finishToken(tt.decimal); + return; + } + + finishToken(tt.num); +} + +function readString(quote) { + state.pos++; + for (;;) { + if (state.pos >= input.length) { + unexpected("Unterminated string constant"); + return; + } + const ch = input.charCodeAt(state.pos); + if (ch === charCodes.backslash) { + state.pos++; + } else if (ch === quote) { + break; + } + state.pos++; + } + state.pos++; + finishToken(tt.string); +} + +// Reads template string tokens. +function readTmplToken() { + for (;;) { + if (state.pos >= input.length) { + unexpected("Unterminated template"); + return; + } + const ch = input.charCodeAt(state.pos); + if ( + ch === charCodes.graveAccent || + (ch === charCodes.dollarSign && input.charCodeAt(state.pos + 1) === charCodes.leftCurlyBrace) + ) { + if (state.pos === state.start && match(tt.template)) { + if (ch === charCodes.dollarSign) { + state.pos += 2; + finishToken(tt.dollarBraceL); + return; + } else { + ++state.pos; + finishToken(tt.backQuote); + return; + } + } + finishToken(tt.template); + return; + } + if (ch === charCodes.backslash) { + state.pos++; + } + state.pos++; + } +} + +// Skip to the end of the current word. Note that this is the same as the snippet at the end of +// readWord, but calling skipWord from readWord seems to slightly hurt performance from some rough +// measurements. +export function skipWord() { + while (state.pos < input.length) { + const ch = input.charCodeAt(state.pos); + if (IS_IDENTIFIER_CHAR[ch]) { + state.pos++; + } else if (ch === charCodes.backslash) { + // \u + state.pos += 2; + if (input.charCodeAt(state.pos) === charCodes.leftCurlyBrace) { + while ( + state.pos < input.length && + input.charCodeAt(state.pos) !== charCodes.rightCurlyBrace + ) { + state.pos++; + } + state.pos++; + } + } else { + break; + } + } +} Index: frontend/node_modules/sucrase/dist/esm/parser/tokenizer/keywords.js =================================================================== --- frontend/node_modules/sucrase/dist/esm/parser/tokenizer/keywords.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/esm/parser/tokenizer/keywords.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,43 @@ +export var ContextualKeyword; (function (ContextualKeyword) { + const NONE = 0; ContextualKeyword[ContextualKeyword["NONE"] = NONE] = "NONE"; + const _abstract = NONE + 1; ContextualKeyword[ContextualKeyword["_abstract"] = _abstract] = "_abstract"; + const _accessor = _abstract + 1; ContextualKeyword[ContextualKeyword["_accessor"] = _accessor] = "_accessor"; + const _as = _accessor + 1; ContextualKeyword[ContextualKeyword["_as"] = _as] = "_as"; + const _assert = _as + 1; ContextualKeyword[ContextualKeyword["_assert"] = _assert] = "_assert"; + const _asserts = _assert + 1; ContextualKeyword[ContextualKeyword["_asserts"] = _asserts] = "_asserts"; + const _async = _asserts + 1; ContextualKeyword[ContextualKeyword["_async"] = _async] = "_async"; + const _await = _async + 1; ContextualKeyword[ContextualKeyword["_await"] = _await] = "_await"; + const _checks = _await + 1; ContextualKeyword[ContextualKeyword["_checks"] = _checks] = "_checks"; + const _constructor = _checks + 1; ContextualKeyword[ContextualKeyword["_constructor"] = _constructor] = "_constructor"; + const _declare = _constructor + 1; ContextualKeyword[ContextualKeyword["_declare"] = _declare] = "_declare"; + const _enum = _declare + 1; ContextualKeyword[ContextualKeyword["_enum"] = _enum] = "_enum"; + const _exports = _enum + 1; ContextualKeyword[ContextualKeyword["_exports"] = _exports] = "_exports"; + const _from = _exports + 1; ContextualKeyword[ContextualKeyword["_from"] = _from] = "_from"; + const _get = _from + 1; ContextualKeyword[ContextualKeyword["_get"] = _get] = "_get"; + const _global = _get + 1; ContextualKeyword[ContextualKeyword["_global"] = _global] = "_global"; + const _implements = _global + 1; ContextualKeyword[ContextualKeyword["_implements"] = _implements] = "_implements"; + const _infer = _implements + 1; ContextualKeyword[ContextualKeyword["_infer"] = _infer] = "_infer"; + const _interface = _infer + 1; ContextualKeyword[ContextualKeyword["_interface"] = _interface] = "_interface"; + const _is = _interface + 1; ContextualKeyword[ContextualKeyword["_is"] = _is] = "_is"; + const _keyof = _is + 1; ContextualKeyword[ContextualKeyword["_keyof"] = _keyof] = "_keyof"; + const _mixins = _keyof + 1; ContextualKeyword[ContextualKeyword["_mixins"] = _mixins] = "_mixins"; + const _module = _mixins + 1; ContextualKeyword[ContextualKeyword["_module"] = _module] = "_module"; + const _namespace = _module + 1; ContextualKeyword[ContextualKeyword["_namespace"] = _namespace] = "_namespace"; + const _of = _namespace + 1; ContextualKeyword[ContextualKeyword["_of"] = _of] = "_of"; + const _opaque = _of + 1; ContextualKeyword[ContextualKeyword["_opaque"] = _opaque] = "_opaque"; + const _out = _opaque + 1; ContextualKeyword[ContextualKeyword["_out"] = _out] = "_out"; + const _override = _out + 1; ContextualKeyword[ContextualKeyword["_override"] = _override] = "_override"; + const _private = _override + 1; ContextualKeyword[ContextualKeyword["_private"] = _private] = "_private"; + const _protected = _private + 1; ContextualKeyword[ContextualKeyword["_protected"] = _protected] = "_protected"; + const _proto = _protected + 1; ContextualKeyword[ContextualKeyword["_proto"] = _proto] = "_proto"; + const _public = _proto + 1; ContextualKeyword[ContextualKeyword["_public"] = _public] = "_public"; + const _readonly = _public + 1; ContextualKeyword[ContextualKeyword["_readonly"] = _readonly] = "_readonly"; + const _require = _readonly + 1; ContextualKeyword[ContextualKeyword["_require"] = _require] = "_require"; + const _satisfies = _require + 1; ContextualKeyword[ContextualKeyword["_satisfies"] = _satisfies] = "_satisfies"; + const _set = _satisfies + 1; ContextualKeyword[ContextualKeyword["_set"] = _set] = "_set"; + const _static = _set + 1; ContextualKeyword[ContextualKeyword["_static"] = _static] = "_static"; + const _symbol = _static + 1; ContextualKeyword[ContextualKeyword["_symbol"] = _symbol] = "_symbol"; + const _type = _symbol + 1; ContextualKeyword[ContextualKeyword["_type"] = _type] = "_type"; + const _unique = _type + 1; ContextualKeyword[ContextualKeyword["_unique"] = _unique] = "_unique"; + const _using = _unique + 1; ContextualKeyword[ContextualKeyword["_using"] = _using] = "_using"; +})(ContextualKeyword || (ContextualKeyword = {})); Index: frontend/node_modules/sucrase/dist/esm/parser/tokenizer/readWord.js =================================================================== --- frontend/node_modules/sucrase/dist/esm/parser/tokenizer/readWord.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/esm/parser/tokenizer/readWord.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,64 @@ +import {input, state} from "../traverser/base"; +import {charCodes} from "../util/charcodes"; +import {IS_IDENTIFIER_CHAR} from "../util/identifier"; +import {finishToken} from "./index"; +import {READ_WORD_TREE} from "./readWordTree"; +import {TokenType as tt} from "./types"; + +/** + * Read an identifier, producing either a name token or matching on one of the existing keywords. + * For performance, we pre-generate big decision tree that we traverse. Each node represents a + * prefix and has 27 values, where the first value is the token or contextual token, if any (-1 if + * not), and the other 26 values are the transitions to other nodes, or -1 to stop. + */ +export default function readWord() { + let treePos = 0; + let code = 0; + let pos = state.pos; + while (pos < input.length) { + code = input.charCodeAt(pos); + if (code < charCodes.lowercaseA || code > charCodes.lowercaseZ) { + break; + } + const next = READ_WORD_TREE[treePos + (code - charCodes.lowercaseA) + 1]; + if (next === -1) { + break; + } else { + treePos = next; + pos++; + } + } + + const keywordValue = READ_WORD_TREE[treePos]; + if (keywordValue > -1 && !IS_IDENTIFIER_CHAR[code]) { + state.pos = pos; + if (keywordValue & 1) { + finishToken(keywordValue >>> 1); + } else { + finishToken(tt.name, keywordValue >>> 1); + } + return; + } + + while (pos < input.length) { + const ch = input.charCodeAt(pos); + if (IS_IDENTIFIER_CHAR[ch]) { + pos++; + } else if (ch === charCodes.backslash) { + // \u + pos += 2; + if (input.charCodeAt(pos) === charCodes.leftCurlyBrace) { + while (pos < input.length && input.charCodeAt(pos) !== charCodes.rightCurlyBrace) { + pos++; + } + pos++; + } + } else if (ch === charCodes.atSign && input.charCodeAt(pos + 1) === charCodes.atSign) { + pos += 2; + } else { + break; + } + } + state.pos = pos; + finishToken(tt.name); +} Index: frontend/node_modules/sucrase/dist/esm/parser/tokenizer/readWordTree.js =================================================================== --- frontend/node_modules/sucrase/dist/esm/parser/tokenizer/readWordTree.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/esm/parser/tokenizer/readWordTree.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,671 @@ +// Generated file, do not edit! Run "yarn generate" to re-generate this file. +import {ContextualKeyword} from "./keywords"; +import {TokenType as tt} from "./types"; + +// prettier-ignore +export const READ_WORD_TREE = new Int32Array([ + // "" + -1, 27, 783, 918, 1755, 2376, 2862, 3483, -1, 3699, -1, 4617, 4752, 4833, 5130, 5508, 5940, -1, 6480, 6939, 7749, 8181, 8451, 8613, -1, 8829, -1, + // "a" + -1, -1, 54, 243, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 432, -1, -1, -1, 675, -1, -1, -1, + // "ab" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 81, -1, -1, -1, -1, -1, -1, -1, + // "abs" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 108, -1, -1, -1, -1, -1, -1, + // "abst" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 135, -1, -1, -1, -1, -1, -1, -1, -1, + // "abstr" + -1, 162, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "abstra" + -1, -1, -1, 189, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "abstrac" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 216, -1, -1, -1, -1, -1, -1, + // "abstract" + ContextualKeyword._abstract << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "ac" + -1, -1, -1, 270, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "acc" + -1, -1, -1, -1, -1, 297, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "acce" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 324, -1, -1, -1, -1, -1, -1, -1, + // "acces" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 351, -1, -1, -1, -1, -1, -1, -1, + // "access" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 378, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "accesso" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 405, -1, -1, -1, -1, -1, -1, -1, -1, + // "accessor" + ContextualKeyword._accessor << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "as" + ContextualKeyword._as << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 459, -1, -1, -1, -1, -1, 594, -1, + // "ass" + -1, -1, -1, -1, -1, 486, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "asse" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 513, -1, -1, -1, -1, -1, -1, -1, -1, + // "asser" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 540, -1, -1, -1, -1, -1, -1, + // "assert" + ContextualKeyword._assert << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 567, -1, -1, -1, -1, -1, -1, -1, + // "asserts" + ContextualKeyword._asserts << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "asy" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 621, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "asyn" + -1, -1, -1, 648, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "async" + ContextualKeyword._async << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "aw" + -1, 702, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "awa" + -1, -1, -1, -1, -1, -1, -1, -1, -1, 729, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "awai" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 756, -1, -1, -1, -1, -1, -1, + // "await" + ContextualKeyword._await << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "b" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 810, -1, -1, -1, -1, -1, -1, -1, -1, + // "br" + -1, -1, -1, -1, -1, 837, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "bre" + -1, 864, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "brea" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 891, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "break" + (tt._break << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "c" + -1, 945, -1, -1, -1, -1, -1, -1, 1107, -1, -1, -1, 1242, -1, -1, 1350, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "ca" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 972, 1026, -1, -1, -1, -1, -1, -1, + // "cas" + -1, -1, -1, -1, -1, 999, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "case" + (tt._case << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "cat" + -1, -1, -1, 1053, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "catc" + -1, -1, -1, -1, -1, -1, -1, -1, 1080, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "catch" + (tt._catch << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "ch" + -1, -1, -1, -1, -1, 1134, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "che" + -1, -1, -1, 1161, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "chec" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 1188, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "check" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 1215, -1, -1, -1, -1, -1, -1, -1, + // "checks" + ContextualKeyword._checks << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "cl" + -1, 1269, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "cla" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 1296, -1, -1, -1, -1, -1, -1, -1, + // "clas" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 1323, -1, -1, -1, -1, -1, -1, -1, + // "class" + (tt._class << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "co" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 1377, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "con" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 1404, 1620, -1, -1, -1, -1, -1, -1, + // "cons" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 1431, -1, -1, -1, -1, -1, -1, + // "const" + (tt._const << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 1458, -1, -1, -1, -1, -1, -1, -1, -1, + // "constr" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 1485, -1, -1, -1, -1, -1, + // "constru" + -1, -1, -1, 1512, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "construc" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 1539, -1, -1, -1, -1, -1, -1, + // "construct" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 1566, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "constructo" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 1593, -1, -1, -1, -1, -1, -1, -1, -1, + // "constructor" + ContextualKeyword._constructor << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "cont" + -1, -1, -1, -1, -1, -1, -1, -1, -1, 1647, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "conti" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 1674, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "contin" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 1701, -1, -1, -1, -1, -1, + // "continu" + -1, -1, -1, -1, -1, 1728, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "continue" + (tt._continue << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "d" + -1, -1, -1, -1, -1, 1782, -1, -1, -1, -1, -1, -1, -1, -1, -1, 2349, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "de" + -1, -1, 1809, 1971, -1, -1, 2106, -1, -1, -1, -1, -1, 2241, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "deb" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 1836, -1, -1, -1, -1, -1, + // "debu" + -1, -1, -1, -1, -1, -1, -1, 1863, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "debug" + -1, -1, -1, -1, -1, -1, -1, 1890, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "debugg" + -1, -1, -1, -1, -1, 1917, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "debugge" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 1944, -1, -1, -1, -1, -1, -1, -1, -1, + // "debugger" + (tt._debugger << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "dec" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 1998, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "decl" + -1, 2025, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "decla" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 2052, -1, -1, -1, -1, -1, -1, -1, -1, + // "declar" + -1, -1, -1, -1, -1, 2079, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "declare" + ContextualKeyword._declare << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "def" + -1, 2133, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "defa" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 2160, -1, -1, -1, -1, -1, + // "defau" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 2187, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "defaul" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 2214, -1, -1, -1, -1, -1, -1, + // "default" + (tt._default << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "del" + -1, -1, -1, -1, -1, 2268, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "dele" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 2295, -1, -1, -1, -1, -1, -1, + // "delet" + -1, -1, -1, -1, -1, 2322, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "delete" + (tt._delete << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "do" + (tt._do << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "e" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 2403, -1, 2484, -1, -1, -1, -1, -1, -1, -1, -1, -1, 2565, -1, -1, + // "el" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 2430, -1, -1, -1, -1, -1, -1, -1, + // "els" + -1, -1, -1, -1, -1, 2457, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "else" + (tt._else << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "en" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 2511, -1, -1, -1, -1, -1, + // "enu" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 2538, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "enum" + ContextualKeyword._enum << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "ex" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 2592, -1, -1, -1, 2727, -1, -1, -1, -1, -1, -1, + // "exp" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 2619, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "expo" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 2646, -1, -1, -1, -1, -1, -1, -1, -1, + // "expor" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 2673, -1, -1, -1, -1, -1, -1, + // "export" + (tt._export << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 2700, -1, -1, -1, -1, -1, -1, -1, + // "exports" + ContextualKeyword._exports << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "ext" + -1, -1, -1, -1, -1, 2754, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "exte" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 2781, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "exten" + -1, -1, -1, -1, 2808, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "extend" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 2835, -1, -1, -1, -1, -1, -1, -1, + // "extends" + (tt._extends << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "f" + -1, 2889, -1, -1, -1, -1, -1, -1, -1, 2997, -1, -1, -1, -1, -1, 3159, -1, -1, 3213, -1, -1, 3294, -1, -1, -1, -1, -1, + // "fa" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 2916, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "fal" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 2943, -1, -1, -1, -1, -1, -1, -1, + // "fals" + -1, -1, -1, -1, -1, 2970, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "false" + (tt._false << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "fi" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 3024, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "fin" + -1, 3051, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "fina" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 3078, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "final" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 3105, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "finall" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 3132, -1, + // "finally" + (tt._finally << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "fo" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 3186, -1, -1, -1, -1, -1, -1, -1, -1, + // "for" + (tt._for << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "fr" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 3240, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "fro" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 3267, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "from" + ContextualKeyword._from << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "fu" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 3321, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "fun" + -1, -1, -1, 3348, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "func" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 3375, -1, -1, -1, -1, -1, -1, + // "funct" + -1, -1, -1, -1, -1, -1, -1, -1, -1, 3402, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "functi" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 3429, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "functio" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 3456, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "function" + (tt._function << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "g" + -1, -1, -1, -1, -1, 3510, -1, -1, -1, -1, -1, -1, 3564, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "ge" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 3537, -1, -1, -1, -1, -1, -1, + // "get" + ContextualKeyword._get << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "gl" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 3591, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "glo" + -1, -1, 3618, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "glob" + -1, 3645, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "globa" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 3672, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "global" + ContextualKeyword._global << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "i" + -1, -1, -1, -1, -1, -1, 3726, -1, -1, -1, -1, -1, -1, 3753, 4077, -1, -1, -1, -1, 4590, -1, -1, -1, -1, -1, -1, -1, + // "if" + (tt._if << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "im" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 3780, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "imp" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 3807, -1, -1, 3996, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "impl" + -1, -1, -1, -1, -1, 3834, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "imple" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 3861, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "implem" + -1, -1, -1, -1, -1, 3888, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "impleme" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 3915, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "implemen" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 3942, -1, -1, -1, -1, -1, -1, + // "implement" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 3969, -1, -1, -1, -1, -1, -1, -1, + // "implements" + ContextualKeyword._implements << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "impo" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4023, -1, -1, -1, -1, -1, -1, -1, -1, + // "impor" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4050, -1, -1, -1, -1, -1, -1, + // "import" + (tt._import << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "in" + (tt._in << 1) + 1, -1, -1, -1, -1, -1, 4104, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4185, 4401, -1, -1, -1, -1, -1, -1, + // "inf" + -1, -1, -1, -1, -1, 4131, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "infe" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4158, -1, -1, -1, -1, -1, -1, -1, -1, + // "infer" + ContextualKeyword._infer << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "ins" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4212, -1, -1, -1, -1, -1, -1, + // "inst" + -1, 4239, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "insta" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4266, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "instan" + -1, -1, -1, 4293, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "instanc" + -1, -1, -1, -1, -1, 4320, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "instance" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4347, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "instanceo" + -1, -1, -1, -1, -1, -1, 4374, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "instanceof" + (tt._instanceof << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "int" + -1, -1, -1, -1, -1, 4428, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "inte" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4455, -1, -1, -1, -1, -1, -1, -1, -1, + // "inter" + -1, -1, -1, -1, -1, -1, 4482, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "interf" + -1, 4509, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "interfa" + -1, -1, -1, 4536, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "interfac" + -1, -1, -1, -1, -1, 4563, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "interface" + ContextualKeyword._interface << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "is" + ContextualKeyword._is << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "k" + -1, -1, -1, -1, -1, 4644, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "ke" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4671, -1, + // "key" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4698, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "keyo" + -1, -1, -1, -1, -1, -1, 4725, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "keyof" + ContextualKeyword._keyof << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "l" + -1, -1, -1, -1, -1, 4779, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "le" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4806, -1, -1, -1, -1, -1, -1, + // "let" + (tt._let << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "m" + -1, -1, -1, -1, -1, -1, -1, -1, -1, 4860, -1, -1, -1, -1, -1, 4995, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "mi" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4887, -1, -1, + // "mix" + -1, -1, -1, -1, -1, -1, -1, -1, -1, 4914, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "mixi" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4941, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "mixin" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4968, -1, -1, -1, -1, -1, -1, -1, + // "mixins" + ContextualKeyword._mixins << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "mo" + -1, -1, -1, -1, 5022, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "mod" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 5049, -1, -1, -1, -1, -1, + // "modu" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 5076, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "modul" + -1, -1, -1, -1, -1, 5103, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "module" + ContextualKeyword._module << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "n" + -1, 5157, -1, -1, -1, 5373, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 5427, -1, -1, -1, -1, -1, + // "na" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 5184, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "nam" + -1, -1, -1, -1, -1, 5211, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "name" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 5238, -1, -1, -1, -1, -1, -1, -1, + // "names" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 5265, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "namesp" + -1, 5292, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "namespa" + -1, -1, -1, 5319, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "namespac" + -1, -1, -1, -1, -1, 5346, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "namespace" + ContextualKeyword._namespace << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "ne" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 5400, -1, -1, -1, + // "new" + (tt._new << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "nu" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 5454, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "nul" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 5481, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "null" + (tt._null << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "o" + -1, -1, -1, -1, -1, -1, 5535, -1, -1, -1, -1, -1, -1, -1, -1, -1, 5562, -1, -1, -1, -1, 5697, 5751, -1, -1, -1, -1, + // "of" + ContextualKeyword._of << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "op" + -1, 5589, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "opa" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 5616, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "opaq" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 5643, -1, -1, -1, -1, -1, + // "opaqu" + -1, -1, -1, -1, -1, 5670, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "opaque" + ContextualKeyword._opaque << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "ou" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 5724, -1, -1, -1, -1, -1, -1, + // "out" + ContextualKeyword._out << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "ov" + -1, -1, -1, -1, -1, 5778, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "ove" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 5805, -1, -1, -1, -1, -1, -1, -1, -1, + // "over" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 5832, -1, -1, -1, -1, -1, -1, -1, -1, + // "overr" + -1, -1, -1, -1, -1, -1, -1, -1, -1, 5859, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "overri" + -1, -1, -1, -1, 5886, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "overrid" + -1, -1, -1, -1, -1, 5913, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "override" + ContextualKeyword._override << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "p" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 5967, -1, -1, 6345, -1, -1, -1, -1, -1, + // "pr" + -1, -1, -1, -1, -1, -1, -1, -1, -1, 5994, -1, -1, -1, -1, -1, 6129, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "pri" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 6021, -1, -1, -1, -1, + // "priv" + -1, 6048, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "priva" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 6075, -1, -1, -1, -1, -1, -1, + // "privat" + -1, -1, -1, -1, -1, 6102, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "private" + ContextualKeyword._private << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "pro" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 6156, -1, -1, -1, -1, -1, -1, + // "prot" + -1, -1, -1, -1, -1, 6183, -1, -1, -1, -1, -1, -1, -1, -1, -1, 6318, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "prote" + -1, -1, -1, 6210, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "protec" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 6237, -1, -1, -1, -1, -1, -1, + // "protect" + -1, -1, -1, -1, -1, 6264, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "protecte" + -1, -1, -1, -1, 6291, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "protected" + ContextualKeyword._protected << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "proto" + ContextualKeyword._proto << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "pu" + -1, -1, 6372, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "pub" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 6399, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "publ" + -1, -1, -1, -1, -1, -1, -1, -1, -1, 6426, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "publi" + -1, -1, -1, 6453, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "public" + ContextualKeyword._public << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "r" + -1, -1, -1, -1, -1, 6507, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "re" + -1, 6534, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 6696, -1, -1, 6831, -1, -1, -1, -1, -1, -1, + // "rea" + -1, -1, -1, -1, 6561, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "read" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 6588, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "reado" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 6615, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "readon" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 6642, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "readonl" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 6669, -1, + // "readonly" + ContextualKeyword._readonly << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "req" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 6723, -1, -1, -1, -1, -1, + // "requ" + -1, -1, -1, -1, -1, -1, -1, -1, -1, 6750, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "requi" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 6777, -1, -1, -1, -1, -1, -1, -1, -1, + // "requir" + -1, -1, -1, -1, -1, 6804, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "require" + ContextualKeyword._require << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "ret" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 6858, -1, -1, -1, -1, -1, + // "retu" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 6885, -1, -1, -1, -1, -1, -1, -1, -1, + // "retur" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 6912, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "return" + (tt._return << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "s" + -1, 6966, -1, -1, -1, 7182, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 7236, 7371, -1, 7479, -1, 7614, -1, + // "sa" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 6993, -1, -1, -1, -1, -1, -1, + // "sat" + -1, -1, -1, -1, -1, -1, -1, -1, -1, 7020, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "sati" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 7047, -1, -1, -1, -1, -1, -1, -1, + // "satis" + -1, -1, -1, -1, -1, -1, 7074, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "satisf" + -1, -1, -1, -1, -1, -1, -1, -1, -1, 7101, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "satisfi" + -1, -1, -1, -1, -1, 7128, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "satisfie" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 7155, -1, -1, -1, -1, -1, -1, -1, + // "satisfies" + ContextualKeyword._satisfies << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "se" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 7209, -1, -1, -1, -1, -1, -1, + // "set" + ContextualKeyword._set << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "st" + -1, 7263, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "sta" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 7290, -1, -1, -1, -1, -1, -1, + // "stat" + -1, -1, -1, -1, -1, -1, -1, -1, -1, 7317, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "stati" + -1, -1, -1, 7344, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "static" + ContextualKeyword._static << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "su" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 7398, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "sup" + -1, -1, -1, -1, -1, 7425, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "supe" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 7452, -1, -1, -1, -1, -1, -1, -1, -1, + // "super" + (tt._super << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "sw" + -1, -1, -1, -1, -1, -1, -1, -1, -1, 7506, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "swi" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 7533, -1, -1, -1, -1, -1, -1, + // "swit" + -1, -1, -1, 7560, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "switc" + -1, -1, -1, -1, -1, -1, -1, -1, 7587, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "switch" + (tt._switch << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "sy" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 7641, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "sym" + -1, -1, 7668, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "symb" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 7695, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "symbo" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 7722, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "symbol" + ContextualKeyword._symbol << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "t" + -1, -1, -1, -1, -1, -1, -1, -1, 7776, -1, -1, -1, -1, -1, -1, -1, -1, -1, 7938, -1, -1, -1, -1, -1, -1, 8046, -1, + // "th" + -1, -1, -1, -1, -1, -1, -1, -1, -1, 7803, -1, -1, -1, -1, -1, -1, -1, -1, 7857, -1, -1, -1, -1, -1, -1, -1, -1, + // "thi" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 7830, -1, -1, -1, -1, -1, -1, -1, + // "this" + (tt._this << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "thr" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 7884, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "thro" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 7911, -1, -1, -1, + // "throw" + (tt._throw << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "tr" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 7965, -1, -1, -1, 8019, -1, + // "tru" + -1, -1, -1, -1, -1, 7992, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "true" + (tt._true << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "try" + (tt._try << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "ty" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 8073, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "typ" + -1, -1, -1, -1, -1, 8100, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "type" + ContextualKeyword._type << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 8127, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "typeo" + -1, -1, -1, -1, -1, -1, 8154, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "typeof" + (tt._typeof << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "u" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 8208, -1, -1, -1, -1, 8343, -1, -1, -1, -1, -1, -1, -1, + // "un" + -1, -1, -1, -1, -1, -1, -1, -1, -1, 8235, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "uni" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 8262, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "uniq" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 8289, -1, -1, -1, -1, -1, + // "uniqu" + -1, -1, -1, -1, -1, 8316, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "unique" + ContextualKeyword._unique << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "us" + -1, -1, -1, -1, -1, -1, -1, -1, -1, 8370, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "usi" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 8397, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "usin" + -1, -1, -1, -1, -1, -1, -1, 8424, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "using" + ContextualKeyword._using << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "v" + -1, 8478, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 8532, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "va" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 8505, -1, -1, -1, -1, -1, -1, -1, -1, + // "var" + (tt._var << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "vo" + -1, -1, -1, -1, -1, -1, -1, -1, -1, 8559, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "voi" + -1, -1, -1, -1, 8586, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "void" + (tt._void << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "w" + -1, -1, -1, -1, -1, -1, -1, -1, 8640, 8748, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "wh" + -1, -1, -1, -1, -1, -1, -1, -1, -1, 8667, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "whi" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 8694, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "whil" + -1, -1, -1, -1, -1, 8721, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "while" + (tt._while << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "wi" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 8775, -1, -1, -1, -1, -1, -1, + // "wit" + -1, -1, -1, -1, -1, -1, -1, -1, 8802, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "with" + (tt._with << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "y" + -1, -1, -1, -1, -1, -1, -1, -1, -1, 8856, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "yi" + -1, -1, -1, -1, -1, 8883, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "yie" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 8910, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "yiel" + -1, -1, -1, -1, 8937, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "yield" + (tt._yield << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, +]); Index: frontend/node_modules/sucrase/dist/esm/parser/tokenizer/state.js =================================================================== --- frontend/node_modules/sucrase/dist/esm/parser/tokenizer/state.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/esm/parser/tokenizer/state.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,106 @@ + +import {ContextualKeyword} from "./keywords"; +import { TokenType as tt} from "./types"; + +export class Scope { + + + + + constructor(startTokenIndex, endTokenIndex, isFunctionScope) { + this.startTokenIndex = startTokenIndex; + this.endTokenIndex = endTokenIndex; + this.isFunctionScope = isFunctionScope; + } +} + +export class StateSnapshot { + constructor( + potentialArrowAt, + noAnonFunctionType, + inDisallowConditionalTypesContext, + tokensLength, + scopesLength, + pos, + type, + contextualKeyword, + start, + end, + isType, + scopeDepth, + error, + ) {;this.potentialArrowAt = potentialArrowAt;this.noAnonFunctionType = noAnonFunctionType;this.inDisallowConditionalTypesContext = inDisallowConditionalTypesContext;this.tokensLength = tokensLength;this.scopesLength = scopesLength;this.pos = pos;this.type = type;this.contextualKeyword = contextualKeyword;this.start = start;this.end = end;this.isType = isType;this.scopeDepth = scopeDepth;this.error = error;} +} + +export default class State {constructor() { State.prototype.__init.call(this);State.prototype.__init2.call(this);State.prototype.__init3.call(this);State.prototype.__init4.call(this);State.prototype.__init5.call(this);State.prototype.__init6.call(this);State.prototype.__init7.call(this);State.prototype.__init8.call(this);State.prototype.__init9.call(this);State.prototype.__init10.call(this);State.prototype.__init11.call(this);State.prototype.__init12.call(this);State.prototype.__init13.call(this); } + // Used to signify the start of a potential arrow function + __init() {this.potentialArrowAt = -1} + + // Used by Flow to handle an edge case involving function type parsing. + __init2() {this.noAnonFunctionType = false} + + // Used by TypeScript to handle ambiguities when parsing conditional types. + __init3() {this.inDisallowConditionalTypesContext = false} + + // Token store. + __init4() {this.tokens = []} + + // Array of all observed scopes, ordered by their ending position. + __init5() {this.scopes = []} + + // The current position of the tokenizer in the input. + __init6() {this.pos = 0} + + // Information about the current token. + __init7() {this.type = tt.eof} + __init8() {this.contextualKeyword = ContextualKeyword.NONE} + __init9() {this.start = 0} + __init10() {this.end = 0} + + __init11() {this.isType = false} + __init12() {this.scopeDepth = 0} + + /** + * If the parser is in an error state, then the token is always tt.eof and all functions can + * keep executing but should be written so they don't get into an infinite loop in this situation. + * + * This approach, combined with the ability to snapshot and restore state, allows us to implement + * backtracking without exceptions and without needing to explicitly propagate error states + * everywhere. + */ + __init13() {this.error = null} + + snapshot() { + return new StateSnapshot( + this.potentialArrowAt, + this.noAnonFunctionType, + this.inDisallowConditionalTypesContext, + this.tokens.length, + this.scopes.length, + this.pos, + this.type, + this.contextualKeyword, + this.start, + this.end, + this.isType, + this.scopeDepth, + this.error, + ); + } + + restoreFromSnapshot(snapshot) { + this.potentialArrowAt = snapshot.potentialArrowAt; + this.noAnonFunctionType = snapshot.noAnonFunctionType; + this.inDisallowConditionalTypesContext = snapshot.inDisallowConditionalTypesContext; + this.tokens.length = snapshot.tokensLength; + this.scopes.length = snapshot.scopesLength; + this.pos = snapshot.pos; + this.type = snapshot.type; + this.contextualKeyword = snapshot.contextualKeyword; + this.start = snapshot.start; + this.end = snapshot.end; + this.isType = snapshot.isType; + this.scopeDepth = snapshot.scopeDepth; + this.error = snapshot.error; + } +} Index: frontend/node_modules/sucrase/dist/esm/parser/tokenizer/types.js =================================================================== --- frontend/node_modules/sucrase/dist/esm/parser/tokenizer/types.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/esm/parser/tokenizer/types.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,361 @@ +// Generated file, do not edit! Run "yarn generate" to re-generate this file. +/* istanbul ignore file */ +/** + * Enum of all token types, with bit fields to signify meaningful properties. + */ +export var TokenType; (function (TokenType) { + // Precedence 0 means not an operator; otherwise it is a positive number up to 12. + const PRECEDENCE_MASK = 0xf; TokenType[TokenType["PRECEDENCE_MASK"] = PRECEDENCE_MASK] = "PRECEDENCE_MASK"; + const IS_KEYWORD = 1 << 4; TokenType[TokenType["IS_KEYWORD"] = IS_KEYWORD] = "IS_KEYWORD"; + const IS_ASSIGN = 1 << 5; TokenType[TokenType["IS_ASSIGN"] = IS_ASSIGN] = "IS_ASSIGN"; + const IS_RIGHT_ASSOCIATIVE = 1 << 6; TokenType[TokenType["IS_RIGHT_ASSOCIATIVE"] = IS_RIGHT_ASSOCIATIVE] = "IS_RIGHT_ASSOCIATIVE"; + const IS_PREFIX = 1 << 7; TokenType[TokenType["IS_PREFIX"] = IS_PREFIX] = "IS_PREFIX"; + const IS_POSTFIX = 1 << 8; TokenType[TokenType["IS_POSTFIX"] = IS_POSTFIX] = "IS_POSTFIX"; + const IS_EXPRESSION_START = 1 << 9; TokenType[TokenType["IS_EXPRESSION_START"] = IS_EXPRESSION_START] = "IS_EXPRESSION_START"; + + const num = 512; TokenType[TokenType["num"] = num] = "num"; // num startsExpr + const bigint = 1536; TokenType[TokenType["bigint"] = bigint] = "bigint"; // bigint startsExpr + const decimal = 2560; TokenType[TokenType["decimal"] = decimal] = "decimal"; // decimal startsExpr + const regexp = 3584; TokenType[TokenType["regexp"] = regexp] = "regexp"; // regexp startsExpr + const string = 4608; TokenType[TokenType["string"] = string] = "string"; // string startsExpr + const name = 5632; TokenType[TokenType["name"] = name] = "name"; // name startsExpr + const eof = 6144; TokenType[TokenType["eof"] = eof] = "eof"; // eof + const bracketL = 7680; TokenType[TokenType["bracketL"] = bracketL] = "bracketL"; // [ startsExpr + const bracketR = 8192; TokenType[TokenType["bracketR"] = bracketR] = "bracketR"; // ] + const braceL = 9728; TokenType[TokenType["braceL"] = braceL] = "braceL"; // { startsExpr + const braceBarL = 10752; TokenType[TokenType["braceBarL"] = braceBarL] = "braceBarL"; // {| startsExpr + const braceR = 11264; TokenType[TokenType["braceR"] = braceR] = "braceR"; // } + const braceBarR = 12288; TokenType[TokenType["braceBarR"] = braceBarR] = "braceBarR"; // |} + const parenL = 13824; TokenType[TokenType["parenL"] = parenL] = "parenL"; // ( startsExpr + const parenR = 14336; TokenType[TokenType["parenR"] = parenR] = "parenR"; // ) + const comma = 15360; TokenType[TokenType["comma"] = comma] = "comma"; // , + const semi = 16384; TokenType[TokenType["semi"] = semi] = "semi"; // ; + const colon = 17408; TokenType[TokenType["colon"] = colon] = "colon"; // : + const doubleColon = 18432; TokenType[TokenType["doubleColon"] = doubleColon] = "doubleColon"; // :: + const dot = 19456; TokenType[TokenType["dot"] = dot] = "dot"; // . + const question = 20480; TokenType[TokenType["question"] = question] = "question"; // ? + const questionDot = 21504; TokenType[TokenType["questionDot"] = questionDot] = "questionDot"; // ?. + const arrow = 22528; TokenType[TokenType["arrow"] = arrow] = "arrow"; // => + const template = 23552; TokenType[TokenType["template"] = template] = "template"; // template + const ellipsis = 24576; TokenType[TokenType["ellipsis"] = ellipsis] = "ellipsis"; // ... + const backQuote = 25600; TokenType[TokenType["backQuote"] = backQuote] = "backQuote"; // ` + const dollarBraceL = 27136; TokenType[TokenType["dollarBraceL"] = dollarBraceL] = "dollarBraceL"; // ${ startsExpr + const at = 27648; TokenType[TokenType["at"] = at] = "at"; // @ + const hash = 29184; TokenType[TokenType["hash"] = hash] = "hash"; // # startsExpr + const eq = 29728; TokenType[TokenType["eq"] = eq] = "eq"; // = isAssign + const assign = 30752; TokenType[TokenType["assign"] = assign] = "assign"; // _= isAssign + const preIncDec = 32640; TokenType[TokenType["preIncDec"] = preIncDec] = "preIncDec"; // ++/-- prefix postfix startsExpr + const postIncDec = 33664; TokenType[TokenType["postIncDec"] = postIncDec] = "postIncDec"; // ++/-- prefix postfix startsExpr + const bang = 34432; TokenType[TokenType["bang"] = bang] = "bang"; // ! prefix startsExpr + const tilde = 35456; TokenType[TokenType["tilde"] = tilde] = "tilde"; // ~ prefix startsExpr + const pipeline = 35841; TokenType[TokenType["pipeline"] = pipeline] = "pipeline"; // |> prec:1 + const nullishCoalescing = 36866; TokenType[TokenType["nullishCoalescing"] = nullishCoalescing] = "nullishCoalescing"; // ?? prec:2 + const logicalOR = 37890; TokenType[TokenType["logicalOR"] = logicalOR] = "logicalOR"; // || prec:2 + const logicalAND = 38915; TokenType[TokenType["logicalAND"] = logicalAND] = "logicalAND"; // && prec:3 + const bitwiseOR = 39940; TokenType[TokenType["bitwiseOR"] = bitwiseOR] = "bitwiseOR"; // | prec:4 + const bitwiseXOR = 40965; TokenType[TokenType["bitwiseXOR"] = bitwiseXOR] = "bitwiseXOR"; // ^ prec:5 + const bitwiseAND = 41990; TokenType[TokenType["bitwiseAND"] = bitwiseAND] = "bitwiseAND"; // & prec:6 + const equality = 43015; TokenType[TokenType["equality"] = equality] = "equality"; // ==/!= prec:7 + const lessThan = 44040; TokenType[TokenType["lessThan"] = lessThan] = "lessThan"; // < prec:8 + const greaterThan = 45064; TokenType[TokenType["greaterThan"] = greaterThan] = "greaterThan"; // > prec:8 + const relationalOrEqual = 46088; TokenType[TokenType["relationalOrEqual"] = relationalOrEqual] = "relationalOrEqual"; // <=/>= prec:8 + const bitShiftL = 47113; TokenType[TokenType["bitShiftL"] = bitShiftL] = "bitShiftL"; // << prec:9 + const bitShiftR = 48137; TokenType[TokenType["bitShiftR"] = bitShiftR] = "bitShiftR"; // >>/>>> prec:9 + const plus = 49802; TokenType[TokenType["plus"] = plus] = "plus"; // + prec:10 prefix startsExpr + const minus = 50826; TokenType[TokenType["minus"] = minus] = "minus"; // - prec:10 prefix startsExpr + const modulo = 51723; TokenType[TokenType["modulo"] = modulo] = "modulo"; // % prec:11 startsExpr + const star = 52235; TokenType[TokenType["star"] = star] = "star"; // * prec:11 + const slash = 53259; TokenType[TokenType["slash"] = slash] = "slash"; // / prec:11 + const exponent = 54348; TokenType[TokenType["exponent"] = exponent] = "exponent"; // ** prec:12 rightAssociative + const jsxName = 55296; TokenType[TokenType["jsxName"] = jsxName] = "jsxName"; // jsxName + const jsxText = 56320; TokenType[TokenType["jsxText"] = jsxText] = "jsxText"; // jsxText + const jsxEmptyText = 57344; TokenType[TokenType["jsxEmptyText"] = jsxEmptyText] = "jsxEmptyText"; // jsxEmptyText + const jsxTagStart = 58880; TokenType[TokenType["jsxTagStart"] = jsxTagStart] = "jsxTagStart"; // jsxTagStart startsExpr + const jsxTagEnd = 59392; TokenType[TokenType["jsxTagEnd"] = jsxTagEnd] = "jsxTagEnd"; // jsxTagEnd + const typeParameterStart = 60928; TokenType[TokenType["typeParameterStart"] = typeParameterStart] = "typeParameterStart"; // typeParameterStart startsExpr + const nonNullAssertion = 61440; TokenType[TokenType["nonNullAssertion"] = nonNullAssertion] = "nonNullAssertion"; // nonNullAssertion + const _break = 62480; TokenType[TokenType["_break"] = _break] = "_break"; // break keyword + const _case = 63504; TokenType[TokenType["_case"] = _case] = "_case"; // case keyword + const _catch = 64528; TokenType[TokenType["_catch"] = _catch] = "_catch"; // catch keyword + const _continue = 65552; TokenType[TokenType["_continue"] = _continue] = "_continue"; // continue keyword + const _debugger = 66576; TokenType[TokenType["_debugger"] = _debugger] = "_debugger"; // debugger keyword + const _default = 67600; TokenType[TokenType["_default"] = _default] = "_default"; // default keyword + const _do = 68624; TokenType[TokenType["_do"] = _do] = "_do"; // do keyword + const _else = 69648; TokenType[TokenType["_else"] = _else] = "_else"; // else keyword + const _finally = 70672; TokenType[TokenType["_finally"] = _finally] = "_finally"; // finally keyword + const _for = 71696; TokenType[TokenType["_for"] = _for] = "_for"; // for keyword + const _function = 73232; TokenType[TokenType["_function"] = _function] = "_function"; // function keyword startsExpr + const _if = 73744; TokenType[TokenType["_if"] = _if] = "_if"; // if keyword + const _return = 74768; TokenType[TokenType["_return"] = _return] = "_return"; // return keyword + const _switch = 75792; TokenType[TokenType["_switch"] = _switch] = "_switch"; // switch keyword + const _throw = 77456; TokenType[TokenType["_throw"] = _throw] = "_throw"; // throw keyword prefix startsExpr + const _try = 77840; TokenType[TokenType["_try"] = _try] = "_try"; // try keyword + const _var = 78864; TokenType[TokenType["_var"] = _var] = "_var"; // var keyword + const _let = 79888; TokenType[TokenType["_let"] = _let] = "_let"; // let keyword + const _const = 80912; TokenType[TokenType["_const"] = _const] = "_const"; // const keyword + const _while = 81936; TokenType[TokenType["_while"] = _while] = "_while"; // while keyword + const _with = 82960; TokenType[TokenType["_with"] = _with] = "_with"; // with keyword + const _new = 84496; TokenType[TokenType["_new"] = _new] = "_new"; // new keyword startsExpr + const _this = 85520; TokenType[TokenType["_this"] = _this] = "_this"; // this keyword startsExpr + const _super = 86544; TokenType[TokenType["_super"] = _super] = "_super"; // super keyword startsExpr + const _class = 87568; TokenType[TokenType["_class"] = _class] = "_class"; // class keyword startsExpr + const _extends = 88080; TokenType[TokenType["_extends"] = _extends] = "_extends"; // extends keyword + const _export = 89104; TokenType[TokenType["_export"] = _export] = "_export"; // export keyword + const _import = 90640; TokenType[TokenType["_import"] = _import] = "_import"; // import keyword startsExpr + const _yield = 91664; TokenType[TokenType["_yield"] = _yield] = "_yield"; // yield keyword startsExpr + const _null = 92688; TokenType[TokenType["_null"] = _null] = "_null"; // null keyword startsExpr + const _true = 93712; TokenType[TokenType["_true"] = _true] = "_true"; // true keyword startsExpr + const _false = 94736; TokenType[TokenType["_false"] = _false] = "_false"; // false keyword startsExpr + const _in = 95256; TokenType[TokenType["_in"] = _in] = "_in"; // in prec:8 keyword + const _instanceof = 96280; TokenType[TokenType["_instanceof"] = _instanceof] = "_instanceof"; // instanceof prec:8 keyword + const _typeof = 97936; TokenType[TokenType["_typeof"] = _typeof] = "_typeof"; // typeof keyword prefix startsExpr + const _void = 98960; TokenType[TokenType["_void"] = _void] = "_void"; // void keyword prefix startsExpr + const _delete = 99984; TokenType[TokenType["_delete"] = _delete] = "_delete"; // delete keyword prefix startsExpr + const _async = 100880; TokenType[TokenType["_async"] = _async] = "_async"; // async keyword startsExpr + const _get = 101904; TokenType[TokenType["_get"] = _get] = "_get"; // get keyword startsExpr + const _set = 102928; TokenType[TokenType["_set"] = _set] = "_set"; // set keyword startsExpr + const _declare = 103952; TokenType[TokenType["_declare"] = _declare] = "_declare"; // declare keyword startsExpr + const _readonly = 104976; TokenType[TokenType["_readonly"] = _readonly] = "_readonly"; // readonly keyword startsExpr + const _abstract = 106000; TokenType[TokenType["_abstract"] = _abstract] = "_abstract"; // abstract keyword startsExpr + const _static = 107024; TokenType[TokenType["_static"] = _static] = "_static"; // static keyword startsExpr + const _public = 107536; TokenType[TokenType["_public"] = _public] = "_public"; // public keyword + const _private = 108560; TokenType[TokenType["_private"] = _private] = "_private"; // private keyword + const _protected = 109584; TokenType[TokenType["_protected"] = _protected] = "_protected"; // protected keyword + const _override = 110608; TokenType[TokenType["_override"] = _override] = "_override"; // override keyword + const _as = 112144; TokenType[TokenType["_as"] = _as] = "_as"; // as keyword startsExpr + const _enum = 113168; TokenType[TokenType["_enum"] = _enum] = "_enum"; // enum keyword startsExpr + const _type = 114192; TokenType[TokenType["_type"] = _type] = "_type"; // type keyword startsExpr + const _implements = 115216; TokenType[TokenType["_implements"] = _implements] = "_implements"; // implements keyword startsExpr +})(TokenType || (TokenType = {})); +export function formatTokenType(tokenType) { + switch (tokenType) { + case TokenType.num: + return "num"; + case TokenType.bigint: + return "bigint"; + case TokenType.decimal: + return "decimal"; + case TokenType.regexp: + return "regexp"; + case TokenType.string: + return "string"; + case TokenType.name: + return "name"; + case TokenType.eof: + return "eof"; + case TokenType.bracketL: + return "["; + case TokenType.bracketR: + return "]"; + case TokenType.braceL: + return "{"; + case TokenType.braceBarL: + return "{|"; + case TokenType.braceR: + return "}"; + case TokenType.braceBarR: + return "|}"; + case TokenType.parenL: + return "("; + case TokenType.parenR: + return ")"; + case TokenType.comma: + return ","; + case TokenType.semi: + return ";"; + case TokenType.colon: + return ":"; + case TokenType.doubleColon: + return "::"; + case TokenType.dot: + return "."; + case TokenType.question: + return "?"; + case TokenType.questionDot: + return "?."; + case TokenType.arrow: + return "=>"; + case TokenType.template: + return "template"; + case TokenType.ellipsis: + return "..."; + case TokenType.backQuote: + return "`"; + case TokenType.dollarBraceL: + return "${"; + case TokenType.at: + return "@"; + case TokenType.hash: + return "#"; + case TokenType.eq: + return "="; + case TokenType.assign: + return "_="; + case TokenType.preIncDec: + return "++/--"; + case TokenType.postIncDec: + return "++/--"; + case TokenType.bang: + return "!"; + case TokenType.tilde: + return "~"; + case TokenType.pipeline: + return "|>"; + case TokenType.nullishCoalescing: + return "??"; + case TokenType.logicalOR: + return "||"; + case TokenType.logicalAND: + return "&&"; + case TokenType.bitwiseOR: + return "|"; + case TokenType.bitwiseXOR: + return "^"; + case TokenType.bitwiseAND: + return "&"; + case TokenType.equality: + return "==/!="; + case TokenType.lessThan: + return "<"; + case TokenType.greaterThan: + return ">"; + case TokenType.relationalOrEqual: + return "<=/>="; + case TokenType.bitShiftL: + return "<<"; + case TokenType.bitShiftR: + return ">>/>>>"; + case TokenType.plus: + return "+"; + case TokenType.minus: + return "-"; + case TokenType.modulo: + return "%"; + case TokenType.star: + return "*"; + case TokenType.slash: + return "/"; + case TokenType.exponent: + return "**"; + case TokenType.jsxName: + return "jsxName"; + case TokenType.jsxText: + return "jsxText"; + case TokenType.jsxEmptyText: + return "jsxEmptyText"; + case TokenType.jsxTagStart: + return "jsxTagStart"; + case TokenType.jsxTagEnd: + return "jsxTagEnd"; + case TokenType.typeParameterStart: + return "typeParameterStart"; + case TokenType.nonNullAssertion: + return "nonNullAssertion"; + case TokenType._break: + return "break"; + case TokenType._case: + return "case"; + case TokenType._catch: + return "catch"; + case TokenType._continue: + return "continue"; + case TokenType._debugger: + return "debugger"; + case TokenType._default: + return "default"; + case TokenType._do: + return "do"; + case TokenType._else: + return "else"; + case TokenType._finally: + return "finally"; + case TokenType._for: + return "for"; + case TokenType._function: + return "function"; + case TokenType._if: + return "if"; + case TokenType._return: + return "return"; + case TokenType._switch: + return "switch"; + case TokenType._throw: + return "throw"; + case TokenType._try: + return "try"; + case TokenType._var: + return "var"; + case TokenType._let: + return "let"; + case TokenType._const: + return "const"; + case TokenType._while: + return "while"; + case TokenType._with: + return "with"; + case TokenType._new: + return "new"; + case TokenType._this: + return "this"; + case TokenType._super: + return "super"; + case TokenType._class: + return "class"; + case TokenType._extends: + return "extends"; + case TokenType._export: + return "export"; + case TokenType._import: + return "import"; + case TokenType._yield: + return "yield"; + case TokenType._null: + return "null"; + case TokenType._true: + return "true"; + case TokenType._false: + return "false"; + case TokenType._in: + return "in"; + case TokenType._instanceof: + return "instanceof"; + case TokenType._typeof: + return "typeof"; + case TokenType._void: + return "void"; + case TokenType._delete: + return "delete"; + case TokenType._async: + return "async"; + case TokenType._get: + return "get"; + case TokenType._set: + return "set"; + case TokenType._declare: + return "declare"; + case TokenType._readonly: + return "readonly"; + case TokenType._abstract: + return "abstract"; + case TokenType._static: + return "static"; + case TokenType._public: + return "public"; + case TokenType._private: + return "private"; + case TokenType._protected: + return "protected"; + case TokenType._override: + return "override"; + case TokenType._as: + return "as"; + case TokenType._enum: + return "enum"; + case TokenType._type: + return "type"; + case TokenType._implements: + return "implements"; + default: + return ""; + } +} Index: frontend/node_modules/sucrase/dist/esm/parser/traverser/base.js =================================================================== --- frontend/node_modules/sucrase/dist/esm/parser/traverser/base.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/esm/parser/traverser/base.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,60 @@ +import State from "../tokenizer/state"; +import {charCodes} from "../util/charcodes"; + +export let isJSXEnabled; +export let isTypeScriptEnabled; +export let isFlowEnabled; +export let state; +export let input; +export let nextContextId; + +export function getNextContextId() { + return nextContextId++; +} + +// eslint-disable-next-line @typescript-eslint/no-explicit-any +export function augmentError(error) { + if ("pos" in error) { + const loc = locationForIndex(error.pos); + error.message += ` (${loc.line}:${loc.column})`; + error.loc = loc; + } + return error; +} + +export class Loc { + + + constructor(line, column) { + this.line = line; + this.column = column; + } +} + +export function locationForIndex(pos) { + let line = 1; + let column = 1; + for (let i = 0; i < pos; i++) { + if (input.charCodeAt(i) === charCodes.lineFeed) { + line++; + column = 1; + } else { + column++; + } + } + return new Loc(line, column); +} + +export function initParser( + inputCode, + isJSXEnabledArg, + isTypeScriptEnabledArg, + isFlowEnabledArg, +) { + input = inputCode; + state = new State(); + nextContextId = 1; + isJSXEnabled = isJSXEnabledArg; + isTypeScriptEnabled = isTypeScriptEnabledArg; + isFlowEnabled = isFlowEnabledArg; +} Index: frontend/node_modules/sucrase/dist/esm/parser/traverser/expression.js =================================================================== --- frontend/node_modules/sucrase/dist/esm/parser/traverser/expression.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/esm/parser/traverser/expression.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,1022 @@ +/* eslint max-len: 0 */ + +// A recursive descent parser operates by defining functions for all +// syntactic elements, and recursively calling those, each function +// advancing the input stream and returning an AST node. Precedence +// of constructs (for example, the fact that `!x[1]` means `!(x[1])` +// instead of `(!x)[1]` is handled by the fact that the parser +// function that parses unary prefix operators is called first, and +// in turn calls the function that parses `[]` subscripts — that +// way, it'll receive the node for `x[1]` already parsed, and wraps +// *that* in the unary operator node. +// +// Acorn uses an [operator precedence parser][opp] to handle binary +// operator precedence, because it is much more compact than using +// the technique outlined above, which uses different, nesting +// functions to specify precedence, for all of the ten binary +// precedence levels that JavaScript defines. +// +// [opp]: http://en.wikipedia.org/wiki/Operator-precedence_parser + +import { + flowParseArrow, + flowParseFunctionBodyAndFinish, + flowParseMaybeAssign, + flowParseSubscript, + flowParseSubscripts, + flowParseVariance, + flowStartParseAsyncArrowFromCallExpression, + flowStartParseNewArguments, + flowStartParseObjPropValue, +} from "../plugins/flow"; +import {jsxParseElement} from "../plugins/jsx/index"; +import {typedParseConditional, typedParseParenItem} from "../plugins/types"; +import { + tsParseArrow, + tsParseFunctionBodyAndFinish, + tsParseMaybeAssign, + tsParseSubscript, + tsParseType, + tsParseTypeAssertion, + tsStartParseAsyncArrowFromCallExpression, + tsStartParseObjPropValue, +} from "../plugins/typescript"; +import { + eat, + IdentifierRole, + lookaheadCharCode, + lookaheadType, + match, + next, + nextTemplateToken, + popTypeContext, + pushTypeContext, + rescan_gt, + retokenizeSlashAsRegex, +} from "../tokenizer/index"; +import {ContextualKeyword} from "../tokenizer/keywords"; +import {Scope} from "../tokenizer/state"; +import {TokenType, TokenType as tt} from "../tokenizer/types"; +import {charCodes} from "../util/charcodes"; +import {IS_IDENTIFIER_START} from "../util/identifier"; +import {getNextContextId, isFlowEnabled, isJSXEnabled, isTypeScriptEnabled, state} from "./base"; +import { + markPriorBindingIdentifier, + parseBindingIdentifier, + parseMaybeDefault, + parseRest, + parseSpread, +} from "./lval"; +import { + parseBlock, + parseBlockBody, + parseClass, + parseDecorators, + parseFunction, + parseFunctionParams, +} from "./statement"; +import { + canInsertSemicolon, + eatContextual, + expect, + expectContextual, + hasFollowingLineBreak, + hasPrecedingLineBreak, + isContextual, + unexpected, +} from "./util"; + +export class StopState { + + constructor(stop) { + this.stop = stop; + } +} + +// ### Expression parsing + +// These nest, from the most general expression type at the top to +// 'atomic', nondivisible expression types at the bottom. Most of +// the functions will simply let the function (s) below them parse, +// and, *if* the syntactic construct they handle is present, wrap +// the AST node that the inner parser gave them in another node. +export function parseExpression(noIn = false) { + parseMaybeAssign(noIn); + if (match(tt.comma)) { + while (eat(tt.comma)) { + parseMaybeAssign(noIn); + } + } +} + +/** + * noIn is used when parsing a for loop so that we don't interpret a following "in" as the binary + * operatior. + * isWithinParens is used to indicate that we're parsing something that might be a comma expression + * or might be an arrow function or might be a Flow type assertion (which requires explicit parens). + * In these cases, we should allow : and ?: after the initial "left" part. + */ +export function parseMaybeAssign(noIn = false, isWithinParens = false) { + if (isTypeScriptEnabled) { + return tsParseMaybeAssign(noIn, isWithinParens); + } else if (isFlowEnabled) { + return flowParseMaybeAssign(noIn, isWithinParens); + } else { + return baseParseMaybeAssign(noIn, isWithinParens); + } +} + +// Parse an assignment expression. This includes applications of +// operators like `+=`. +// Returns true if the expression was an arrow function. +export function baseParseMaybeAssign(noIn, isWithinParens) { + if (match(tt._yield)) { + parseYield(); + return false; + } + + if (match(tt.parenL) || match(tt.name) || match(tt._yield)) { + state.potentialArrowAt = state.start; + } + + const wasArrow = parseMaybeConditional(noIn); + if (isWithinParens) { + parseParenItem(); + } + if (state.type & TokenType.IS_ASSIGN) { + next(); + parseMaybeAssign(noIn); + return false; + } + return wasArrow; +} + +// Parse a ternary conditional (`?:`) operator. +// Returns true if the expression was an arrow function. +function parseMaybeConditional(noIn) { + const wasArrow = parseExprOps(noIn); + if (wasArrow) { + return true; + } + parseConditional(noIn); + return false; +} + +function parseConditional(noIn) { + if (isTypeScriptEnabled || isFlowEnabled) { + typedParseConditional(noIn); + } else { + baseParseConditional(noIn); + } +} + +export function baseParseConditional(noIn) { + if (eat(tt.question)) { + parseMaybeAssign(); + expect(tt.colon); + parseMaybeAssign(noIn); + } +} + +// Start the precedence parser. +// Returns true if this was an arrow function +function parseExprOps(noIn) { + const startTokenIndex = state.tokens.length; + const wasArrow = parseMaybeUnary(); + if (wasArrow) { + return true; + } + parseExprOp(startTokenIndex, -1, noIn); + return false; +} + +// Parse binary operators with the operator precedence parsing +// algorithm. `left` is the left-hand side of the operator. +// `minPrec` provides context that allows the function to stop and +// defer further parser to one of its callers when it encounters an +// operator that has a lower precedence than the set it is parsing. +function parseExprOp(startTokenIndex, minPrec, noIn) { + if ( + isTypeScriptEnabled && + (tt._in & TokenType.PRECEDENCE_MASK) > minPrec && + !hasPrecedingLineBreak() && + (eatContextual(ContextualKeyword._as) || eatContextual(ContextualKeyword._satisfies)) + ) { + const oldIsType = pushTypeContext(1); + tsParseType(); + popTypeContext(oldIsType); + rescan_gt(); + parseExprOp(startTokenIndex, minPrec, noIn); + return; + } + + const prec = state.type & TokenType.PRECEDENCE_MASK; + if (prec > 0 && (!noIn || !match(tt._in))) { + if (prec > minPrec) { + const op = state.type; + next(); + if (op === tt.nullishCoalescing) { + state.tokens[state.tokens.length - 1].nullishStartIndex = startTokenIndex; + } + + const rhsStartTokenIndex = state.tokens.length; + parseMaybeUnary(); + // Extend the right operand of this operator if possible. + parseExprOp(rhsStartTokenIndex, op & TokenType.IS_RIGHT_ASSOCIATIVE ? prec - 1 : prec, noIn); + if (op === tt.nullishCoalescing) { + state.tokens[startTokenIndex].numNullishCoalesceStarts++; + state.tokens[state.tokens.length - 1].numNullishCoalesceEnds++; + } + // Continue with any future operator holding this expression as the left operand. + parseExprOp(startTokenIndex, minPrec, noIn); + } + } +} + +// Parse unary operators, both prefix and postfix. +// Returns true if this was an arrow function. +export function parseMaybeUnary() { + if (isTypeScriptEnabled && !isJSXEnabled && eat(tt.lessThan)) { + tsParseTypeAssertion(); + return false; + } + if ( + isContextual(ContextualKeyword._module) && + lookaheadCharCode() === charCodes.leftCurlyBrace && + !hasFollowingLineBreak() + ) { + parseModuleExpression(); + return false; + } + if (state.type & TokenType.IS_PREFIX) { + next(); + parseMaybeUnary(); + return false; + } + + const wasArrow = parseExprSubscripts(); + if (wasArrow) { + return true; + } + while (state.type & TokenType.IS_POSTFIX && !canInsertSemicolon()) { + // The tokenizer calls everything a preincrement, so make it a postincrement when + // we see it in that context. + if (state.type === tt.preIncDec) { + state.type = tt.postIncDec; + } + next(); + } + return false; +} + +// Parse call, dot, and `[]`-subscript expressions. +// Returns true if this was an arrow function. +export function parseExprSubscripts() { + const startTokenIndex = state.tokens.length; + const wasArrow = parseExprAtom(); + if (wasArrow) { + return true; + } + parseSubscripts(startTokenIndex); + // If there was any optional chain operation, the start token would be marked + // as such, so also mark the end now. + if (state.tokens.length > startTokenIndex && state.tokens[startTokenIndex].isOptionalChainStart) { + state.tokens[state.tokens.length - 1].isOptionalChainEnd = true; + } + return false; +} + +function parseSubscripts(startTokenIndex, noCalls = false) { + if (isFlowEnabled) { + flowParseSubscripts(startTokenIndex, noCalls); + } else { + baseParseSubscripts(startTokenIndex, noCalls); + } +} + +export function baseParseSubscripts(startTokenIndex, noCalls = false) { + const stopState = new StopState(false); + do { + parseSubscript(startTokenIndex, noCalls, stopState); + } while (!stopState.stop && !state.error); +} + +function parseSubscript(startTokenIndex, noCalls, stopState) { + if (isTypeScriptEnabled) { + tsParseSubscript(startTokenIndex, noCalls, stopState); + } else if (isFlowEnabled) { + flowParseSubscript(startTokenIndex, noCalls, stopState); + } else { + baseParseSubscript(startTokenIndex, noCalls, stopState); + } +} + +/** Set 'state.stop = true' to indicate that we should stop parsing subscripts. */ +export function baseParseSubscript( + startTokenIndex, + noCalls, + stopState, +) { + if (!noCalls && eat(tt.doubleColon)) { + parseNoCallExpr(); + stopState.stop = true; + // Propagate startTokenIndex so that `a::b?.()` will keep `a` as the first token. We may want + // to revisit this in the future when fully supporting bind syntax. + parseSubscripts(startTokenIndex, noCalls); + } else if (match(tt.questionDot)) { + state.tokens[startTokenIndex].isOptionalChainStart = true; + if (noCalls && lookaheadType() === tt.parenL) { + stopState.stop = true; + return; + } + next(); + state.tokens[state.tokens.length - 1].subscriptStartIndex = startTokenIndex; + + if (eat(tt.bracketL)) { + parseExpression(); + expect(tt.bracketR); + } else if (eat(tt.parenL)) { + parseCallExpressionArguments(); + } else { + parseMaybePrivateName(); + } + } else if (eat(tt.dot)) { + state.tokens[state.tokens.length - 1].subscriptStartIndex = startTokenIndex; + parseMaybePrivateName(); + } else if (eat(tt.bracketL)) { + state.tokens[state.tokens.length - 1].subscriptStartIndex = startTokenIndex; + parseExpression(); + expect(tt.bracketR); + } else if (!noCalls && match(tt.parenL)) { + if (atPossibleAsync()) { + // We see "async", but it's possible it's a usage of the name "async". Parse as if it's a + // function call, and if we see an arrow later, backtrack and re-parse as a parameter list. + const snapshot = state.snapshot(); + const asyncStartTokenIndex = state.tokens.length; + next(); + state.tokens[state.tokens.length - 1].subscriptStartIndex = startTokenIndex; + + const callContextId = getNextContextId(); + + state.tokens[state.tokens.length - 1].contextId = callContextId; + parseCallExpressionArguments(); + state.tokens[state.tokens.length - 1].contextId = callContextId; + + if (shouldParseAsyncArrow()) { + // We hit an arrow, so backtrack and start again parsing function parameters. + state.restoreFromSnapshot(snapshot); + stopState.stop = true; + state.scopeDepth++; + + parseFunctionParams(); + parseAsyncArrowFromCallExpression(asyncStartTokenIndex); + } + } else { + next(); + state.tokens[state.tokens.length - 1].subscriptStartIndex = startTokenIndex; + const callContextId = getNextContextId(); + state.tokens[state.tokens.length - 1].contextId = callContextId; + parseCallExpressionArguments(); + state.tokens[state.tokens.length - 1].contextId = callContextId; + } + } else if (match(tt.backQuote)) { + // Tagged template expression. + parseTemplate(); + } else { + stopState.stop = true; + } +} + +export function atPossibleAsync() { + // This was made less strict than the original version to avoid passing around nodes, but it + // should be safe to have rare false positives here. + return ( + state.tokens[state.tokens.length - 1].contextualKeyword === ContextualKeyword._async && + !canInsertSemicolon() + ); +} + +export function parseCallExpressionArguments() { + let first = true; + while (!eat(tt.parenR) && !state.error) { + if (first) { + first = false; + } else { + expect(tt.comma); + if (eat(tt.parenR)) { + break; + } + } + + parseExprListItem(false); + } +} + +function shouldParseAsyncArrow() { + return match(tt.colon) || match(tt.arrow); +} + +function parseAsyncArrowFromCallExpression(startTokenIndex) { + if (isTypeScriptEnabled) { + tsStartParseAsyncArrowFromCallExpression(); + } else if (isFlowEnabled) { + flowStartParseAsyncArrowFromCallExpression(); + } + expect(tt.arrow); + parseArrowExpression(startTokenIndex); +} + +// Parse a no-call expression (like argument of `new` or `::` operators). + +function parseNoCallExpr() { + const startTokenIndex = state.tokens.length; + parseExprAtom(); + parseSubscripts(startTokenIndex, true); +} + +// Parse an atomic expression — either a single token that is an +// expression, an expression started by a keyword like `function` or +// `new`, or an expression wrapped in punctuation like `()`, `[]`, +// or `{}`. +// Returns true if the parsed expression was an arrow function. +export function parseExprAtom() { + if (eat(tt.modulo)) { + // V8 intrinsic expression. Just parse the identifier, and the function invocation is parsed + // naturally. + parseIdentifier(); + return false; + } + + if (match(tt.jsxText) || match(tt.jsxEmptyText)) { + parseLiteral(); + return false; + } else if (match(tt.lessThan) && isJSXEnabled) { + state.type = tt.jsxTagStart; + jsxParseElement(); + next(); + return false; + } + + const canBeArrow = state.potentialArrowAt === state.start; + switch (state.type) { + case tt.slash: + case tt.assign: + retokenizeSlashAsRegex(); + // Fall through. + + case tt._super: + case tt._this: + case tt.regexp: + case tt.num: + case tt.bigint: + case tt.decimal: + case tt.string: + case tt._null: + case tt._true: + case tt._false: + next(); + return false; + + case tt._import: + next(); + if (match(tt.dot)) { + // import.meta + state.tokens[state.tokens.length - 1].type = tt.name; + next(); + parseIdentifier(); + } + return false; + + case tt.name: { + const startTokenIndex = state.tokens.length; + const functionStart = state.start; + const contextualKeyword = state.contextualKeyword; + parseIdentifier(); + if (contextualKeyword === ContextualKeyword._await) { + parseAwait(); + return false; + } else if ( + contextualKeyword === ContextualKeyword._async && + match(tt._function) && + !canInsertSemicolon() + ) { + next(); + parseFunction(functionStart, false); + return false; + } else if ( + canBeArrow && + contextualKeyword === ContextualKeyword._async && + !canInsertSemicolon() && + match(tt.name) + ) { + state.scopeDepth++; + parseBindingIdentifier(false); + expect(tt.arrow); + // let foo = async bar => {}; + parseArrowExpression(startTokenIndex); + return true; + } else if (match(tt._do) && !canInsertSemicolon()) { + next(); + parseBlock(); + return false; + } + + if (canBeArrow && !canInsertSemicolon() && match(tt.arrow)) { + state.scopeDepth++; + markPriorBindingIdentifier(false); + expect(tt.arrow); + parseArrowExpression(startTokenIndex); + return true; + } + + state.tokens[state.tokens.length - 1].identifierRole = IdentifierRole.Access; + return false; + } + + case tt._do: { + next(); + parseBlock(); + return false; + } + + case tt.parenL: { + const wasArrow = parseParenAndDistinguishExpression(canBeArrow); + return wasArrow; + } + + case tt.bracketL: + next(); + parseExprList(tt.bracketR, true); + return false; + + case tt.braceL: + parseObj(false, false); + return false; + + case tt._function: + parseFunctionExpression(); + return false; + + case tt.at: + parseDecorators(); + // Fall through. + + case tt._class: + parseClass(false); + return false; + + case tt._new: + parseNew(); + return false; + + case tt.backQuote: + parseTemplate(); + return false; + + case tt.doubleColon: { + next(); + parseNoCallExpr(); + return false; + } + + case tt.hash: { + const code = lookaheadCharCode(); + if (IS_IDENTIFIER_START[code] || code === charCodes.backslash) { + parseMaybePrivateName(); + } else { + next(); + } + // Smart pipeline topic reference. + return false; + } + + default: + unexpected(); + return false; + } +} + +function parseMaybePrivateName() { + eat(tt.hash); + parseIdentifier(); +} + +function parseFunctionExpression() { + const functionStart = state.start; + parseIdentifier(); + if (eat(tt.dot)) { + // function.sent + parseIdentifier(); + } + parseFunction(functionStart, false); +} + +export function parseLiteral() { + next(); +} + +export function parseParenExpression() { + expect(tt.parenL); + parseExpression(); + expect(tt.parenR); +} + +// Returns true if this was an arrow expression. +function parseParenAndDistinguishExpression(canBeArrow) { + // Assume this is a normal parenthesized expression, but if we see an arrow, we'll bail and + // start over as a parameter list. + const snapshot = state.snapshot(); + + const startTokenIndex = state.tokens.length; + expect(tt.parenL); + + let first = true; + + while (!match(tt.parenR) && !state.error) { + if (first) { + first = false; + } else { + expect(tt.comma); + if (match(tt.parenR)) { + break; + } + } + + if (match(tt.ellipsis)) { + parseRest(false /* isBlockScope */); + parseParenItem(); + break; + } else { + parseMaybeAssign(false, true); + } + } + + expect(tt.parenR); + + if (canBeArrow && shouldParseArrow()) { + const wasArrow = parseArrow(); + if (wasArrow) { + // It was an arrow function this whole time, so start over and parse it as params so that we + // get proper token annotations. + state.restoreFromSnapshot(snapshot); + state.scopeDepth++; + // Don't specify a context ID because arrow functions don't need a context ID. + parseFunctionParams(); + parseArrow(); + parseArrowExpression(startTokenIndex); + if (state.error) { + // Nevermind! This must have been something that looks very much like an + // arrow function but where its "parameter list" isn't actually a valid + // parameter list. Force non-arrow parsing. + // See https://github.com/alangpierce/sucrase/issues/666 for an example. + state.restoreFromSnapshot(snapshot); + parseParenAndDistinguishExpression(false); + return false; + } + return true; + } + } + + return false; +} + +function shouldParseArrow() { + return match(tt.colon) || !canInsertSemicolon(); +} + +// Returns whether there was an arrow token. +export function parseArrow() { + if (isTypeScriptEnabled) { + return tsParseArrow(); + } else if (isFlowEnabled) { + return flowParseArrow(); + } else { + return eat(tt.arrow); + } +} + +function parseParenItem() { + if (isTypeScriptEnabled || isFlowEnabled) { + typedParseParenItem(); + } +} + +// New's precedence is slightly tricky. It must allow its argument to +// be a `[]` or dot subscript expression, but not a call — at least, +// not without wrapping it in parentheses. Thus, it uses the noCalls +// argument to parseSubscripts to prevent it from consuming the +// argument list. +function parseNew() { + expect(tt._new); + if (eat(tt.dot)) { + // new.target + parseIdentifier(); + return; + } + parseNewCallee(); + if (isFlowEnabled) { + flowStartParseNewArguments(); + } + if (eat(tt.parenL)) { + parseExprList(tt.parenR); + } +} + +function parseNewCallee() { + parseNoCallExpr(); + eat(tt.questionDot); +} + +export function parseTemplate() { + // Finish `, read quasi + nextTemplateToken(); + // Finish quasi, read ${ + nextTemplateToken(); + while (!match(tt.backQuote) && !state.error) { + expect(tt.dollarBraceL); + parseExpression(); + // Finish }, read quasi + nextTemplateToken(); + // Finish quasi, read either ${ or ` + nextTemplateToken(); + } + next(); +} + +// Parse an object literal or binding pattern. +export function parseObj(isPattern, isBlockScope) { + // Attach a context ID to the object open and close brace and each object key. + const contextId = getNextContextId(); + let first = true; + + next(); + state.tokens[state.tokens.length - 1].contextId = contextId; + + while (!eat(tt.braceR) && !state.error) { + if (first) { + first = false; + } else { + expect(tt.comma); + if (eat(tt.braceR)) { + break; + } + } + + let isGenerator = false; + if (match(tt.ellipsis)) { + const previousIndex = state.tokens.length; + parseSpread(); + if (isPattern) { + // Mark role when the only thing being spread over is an identifier. + if (state.tokens.length === previousIndex + 2) { + markPriorBindingIdentifier(isBlockScope); + } + if (eat(tt.braceR)) { + break; + } + } + continue; + } + + if (!isPattern) { + isGenerator = eat(tt.star); + } + + if (!isPattern && isContextual(ContextualKeyword._async)) { + if (isGenerator) unexpected(); + + parseIdentifier(); + if ( + match(tt.colon) || + match(tt.parenL) || + match(tt.braceR) || + match(tt.eq) || + match(tt.comma) + ) { + // This is a key called "async" rather than an async function. + } else { + if (match(tt.star)) { + next(); + isGenerator = true; + } + parsePropertyName(contextId); + } + } else { + parsePropertyName(contextId); + } + + parseObjPropValue(isPattern, isBlockScope, contextId); + } + + state.tokens[state.tokens.length - 1].contextId = contextId; +} + +function isGetterOrSetterMethod(isPattern) { + // We go off of the next and don't bother checking if the node key is actually "get" or "set". + // This lets us avoid generating a node, and should only make the validation worse. + return ( + !isPattern && + (match(tt.string) || // get "string"() {} + match(tt.num) || // get 1() {} + match(tt.bracketL) || // get ["string"]() {} + match(tt.name) || // get foo() {} + !!(state.type & TokenType.IS_KEYWORD)) // get debugger() {} + ); +} + +// Returns true if this was a method. +function parseObjectMethod(isPattern, objectContextId) { + // We don't need to worry about modifiers because object methods can't have optional bodies, so + // the start will never be used. + const functionStart = state.start; + if (match(tt.parenL)) { + if (isPattern) unexpected(); + parseMethod(functionStart, /* isConstructor */ false); + return true; + } + + if (isGetterOrSetterMethod(isPattern)) { + parsePropertyName(objectContextId); + parseMethod(functionStart, /* isConstructor */ false); + return true; + } + return false; +} + +function parseObjectProperty(isPattern, isBlockScope) { + if (eat(tt.colon)) { + if (isPattern) { + parseMaybeDefault(isBlockScope); + } else { + parseMaybeAssign(false); + } + return; + } + + // Since there's no colon, we assume this is an object shorthand. + + // If we're in a destructuring, we've now discovered that the key was actually an assignee, so + // we need to tag it as a declaration with the appropriate scope. Otherwise, we might need to + // transform it on access, so mark it as a normal object shorthand. + let identifierRole; + if (isPattern) { + if (state.scopeDepth === 0) { + identifierRole = IdentifierRole.ObjectShorthandTopLevelDeclaration; + } else if (isBlockScope) { + identifierRole = IdentifierRole.ObjectShorthandBlockScopedDeclaration; + } else { + identifierRole = IdentifierRole.ObjectShorthandFunctionScopedDeclaration; + } + } else { + identifierRole = IdentifierRole.ObjectShorthand; + } + state.tokens[state.tokens.length - 1].identifierRole = identifierRole; + + // Regardless of whether we know this to be a pattern or if we're in an ambiguous context, allow + // parsing as if there's a default value. + parseMaybeDefault(isBlockScope, true); +} + +function parseObjPropValue( + isPattern, + isBlockScope, + objectContextId, +) { + if (isTypeScriptEnabled) { + tsStartParseObjPropValue(); + } else if (isFlowEnabled) { + flowStartParseObjPropValue(); + } + const wasMethod = parseObjectMethod(isPattern, objectContextId); + if (!wasMethod) { + parseObjectProperty(isPattern, isBlockScope); + } +} + +export function parsePropertyName(objectContextId) { + if (isFlowEnabled) { + flowParseVariance(); + } + if (eat(tt.bracketL)) { + state.tokens[state.tokens.length - 1].contextId = objectContextId; + parseMaybeAssign(); + expect(tt.bracketR); + state.tokens[state.tokens.length - 1].contextId = objectContextId; + } else { + if (match(tt.num) || match(tt.string) || match(tt.bigint) || match(tt.decimal)) { + parseExprAtom(); + } else { + parseMaybePrivateName(); + } + + state.tokens[state.tokens.length - 1].identifierRole = IdentifierRole.ObjectKey; + state.tokens[state.tokens.length - 1].contextId = objectContextId; + } +} + +// Parse object or class method. +export function parseMethod(functionStart, isConstructor) { + const funcContextId = getNextContextId(); + + state.scopeDepth++; + const startTokenIndex = state.tokens.length; + const allowModifiers = isConstructor; // For TypeScript parameter properties + parseFunctionParams(allowModifiers, funcContextId); + parseFunctionBodyAndFinish(functionStart, funcContextId); + const endTokenIndex = state.tokens.length; + state.scopes.push(new Scope(startTokenIndex, endTokenIndex, true)); + state.scopeDepth--; +} + +// Parse arrow function expression. +// If the parameters are provided, they will be converted to an +// assignable list. +export function parseArrowExpression(startTokenIndex) { + parseFunctionBody(true); + const endTokenIndex = state.tokens.length; + state.scopes.push(new Scope(startTokenIndex, endTokenIndex, true)); + state.scopeDepth--; +} + +export function parseFunctionBodyAndFinish(functionStart, funcContextId = 0) { + if (isTypeScriptEnabled) { + tsParseFunctionBodyAndFinish(functionStart, funcContextId); + } else if (isFlowEnabled) { + flowParseFunctionBodyAndFinish(funcContextId); + } else { + parseFunctionBody(false, funcContextId); + } +} + +export function parseFunctionBody(allowExpression, funcContextId = 0) { + const isExpression = allowExpression && !match(tt.braceL); + + if (isExpression) { + parseMaybeAssign(); + } else { + parseBlock(true /* isFunctionScope */, funcContextId); + } +} + +// Parses a comma-separated list of expressions, and returns them as +// an array. `close` is the token type that ends the list, and +// `allowEmpty` can be turned on to allow subsequent commas with +// nothing in between them to be parsed as `null` (which is needed +// for array literals). + +function parseExprList(close, allowEmpty = false) { + let first = true; + while (!eat(close) && !state.error) { + if (first) { + first = false; + } else { + expect(tt.comma); + if (eat(close)) break; + } + parseExprListItem(allowEmpty); + } +} + +function parseExprListItem(allowEmpty) { + if (allowEmpty && match(tt.comma)) { + // Empty item; nothing more to parse for this item. + } else if (match(tt.ellipsis)) { + parseSpread(); + parseParenItem(); + } else if (match(tt.question)) { + // Partial function application proposal. + next(); + } else { + parseMaybeAssign(false, true); + } +} + +// Parse the next token as an identifier. +export function parseIdentifier() { + next(); + state.tokens[state.tokens.length - 1].type = tt.name; +} + +// Parses await expression inside async function. +function parseAwait() { + parseMaybeUnary(); +} + +// Parses yield expression inside generator. +function parseYield() { + next(); + if (!match(tt.semi) && !canInsertSemicolon()) { + eat(tt.star); + parseMaybeAssign(); + } +} + +// https://github.com/tc39/proposal-js-module-blocks +function parseModuleExpression() { + expectContextual(ContextualKeyword._module); + expect(tt.braceL); + // For now, just call parseBlockBody to parse the block. In the future when we + // implement full support, we'll want to emit scopes and possibly other + // information. + parseBlockBody(tt.braceR); +} Index: frontend/node_modules/sucrase/dist/esm/parser/traverser/index.js =================================================================== --- frontend/node_modules/sucrase/dist/esm/parser/traverser/index.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/esm/parser/traverser/index.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,18 @@ + +import {nextToken, skipLineComment} from "../tokenizer/index"; +import {charCodes} from "../util/charcodes"; +import {input, state} from "./base"; +import {parseTopLevel} from "./statement"; + +export function parseFile() { + // If enabled, skip leading hashbang line. + if ( + state.pos === 0 && + input.charCodeAt(0) === charCodes.numberSign && + input.charCodeAt(1) === charCodes.exclamationMark + ) { + skipLineComment(2); + } + nextToken(); + return parseTopLevel(); +} Index: frontend/node_modules/sucrase/dist/esm/parser/traverser/lval.js =================================================================== --- frontend/node_modules/sucrase/dist/esm/parser/traverser/lval.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/esm/parser/traverser/lval.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,159 @@ +import {flowParseAssignableListItemTypes} from "../plugins/flow"; +import {tsParseAssignableListItemTypes, tsParseModifiers} from "../plugins/typescript"; +import { + eat, + IdentifierRole, + match, + next, + popTypeContext, + pushTypeContext, +} from "../tokenizer/index"; +import {ContextualKeyword} from "../tokenizer/keywords"; +import {TokenType, TokenType as tt} from "../tokenizer/types"; +import {isFlowEnabled, isTypeScriptEnabled, state} from "./base"; +import {parseIdentifier, parseMaybeAssign, parseObj} from "./expression"; +import {expect, unexpected} from "./util"; + +export function parseSpread() { + next(); + parseMaybeAssign(false); +} + +export function parseRest(isBlockScope) { + next(); + parseBindingAtom(isBlockScope); +} + +export function parseBindingIdentifier(isBlockScope) { + parseIdentifier(); + markPriorBindingIdentifier(isBlockScope); +} + +export function parseImportedIdentifier() { + parseIdentifier(); + state.tokens[state.tokens.length - 1].identifierRole = IdentifierRole.ImportDeclaration; +} + +export function markPriorBindingIdentifier(isBlockScope) { + let identifierRole; + if (state.scopeDepth === 0) { + identifierRole = IdentifierRole.TopLevelDeclaration; + } else if (isBlockScope) { + identifierRole = IdentifierRole.BlockScopedDeclaration; + } else { + identifierRole = IdentifierRole.FunctionScopedDeclaration; + } + state.tokens[state.tokens.length - 1].identifierRole = identifierRole; +} + +// Parses lvalue (assignable) atom. +export function parseBindingAtom(isBlockScope) { + switch (state.type) { + case tt._this: { + // In TypeScript, "this" may be the name of a parameter, so allow it. + const oldIsType = pushTypeContext(0); + next(); + popTypeContext(oldIsType); + return; + } + + case tt._yield: + case tt.name: { + state.type = tt.name; + parseBindingIdentifier(isBlockScope); + return; + } + + case tt.bracketL: { + next(); + parseBindingList(tt.bracketR, isBlockScope, true /* allowEmpty */); + return; + } + + case tt.braceL: + parseObj(true, isBlockScope); + return; + + default: + unexpected(); + } +} + +export function parseBindingList( + close, + isBlockScope, + allowEmpty = false, + allowModifiers = false, + contextId = 0, +) { + let first = true; + + let hasRemovedComma = false; + const firstItemTokenIndex = state.tokens.length; + + while (!eat(close) && !state.error) { + if (first) { + first = false; + } else { + expect(tt.comma); + state.tokens[state.tokens.length - 1].contextId = contextId; + // After a "this" type in TypeScript, we need to set the following comma (if any) to also be + // a type token so that it will be removed. + if (!hasRemovedComma && state.tokens[firstItemTokenIndex].isType) { + state.tokens[state.tokens.length - 1].isType = true; + hasRemovedComma = true; + } + } + if (allowEmpty && match(tt.comma)) { + // Empty item; nothing further to parse for this item. + } else if (eat(close)) { + break; + } else if (match(tt.ellipsis)) { + parseRest(isBlockScope); + parseAssignableListItemTypes(); + // Support rest element trailing commas allowed by TypeScript <2.9. + eat(TokenType.comma); + expect(close); + break; + } else { + parseAssignableListItem(allowModifiers, isBlockScope); + } + } +} + +function parseAssignableListItem(allowModifiers, isBlockScope) { + if (allowModifiers) { + tsParseModifiers([ + ContextualKeyword._public, + ContextualKeyword._protected, + ContextualKeyword._private, + ContextualKeyword._readonly, + ContextualKeyword._override, + ]); + } + + parseMaybeDefault(isBlockScope); + parseAssignableListItemTypes(); + parseMaybeDefault(isBlockScope, true /* leftAlreadyParsed */); +} + +function parseAssignableListItemTypes() { + if (isFlowEnabled) { + flowParseAssignableListItemTypes(); + } else if (isTypeScriptEnabled) { + tsParseAssignableListItemTypes(); + } +} + +// Parses assignment pattern around given atom if possible. +export function parseMaybeDefault(isBlockScope, leftAlreadyParsed = false) { + if (!leftAlreadyParsed) { + parseBindingAtom(isBlockScope); + } + if (!eat(tt.eq)) { + return; + } + const eqIndex = state.tokens.length - 1; + parseMaybeAssign(); + state.tokens[eqIndex].rhsEndIndex = state.tokens.length; +} Index: frontend/node_modules/sucrase/dist/esm/parser/traverser/statement.js =================================================================== --- frontend/node_modules/sucrase/dist/esm/parser/traverser/statement.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/esm/parser/traverser/statement.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,1332 @@ +/* eslint max-len: 0 */ + +import {File} from "../index"; +import { + flowAfterParseClassSuper, + flowAfterParseVarHead, + flowParseExportDeclaration, + flowParseExportStar, + flowParseIdentifierStatement, + flowParseImportSpecifier, + flowParseTypeAnnotation, + flowParseTypeParameterDeclaration, + flowShouldDisallowExportDefaultSpecifier, + flowShouldParseExportDeclaration, + flowShouldParseExportStar, + flowStartParseFunctionParams, + flowStartParseImportSpecifiers, + flowTryParseExportDefaultExpression, + flowTryParseStatement, +} from "../plugins/flow"; +import { + tsAfterParseClassSuper, + tsAfterParseVarHead, + tsIsDeclarationStart, + tsParseExportDeclaration, + tsParseExportSpecifier, + tsParseIdentifierStatement, + tsParseImportEqualsDeclaration, + tsParseImportSpecifier, + tsParseMaybeDecoratorArguments, + tsParseModifiers, + tsStartParseFunctionParams, + tsTryParseClassMemberWithIsStatic, + tsTryParseExport, + tsTryParseExportDefaultExpression, + tsTryParseStatementContent, + tsTryParseTypeAnnotation, + tsTryParseTypeParameters, +} from "../plugins/typescript"; +import { + eat, + eatTypeToken, + IdentifierRole, + lookaheadType, + lookaheadTypeAndKeyword, + match, + next, + nextTokenStart, + nextTokenStartSince, + popTypeContext, + pushTypeContext, +} from "../tokenizer"; +import {ContextualKeyword} from "../tokenizer/keywords"; +import {Scope} from "../tokenizer/state"; +import { TokenType as tt} from "../tokenizer/types"; +import {charCodes} from "../util/charcodes"; +import {getNextContextId, input, isFlowEnabled, isTypeScriptEnabled, state} from "./base"; +import { + parseCallExpressionArguments, + parseExprAtom, + parseExpression, + parseExprSubscripts, + parseFunctionBodyAndFinish, + parseIdentifier, + parseMaybeAssign, + parseMethod, + parseObj, + parseParenExpression, + parsePropertyName, +} from "./expression"; +import { + parseBindingAtom, + parseBindingIdentifier, + parseBindingList, + parseImportedIdentifier, +} from "./lval"; +import { + canInsertSemicolon, + eatContextual, + expect, + expectContextual, + hasFollowingLineBreak, + hasPrecedingLineBreak, + isContextual, + isLineTerminator, + isLookaheadContextual, + semicolon, + unexpected, +} from "./util"; + +export function parseTopLevel() { + parseBlockBody(tt.eof); + state.scopes.push(new Scope(0, state.tokens.length, true)); + if (state.scopeDepth !== 0) { + throw new Error(`Invalid scope depth at end of file: ${state.scopeDepth}`); + } + return new File(state.tokens, state.scopes); +} + +// Parse a single statement. +// +// If expecting a statement and finding a slash operator, parse a +// regular expression literal. This is to handle cases like +// `if (foo) /blah/.exec(foo)`, where looking at the previous token +// does not help. + +export function parseStatement(declaration) { + if (isFlowEnabled) { + if (flowTryParseStatement()) { + return; + } + } + if (match(tt.at)) { + parseDecorators(); + } + parseStatementContent(declaration); +} + +function parseStatementContent(declaration) { + if (isTypeScriptEnabled) { + if (tsTryParseStatementContent()) { + return; + } + } + + const starttype = state.type; + + // Most types of statements are recognized by the keyword they + // start with. Many are trivial to parse, some require a bit of + // complexity. + + switch (starttype) { + case tt._break: + case tt._continue: + parseBreakContinueStatement(); + return; + case tt._debugger: + parseDebuggerStatement(); + return; + case tt._do: + parseDoStatement(); + return; + case tt._for: + parseForStatement(); + return; + case tt._function: + if (lookaheadType() === tt.dot) break; + if (!declaration) unexpected(); + parseFunctionStatement(); + return; + + case tt._class: + if (!declaration) unexpected(); + parseClass(true); + return; + + case tt._if: + parseIfStatement(); + return; + case tt._return: + parseReturnStatement(); + return; + case tt._switch: + parseSwitchStatement(); + return; + case tt._throw: + parseThrowStatement(); + return; + case tt._try: + parseTryStatement(); + return; + + case tt._let: + case tt._const: + if (!declaration) unexpected(); // NOTE: falls through to _var + + case tt._var: + parseVarStatement(starttype !== tt._var); + return; + + case tt._while: + parseWhileStatement(); + return; + case tt.braceL: + parseBlock(); + return; + case tt.semi: + parseEmptyStatement(); + return; + case tt._export: + case tt._import: { + const nextType = lookaheadType(); + if (nextType === tt.parenL || nextType === tt.dot) { + break; + } + next(); + if (starttype === tt._import) { + parseImport(); + } else { + parseExport(); + } + return; + } + case tt.name: + if (state.contextualKeyword === ContextualKeyword._async) { + const functionStart = state.start; + // peek ahead and see if next token is a function + const snapshot = state.snapshot(); + next(); + if (match(tt._function) && !canInsertSemicolon()) { + expect(tt._function); + parseFunction(functionStart, true); + return; + } else { + state.restoreFromSnapshot(snapshot); + } + } else if ( + state.contextualKeyword === ContextualKeyword._using && + !hasFollowingLineBreak() && + // Statements like `using[0]` and `using in foo` aren't actual using + // declarations. + lookaheadType() === tt.name + ) { + parseVarStatement(true); + return; + } else if (startsAwaitUsing()) { + expectContextual(ContextualKeyword._await); + parseVarStatement(true); + return; + } + default: + // Do nothing. + break; + } + + // If the statement does not start with a statement keyword or a + // brace, it's an ExpressionStatement or LabeledStatement. We + // simply start parsing an expression, and afterwards, if the + // next token is a colon and the expression was a simple + // Identifier node, we switch to interpreting it as a label. + const initialTokensLength = state.tokens.length; + parseExpression(); + let simpleName = null; + if (state.tokens.length === initialTokensLength + 1) { + const token = state.tokens[state.tokens.length - 1]; + if (token.type === tt.name) { + simpleName = token.contextualKeyword; + } + } + if (simpleName == null) { + semicolon(); + return; + } + if (eat(tt.colon)) { + parseLabeledStatement(); + } else { + // This was an identifier, so we might want to handle flow/typescript-specific cases. + parseIdentifierStatement(simpleName); + } +} + +/** + * Determine if we're positioned at an `await using` declaration. + * + * Note that this can happen either in place of a regular variable declaration + * or in a loop body, and in both places, there are similar-looking cases where + * we need to return false. + * + * Examples returning true: + * await using foo = bar(); + * for (await using a of b) {} + * + * Examples returning false: + * await using + * await using + 1 + * await using instanceof T + * for (await using;;) {} + * + * For now, we early return if we don't see `await`, then do a simple + * backtracking-based lookahead for the `using` and identifier tokens. In the + * future, this could be optimized with a character-based approach. + */ +function startsAwaitUsing() { + if (!isContextual(ContextualKeyword._await)) { + return false; + } + const snapshot = state.snapshot(); + // await + next(); + if (!isContextual(ContextualKeyword._using) || hasPrecedingLineBreak()) { + state.restoreFromSnapshot(snapshot); + return false; + } + // using + next(); + if (!match(tt.name) || hasPrecedingLineBreak()) { + state.restoreFromSnapshot(snapshot); + return false; + } + state.restoreFromSnapshot(snapshot); + return true; +} + +export function parseDecorators() { + while (match(tt.at)) { + parseDecorator(); + } +} + +function parseDecorator() { + next(); + if (eat(tt.parenL)) { + parseExpression(); + expect(tt.parenR); + } else { + parseIdentifier(); + while (eat(tt.dot)) { + parseIdentifier(); + } + parseMaybeDecoratorArguments(); + } +} + +function parseMaybeDecoratorArguments() { + if (isTypeScriptEnabled) { + tsParseMaybeDecoratorArguments(); + } else { + baseParseMaybeDecoratorArguments(); + } +} + +export function baseParseMaybeDecoratorArguments() { + if (eat(tt.parenL)) { + parseCallExpressionArguments(); + } +} + +function parseBreakContinueStatement() { + next(); + if (!isLineTerminator()) { + parseIdentifier(); + semicolon(); + } +} + +function parseDebuggerStatement() { + next(); + semicolon(); +} + +function parseDoStatement() { + next(); + parseStatement(false); + expect(tt._while); + parseParenExpression(); + eat(tt.semi); +} + +function parseForStatement() { + state.scopeDepth++; + const startTokenIndex = state.tokens.length; + parseAmbiguousForStatement(); + const endTokenIndex = state.tokens.length; + state.scopes.push(new Scope(startTokenIndex, endTokenIndex, false)); + state.scopeDepth--; +} + +/** + * Determine if this token is a `using` declaration (explicit resource + * management) as part of a loop. + * https://github.com/tc39/proposal-explicit-resource-management + */ +function isUsingInLoop() { + if (!isContextual(ContextualKeyword._using)) { + return false; + } + // This must be `for (using of`, where `using` is the name of the loop + // variable. + if (isLookaheadContextual(ContextualKeyword._of)) { + return false; + } + return true; +} + +// Disambiguating between a `for` and a `for`/`in` or `for`/`of` +// loop is non-trivial. Basically, we have to parse the init `var` +// statement or expression, disallowing the `in` operator (see +// the second parameter to `parseExpression`), and then check +// whether the next token is `in` or `of`. When there is no init +// part (semicolon immediately after the opening parenthesis), it +// is a regular `for` loop. +function parseAmbiguousForStatement() { + next(); + + let forAwait = false; + if (isContextual(ContextualKeyword._await)) { + forAwait = true; + next(); + } + expect(tt.parenL); + + if (match(tt.semi)) { + if (forAwait) { + unexpected(); + } + parseFor(); + return; + } + + const isAwaitUsing = startsAwaitUsing(); + if (isAwaitUsing || match(tt._var) || match(tt._let) || match(tt._const) || isUsingInLoop()) { + if (isAwaitUsing) { + expectContextual(ContextualKeyword._await); + } + next(); + parseVar(true, state.type !== tt._var); + if (match(tt._in) || isContextual(ContextualKeyword._of)) { + parseForIn(forAwait); + return; + } + parseFor(); + return; + } + + parseExpression(true); + if (match(tt._in) || isContextual(ContextualKeyword._of)) { + parseForIn(forAwait); + return; + } + if (forAwait) { + unexpected(); + } + parseFor(); +} + +function parseFunctionStatement() { + const functionStart = state.start; + next(); + parseFunction(functionStart, true); +} + +function parseIfStatement() { + next(); + parseParenExpression(); + parseStatement(false); + if (eat(tt._else)) { + parseStatement(false); + } +} + +function parseReturnStatement() { + next(); + + // In `return` (and `break`/`continue`), the keywords with + // optional arguments, we eagerly look for a semicolon or the + // possibility to insert one. + + if (!isLineTerminator()) { + parseExpression(); + semicolon(); + } +} + +function parseSwitchStatement() { + next(); + parseParenExpression(); + state.scopeDepth++; + const startTokenIndex = state.tokens.length; + expect(tt.braceL); + + // Don't bother validation; just go through any sequence of cases, defaults, and statements. + while (!match(tt.braceR) && !state.error) { + if (match(tt._case) || match(tt._default)) { + const isCase = match(tt._case); + next(); + if (isCase) { + parseExpression(); + } + expect(tt.colon); + } else { + parseStatement(true); + } + } + next(); // Closing brace + const endTokenIndex = state.tokens.length; + state.scopes.push(new Scope(startTokenIndex, endTokenIndex, false)); + state.scopeDepth--; +} + +function parseThrowStatement() { + next(); + parseExpression(); + semicolon(); +} + +function parseCatchClauseParam() { + parseBindingAtom(true /* isBlockScope */); + + if (isTypeScriptEnabled) { + tsTryParseTypeAnnotation(); + } +} + +function parseTryStatement() { + next(); + + parseBlock(); + + if (match(tt._catch)) { + next(); + let catchBindingStartTokenIndex = null; + if (match(tt.parenL)) { + state.scopeDepth++; + catchBindingStartTokenIndex = state.tokens.length; + expect(tt.parenL); + parseCatchClauseParam(); + expect(tt.parenR); + } + parseBlock(); + if (catchBindingStartTokenIndex != null) { + // We need a special scope for the catch binding which includes the binding itself and the + // catch block. + const endTokenIndex = state.tokens.length; + state.scopes.push(new Scope(catchBindingStartTokenIndex, endTokenIndex, false)); + state.scopeDepth--; + } + } + if (eat(tt._finally)) { + parseBlock(); + } +} + +export function parseVarStatement(isBlockScope) { + next(); + parseVar(false, isBlockScope); + semicolon(); +} + +function parseWhileStatement() { + next(); + parseParenExpression(); + parseStatement(false); +} + +function parseEmptyStatement() { + next(); +} + +function parseLabeledStatement() { + parseStatement(true); +} + +/** + * Parse a statement starting with an identifier of the given name. Subclasses match on the name + * to handle statements like "declare". + */ +function parseIdentifierStatement(contextualKeyword) { + if (isTypeScriptEnabled) { + tsParseIdentifierStatement(contextualKeyword); + } else if (isFlowEnabled) { + flowParseIdentifierStatement(contextualKeyword); + } else { + semicolon(); + } +} + +// Parse a semicolon-enclosed block of statements. +export function parseBlock(isFunctionScope = false, contextId = 0) { + const startTokenIndex = state.tokens.length; + state.scopeDepth++; + expect(tt.braceL); + if (contextId) { + state.tokens[state.tokens.length - 1].contextId = contextId; + } + parseBlockBody(tt.braceR); + if (contextId) { + state.tokens[state.tokens.length - 1].contextId = contextId; + } + const endTokenIndex = state.tokens.length; + state.scopes.push(new Scope(startTokenIndex, endTokenIndex, isFunctionScope)); + state.scopeDepth--; +} + +export function parseBlockBody(end) { + while (!eat(end) && !state.error) { + parseStatement(true); + } +} + +// Parse a regular `for` loop. The disambiguation code in +// `parseStatement` will already have parsed the init statement or +// expression. + +function parseFor() { + expect(tt.semi); + if (!match(tt.semi)) { + parseExpression(); + } + expect(tt.semi); + if (!match(tt.parenR)) { + parseExpression(); + } + expect(tt.parenR); + parseStatement(false); +} + +// Parse a `for`/`in` and `for`/`of` loop, which are almost +// same from parser's perspective. + +function parseForIn(forAwait) { + if (forAwait) { + eatContextual(ContextualKeyword._of); + } else { + next(); + } + parseExpression(); + expect(tt.parenR); + parseStatement(false); +} + +// Parse a list of variable declarations. + +function parseVar(isFor, isBlockScope) { + while (true) { + parseVarHead(isBlockScope); + if (eat(tt.eq)) { + const eqIndex = state.tokens.length - 1; + parseMaybeAssign(isFor); + state.tokens[eqIndex].rhsEndIndex = state.tokens.length; + } + if (!eat(tt.comma)) { + break; + } + } +} + +function parseVarHead(isBlockScope) { + parseBindingAtom(isBlockScope); + if (isTypeScriptEnabled) { + tsAfterParseVarHead(); + } else if (isFlowEnabled) { + flowAfterParseVarHead(); + } +} + +// Parse a function declaration or literal (depending on the +// `isStatement` parameter). + +export function parseFunction( + functionStart, + isStatement, + optionalId = false, +) { + if (match(tt.star)) { + next(); + } + + if (isStatement && !optionalId && !match(tt.name) && !match(tt._yield)) { + unexpected(); + } + + let nameScopeStartTokenIndex = null; + + if (match(tt.name)) { + // Expression-style functions should limit their name's scope to the function body, so we make + // a new function scope to enforce that. + if (!isStatement) { + nameScopeStartTokenIndex = state.tokens.length; + state.scopeDepth++; + } + parseBindingIdentifier(false); + } + + const startTokenIndex = state.tokens.length; + state.scopeDepth++; + parseFunctionParams(); + parseFunctionBodyAndFinish(functionStart); + const endTokenIndex = state.tokens.length; + // In addition to the block scope of the function body, we need a separate function-style scope + // that includes the params. + state.scopes.push(new Scope(startTokenIndex, endTokenIndex, true)); + state.scopeDepth--; + if (nameScopeStartTokenIndex !== null) { + state.scopes.push(new Scope(nameScopeStartTokenIndex, endTokenIndex, true)); + state.scopeDepth--; + } +} + +export function parseFunctionParams( + allowModifiers = false, + funcContextId = 0, +) { + if (isTypeScriptEnabled) { + tsStartParseFunctionParams(); + } else if (isFlowEnabled) { + flowStartParseFunctionParams(); + } + + expect(tt.parenL); + if (funcContextId) { + state.tokens[state.tokens.length - 1].contextId = funcContextId; + } + parseBindingList( + tt.parenR, + false /* isBlockScope */, + false /* allowEmpty */, + allowModifiers, + funcContextId, + ); + if (funcContextId) { + state.tokens[state.tokens.length - 1].contextId = funcContextId; + } +} + +// Parse a class declaration or literal (depending on the +// `isStatement` parameter). + +export function parseClass(isStatement, optionalId = false) { + // Put a context ID on the class keyword, the open-brace, and the close-brace, so that later + // code can easily navigate to meaningful points on the class. + const contextId = getNextContextId(); + + next(); + state.tokens[state.tokens.length - 1].contextId = contextId; + state.tokens[state.tokens.length - 1].isExpression = !isStatement; + // Like with functions, we declare a special "name scope" from the start of the name to the end + // of the class, but only with expression-style classes, to represent the fact that the name is + // available to the body of the class but not an outer declaration. + let nameScopeStartTokenIndex = null; + if (!isStatement) { + nameScopeStartTokenIndex = state.tokens.length; + state.scopeDepth++; + } + parseClassId(isStatement, optionalId); + parseClassSuper(); + const openBraceIndex = state.tokens.length; + parseClassBody(contextId); + if (state.error) { + return; + } + state.tokens[openBraceIndex].contextId = contextId; + state.tokens[state.tokens.length - 1].contextId = contextId; + if (nameScopeStartTokenIndex !== null) { + const endTokenIndex = state.tokens.length; + state.scopes.push(new Scope(nameScopeStartTokenIndex, endTokenIndex, false)); + state.scopeDepth--; + } +} + +function isClassProperty() { + return match(tt.eq) || match(tt.semi) || match(tt.braceR) || match(tt.bang) || match(tt.colon); +} + +function isClassMethod() { + return match(tt.parenL) || match(tt.lessThan); +} + +function parseClassBody(classContextId) { + expect(tt.braceL); + + while (!eat(tt.braceR) && !state.error) { + if (eat(tt.semi)) { + continue; + } + + if (match(tt.at)) { + parseDecorator(); + continue; + } + const memberStart = state.start; + parseClassMember(memberStart, classContextId); + } +} + +function parseClassMember(memberStart, classContextId) { + if (isTypeScriptEnabled) { + tsParseModifiers([ + ContextualKeyword._declare, + ContextualKeyword._public, + ContextualKeyword._protected, + ContextualKeyword._private, + ContextualKeyword._override, + ]); + } + let isStatic = false; + if (match(tt.name) && state.contextualKeyword === ContextualKeyword._static) { + parseIdentifier(); // eats 'static' + if (isClassMethod()) { + parseClassMethod(memberStart, /* isConstructor */ false); + return; + } else if (isClassProperty()) { + parseClassProperty(); + return; + } + // otherwise something static + state.tokens[state.tokens.length - 1].type = tt._static; + isStatic = true; + + if (match(tt.braceL)) { + // This is a static block. Mark the word "static" with the class context ID for class element + // detection and parse as a regular block. + state.tokens[state.tokens.length - 1].contextId = classContextId; + parseBlock(); + return; + } + } + + parseClassMemberWithIsStatic(memberStart, isStatic, classContextId); +} + +function parseClassMemberWithIsStatic( + memberStart, + isStatic, + classContextId, +) { + if (isTypeScriptEnabled) { + if (tsTryParseClassMemberWithIsStatic(isStatic)) { + return; + } + } + if (eat(tt.star)) { + // a generator + parseClassPropertyName(classContextId); + parseClassMethod(memberStart, /* isConstructor */ false); + return; + } + + // Get the identifier name so we can tell if it's actually a keyword like "async", "get", or + // "set". + parseClassPropertyName(classContextId); + let isConstructor = false; + const token = state.tokens[state.tokens.length - 1]; + // We allow "constructor" as either an identifier or a string. + if (token.contextualKeyword === ContextualKeyword._constructor) { + isConstructor = true; + } + parsePostMemberNameModifiers(); + + if (isClassMethod()) { + parseClassMethod(memberStart, isConstructor); + } else if (isClassProperty()) { + parseClassProperty(); + } else if (token.contextualKeyword === ContextualKeyword._async && !isLineTerminator()) { + state.tokens[state.tokens.length - 1].type = tt._async; + // an async method + const isGenerator = match(tt.star); + if (isGenerator) { + next(); + } + + // The so-called parsed name would have been "async": get the real name. + parseClassPropertyName(classContextId); + parsePostMemberNameModifiers(); + parseClassMethod(memberStart, false /* isConstructor */); + } else if ( + (token.contextualKeyword === ContextualKeyword._get || + token.contextualKeyword === ContextualKeyword._set) && + !(isLineTerminator() && match(tt.star)) + ) { + if (token.contextualKeyword === ContextualKeyword._get) { + state.tokens[state.tokens.length - 1].type = tt._get; + } else { + state.tokens[state.tokens.length - 1].type = tt._set; + } + // `get\n*` is an uninitialized property named 'get' followed by a generator. + // a getter or setter + // The so-called parsed name would have been "get/set": get the real name. + parseClassPropertyName(classContextId); + parseClassMethod(memberStart, /* isConstructor */ false); + } else if (token.contextualKeyword === ContextualKeyword._accessor && !isLineTerminator()) { + parseClassPropertyName(classContextId); + parseClassProperty(); + } else if (isLineTerminator()) { + // an uninitialized class property (due to ASI, since we don't otherwise recognize the next token) + parseClassProperty(); + } else { + unexpected(); + } +} + +function parseClassMethod(functionStart, isConstructor) { + if (isTypeScriptEnabled) { + tsTryParseTypeParameters(); + } else if (isFlowEnabled) { + if (match(tt.lessThan)) { + flowParseTypeParameterDeclaration(); + } + } + parseMethod(functionStart, isConstructor); +} + +// Return the name of the class property, if it is a simple identifier. +export function parseClassPropertyName(classContextId) { + parsePropertyName(classContextId); +} + +export function parsePostMemberNameModifiers() { + if (isTypeScriptEnabled) { + const oldIsType = pushTypeContext(0); + eat(tt.question); + popTypeContext(oldIsType); + } +} + +export function parseClassProperty() { + if (isTypeScriptEnabled) { + eatTypeToken(tt.bang); + tsTryParseTypeAnnotation(); + } else if (isFlowEnabled) { + if (match(tt.colon)) { + flowParseTypeAnnotation(); + } + } + + if (match(tt.eq)) { + const equalsTokenIndex = state.tokens.length; + next(); + parseMaybeAssign(); + state.tokens[equalsTokenIndex].rhsEndIndex = state.tokens.length; + } + semicolon(); +} + +function parseClassId(isStatement, optionalId = false) { + if ( + isTypeScriptEnabled && + (!isStatement || optionalId) && + isContextual(ContextualKeyword._implements) + ) { + return; + } + + if (match(tt.name)) { + parseBindingIdentifier(true); + } + + if (isTypeScriptEnabled) { + tsTryParseTypeParameters(); + } else if (isFlowEnabled) { + if (match(tt.lessThan)) { + flowParseTypeParameterDeclaration(); + } + } +} + +// Returns true if there was a superclass. +function parseClassSuper() { + let hasSuper = false; + if (eat(tt._extends)) { + parseExprSubscripts(); + hasSuper = true; + } else { + hasSuper = false; + } + if (isTypeScriptEnabled) { + tsAfterParseClassSuper(hasSuper); + } else if (isFlowEnabled) { + flowAfterParseClassSuper(hasSuper); + } +} + +// Parses module export declaration. + +export function parseExport() { + const exportIndex = state.tokens.length - 1; + if (isTypeScriptEnabled) { + if (tsTryParseExport()) { + return; + } + } + // export * from '...' + if (shouldParseExportStar()) { + parseExportStar(); + } else if (isExportDefaultSpecifier()) { + // export default from + parseIdentifier(); + if (match(tt.comma) && lookaheadType() === tt.star) { + expect(tt.comma); + expect(tt.star); + expectContextual(ContextualKeyword._as); + parseIdentifier(); + } else { + parseExportSpecifiersMaybe(); + } + parseExportFrom(); + } else if (eat(tt._default)) { + // export default ... + parseExportDefaultExpression(); + } else if (shouldParseExportDeclaration()) { + parseExportDeclaration(); + } else { + // export { x, y as z } [from '...'] + parseExportSpecifiers(); + parseExportFrom(); + } + state.tokens[exportIndex].rhsEndIndex = state.tokens.length; +} + +function parseExportDefaultExpression() { + if (isTypeScriptEnabled) { + if (tsTryParseExportDefaultExpression()) { + return; + } + } + if (isFlowEnabled) { + if (flowTryParseExportDefaultExpression()) { + return; + } + } + const functionStart = state.start; + if (eat(tt._function)) { + parseFunction(functionStart, true, true); + } else if (isContextual(ContextualKeyword._async) && lookaheadType() === tt._function) { + // async function declaration + eatContextual(ContextualKeyword._async); + eat(tt._function); + parseFunction(functionStart, true, true); + } else if (match(tt._class)) { + parseClass(true, true); + } else if (match(tt.at)) { + parseDecorators(); + parseClass(true, true); + } else { + parseMaybeAssign(); + semicolon(); + } +} + +function parseExportDeclaration() { + if (isTypeScriptEnabled) { + tsParseExportDeclaration(); + } else if (isFlowEnabled) { + flowParseExportDeclaration(); + } else { + parseStatement(true); + } +} + +function isExportDefaultSpecifier() { + if (isTypeScriptEnabled && tsIsDeclarationStart()) { + return false; + } else if (isFlowEnabled && flowShouldDisallowExportDefaultSpecifier()) { + return false; + } + if (match(tt.name)) { + return state.contextualKeyword !== ContextualKeyword._async; + } + + if (!match(tt._default)) { + return false; + } + + const _next = nextTokenStart(); + const lookahead = lookaheadTypeAndKeyword(); + const hasFrom = + lookahead.type === tt.name && lookahead.contextualKeyword === ContextualKeyword._from; + if (lookahead.type === tt.comma) { + return true; + } + // lookahead again when `export default from` is seen + if (hasFrom) { + const nextAfterFrom = input.charCodeAt(nextTokenStartSince(_next + 4)); + return nextAfterFrom === charCodes.quotationMark || nextAfterFrom === charCodes.apostrophe; + } + return false; +} + +function parseExportSpecifiersMaybe() { + if (eat(tt.comma)) { + parseExportSpecifiers(); + } +} + +export function parseExportFrom() { + if (eatContextual(ContextualKeyword._from)) { + parseExprAtom(); + maybeParseImportAttributes(); + } + semicolon(); +} + +function shouldParseExportStar() { + if (isFlowEnabled) { + return flowShouldParseExportStar(); + } else { + return match(tt.star); + } +} + +function parseExportStar() { + if (isFlowEnabled) { + flowParseExportStar(); + } else { + baseParseExportStar(); + } +} + +export function baseParseExportStar() { + expect(tt.star); + + if (isContextual(ContextualKeyword._as)) { + parseExportNamespace(); + } else { + parseExportFrom(); + } +} + +function parseExportNamespace() { + next(); + state.tokens[state.tokens.length - 1].type = tt._as; + parseIdentifier(); + parseExportSpecifiersMaybe(); + parseExportFrom(); +} + +function shouldParseExportDeclaration() { + return ( + (isTypeScriptEnabled && tsIsDeclarationStart()) || + (isFlowEnabled && flowShouldParseExportDeclaration()) || + state.type === tt._var || + state.type === tt._const || + state.type === tt._let || + state.type === tt._function || + state.type === tt._class || + isContextual(ContextualKeyword._async) || + match(tt.at) + ); +} + +// Parses a comma-separated list of module exports. +export function parseExportSpecifiers() { + let first = true; + + // export { x, y as z } [from '...'] + expect(tt.braceL); + + while (!eat(tt.braceR) && !state.error) { + if (first) { + first = false; + } else { + expect(tt.comma); + if (eat(tt.braceR)) { + break; + } + } + parseExportSpecifier(); + } +} + +function parseExportSpecifier() { + if (isTypeScriptEnabled) { + tsParseExportSpecifier(); + return; + } + parseIdentifier(); + state.tokens[state.tokens.length - 1].identifierRole = IdentifierRole.ExportAccess; + if (eatContextual(ContextualKeyword._as)) { + parseIdentifier(); + } +} + +/** + * Starting at the `module` token in an import, determine if it was truly an + * import reflection token or just looks like one. + * + * Returns true for: + * import module foo from "foo"; + * import module from from "foo"; + * + * Returns false for: + * import module from "foo"; + * import module, {bar} from "foo"; + */ +function isImportReflection() { + const snapshot = state.snapshot(); + expectContextual(ContextualKeyword._module); + if (eatContextual(ContextualKeyword._from)) { + if (isContextual(ContextualKeyword._from)) { + state.restoreFromSnapshot(snapshot); + return true; + } else { + state.restoreFromSnapshot(snapshot); + return false; + } + } else if (match(tt.comma)) { + state.restoreFromSnapshot(snapshot); + return false; + } else { + state.restoreFromSnapshot(snapshot); + return true; + } +} + +/** + * Eat the "module" token from the import reflection proposal. + * https://github.com/tc39/proposal-import-reflection + */ +function parseMaybeImportReflection() { + // isImportReflection does snapshot/restore, so only run it if we see the word + // "module". + if (isContextual(ContextualKeyword._module) && isImportReflection()) { + next(); + } +} + +// Parses import declaration. + +export function parseImport() { + if (isTypeScriptEnabled && match(tt.name) && lookaheadType() === tt.eq) { + tsParseImportEqualsDeclaration(); + return; + } + if (isTypeScriptEnabled && isContextual(ContextualKeyword._type)) { + const lookahead = lookaheadTypeAndKeyword(); + if (lookahead.type === tt.name && lookahead.contextualKeyword !== ContextualKeyword._from) { + // One of these `import type` cases: + // import type T = require('T'); + // import type A from 'A'; + expectContextual(ContextualKeyword._type); + if (lookaheadType() === tt.eq) { + tsParseImportEqualsDeclaration(); + return; + } + // If this is an `import type...from` statement, then we already ate the + // type token, so proceed to the regular import parser. + } else if (lookahead.type === tt.star || lookahead.type === tt.braceL) { + // One of these `import type` cases, in which case we can eat the type token + // and proceed as normal: + // import type * as A from 'A'; + // import type {a} from 'A'; + expectContextual(ContextualKeyword._type); + } + // Otherwise, we are importing the name "type". + } + + // import '...' + if (match(tt.string)) { + parseExprAtom(); + } else { + parseMaybeImportReflection(); + parseImportSpecifiers(); + expectContextual(ContextualKeyword._from); + parseExprAtom(); + } + maybeParseImportAttributes(); + semicolon(); +} + +// eslint-disable-next-line no-unused-vars +function shouldParseDefaultImport() { + return match(tt.name); +} + +function parseImportSpecifierLocal() { + parseImportedIdentifier(); +} + +// Parses a comma-separated list of module imports. +function parseImportSpecifiers() { + if (isFlowEnabled) { + flowStartParseImportSpecifiers(); + } + + let first = true; + if (shouldParseDefaultImport()) { + // import defaultObj, { x, y as z } from '...' + parseImportSpecifierLocal(); + + if (!eat(tt.comma)) return; + } + + if (match(tt.star)) { + next(); + expectContextual(ContextualKeyword._as); + + parseImportSpecifierLocal(); + + return; + } + + expect(tt.braceL); + while (!eat(tt.braceR) && !state.error) { + if (first) { + first = false; + } else { + // Detect an attempt to deep destructure + if (eat(tt.colon)) { + unexpected( + "ES2015 named imports do not destructure. Use another statement for destructuring after the import.", + ); + } + + expect(tt.comma); + if (eat(tt.braceR)) { + break; + } + } + + parseImportSpecifier(); + } +} + +function parseImportSpecifier() { + if (isTypeScriptEnabled) { + tsParseImportSpecifier(); + return; + } + if (isFlowEnabled) { + flowParseImportSpecifier(); + return; + } + parseImportedIdentifier(); + if (isContextual(ContextualKeyword._as)) { + state.tokens[state.tokens.length - 1].identifierRole = IdentifierRole.ImportAccess; + next(); + parseImportedIdentifier(); + } +} + +/** + * Parse import attributes like `with {type: "json"}`, or the legacy form + * `assert {type: "json"}`. + * + * Import attributes technically have their own syntax, but are always parseable + * as a plain JS object, so just do that for simplicity. + */ +function maybeParseImportAttributes() { + if (match(tt._with) || (isContextual(ContextualKeyword._assert) && !hasPrecedingLineBreak())) { + next(); + parseObj(false, false); + } +} Index: frontend/node_modules/sucrase/dist/esm/parser/traverser/util.js =================================================================== --- frontend/node_modules/sucrase/dist/esm/parser/traverser/util.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/esm/parser/traverser/util.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,104 @@ +import {eat, finishToken, lookaheadTypeAndKeyword, match, nextTokenStart} from "../tokenizer/index"; + +import {formatTokenType, TokenType as tt} from "../tokenizer/types"; +import {charCodes} from "../util/charcodes"; +import {input, state} from "./base"; + +// ## Parser utilities + +// Tests whether parsed token is a contextual keyword. +export function isContextual(contextualKeyword) { + return state.contextualKeyword === contextualKeyword; +} + +export function isLookaheadContextual(contextualKeyword) { + const l = lookaheadTypeAndKeyword(); + return l.type === tt.name && l.contextualKeyword === contextualKeyword; +} + +// Consumes contextual keyword if possible. +export function eatContextual(contextualKeyword) { + return state.contextualKeyword === contextualKeyword && eat(tt.name); +} + +// Asserts that following token is given contextual keyword. +export function expectContextual(contextualKeyword) { + if (!eatContextual(contextualKeyword)) { + unexpected(); + } +} + +// Test whether a semicolon can be inserted at the current position. +export function canInsertSemicolon() { + return match(tt.eof) || match(tt.braceR) || hasPrecedingLineBreak(); +} + +export function hasPrecedingLineBreak() { + const prevToken = state.tokens[state.tokens.length - 1]; + const lastTokEnd = prevToken ? prevToken.end : 0; + for (let i = lastTokEnd; i < state.start; i++) { + const code = input.charCodeAt(i); + if ( + code === charCodes.lineFeed || + code === charCodes.carriageReturn || + code === 0x2028 || + code === 0x2029 + ) { + return true; + } + } + return false; +} + +export function hasFollowingLineBreak() { + const nextStart = nextTokenStart(); + for (let i = state.end; i < nextStart; i++) { + const code = input.charCodeAt(i); + if ( + code === charCodes.lineFeed || + code === charCodes.carriageReturn || + code === 0x2028 || + code === 0x2029 + ) { + return true; + } + } + return false; +} + +export function isLineTerminator() { + return eat(tt.semi) || canInsertSemicolon(); +} + +// Consume a semicolon, or, failing that, see if we are allowed to +// pretend that there is a semicolon at this position. +export function semicolon() { + if (!isLineTerminator()) { + unexpected('Unexpected token, expected ";"'); + } +} + +// Expect a token of a given type. If found, consume it, otherwise, +// raise an unexpected token error at given pos. +export function expect(type) { + const matched = eat(type); + if (!matched) { + unexpected(`Unexpected token, expected "${formatTokenType(type)}"`); + } +} + +/** + * Transition the parser to an error state. All code needs to be written to naturally unwind in this + * state, which allows us to backtrack without exceptions and without error plumbing everywhere. + */ +export function unexpected(message = "Unexpected token", pos = state.start) { + if (state.error) { + return; + } + // eslint-disable-next-line @typescript-eslint/no-explicit-any + const err = new SyntaxError(message); + err.pos = pos; + state.error = err; + state.pos = input.length; + finishToken(tt.eof); +} Index: frontend/node_modules/sucrase/dist/esm/parser/util/charcodes.js =================================================================== --- frontend/node_modules/sucrase/dist/esm/parser/util/charcodes.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/esm/parser/util/charcodes.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,115 @@ +export var charCodes; (function (charCodes) { + const backSpace = 8; charCodes[charCodes["backSpace"] = backSpace] = "backSpace"; + const lineFeed = 10; charCodes[charCodes["lineFeed"] = lineFeed] = "lineFeed"; // '\n' + const tab = 9; charCodes[charCodes["tab"] = tab] = "tab"; // '\t' + const carriageReturn = 13; charCodes[charCodes["carriageReturn"] = carriageReturn] = "carriageReturn"; // '\r' + const shiftOut = 14; charCodes[charCodes["shiftOut"] = shiftOut] = "shiftOut"; + const space = 32; charCodes[charCodes["space"] = space] = "space"; + const exclamationMark = 33; charCodes[charCodes["exclamationMark"] = exclamationMark] = "exclamationMark"; // '!' + const quotationMark = 34; charCodes[charCodes["quotationMark"] = quotationMark] = "quotationMark"; // '"' + const numberSign = 35; charCodes[charCodes["numberSign"] = numberSign] = "numberSign"; // '#' + const dollarSign = 36; charCodes[charCodes["dollarSign"] = dollarSign] = "dollarSign"; // '$' + const percentSign = 37; charCodes[charCodes["percentSign"] = percentSign] = "percentSign"; // '%' + const ampersand = 38; charCodes[charCodes["ampersand"] = ampersand] = "ampersand"; // '&' + const apostrophe = 39; charCodes[charCodes["apostrophe"] = apostrophe] = "apostrophe"; // ''' + const leftParenthesis = 40; charCodes[charCodes["leftParenthesis"] = leftParenthesis] = "leftParenthesis"; // '(' + const rightParenthesis = 41; charCodes[charCodes["rightParenthesis"] = rightParenthesis] = "rightParenthesis"; // ')' + const asterisk = 42; charCodes[charCodes["asterisk"] = asterisk] = "asterisk"; // '*' + const plusSign = 43; charCodes[charCodes["plusSign"] = plusSign] = "plusSign"; // '+' + const comma = 44; charCodes[charCodes["comma"] = comma] = "comma"; // ',' + const dash = 45; charCodes[charCodes["dash"] = dash] = "dash"; // '-' + const dot = 46; charCodes[charCodes["dot"] = dot] = "dot"; // '.' + const slash = 47; charCodes[charCodes["slash"] = slash] = "slash"; // '/' + const digit0 = 48; charCodes[charCodes["digit0"] = digit0] = "digit0"; // '0' + const digit1 = 49; charCodes[charCodes["digit1"] = digit1] = "digit1"; // '1' + const digit2 = 50; charCodes[charCodes["digit2"] = digit2] = "digit2"; // '2' + const digit3 = 51; charCodes[charCodes["digit3"] = digit3] = "digit3"; // '3' + const digit4 = 52; charCodes[charCodes["digit4"] = digit4] = "digit4"; // '4' + const digit5 = 53; charCodes[charCodes["digit5"] = digit5] = "digit5"; // '5' + const digit6 = 54; charCodes[charCodes["digit6"] = digit6] = "digit6"; // '6' + const digit7 = 55; charCodes[charCodes["digit7"] = digit7] = "digit7"; // '7' + const digit8 = 56; charCodes[charCodes["digit8"] = digit8] = "digit8"; // '8' + const digit9 = 57; charCodes[charCodes["digit9"] = digit9] = "digit9"; // '9' + const colon = 58; charCodes[charCodes["colon"] = colon] = "colon"; // ':' + const semicolon = 59; charCodes[charCodes["semicolon"] = semicolon] = "semicolon"; // ';' + const lessThan = 60; charCodes[charCodes["lessThan"] = lessThan] = "lessThan"; // '<' + const equalsTo = 61; charCodes[charCodes["equalsTo"] = equalsTo] = "equalsTo"; // '=' + const greaterThan = 62; charCodes[charCodes["greaterThan"] = greaterThan] = "greaterThan"; // '>' + const questionMark = 63; charCodes[charCodes["questionMark"] = questionMark] = "questionMark"; // '?' + const atSign = 64; charCodes[charCodes["atSign"] = atSign] = "atSign"; // '@' + const uppercaseA = 65; charCodes[charCodes["uppercaseA"] = uppercaseA] = "uppercaseA"; // 'A' + const uppercaseB = 66; charCodes[charCodes["uppercaseB"] = uppercaseB] = "uppercaseB"; // 'B' + const uppercaseC = 67; charCodes[charCodes["uppercaseC"] = uppercaseC] = "uppercaseC"; // 'C' + const uppercaseD = 68; charCodes[charCodes["uppercaseD"] = uppercaseD] = "uppercaseD"; // 'D' + const uppercaseE = 69; charCodes[charCodes["uppercaseE"] = uppercaseE] = "uppercaseE"; // 'E' + const uppercaseF = 70; charCodes[charCodes["uppercaseF"] = uppercaseF] = "uppercaseF"; // 'F' + const uppercaseG = 71; charCodes[charCodes["uppercaseG"] = uppercaseG] = "uppercaseG"; // 'G' + const uppercaseH = 72; charCodes[charCodes["uppercaseH"] = uppercaseH] = "uppercaseH"; // 'H' + const uppercaseI = 73; charCodes[charCodes["uppercaseI"] = uppercaseI] = "uppercaseI"; // 'I' + const uppercaseJ = 74; charCodes[charCodes["uppercaseJ"] = uppercaseJ] = "uppercaseJ"; // 'J' + const uppercaseK = 75; charCodes[charCodes["uppercaseK"] = uppercaseK] = "uppercaseK"; // 'K' + const uppercaseL = 76; charCodes[charCodes["uppercaseL"] = uppercaseL] = "uppercaseL"; // 'L' + const uppercaseM = 77; charCodes[charCodes["uppercaseM"] = uppercaseM] = "uppercaseM"; // 'M' + const uppercaseN = 78; charCodes[charCodes["uppercaseN"] = uppercaseN] = "uppercaseN"; // 'N' + const uppercaseO = 79; charCodes[charCodes["uppercaseO"] = uppercaseO] = "uppercaseO"; // 'O' + const uppercaseP = 80; charCodes[charCodes["uppercaseP"] = uppercaseP] = "uppercaseP"; // 'P' + const uppercaseQ = 81; charCodes[charCodes["uppercaseQ"] = uppercaseQ] = "uppercaseQ"; // 'Q' + const uppercaseR = 82; charCodes[charCodes["uppercaseR"] = uppercaseR] = "uppercaseR"; // 'R' + const uppercaseS = 83; charCodes[charCodes["uppercaseS"] = uppercaseS] = "uppercaseS"; // 'S' + const uppercaseT = 84; charCodes[charCodes["uppercaseT"] = uppercaseT] = "uppercaseT"; // 'T' + const uppercaseU = 85; charCodes[charCodes["uppercaseU"] = uppercaseU] = "uppercaseU"; // 'U' + const uppercaseV = 86; charCodes[charCodes["uppercaseV"] = uppercaseV] = "uppercaseV"; // 'V' + const uppercaseW = 87; charCodes[charCodes["uppercaseW"] = uppercaseW] = "uppercaseW"; // 'W' + const uppercaseX = 88; charCodes[charCodes["uppercaseX"] = uppercaseX] = "uppercaseX"; // 'X' + const uppercaseY = 89; charCodes[charCodes["uppercaseY"] = uppercaseY] = "uppercaseY"; // 'Y' + const uppercaseZ = 90; charCodes[charCodes["uppercaseZ"] = uppercaseZ] = "uppercaseZ"; // 'Z' + const leftSquareBracket = 91; charCodes[charCodes["leftSquareBracket"] = leftSquareBracket] = "leftSquareBracket"; // '[' + const backslash = 92; charCodes[charCodes["backslash"] = backslash] = "backslash"; // '\ ' + const rightSquareBracket = 93; charCodes[charCodes["rightSquareBracket"] = rightSquareBracket] = "rightSquareBracket"; // ']' + const caret = 94; charCodes[charCodes["caret"] = caret] = "caret"; // '^' + const underscore = 95; charCodes[charCodes["underscore"] = underscore] = "underscore"; // '_' + const graveAccent = 96; charCodes[charCodes["graveAccent"] = graveAccent] = "graveAccent"; // '`' + const lowercaseA = 97; charCodes[charCodes["lowercaseA"] = lowercaseA] = "lowercaseA"; // 'a' + const lowercaseB = 98; charCodes[charCodes["lowercaseB"] = lowercaseB] = "lowercaseB"; // 'b' + const lowercaseC = 99; charCodes[charCodes["lowercaseC"] = lowercaseC] = "lowercaseC"; // 'c' + const lowercaseD = 100; charCodes[charCodes["lowercaseD"] = lowercaseD] = "lowercaseD"; // 'd' + const lowercaseE = 101; charCodes[charCodes["lowercaseE"] = lowercaseE] = "lowercaseE"; // 'e' + const lowercaseF = 102; charCodes[charCodes["lowercaseF"] = lowercaseF] = "lowercaseF"; // 'f' + const lowercaseG = 103; charCodes[charCodes["lowercaseG"] = lowercaseG] = "lowercaseG"; // 'g' + const lowercaseH = 104; charCodes[charCodes["lowercaseH"] = lowercaseH] = "lowercaseH"; // 'h' + const lowercaseI = 105; charCodes[charCodes["lowercaseI"] = lowercaseI] = "lowercaseI"; // 'i' + const lowercaseJ = 106; charCodes[charCodes["lowercaseJ"] = lowercaseJ] = "lowercaseJ"; // 'j' + const lowercaseK = 107; charCodes[charCodes["lowercaseK"] = lowercaseK] = "lowercaseK"; // 'k' + const lowercaseL = 108; charCodes[charCodes["lowercaseL"] = lowercaseL] = "lowercaseL"; // 'l' + const lowercaseM = 109; charCodes[charCodes["lowercaseM"] = lowercaseM] = "lowercaseM"; // 'm' + const lowercaseN = 110; charCodes[charCodes["lowercaseN"] = lowercaseN] = "lowercaseN"; // 'n' + const lowercaseO = 111; charCodes[charCodes["lowercaseO"] = lowercaseO] = "lowercaseO"; // 'o' + const lowercaseP = 112; charCodes[charCodes["lowercaseP"] = lowercaseP] = "lowercaseP"; // 'p' + const lowercaseQ = 113; charCodes[charCodes["lowercaseQ"] = lowercaseQ] = "lowercaseQ"; // 'q' + const lowercaseR = 114; charCodes[charCodes["lowercaseR"] = lowercaseR] = "lowercaseR"; // 'r' + const lowercaseS = 115; charCodes[charCodes["lowercaseS"] = lowercaseS] = "lowercaseS"; // 's' + const lowercaseT = 116; charCodes[charCodes["lowercaseT"] = lowercaseT] = "lowercaseT"; // 't' + const lowercaseU = 117; charCodes[charCodes["lowercaseU"] = lowercaseU] = "lowercaseU"; // 'u' + const lowercaseV = 118; charCodes[charCodes["lowercaseV"] = lowercaseV] = "lowercaseV"; // 'v' + const lowercaseW = 119; charCodes[charCodes["lowercaseW"] = lowercaseW] = "lowercaseW"; // 'w' + const lowercaseX = 120; charCodes[charCodes["lowercaseX"] = lowercaseX] = "lowercaseX"; // 'x' + const lowercaseY = 121; charCodes[charCodes["lowercaseY"] = lowercaseY] = "lowercaseY"; // 'y' + const lowercaseZ = 122; charCodes[charCodes["lowercaseZ"] = lowercaseZ] = "lowercaseZ"; // 'z' + const leftCurlyBrace = 123; charCodes[charCodes["leftCurlyBrace"] = leftCurlyBrace] = "leftCurlyBrace"; // '{' + const verticalBar = 124; charCodes[charCodes["verticalBar"] = verticalBar] = "verticalBar"; // '|' + const rightCurlyBrace = 125; charCodes[charCodes["rightCurlyBrace"] = rightCurlyBrace] = "rightCurlyBrace"; // '}' + const tilde = 126; charCodes[charCodes["tilde"] = tilde] = "tilde"; // '~' + const nonBreakingSpace = 160; charCodes[charCodes["nonBreakingSpace"] = nonBreakingSpace] = "nonBreakingSpace"; + // eslint-disable-next-line no-irregular-whitespace + const oghamSpaceMark = 5760; charCodes[charCodes["oghamSpaceMark"] = oghamSpaceMark] = "oghamSpaceMark"; // ' ' + const lineSeparator = 8232; charCodes[charCodes["lineSeparator"] = lineSeparator] = "lineSeparator"; + const paragraphSeparator = 8233; charCodes[charCodes["paragraphSeparator"] = paragraphSeparator] = "paragraphSeparator"; +})(charCodes || (charCodes = {})); + +export function isDigit(code) { + return ( + (code >= charCodes.digit0 && code <= charCodes.digit9) || + (code >= charCodes.lowercaseA && code <= charCodes.lowercaseF) || + (code >= charCodes.uppercaseA && code <= charCodes.uppercaseF) + ); +} Index: frontend/node_modules/sucrase/dist/esm/parser/util/identifier.js =================================================================== --- frontend/node_modules/sucrase/dist/esm/parser/util/identifier.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/esm/parser/util/identifier.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,34 @@ +import {charCodes} from "./charcodes"; +import {WHITESPACE_CHARS} from "./whitespace"; + +function computeIsIdentifierChar(code) { + if (code < 48) return code === 36; + if (code < 58) return true; + if (code < 65) return false; + if (code < 91) return true; + if (code < 97) return code === 95; + if (code < 123) return true; + if (code < 128) return false; + throw new Error("Should not be called with non-ASCII char code."); +} + +export const IS_IDENTIFIER_CHAR = new Uint8Array(65536); +for (let i = 0; i < 128; i++) { + IS_IDENTIFIER_CHAR[i] = computeIsIdentifierChar(i) ? 1 : 0; +} +for (let i = 128; i < 65536; i++) { + IS_IDENTIFIER_CHAR[i] = 1; +} +// Aside from whitespace and newlines, all characters outside the ASCII space are either +// identifier characters or invalid. Since we're not performing code validation, we can just +// treat all invalid characters as identifier characters. +for (const whitespaceChar of WHITESPACE_CHARS) { + IS_IDENTIFIER_CHAR[whitespaceChar] = 0; +} +IS_IDENTIFIER_CHAR[0x2028] = 0; +IS_IDENTIFIER_CHAR[0x2029] = 0; + +export const IS_IDENTIFIER_START = IS_IDENTIFIER_CHAR.slice(); +for (let numChar = charCodes.digit0; numChar <= charCodes.digit9; numChar++) { + IS_IDENTIFIER_START[numChar] = 0; +} Index: frontend/node_modules/sucrase/dist/esm/parser/util/whitespace.js =================================================================== --- frontend/node_modules/sucrase/dist/esm/parser/util/whitespace.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/esm/parser/util/whitespace.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,33 @@ +import {charCodes} from "./charcodes"; + +// https://tc39.github.io/ecma262/#sec-white-space +export const WHITESPACE_CHARS = [ + 0x0009, + 0x000b, + 0x000c, + charCodes.space, + charCodes.nonBreakingSpace, + charCodes.oghamSpaceMark, + 0x2000, // EN QUAD + 0x2001, // EM QUAD + 0x2002, // EN SPACE + 0x2003, // EM SPACE + 0x2004, // THREE-PER-EM SPACE + 0x2005, // FOUR-PER-EM SPACE + 0x2006, // SIX-PER-EM SPACE + 0x2007, // FIGURE SPACE + 0x2008, // PUNCTUATION SPACE + 0x2009, // THIN SPACE + 0x200a, // HAIR SPACE + 0x202f, // NARROW NO-BREAK SPACE + 0x205f, // MEDIUM MATHEMATICAL SPACE + 0x3000, // IDEOGRAPHIC SPACE + 0xfeff, // ZERO WIDTH NO-BREAK SPACE +]; + +export const skipWhiteSpace = /(?:\s|\/\/.*|\/\*[^]*?\*\/)*/g; + +export const IS_WHITESPACE = new Uint8Array(65536); +for (const char of WHITESPACE_CHARS) { + IS_WHITESPACE[char] = 1; +} Index: frontend/node_modules/sucrase/dist/esm/register.js =================================================================== --- frontend/node_modules/sucrase/dist/esm/register.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/esm/register.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,88 @@ +import * as pirates from "pirates"; + +import { transform} from "./index"; + + + + + + + + +export function addHook( + extension, + sucraseOptions, + hookOptions, +) { + let mergedSucraseOptions = sucraseOptions; + const sucraseOptionsEnvJSON = process.env.SUCRASE_OPTIONS; + if (sucraseOptionsEnvJSON) { + mergedSucraseOptions = {...mergedSucraseOptions, ...JSON.parse(sucraseOptionsEnvJSON)}; + } + return pirates.addHook( + (code, filePath) => { + const {code: transformedCode, sourceMap} = transform(code, { + ...mergedSucraseOptions, + sourceMapOptions: {compiledFilename: filePath}, + filePath, + }); + const mapBase64 = Buffer.from(JSON.stringify(sourceMap)).toString("base64"); + const suffix = `//# sourceMappingURL=data:application/json;charset=utf-8;base64,${mapBase64}`; + return `${transformedCode}\n${suffix}`; + }, + {...hookOptions, exts: [extension]}, + ); +} + +export function registerJS(hookOptions) { + return addHook(".js", {transforms: ["imports", "flow", "jsx"]}, hookOptions); +} + +export function registerJSX(hookOptions) { + return addHook(".jsx", {transforms: ["imports", "flow", "jsx"]}, hookOptions); +} + +export function registerTS(hookOptions) { + return addHook(".ts", {transforms: ["imports", "typescript"]}, hookOptions); +} + +export function registerTSX(hookOptions) { + return addHook(".tsx", {transforms: ["imports", "typescript", "jsx"]}, hookOptions); +} + +export function registerTSLegacyModuleInterop(hookOptions) { + return addHook( + ".ts", + { + transforms: ["imports", "typescript"], + enableLegacyTypeScriptModuleInterop: true, + }, + hookOptions, + ); +} + +export function registerTSXLegacyModuleInterop(hookOptions) { + return addHook( + ".tsx", + { + transforms: ["imports", "typescript", "jsx"], + enableLegacyTypeScriptModuleInterop: true, + }, + hookOptions, + ); +} + +export function registerAll(hookOptions) { + const reverts = [ + registerJS(hookOptions), + registerJSX(hookOptions), + registerTS(hookOptions), + registerTSX(hookOptions), + ]; + + return () => { + for (const fn of reverts) { + fn(); + } + }; +} Index: frontend/node_modules/sucrase/dist/esm/transformers/CJSImportTransformer.js =================================================================== --- frontend/node_modules/sucrase/dist/esm/transformers/CJSImportTransformer.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/esm/transformers/CJSImportTransformer.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,916 @@ + + + +import {IdentifierRole, isDeclaration, isObjectShorthandDeclaration} from "../parser/tokenizer"; +import {ContextualKeyword} from "../parser/tokenizer/keywords"; +import {TokenType as tt} from "../parser/tokenizer/types"; + +import elideImportEquals from "../util/elideImportEquals"; +import getDeclarationInfo, { + + EMPTY_DECLARATION_INFO, +} from "../util/getDeclarationInfo"; +import getImportExportSpecifierInfo from "../util/getImportExportSpecifierInfo"; +import isExportFrom from "../util/isExportFrom"; +import {removeMaybeImportAttributes} from "../util/removeMaybeImportAttributes"; +import shouldElideDefaultExport from "../util/shouldElideDefaultExport"; + + +import Transformer from "./Transformer"; + +/** + * Class for editing import statements when we are transforming to commonjs. + */ +export default class CJSImportTransformer extends Transformer { + __init() {this.hadExport = false} + __init2() {this.hadNamedExport = false} + __init3() {this.hadDefaultExport = false} + + + constructor( + rootTransformer, + tokens, + importProcessor, + nameManager, + helperManager, + reactHotLoaderTransformer, + enableLegacyBabel5ModuleInterop, + enableLegacyTypeScriptModuleInterop, + isTypeScriptTransformEnabled, + isFlowTransformEnabled, + preserveDynamicImport, + keepUnusedImports, + ) { + super();this.rootTransformer = rootTransformer;this.tokens = tokens;this.importProcessor = importProcessor;this.nameManager = nameManager;this.helperManager = helperManager;this.reactHotLoaderTransformer = reactHotLoaderTransformer;this.enableLegacyBabel5ModuleInterop = enableLegacyBabel5ModuleInterop;this.enableLegacyTypeScriptModuleInterop = enableLegacyTypeScriptModuleInterop;this.isTypeScriptTransformEnabled = isTypeScriptTransformEnabled;this.isFlowTransformEnabled = isFlowTransformEnabled;this.preserveDynamicImport = preserveDynamicImport;this.keepUnusedImports = keepUnusedImports;CJSImportTransformer.prototype.__init.call(this);CJSImportTransformer.prototype.__init2.call(this);CJSImportTransformer.prototype.__init3.call(this);; + this.declarationInfo = isTypeScriptTransformEnabled + ? getDeclarationInfo(tokens) + : EMPTY_DECLARATION_INFO; + } + + getPrefixCode() { + let prefix = ""; + if (this.hadExport) { + prefix += 'Object.defineProperty(exports, "__esModule", {value: true});'; + } + return prefix; + } + + getSuffixCode() { + if (this.enableLegacyBabel5ModuleInterop && this.hadDefaultExport && !this.hadNamedExport) { + return "\nmodule.exports = exports.default;\n"; + } + return ""; + } + + process() { + // TypeScript `import foo = require('foo');` should always just be translated to plain require. + if (this.tokens.matches3(tt._import, tt.name, tt.eq)) { + return this.processImportEquals(); + } + if (this.tokens.matches1(tt._import)) { + this.processImport(); + return true; + } + if (this.tokens.matches2(tt._export, tt.eq)) { + this.tokens.replaceToken("module.exports"); + return true; + } + if (this.tokens.matches1(tt._export) && !this.tokens.currentToken().isType) { + this.hadExport = true; + return this.processExport(); + } + if (this.tokens.matches2(tt.name, tt.postIncDec)) { + // Fall through to normal identifier matching if this doesn't apply. + if (this.processPostIncDec()) { + return true; + } + } + if (this.tokens.matches1(tt.name) || this.tokens.matches1(tt.jsxName)) { + return this.processIdentifier(); + } + if (this.tokens.matches1(tt.eq)) { + return this.processAssignment(); + } + if (this.tokens.matches1(tt.assign)) { + return this.processComplexAssignment(); + } + if (this.tokens.matches1(tt.preIncDec)) { + return this.processPreIncDec(); + } + return false; + } + + processImportEquals() { + const importName = this.tokens.identifierNameAtIndex(this.tokens.currentIndex() + 1); + if (this.importProcessor.shouldAutomaticallyElideImportedName(importName)) { + // If this name is only used as a type, elide the whole import. + elideImportEquals(this.tokens); + } else { + // Otherwise, switch `import` to `const`. + this.tokens.replaceToken("const"); + } + return true; + } + + /** + * Transform this: + * import foo, {bar} from 'baz'; + * into + * var _baz = require('baz'); var _baz2 = _interopRequireDefault(_baz); + * + * The import code was already generated in the import preprocessing step, so + * we just need to look it up. + */ + processImport() { + if (this.tokens.matches2(tt._import, tt.parenL)) { + if (this.preserveDynamicImport) { + // Bail out, only making progress for this one token. + this.tokens.copyToken(); + return; + } + const requireWrapper = this.enableLegacyTypeScriptModuleInterop + ? "" + : `${this.helperManager.getHelperName("interopRequireWildcard")}(`; + this.tokens.replaceToken(`Promise.resolve().then(() => ${requireWrapper}require`); + const contextId = this.tokens.currentToken().contextId; + if (contextId == null) { + throw new Error("Expected context ID on dynamic import invocation."); + } + this.tokens.copyToken(); + while (!this.tokens.matchesContextIdAndLabel(tt.parenR, contextId)) { + this.rootTransformer.processToken(); + } + this.tokens.replaceToken(requireWrapper ? ")))" : "))"); + return; + } + + const shouldElideImport = this.removeImportAndDetectIfShouldElide(); + if (shouldElideImport) { + this.tokens.removeToken(); + } else { + const path = this.tokens.stringValue(); + this.tokens.replaceTokenTrimmingLeftWhitespace(this.importProcessor.claimImportCode(path)); + this.tokens.appendCode(this.importProcessor.claimImportCode(path)); + } + removeMaybeImportAttributes(this.tokens); + if (this.tokens.matches1(tt.semi)) { + this.tokens.removeToken(); + } + } + + /** + * Erase this import (since any CJS output would be completely different), and + * return true if this import is should be elided due to being a type-only + * import. Such imports will not be emitted at all to avoid side effects. + * + * Import elision only happens with the TypeScript or Flow transforms enabled. + * + * TODO: This function has some awkward overlap with + * CJSImportProcessor.pruneTypeOnlyImports , and the two should be unified. + * That function handles TypeScript implicit import name elision, and removes + * an import if all typical imported names (without `type`) are removed due + * to being type-only imports. This function handles Flow import removal and + * properly distinguishes `import 'foo'` from `import {} from 'foo'` for TS + * purposes. + * + * The position should end at the import string. + */ + removeImportAndDetectIfShouldElide() { + this.tokens.removeInitialToken(); + if ( + this.tokens.matchesContextual(ContextualKeyword._type) && + !this.tokens.matches1AtIndex(this.tokens.currentIndex() + 1, tt.comma) && + !this.tokens.matchesContextualAtIndex(this.tokens.currentIndex() + 1, ContextualKeyword._from) + ) { + // This is an "import type" statement, so exit early. + this.removeRemainingImport(); + return true; + } + + if (this.tokens.matches1(tt.name) || this.tokens.matches1(tt.star)) { + // We have a default import or namespace import, so there must be some + // non-type import. + this.removeRemainingImport(); + return false; + } + + if (this.tokens.matches1(tt.string)) { + // This is a bare import, so we should proceed with the import. + return false; + } + + let foundNonTypeImport = false; + let foundAnyNamedImport = false; + while (!this.tokens.matches1(tt.string)) { + // Check if any named imports are of the form "foo" or "foo as bar", with + // no leading "type". + if ( + (!foundNonTypeImport && this.tokens.matches1(tt.braceL)) || + this.tokens.matches1(tt.comma) + ) { + this.tokens.removeToken(); + if (!this.tokens.matches1(tt.braceR)) { + foundAnyNamedImport = true; + } + if ( + this.tokens.matches2(tt.name, tt.comma) || + this.tokens.matches2(tt.name, tt.braceR) || + this.tokens.matches4(tt.name, tt.name, tt.name, tt.comma) || + this.tokens.matches4(tt.name, tt.name, tt.name, tt.braceR) + ) { + foundNonTypeImport = true; + } + } + this.tokens.removeToken(); + } + if (this.keepUnusedImports) { + return false; + } + if (this.isTypeScriptTransformEnabled) { + return !foundNonTypeImport; + } else if (this.isFlowTransformEnabled) { + // In Flow, unlike TS, `import {} from 'foo';` preserves the import. + return foundAnyNamedImport && !foundNonTypeImport; + } else { + return false; + } + } + + removeRemainingImport() { + while (!this.tokens.matches1(tt.string)) { + this.tokens.removeToken(); + } + } + + processIdentifier() { + const token = this.tokens.currentToken(); + if (token.shadowsGlobal) { + return false; + } + + if (token.identifierRole === IdentifierRole.ObjectShorthand) { + return this.processObjectShorthand(); + } + + if (token.identifierRole !== IdentifierRole.Access) { + return false; + } + const replacement = this.importProcessor.getIdentifierReplacement( + this.tokens.identifierNameForToken(token), + ); + if (!replacement) { + return false; + } + // Tolerate any number of closing parens while looking for an opening paren + // that indicates a function call. + let possibleOpenParenIndex = this.tokens.currentIndex() + 1; + while ( + possibleOpenParenIndex < this.tokens.tokens.length && + this.tokens.tokens[possibleOpenParenIndex].type === tt.parenR + ) { + possibleOpenParenIndex++; + } + // Avoid treating imported functions as methods of their `exports` object + // by using `(0, f)` when the identifier is in a paren expression. Else + // use `Function.prototype.call` when the identifier is a guaranteed + // function call. When using `call`, pass undefined as the context. + if (this.tokens.tokens[possibleOpenParenIndex].type === tt.parenL) { + if ( + this.tokens.tokenAtRelativeIndex(1).type === tt.parenL && + this.tokens.tokenAtRelativeIndex(-1).type !== tt._new + ) { + this.tokens.replaceToken(`${replacement}.call(void 0, `); + // Remove the old paren. + this.tokens.removeToken(); + // Balance out the new paren. + this.rootTransformer.processBalancedCode(); + this.tokens.copyExpectedToken(tt.parenR); + } else { + // See here: http://2ality.com/2015/12/references.html + this.tokens.replaceToken(`(0, ${replacement})`); + } + } else { + this.tokens.replaceToken(replacement); + } + return true; + } + + processObjectShorthand() { + const identifier = this.tokens.identifierName(); + const replacement = this.importProcessor.getIdentifierReplacement(identifier); + if (!replacement) { + return false; + } + this.tokens.replaceToken(`${identifier}: ${replacement}`); + return true; + } + + processExport() { + if ( + this.tokens.matches2(tt._export, tt._enum) || + this.tokens.matches3(tt._export, tt._const, tt._enum) + ) { + this.hadNamedExport = true; + // Let the TypeScript transform handle it. + return false; + } + if (this.tokens.matches2(tt._export, tt._default)) { + if (this.tokens.matches3(tt._export, tt._default, tt._enum)) { + this.hadDefaultExport = true; + // Flow export default enums need some special handling, so handle them + // in that tranform rather than this one. + return false; + } + this.processExportDefault(); + return true; + } else if (this.tokens.matches2(tt._export, tt.braceL)) { + this.processExportBindings(); + return true; + } else if ( + this.tokens.matches2(tt._export, tt.name) && + this.tokens.matchesContextualAtIndex(this.tokens.currentIndex() + 1, ContextualKeyword._type) + ) { + // export type {a}; + // export type {a as b}; + // export type {a} from './b'; + // export type * from './b'; + // export type * as ns from './b'; + this.tokens.removeInitialToken(); + this.tokens.removeToken(); + if (this.tokens.matches1(tt.braceL)) { + while (!this.tokens.matches1(tt.braceR)) { + this.tokens.removeToken(); + } + this.tokens.removeToken(); + } else { + // * + this.tokens.removeToken(); + if (this.tokens.matches1(tt._as)) { + // as + this.tokens.removeToken(); + // ns + this.tokens.removeToken(); + } + } + // Remove type re-export `... } from './T'` + if ( + this.tokens.matchesContextual(ContextualKeyword._from) && + this.tokens.matches1AtIndex(this.tokens.currentIndex() + 1, tt.string) + ) { + this.tokens.removeToken(); + this.tokens.removeToken(); + removeMaybeImportAttributes(this.tokens); + } + return true; + } + this.hadNamedExport = true; + if ( + this.tokens.matches2(tt._export, tt._var) || + this.tokens.matches2(tt._export, tt._let) || + this.tokens.matches2(tt._export, tt._const) + ) { + this.processExportVar(); + return true; + } else if ( + this.tokens.matches2(tt._export, tt._function) || + // export async function + this.tokens.matches3(tt._export, tt.name, tt._function) + ) { + this.processExportFunction(); + return true; + } else if ( + this.tokens.matches2(tt._export, tt._class) || + this.tokens.matches3(tt._export, tt._abstract, tt._class) || + this.tokens.matches2(tt._export, tt.at) + ) { + this.processExportClass(); + return true; + } else if (this.tokens.matches2(tt._export, tt.star)) { + this.processExportStar(); + return true; + } else { + throw new Error("Unrecognized export syntax."); + } + } + + processAssignment() { + const index = this.tokens.currentIndex(); + const identifierToken = this.tokens.tokens[index - 1]; + // If the LHS is a type identifier, this must be a declaration like `let a: b = c;`, + // with `b` as the identifier, so nothing needs to be done in that case. + if (identifierToken.isType || identifierToken.type !== tt.name) { + return false; + } + if (identifierToken.shadowsGlobal) { + return false; + } + if (index >= 2 && this.tokens.matches1AtIndex(index - 2, tt.dot)) { + return false; + } + if (index >= 2 && [tt._var, tt._let, tt._const].includes(this.tokens.tokens[index - 2].type)) { + // Declarations don't need an extra assignment. This doesn't avoid the + // assignment for comma-separated declarations, but it's still correct + // since the assignment is just redundant. + return false; + } + const assignmentSnippet = this.importProcessor.resolveExportBinding( + this.tokens.identifierNameForToken(identifierToken), + ); + if (!assignmentSnippet) { + return false; + } + this.tokens.copyToken(); + this.tokens.appendCode(` ${assignmentSnippet} =`); + return true; + } + + /** + * Process something like `a += 3`, where `a` might be an exported value. + */ + processComplexAssignment() { + const index = this.tokens.currentIndex(); + const identifierToken = this.tokens.tokens[index - 1]; + if (identifierToken.type !== tt.name) { + return false; + } + if (identifierToken.shadowsGlobal) { + return false; + } + if (index >= 2 && this.tokens.matches1AtIndex(index - 2, tt.dot)) { + return false; + } + const assignmentSnippet = this.importProcessor.resolveExportBinding( + this.tokens.identifierNameForToken(identifierToken), + ); + if (!assignmentSnippet) { + return false; + } + this.tokens.appendCode(` = ${assignmentSnippet}`); + this.tokens.copyToken(); + return true; + } + + /** + * Process something like `++a`, where `a` might be an exported value. + */ + processPreIncDec() { + const index = this.tokens.currentIndex(); + const identifierToken = this.tokens.tokens[index + 1]; + if (identifierToken.type !== tt.name) { + return false; + } + if (identifierToken.shadowsGlobal) { + return false; + } + // Ignore things like ++a.b and ++a[b] and ++a().b. + if ( + index + 2 < this.tokens.tokens.length && + (this.tokens.matches1AtIndex(index + 2, tt.dot) || + this.tokens.matches1AtIndex(index + 2, tt.bracketL) || + this.tokens.matches1AtIndex(index + 2, tt.parenL)) + ) { + return false; + } + const identifierName = this.tokens.identifierNameForToken(identifierToken); + const assignmentSnippet = this.importProcessor.resolveExportBinding(identifierName); + if (!assignmentSnippet) { + return false; + } + this.tokens.appendCode(`${assignmentSnippet} = `); + this.tokens.copyToken(); + return true; + } + + /** + * Process something like `a++`, where `a` might be an exported value. + * This starts at the `a`, not at the `++`. + */ + processPostIncDec() { + const index = this.tokens.currentIndex(); + const identifierToken = this.tokens.tokens[index]; + const operatorToken = this.tokens.tokens[index + 1]; + if (identifierToken.type !== tt.name) { + return false; + } + if (identifierToken.shadowsGlobal) { + return false; + } + if (index >= 1 && this.tokens.matches1AtIndex(index - 1, tt.dot)) { + return false; + } + const identifierName = this.tokens.identifierNameForToken(identifierToken); + const assignmentSnippet = this.importProcessor.resolveExportBinding(identifierName); + if (!assignmentSnippet) { + return false; + } + const operatorCode = this.tokens.rawCodeForToken(operatorToken); + // We might also replace the identifier with something like exports.x, so + // do that replacement here as well. + const base = this.importProcessor.getIdentifierReplacement(identifierName) || identifierName; + if (operatorCode === "++") { + this.tokens.replaceToken(`(${base} = ${assignmentSnippet} = ${base} + 1, ${base} - 1)`); + } else if (operatorCode === "--") { + this.tokens.replaceToken(`(${base} = ${assignmentSnippet} = ${base} - 1, ${base} + 1)`); + } else { + throw new Error(`Unexpected operator: ${operatorCode}`); + } + this.tokens.removeToken(); + return true; + } + + processExportDefault() { + let exportedRuntimeValue = true; + if ( + this.tokens.matches4(tt._export, tt._default, tt._function, tt.name) || + // export default async function + (this.tokens.matches5(tt._export, tt._default, tt.name, tt._function, tt.name) && + this.tokens.matchesContextualAtIndex( + this.tokens.currentIndex() + 2, + ContextualKeyword._async, + )) + ) { + this.tokens.removeInitialToken(); + this.tokens.removeToken(); + // Named function export case: change it to a top-level function + // declaration followed by exports statement. + const name = this.processNamedFunction(); + this.tokens.appendCode(` exports.default = ${name};`); + } else if ( + this.tokens.matches4(tt._export, tt._default, tt._class, tt.name) || + this.tokens.matches5(tt._export, tt._default, tt._abstract, tt._class, tt.name) || + this.tokens.matches3(tt._export, tt._default, tt.at) + ) { + this.tokens.removeInitialToken(); + this.tokens.removeToken(); + this.copyDecorators(); + if (this.tokens.matches1(tt._abstract)) { + this.tokens.removeToken(); + } + const name = this.rootTransformer.processNamedClass(); + this.tokens.appendCode(` exports.default = ${name};`); + // After this point, this is a plain "export default E" statement. + } else if ( + shouldElideDefaultExport( + this.isTypeScriptTransformEnabled, + this.keepUnusedImports, + this.tokens, + this.declarationInfo, + ) + ) { + // If the exported value is just an identifier and should be elided by TypeScript + // rules, then remove it entirely. It will always have the form `export default e`, + // where `e` is an identifier. + exportedRuntimeValue = false; + this.tokens.removeInitialToken(); + this.tokens.removeToken(); + this.tokens.removeToken(); + } else if (this.reactHotLoaderTransformer) { + // We need to assign E to a variable. Change "export default E" to + // "let _default; exports.default = _default = E" + const defaultVarName = this.nameManager.claimFreeName("_default"); + this.tokens.replaceToken(`let ${defaultVarName}; exports.`); + this.tokens.copyToken(); + this.tokens.appendCode(` = ${defaultVarName} =`); + this.reactHotLoaderTransformer.setExtractedDefaultExportName(defaultVarName); + } else { + // Change "export default E" to "exports.default = E" + this.tokens.replaceToken("exports."); + this.tokens.copyToken(); + this.tokens.appendCode(" ="); + } + if (exportedRuntimeValue) { + this.hadDefaultExport = true; + } + } + + copyDecorators() { + while (this.tokens.matches1(tt.at)) { + this.tokens.copyToken(); + if (this.tokens.matches1(tt.parenL)) { + this.tokens.copyExpectedToken(tt.parenL); + this.rootTransformer.processBalancedCode(); + this.tokens.copyExpectedToken(tt.parenR); + } else { + this.tokens.copyExpectedToken(tt.name); + while (this.tokens.matches1(tt.dot)) { + this.tokens.copyExpectedToken(tt.dot); + this.tokens.copyExpectedToken(tt.name); + } + if (this.tokens.matches1(tt.parenL)) { + this.tokens.copyExpectedToken(tt.parenL); + this.rootTransformer.processBalancedCode(); + this.tokens.copyExpectedToken(tt.parenR); + } + } + } + } + + /** + * Transform a declaration like `export var`, `export let`, or `export const`. + */ + processExportVar() { + if (this.isSimpleExportVar()) { + this.processSimpleExportVar(); + } else { + this.processComplexExportVar(); + } + } + + /** + * Determine if the export is of the form: + * export var/let/const [varName] = [expr]; + * In other words, determine if function name inference might apply. + */ + isSimpleExportVar() { + let tokenIndex = this.tokens.currentIndex(); + // export + tokenIndex++; + // var/let/const + tokenIndex++; + if (!this.tokens.matches1AtIndex(tokenIndex, tt.name)) { + return false; + } + tokenIndex++; + while (tokenIndex < this.tokens.tokens.length && this.tokens.tokens[tokenIndex].isType) { + tokenIndex++; + } + if (!this.tokens.matches1AtIndex(tokenIndex, tt.eq)) { + return false; + } + return true; + } + + /** + * Transform an `export var` declaration initializing a single variable. + * + * For example, this: + * export const f = () => {}; + * becomes this: + * const f = () => {}; exports.f = f; + * + * The variable is unused (e.g. exports.f has the true value of the export). + * We need to produce an assignment of this form so that the function will + * have an inferred name of "f", which wouldn't happen in the more general + * case below. + */ + processSimpleExportVar() { + // export + this.tokens.removeInitialToken(); + // var/let/const + this.tokens.copyToken(); + const varName = this.tokens.identifierName(); + // x: number -> x + while (!this.tokens.matches1(tt.eq)) { + this.rootTransformer.processToken(); + } + const endIndex = this.tokens.currentToken().rhsEndIndex; + if (endIndex == null) { + throw new Error("Expected = token with an end index."); + } + while (this.tokens.currentIndex() < endIndex) { + this.rootTransformer.processToken(); + } + this.tokens.appendCode(`; exports.${varName} = ${varName}`); + } + + /** + * Transform normal declaration exports, including handling destructuring. + * For example, this: + * export const {x: [a = 2, b], c} = d; + * becomes this: + * ({x: [exports.a = 2, exports.b], c: exports.c} = d;) + */ + processComplexExportVar() { + this.tokens.removeInitialToken(); + this.tokens.removeToken(); + const needsParens = this.tokens.matches1(tt.braceL); + if (needsParens) { + this.tokens.appendCode("("); + } + + let depth = 0; + while (true) { + if ( + this.tokens.matches1(tt.braceL) || + this.tokens.matches1(tt.dollarBraceL) || + this.tokens.matches1(tt.bracketL) + ) { + depth++; + this.tokens.copyToken(); + } else if (this.tokens.matches1(tt.braceR) || this.tokens.matches1(tt.bracketR)) { + depth--; + this.tokens.copyToken(); + } else if ( + depth === 0 && + !this.tokens.matches1(tt.name) && + !this.tokens.currentToken().isType + ) { + break; + } else if (this.tokens.matches1(tt.eq)) { + // Default values might have assignments in the RHS that we want to ignore, so skip past + // them. + const endIndex = this.tokens.currentToken().rhsEndIndex; + if (endIndex == null) { + throw new Error("Expected = token with an end index."); + } + while (this.tokens.currentIndex() < endIndex) { + this.rootTransformer.processToken(); + } + } else { + const token = this.tokens.currentToken(); + if (isDeclaration(token)) { + const name = this.tokens.identifierName(); + let replacement = this.importProcessor.getIdentifierReplacement(name); + if (replacement === null) { + throw new Error(`Expected a replacement for ${name} in \`export var\` syntax.`); + } + if (isObjectShorthandDeclaration(token)) { + replacement = `${name}: ${replacement}`; + } + this.tokens.replaceToken(replacement); + } else { + this.rootTransformer.processToken(); + } + } + } + + if (needsParens) { + // Seek to the end of the RHS. + const endIndex = this.tokens.currentToken().rhsEndIndex; + if (endIndex == null) { + throw new Error("Expected = token with an end index."); + } + while (this.tokens.currentIndex() < endIndex) { + this.rootTransformer.processToken(); + } + this.tokens.appendCode(")"); + } + } + + /** + * Transform this: + * export function foo() {} + * into this: + * function foo() {} exports.foo = foo; + */ + processExportFunction() { + this.tokens.replaceToken(""); + const name = this.processNamedFunction(); + this.tokens.appendCode(` exports.${name} = ${name};`); + } + + /** + * Skip past a function with a name and return that name. + */ + processNamedFunction() { + if (this.tokens.matches1(tt._function)) { + this.tokens.copyToken(); + } else if (this.tokens.matches2(tt.name, tt._function)) { + if (!this.tokens.matchesContextual(ContextualKeyword._async)) { + throw new Error("Expected async keyword in function export."); + } + this.tokens.copyToken(); + this.tokens.copyToken(); + } + if (this.tokens.matches1(tt.star)) { + this.tokens.copyToken(); + } + if (!this.tokens.matches1(tt.name)) { + throw new Error("Expected identifier for exported function name."); + } + const name = this.tokens.identifierName(); + this.tokens.copyToken(); + if (this.tokens.currentToken().isType) { + this.tokens.removeInitialToken(); + while (this.tokens.currentToken().isType) { + this.tokens.removeToken(); + } + } + this.tokens.copyExpectedToken(tt.parenL); + this.rootTransformer.processBalancedCode(); + this.tokens.copyExpectedToken(tt.parenR); + this.rootTransformer.processPossibleTypeRange(); + this.tokens.copyExpectedToken(tt.braceL); + this.rootTransformer.processBalancedCode(); + this.tokens.copyExpectedToken(tt.braceR); + return name; + } + + /** + * Transform this: + * export class A {} + * into this: + * class A {} exports.A = A; + */ + processExportClass() { + this.tokens.removeInitialToken(); + this.copyDecorators(); + if (this.tokens.matches1(tt._abstract)) { + this.tokens.removeToken(); + } + const name = this.rootTransformer.processNamedClass(); + this.tokens.appendCode(` exports.${name} = ${name};`); + } + + /** + * Transform this: + * export {a, b as c}; + * into this: + * exports.a = a; exports.c = b; + * + * OR + * + * Transform this: + * export {a, b as c} from './foo'; + * into the pre-generated Object.defineProperty code from the ImportProcessor. + * + * For the first case, if the TypeScript transform is enabled, we need to skip + * exports that are only defined as types. + */ + processExportBindings() { + this.tokens.removeInitialToken(); + this.tokens.removeToken(); + + const isReExport = isExportFrom(this.tokens); + + const exportStatements = []; + while (true) { + if (this.tokens.matches1(tt.braceR)) { + this.tokens.removeToken(); + break; + } + + const specifierInfo = getImportExportSpecifierInfo(this.tokens); + + while (this.tokens.currentIndex() < specifierInfo.endIndex) { + this.tokens.removeToken(); + } + + const shouldRemoveExport = + specifierInfo.isType || + (!isReExport && this.shouldElideExportedIdentifier(specifierInfo.leftName)); + if (!shouldRemoveExport) { + const exportedName = specifierInfo.rightName; + if (exportedName === "default") { + this.hadDefaultExport = true; + } else { + this.hadNamedExport = true; + } + const localName = specifierInfo.leftName; + const newLocalName = this.importProcessor.getIdentifierReplacement(localName); + exportStatements.push(`exports.${exportedName} = ${newLocalName || localName};`); + } + + if (this.tokens.matches1(tt.braceR)) { + this.tokens.removeToken(); + break; + } + if (this.tokens.matches2(tt.comma, tt.braceR)) { + this.tokens.removeToken(); + this.tokens.removeToken(); + break; + } else if (this.tokens.matches1(tt.comma)) { + this.tokens.removeToken(); + } else { + throw new Error(`Unexpected token: ${JSON.stringify(this.tokens.currentToken())}`); + } + } + + if (this.tokens.matchesContextual(ContextualKeyword._from)) { + // This is an export...from, so throw away the normal named export code + // and use the Object.defineProperty code from ImportProcessor. + this.tokens.removeToken(); + const path = this.tokens.stringValue(); + this.tokens.replaceTokenTrimmingLeftWhitespace(this.importProcessor.claimImportCode(path)); + removeMaybeImportAttributes(this.tokens); + } else { + // This is a normal named export, so use that. + this.tokens.appendCode(exportStatements.join(" ")); + } + + if (this.tokens.matches1(tt.semi)) { + this.tokens.removeToken(); + } + } + + processExportStar() { + this.tokens.removeInitialToken(); + while (!this.tokens.matches1(tt.string)) { + this.tokens.removeToken(); + } + const path = this.tokens.stringValue(); + this.tokens.replaceTokenTrimmingLeftWhitespace(this.importProcessor.claimImportCode(path)); + removeMaybeImportAttributes(this.tokens); + if (this.tokens.matches1(tt.semi)) { + this.tokens.removeToken(); + } + } + + shouldElideExportedIdentifier(name) { + return ( + this.isTypeScriptTransformEnabled && + !this.keepUnusedImports && + !this.declarationInfo.valueDeclarations.has(name) + ); + } +} Index: frontend/node_modules/sucrase/dist/esm/transformers/ESMImportTransformer.js =================================================================== --- frontend/node_modules/sucrase/dist/esm/transformers/ESMImportTransformer.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/esm/transformers/ESMImportTransformer.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,415 @@ + + + +import {ContextualKeyword} from "../parser/tokenizer/keywords"; +import {TokenType as tt} from "../parser/tokenizer/types"; + +import elideImportEquals from "../util/elideImportEquals"; +import getDeclarationInfo, { + + EMPTY_DECLARATION_INFO, +} from "../util/getDeclarationInfo"; +import getImportExportSpecifierInfo from "../util/getImportExportSpecifierInfo"; +import {getNonTypeIdentifiers} from "../util/getNonTypeIdentifiers"; +import isExportFrom from "../util/isExportFrom"; +import {removeMaybeImportAttributes} from "../util/removeMaybeImportAttributes"; +import shouldElideDefaultExport from "../util/shouldElideDefaultExport"; + +import Transformer from "./Transformer"; + +/** + * Class for editing import statements when we are keeping the code as ESM. We still need to remove + * type-only imports in TypeScript and Flow. + */ +export default class ESMImportTransformer extends Transformer { + + + + + constructor( + tokens, + nameManager, + helperManager, + reactHotLoaderTransformer, + isTypeScriptTransformEnabled, + isFlowTransformEnabled, + keepUnusedImports, + options, + ) { + super();this.tokens = tokens;this.nameManager = nameManager;this.helperManager = helperManager;this.reactHotLoaderTransformer = reactHotLoaderTransformer;this.isTypeScriptTransformEnabled = isTypeScriptTransformEnabled;this.isFlowTransformEnabled = isFlowTransformEnabled;this.keepUnusedImports = keepUnusedImports;; + this.nonTypeIdentifiers = + isTypeScriptTransformEnabled && !keepUnusedImports + ? getNonTypeIdentifiers(tokens, options) + : new Set(); + this.declarationInfo = + isTypeScriptTransformEnabled && !keepUnusedImports + ? getDeclarationInfo(tokens) + : EMPTY_DECLARATION_INFO; + this.injectCreateRequireForImportRequire = Boolean(options.injectCreateRequireForImportRequire); + } + + process() { + // TypeScript `import foo = require('foo');` should always just be translated to plain require. + if (this.tokens.matches3(tt._import, tt.name, tt.eq)) { + return this.processImportEquals(); + } + if ( + this.tokens.matches4(tt._import, tt.name, tt.name, tt.eq) && + this.tokens.matchesContextualAtIndex(this.tokens.currentIndex() + 1, ContextualKeyword._type) + ) { + // import type T = require('T') + this.tokens.removeInitialToken(); + // This construct is always exactly 8 tokens long, so remove the 7 remaining tokens. + for (let i = 0; i < 7; i++) { + this.tokens.removeToken(); + } + return true; + } + if (this.tokens.matches2(tt._export, tt.eq)) { + this.tokens.replaceToken("module.exports"); + return true; + } + if ( + this.tokens.matches5(tt._export, tt._import, tt.name, tt.name, tt.eq) && + this.tokens.matchesContextualAtIndex(this.tokens.currentIndex() + 2, ContextualKeyword._type) + ) { + // export import type T = require('T') + this.tokens.removeInitialToken(); + // This construct is always exactly 9 tokens long, so remove the 8 remaining tokens. + for (let i = 0; i < 8; i++) { + this.tokens.removeToken(); + } + return true; + } + if (this.tokens.matches1(tt._import)) { + return this.processImport(); + } + if (this.tokens.matches2(tt._export, tt._default)) { + return this.processExportDefault(); + } + if (this.tokens.matches2(tt._export, tt.braceL)) { + return this.processNamedExports(); + } + if ( + this.tokens.matches2(tt._export, tt.name) && + this.tokens.matchesContextualAtIndex(this.tokens.currentIndex() + 1, ContextualKeyword._type) + ) { + // export type {a}; + // export type {a as b}; + // export type {a} from './b'; + // export type * from './b'; + // export type * as ns from './b'; + this.tokens.removeInitialToken(); + this.tokens.removeToken(); + if (this.tokens.matches1(tt.braceL)) { + while (!this.tokens.matches1(tt.braceR)) { + this.tokens.removeToken(); + } + this.tokens.removeToken(); + } else { + // * + this.tokens.removeToken(); + if (this.tokens.matches1(tt._as)) { + // as + this.tokens.removeToken(); + // ns + this.tokens.removeToken(); + } + } + // Remove type re-export `... } from './T'` + if ( + this.tokens.matchesContextual(ContextualKeyword._from) && + this.tokens.matches1AtIndex(this.tokens.currentIndex() + 1, tt.string) + ) { + this.tokens.removeToken(); + this.tokens.removeToken(); + removeMaybeImportAttributes(this.tokens); + } + return true; + } + return false; + } + + processImportEquals() { + const importName = this.tokens.identifierNameAtIndex(this.tokens.currentIndex() + 1); + if (this.shouldAutomaticallyElideImportedName(importName)) { + // If this name is only used as a type, elide the whole import. + elideImportEquals(this.tokens); + } else if (this.injectCreateRequireForImportRequire) { + // We're using require in an environment (Node ESM) that doesn't provide + // it as a global, so generate a helper to import it. + // import -> const + this.tokens.replaceToken("const"); + // Foo + this.tokens.copyToken(); + // = + this.tokens.copyToken(); + // require + this.tokens.replaceToken(this.helperManager.getHelperName("require")); + } else { + // Otherwise, just switch `import` to `const`. + this.tokens.replaceToken("const"); + } + return true; + } + + processImport() { + if (this.tokens.matches2(tt._import, tt.parenL)) { + // Dynamic imports don't need to be transformed. + return false; + } + + const snapshot = this.tokens.snapshot(); + const allImportsRemoved = this.removeImportTypeBindings(); + if (allImportsRemoved) { + this.tokens.restoreToSnapshot(snapshot); + while (!this.tokens.matches1(tt.string)) { + this.tokens.removeToken(); + } + this.tokens.removeToken(); + removeMaybeImportAttributes(this.tokens); + if (this.tokens.matches1(tt.semi)) { + this.tokens.removeToken(); + } + } + return true; + } + + /** + * Remove type bindings from this import, leaving the rest of the import intact. + * + * Return true if this import was ONLY types, and thus is eligible for removal. This will bail out + * of the replacement operation, so we can return early here. + */ + removeImportTypeBindings() { + this.tokens.copyExpectedToken(tt._import); + if ( + this.tokens.matchesContextual(ContextualKeyword._type) && + !this.tokens.matches1AtIndex(this.tokens.currentIndex() + 1, tt.comma) && + !this.tokens.matchesContextualAtIndex(this.tokens.currentIndex() + 1, ContextualKeyword._from) + ) { + // This is an "import type" statement, so exit early. + return true; + } + + if (this.tokens.matches1(tt.string)) { + // This is a bare import, so we should proceed with the import. + this.tokens.copyToken(); + return false; + } + + // Skip the "module" token in import reflection. + if ( + this.tokens.matchesContextual(ContextualKeyword._module) && + this.tokens.matchesContextualAtIndex(this.tokens.currentIndex() + 2, ContextualKeyword._from) + ) { + this.tokens.copyToken(); + } + + let foundNonTypeImport = false; + let foundAnyNamedImport = false; + let needsComma = false; + + // Handle default import. + if (this.tokens.matches1(tt.name)) { + if (this.shouldAutomaticallyElideImportedName(this.tokens.identifierName())) { + this.tokens.removeToken(); + if (this.tokens.matches1(tt.comma)) { + this.tokens.removeToken(); + } + } else { + foundNonTypeImport = true; + this.tokens.copyToken(); + if (this.tokens.matches1(tt.comma)) { + // We're in a statement like: + // import A, * as B from './A'; + // or + // import A, {foo} from './A'; + // where the `A` is being kept. The comma should be removed if an only + // if the next part of the import statement is elided, but that's hard + // to determine at this point in the code. Instead, always remove it + // and set a flag to add it back if necessary. + needsComma = true; + this.tokens.removeToken(); + } + } + } + + if (this.tokens.matches1(tt.star)) { + if (this.shouldAutomaticallyElideImportedName(this.tokens.identifierNameAtRelativeIndex(2))) { + this.tokens.removeToken(); + this.tokens.removeToken(); + this.tokens.removeToken(); + } else { + if (needsComma) { + this.tokens.appendCode(","); + } + foundNonTypeImport = true; + this.tokens.copyExpectedToken(tt.star); + this.tokens.copyExpectedToken(tt.name); + this.tokens.copyExpectedToken(tt.name); + } + } else if (this.tokens.matches1(tt.braceL)) { + if (needsComma) { + this.tokens.appendCode(","); + } + this.tokens.copyToken(); + while (!this.tokens.matches1(tt.braceR)) { + foundAnyNamedImport = true; + const specifierInfo = getImportExportSpecifierInfo(this.tokens); + if ( + specifierInfo.isType || + this.shouldAutomaticallyElideImportedName(specifierInfo.rightName) + ) { + while (this.tokens.currentIndex() < specifierInfo.endIndex) { + this.tokens.removeToken(); + } + if (this.tokens.matches1(tt.comma)) { + this.tokens.removeToken(); + } + } else { + foundNonTypeImport = true; + while (this.tokens.currentIndex() < specifierInfo.endIndex) { + this.tokens.copyToken(); + } + if (this.tokens.matches1(tt.comma)) { + this.tokens.copyToken(); + } + } + } + this.tokens.copyExpectedToken(tt.braceR); + } + + if (this.keepUnusedImports) { + return false; + } + if (this.isTypeScriptTransformEnabled) { + return !foundNonTypeImport; + } else if (this.isFlowTransformEnabled) { + // In Flow, unlike TS, `import {} from 'foo';` preserves the import. + return foundAnyNamedImport && !foundNonTypeImport; + } else { + return false; + } + } + + shouldAutomaticallyElideImportedName(name) { + return ( + this.isTypeScriptTransformEnabled && + !this.keepUnusedImports && + !this.nonTypeIdentifiers.has(name) + ); + } + + processExportDefault() { + if ( + shouldElideDefaultExport( + this.isTypeScriptTransformEnabled, + this.keepUnusedImports, + this.tokens, + this.declarationInfo, + ) + ) { + // If the exported value is just an identifier and should be elided by TypeScript + // rules, then remove it entirely. It will always have the form `export default e`, + // where `e` is an identifier. + this.tokens.removeInitialToken(); + this.tokens.removeToken(); + this.tokens.removeToken(); + return true; + } + + const alreadyHasName = + this.tokens.matches4(tt._export, tt._default, tt._function, tt.name) || + // export default async function + (this.tokens.matches5(tt._export, tt._default, tt.name, tt._function, tt.name) && + this.tokens.matchesContextualAtIndex( + this.tokens.currentIndex() + 2, + ContextualKeyword._async, + )) || + this.tokens.matches4(tt._export, tt._default, tt._class, tt.name) || + this.tokens.matches5(tt._export, tt._default, tt._abstract, tt._class, tt.name); + + if (!alreadyHasName && this.reactHotLoaderTransformer) { + // This is a plain "export default E" statement and we need to assign E to a variable. + // Change "export default E" to "let _default; export default _default = E" + const defaultVarName = this.nameManager.claimFreeName("_default"); + this.tokens.replaceToken(`let ${defaultVarName}; export`); + this.tokens.copyToken(); + this.tokens.appendCode(` ${defaultVarName} =`); + this.reactHotLoaderTransformer.setExtractedDefaultExportName(defaultVarName); + return true; + } + return false; + } + + /** + * Handle a statement with one of these forms: + * export {a, type b}; + * export {c, type d} from 'foo'; + * + * In both cases, any explicit type exports should be removed. In the first + * case, we also need to handle implicit export elision for names declared as + * types. In the second case, we must NOT do implicit named export elision, + * but we must remove the runtime import if all exports are type exports. + */ + processNamedExports() { + if (!this.isTypeScriptTransformEnabled) { + return false; + } + this.tokens.copyExpectedToken(tt._export); + this.tokens.copyExpectedToken(tt.braceL); + + const isReExport = isExportFrom(this.tokens); + let foundNonTypeExport = false; + while (!this.tokens.matches1(tt.braceR)) { + const specifierInfo = getImportExportSpecifierInfo(this.tokens); + if ( + specifierInfo.isType || + (!isReExport && this.shouldElideExportedName(specifierInfo.leftName)) + ) { + // Type export, so remove all tokens, including any comma. + while (this.tokens.currentIndex() < specifierInfo.endIndex) { + this.tokens.removeToken(); + } + if (this.tokens.matches1(tt.comma)) { + this.tokens.removeToken(); + } + } else { + // Non-type export, so copy all tokens, including any comma. + foundNonTypeExport = true; + while (this.tokens.currentIndex() < specifierInfo.endIndex) { + this.tokens.copyToken(); + } + if (this.tokens.matches1(tt.comma)) { + this.tokens.copyToken(); + } + } + } + this.tokens.copyExpectedToken(tt.braceR); + + if (!this.keepUnusedImports && isReExport && !foundNonTypeExport) { + // This is a type-only re-export, so skip evaluating the other module. Technically this + // leaves the statement as `export {}`, but that's ok since that's a no-op. + this.tokens.removeToken(); + this.tokens.removeToken(); + removeMaybeImportAttributes(this.tokens); + } + + return true; + } + + /** + * ESM elides all imports with the rule that we only elide if we see that it's + * a type and never see it as a value. This is in contrast to CJS, which + * elides imports that are completely unknown. + */ + shouldElideExportedName(name) { + return ( + this.isTypeScriptTransformEnabled && + !this.keepUnusedImports && + this.declarationInfo.typeDeclarations.has(name) && + !this.declarationInfo.valueDeclarations.has(name) + ); + } +} Index: frontend/node_modules/sucrase/dist/esm/transformers/FlowTransformer.js =================================================================== --- frontend/node_modules/sucrase/dist/esm/transformers/FlowTransformer.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/esm/transformers/FlowTransformer.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,182 @@ +import {ContextualKeyword} from "../parser/tokenizer/keywords"; +import {TokenType as tt} from "../parser/tokenizer/types"; + + +import Transformer from "./Transformer"; + +export default class FlowTransformer extends Transformer { + constructor( + rootTransformer, + tokens, + isImportsTransformEnabled, + ) { + super();this.rootTransformer = rootTransformer;this.tokens = tokens;this.isImportsTransformEnabled = isImportsTransformEnabled;; + } + + process() { + if ( + this.rootTransformer.processPossibleArrowParamEnd() || + this.rootTransformer.processPossibleAsyncArrowWithTypeParams() || + this.rootTransformer.processPossibleTypeRange() + ) { + return true; + } + if (this.tokens.matches1(tt._enum)) { + this.processEnum(); + return true; + } + if (this.tokens.matches2(tt._export, tt._enum)) { + this.processNamedExportEnum(); + return true; + } + if (this.tokens.matches3(tt._export, tt._default, tt._enum)) { + this.processDefaultExportEnum(); + return true; + } + return false; + } + + /** + * Handle a declaration like: + * export enum E ... + * + * With this imports transform, this becomes: + * const E = [[enum]]; exports.E = E; + * + * otherwise, it becomes: + * export const E = [[enum]]; + */ + processNamedExportEnum() { + if (this.isImportsTransformEnabled) { + // export + this.tokens.removeInitialToken(); + const enumName = this.tokens.identifierNameAtRelativeIndex(1); + this.processEnum(); + this.tokens.appendCode(` exports.${enumName} = ${enumName};`); + } else { + this.tokens.copyToken(); + this.processEnum(); + } + } + + /** + * Handle a declaration like: + * export default enum E + * + * With the imports transform, this becomes: + * const E = [[enum]]; exports.default = E; + * + * otherwise, it becomes: + * const E = [[enum]]; export default E; + */ + processDefaultExportEnum() { + // export + this.tokens.removeInitialToken(); + // default + this.tokens.removeToken(); + const enumName = this.tokens.identifierNameAtRelativeIndex(1); + this.processEnum(); + if (this.isImportsTransformEnabled) { + this.tokens.appendCode(` exports.default = ${enumName};`); + } else { + this.tokens.appendCode(` export default ${enumName};`); + } + } + + /** + * Transpile flow enums to invoke the "flow-enums-runtime" library. + * + * Currently, the transpiled code always uses `require("flow-enums-runtime")`, + * but if future flexibility is needed, we could expose a config option for + * this string (similar to configurable JSX). Even when targeting ESM, the + * default behavior of babel-plugin-transform-flow-enums is to use require + * rather than injecting an import. + * + * Flow enums are quite a bit simpler than TS enums and have some convenient + * constraints: + * - Element initializers must be either always present or always absent. That + * means that we can use fixed lookahead on the first element (if any) and + * assume that all elements are like that. + * - The right-hand side of an element initializer must be a literal value, + * not a complex expression and not referencing other elements. That means + * we can simply copy a single token. + * + * Enums can be broken up into three basic cases: + * + * Mirrored enums: + * enum E {A, B} + * -> + * const E = require("flow-enums-runtime").Mirrored(["A", "B"]); + * + * Initializer enums: + * enum E {A = 1, B = 2} + * -> + * const E = require("flow-enums-runtime")({A: 1, B: 2}); + * + * Symbol enums: + * enum E of symbol {A, B} + * -> + * const E = require("flow-enums-runtime")({A: Symbol("A"), B: Symbol("B")}); + * + * We can statically detect which of the three cases this is by looking at the + * "of" declaration (if any) and seeing if the first element has an initializer. + * Since the other transform details are so similar between the three cases, we + * use a single implementation and vary the transform within processEnumElement + * based on case. + */ + processEnum() { + // enum E -> const E + this.tokens.replaceToken("const"); + this.tokens.copyExpectedToken(tt.name); + + let isSymbolEnum = false; + if (this.tokens.matchesContextual(ContextualKeyword._of)) { + this.tokens.removeToken(); + isSymbolEnum = this.tokens.matchesContextual(ContextualKeyword._symbol); + this.tokens.removeToken(); + } + const hasInitializers = this.tokens.matches3(tt.braceL, tt.name, tt.eq); + this.tokens.appendCode(' = require("flow-enums-runtime")'); + + const isMirrored = !isSymbolEnum && !hasInitializers; + this.tokens.replaceTokenTrimmingLeftWhitespace(isMirrored ? ".Mirrored([" : "({"); + + while (!this.tokens.matches1(tt.braceR)) { + // ... is allowed at the end and has no runtime behavior. + if (this.tokens.matches1(tt.ellipsis)) { + this.tokens.removeToken(); + break; + } + this.processEnumElement(isSymbolEnum, hasInitializers); + if (this.tokens.matches1(tt.comma)) { + this.tokens.copyToken(); + } + } + + this.tokens.replaceToken(isMirrored ? "]);" : "});"); + } + + /** + * Process an individual enum element, producing either an array element or an + * object element based on what type of enum this is. + */ + processEnumElement(isSymbolEnum, hasInitializers) { + if (isSymbolEnum) { + // Symbol enums never have initializers and are expanded to object elements. + // A, -> A: Symbol("A"), + const elementName = this.tokens.identifierName(); + this.tokens.copyToken(); + this.tokens.appendCode(`: Symbol("${elementName}")`); + } else if (hasInitializers) { + // Initializers are expanded to object elements. + // A = 1, -> A: 1, + this.tokens.copyToken(); + this.tokens.replaceTokenTrimmingLeftWhitespace(":"); + this.tokens.copyToken(); + } else { + // Enum elements without initializers become string literal array elements. + // A, -> "A", + this.tokens.replaceToken(`"${this.tokens.identifierName()}"`); + } + } +} Index: frontend/node_modules/sucrase/dist/esm/transformers/JSXTransformer.js =================================================================== --- frontend/node_modules/sucrase/dist/esm/transformers/JSXTransformer.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/esm/transformers/JSXTransformer.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,733 @@ + + + +import XHTMLEntities from "../parser/plugins/jsx/xhtml"; +import {JSXRole} from "../parser/tokenizer"; +import {TokenType as tt} from "../parser/tokenizer/types"; +import {charCodes} from "../parser/util/charcodes"; + +import getJSXPragmaInfo, {} from "../util/getJSXPragmaInfo"; + +import Transformer from "./Transformer"; + +export default class JSXTransformer extends Transformer { + + + + + // State for calculating the line number of each JSX tag in development. + __init() {this.lastLineNumber = 1} + __init2() {this.lastIndex = 0} + + // In development, variable name holding the name of the current file. + __init3() {this.filenameVarName = null} + // Mapping of claimed names for imports in the automatic transform, e,g. + // {jsx: "_jsx"}. This determines which imports to generate in the prefix. + __init4() {this.esmAutomaticImportNameResolutions = {}} + // When automatically adding imports in CJS mode, we store the variable name + // holding the imported CJS module so we can require it in the prefix. + __init5() {this.cjsAutomaticModuleNameResolutions = {}} + + constructor( + rootTransformer, + tokens, + importProcessor, + nameManager, + options, + ) { + super();this.rootTransformer = rootTransformer;this.tokens = tokens;this.importProcessor = importProcessor;this.nameManager = nameManager;this.options = options;JSXTransformer.prototype.__init.call(this);JSXTransformer.prototype.__init2.call(this);JSXTransformer.prototype.__init3.call(this);JSXTransformer.prototype.__init4.call(this);JSXTransformer.prototype.__init5.call(this);; + this.jsxPragmaInfo = getJSXPragmaInfo(options); + this.isAutomaticRuntime = options.jsxRuntime === "automatic"; + this.jsxImportSource = options.jsxImportSource || "react"; + } + + process() { + if (this.tokens.matches1(tt.jsxTagStart)) { + this.processJSXTag(); + return true; + } + return false; + } + + getPrefixCode() { + let prefix = ""; + if (this.filenameVarName) { + prefix += `const ${this.filenameVarName} = ${JSON.stringify(this.options.filePath || "")};`; + } + if (this.isAutomaticRuntime) { + if (this.importProcessor) { + // CJS mode: emit require statements for all modules that were referenced. + for (const [path, resolvedName] of Object.entries(this.cjsAutomaticModuleNameResolutions)) { + prefix += `var ${resolvedName} = require("${path}");`; + } + } else { + // ESM mode: consolidate and emit import statements for referenced names. + const {createElement: createElementResolution, ...otherResolutions} = + this.esmAutomaticImportNameResolutions; + if (createElementResolution) { + prefix += `import {createElement as ${createElementResolution}} from "${this.jsxImportSource}";`; + } + const importSpecifiers = Object.entries(otherResolutions) + .map(([name, resolvedName]) => `${name} as ${resolvedName}`) + .join(", "); + if (importSpecifiers) { + const importPath = + this.jsxImportSource + (this.options.production ? "/jsx-runtime" : "/jsx-dev-runtime"); + prefix += `import {${importSpecifiers}} from "${importPath}";`; + } + } + } + return prefix; + } + + processJSXTag() { + const {jsxRole, start} = this.tokens.currentToken(); + // Calculate line number information at the very start (if in development + // mode) so that the information is guaranteed to be queried in token order. + const elementLocationCode = this.options.production ? null : this.getElementLocationCode(start); + if (this.isAutomaticRuntime && jsxRole !== JSXRole.KeyAfterPropSpread) { + this.transformTagToJSXFunc(elementLocationCode, jsxRole); + } else { + this.transformTagToCreateElement(elementLocationCode); + } + } + + getElementLocationCode(firstTokenStart) { + const lineNumber = this.getLineNumberForIndex(firstTokenStart); + return `lineNumber: ${lineNumber}`; + } + + /** + * Get the line number for this source position. This is calculated lazily and + * must be called in increasing order by index. + */ + getLineNumberForIndex(index) { + const code = this.tokens.code; + while (this.lastIndex < index && this.lastIndex < code.length) { + if (code[this.lastIndex] === "\n") { + this.lastLineNumber++; + } + this.lastIndex++; + } + return this.lastLineNumber; + } + + /** + * Convert the current JSX element to a call to jsx, jsxs, or jsxDEV. This is + * the primary transformation for the automatic transform. + * + * Example: + *
Hello{x}
+ * becomes + * jsxs('div', {a: 1, children: ["Hello", x]}, 2) + */ + transformTagToJSXFunc(elementLocationCode, jsxRole) { + const isStatic = jsxRole === JSXRole.StaticChildren; + // First tag is always jsxTagStart. + this.tokens.replaceToken(this.getJSXFuncInvocationCode(isStatic)); + + let keyCode = null; + if (this.tokens.matches1(tt.jsxTagEnd)) { + // Fragment syntax. + this.tokens.replaceToken(`${this.getFragmentCode()}, {`); + this.processAutomaticChildrenAndEndProps(jsxRole); + } else { + // Normal open tag or self-closing tag. + this.processTagIntro(); + this.tokens.appendCode(", {"); + keyCode = this.processProps(true); + + if (this.tokens.matches2(tt.slash, tt.jsxTagEnd)) { + // Self-closing tag, no children to add, so close the props. + this.tokens.appendCode("}"); + } else if (this.tokens.matches1(tt.jsxTagEnd)) { + // Tag with children. + this.tokens.removeToken(); + this.processAutomaticChildrenAndEndProps(jsxRole); + } else { + throw new Error("Expected either /> or > at the end of the tag."); + } + // If a key was present, move it to its own arg. Note that moving code + // like this will cause line numbers to get out of sync within the JSX + // element if the key expression has a newline in it. This is unfortunate, + // but hopefully should be rare. + if (keyCode) { + this.tokens.appendCode(`, ${keyCode}`); + } + } + if (!this.options.production) { + // If the key wasn't already added, add it now so we can correctly set + // positional args for jsxDEV. + if (keyCode === null) { + this.tokens.appendCode(", void 0"); + } + this.tokens.appendCode(`, ${isStatic}, ${this.getDevSource(elementLocationCode)}, this`); + } + // We're at the close-tag or the end of a self-closing tag, so remove + // everything else and close the function call. + this.tokens.removeInitialToken(); + while (!this.tokens.matches1(tt.jsxTagEnd)) { + this.tokens.removeToken(); + } + this.tokens.replaceToken(")"); + } + + /** + * Convert the current JSX element to a createElement call. In the classic + * runtime, this is the only case. In the automatic runtime, this is called + * as a fallback in some situations. + * + * Example: + *
Hello{x}
+ * becomes + * React.createElement('div', {a: 1, key: 2}, "Hello", x) + */ + transformTagToCreateElement(elementLocationCode) { + // First tag is always jsxTagStart. + this.tokens.replaceToken(this.getCreateElementInvocationCode()); + + if (this.tokens.matches1(tt.jsxTagEnd)) { + // Fragment syntax. + this.tokens.replaceToken(`${this.getFragmentCode()}, null`); + this.processChildren(true); + } else { + // Normal open tag or self-closing tag. + this.processTagIntro(); + this.processPropsObjectWithDevInfo(elementLocationCode); + + if (this.tokens.matches2(tt.slash, tt.jsxTagEnd)) { + // Self-closing tag; no children to process. + } else if (this.tokens.matches1(tt.jsxTagEnd)) { + // Tag with children and a close-tag; process the children as args. + this.tokens.removeToken(); + this.processChildren(true); + } else { + throw new Error("Expected either /> or > at the end of the tag."); + } + } + // We're at the close-tag or the end of a self-closing tag, so remove + // everything else and close the function call. + this.tokens.removeInitialToken(); + while (!this.tokens.matches1(tt.jsxTagEnd)) { + this.tokens.removeToken(); + } + this.tokens.replaceToken(")"); + } + + /** + * Get the code for the relevant function for this context: jsx, jsxs, + * or jsxDEV. The following open-paren is included as well. + * + * These functions are only used for the automatic runtime, so they are always + * auto-imported, but the auto-import will be either CJS or ESM based on the + * target module format. + */ + getJSXFuncInvocationCode(isStatic) { + if (this.options.production) { + if (isStatic) { + return this.claimAutoImportedFuncInvocation("jsxs", "/jsx-runtime"); + } else { + return this.claimAutoImportedFuncInvocation("jsx", "/jsx-runtime"); + } + } else { + return this.claimAutoImportedFuncInvocation("jsxDEV", "/jsx-dev-runtime"); + } + } + + /** + * Return the code to use for the createElement function, e.g. + * `React.createElement`, including the following open-paren. + * + * This is the main function to use for the classic runtime. For the + * automatic runtime, this function is used as a fallback function to + * preserve behavior when there is a prop spread followed by an explicit + * key. In that automatic runtime case, the function should be automatically + * imported. + */ + getCreateElementInvocationCode() { + if (this.isAutomaticRuntime) { + return this.claimAutoImportedFuncInvocation("createElement", ""); + } else { + const {jsxPragmaInfo} = this; + const resolvedPragmaBaseName = this.importProcessor + ? this.importProcessor.getIdentifierReplacement(jsxPragmaInfo.base) || jsxPragmaInfo.base + : jsxPragmaInfo.base; + return `${resolvedPragmaBaseName}${jsxPragmaInfo.suffix}(`; + } + } + + /** + * Return the code to use as the component when compiling a shorthand + * fragment, e.g. `React.Fragment`. + * + * This may be called from either the classic or automatic runtime, and + * the value should be auto-imported for the automatic runtime. + */ + getFragmentCode() { + if (this.isAutomaticRuntime) { + return this.claimAutoImportedName( + "Fragment", + this.options.production ? "/jsx-runtime" : "/jsx-dev-runtime", + ); + } else { + const {jsxPragmaInfo} = this; + const resolvedFragmentPragmaBaseName = this.importProcessor + ? this.importProcessor.getIdentifierReplacement(jsxPragmaInfo.fragmentBase) || + jsxPragmaInfo.fragmentBase + : jsxPragmaInfo.fragmentBase; + return resolvedFragmentPragmaBaseName + jsxPragmaInfo.fragmentSuffix; + } + } + + /** + * Return code that invokes the given function. + * + * When the imports transform is enabled, use the CJSImportTransformer + * strategy of using `.call(void 0, ...` to avoid passing a `this` value in a + * situation that would otherwise look like a method call. + */ + claimAutoImportedFuncInvocation(funcName, importPathSuffix) { + const funcCode = this.claimAutoImportedName(funcName, importPathSuffix); + if (this.importProcessor) { + return `${funcCode}.call(void 0, `; + } else { + return `${funcCode}(`; + } + } + + claimAutoImportedName(funcName, importPathSuffix) { + if (this.importProcessor) { + // CJS mode: claim a name for the module and mark it for import. + const path = this.jsxImportSource + importPathSuffix; + if (!this.cjsAutomaticModuleNameResolutions[path]) { + this.cjsAutomaticModuleNameResolutions[path] = + this.importProcessor.getFreeIdentifierForPath(path); + } + return `${this.cjsAutomaticModuleNameResolutions[path]}.${funcName}`; + } else { + // ESM mode: claim a name for this function and add it to the names that + // should be auto-imported when the prefix is generated. + if (!this.esmAutomaticImportNameResolutions[funcName]) { + this.esmAutomaticImportNameResolutions[funcName] = this.nameManager.claimFreeName( + `_${funcName}`, + ); + } + return this.esmAutomaticImportNameResolutions[funcName]; + } + } + + /** + * Process the first part of a tag, before any props. + */ + processTagIntro() { + // Walk forward until we see one of these patterns: + // jsxName to start the first prop, preceded by another jsxName to end the tag name. + // jsxName to start the first prop, preceded by greaterThan to end the type argument. + // [open brace] to start the first prop. + // [jsxTagEnd] to end the open-tag. + // [slash, jsxTagEnd] to end the self-closing tag. + let introEnd = this.tokens.currentIndex() + 1; + while ( + this.tokens.tokens[introEnd].isType || + (!this.tokens.matches2AtIndex(introEnd - 1, tt.jsxName, tt.jsxName) && + !this.tokens.matches2AtIndex(introEnd - 1, tt.greaterThan, tt.jsxName) && + !this.tokens.matches1AtIndex(introEnd, tt.braceL) && + !this.tokens.matches1AtIndex(introEnd, tt.jsxTagEnd) && + !this.tokens.matches2AtIndex(introEnd, tt.slash, tt.jsxTagEnd)) + ) { + introEnd++; + } + if (introEnd === this.tokens.currentIndex() + 1) { + const tagName = this.tokens.identifierName(); + if (startsWithLowerCase(tagName)) { + this.tokens.replaceToken(`'${tagName}'`); + } + } + while (this.tokens.currentIndex() < introEnd) { + this.rootTransformer.processToken(); + } + } + + /** + * Starting at the beginning of the props, add the props argument to + * React.createElement, including the comma before it. + */ + processPropsObjectWithDevInfo(elementLocationCode) { + const devProps = this.options.production + ? "" + : `__self: this, __source: ${this.getDevSource(elementLocationCode)}`; + if (!this.tokens.matches1(tt.jsxName) && !this.tokens.matches1(tt.braceL)) { + if (devProps) { + this.tokens.appendCode(`, {${devProps}}`); + } else { + this.tokens.appendCode(`, null`); + } + return; + } + this.tokens.appendCode(`, {`); + this.processProps(false); + if (devProps) { + this.tokens.appendCode(` ${devProps}}`); + } else { + this.tokens.appendCode("}"); + } + } + + /** + * Transform the core part of the props, assuming that a { has already been + * inserted before us and that a } will be inserted after us. + * + * If extractKeyCode is true (i.e. when using any jsx... function), any prop + * named "key" has its code captured and returned rather than being emitted to + * the output code. This shifts line numbers, and emitting the code later will + * correct line numbers again. If no key is found or if extractKeyCode is + * false, this function returns null. + */ + processProps(extractKeyCode) { + let keyCode = null; + while (true) { + if (this.tokens.matches2(tt.jsxName, tt.eq)) { + // This is a regular key={value} or key="value" prop. + const propName = this.tokens.identifierName(); + if (extractKeyCode && propName === "key") { + if (keyCode !== null) { + // The props list has multiple keys. Different implementations are + // inconsistent about what to do here: as of this writing, Babel and + // swc keep the *last* key and completely remove the rest, while + // TypeScript uses the *first* key and leaves the others as regular + // props. The React team collaborated with Babel on the + // implementation of this behavior, so presumably the Babel behavior + // is the one to use. + // Since we won't ever be emitting the previous key code, we need to + // at least emit its newlines here so that the line numbers match up + // in the long run. + this.tokens.appendCode(keyCode.replace(/[^\n]/g, "")); + } + // key + this.tokens.removeToken(); + // = + this.tokens.removeToken(); + const snapshot = this.tokens.snapshot(); + this.processPropValue(); + keyCode = this.tokens.dangerouslyGetAndRemoveCodeSinceSnapshot(snapshot); + // Don't add a comma + continue; + } else { + this.processPropName(propName); + this.tokens.replaceToken(": "); + this.processPropValue(); + } + } else if (this.tokens.matches1(tt.jsxName)) { + // This is a shorthand prop like . + const propName = this.tokens.identifierName(); + this.processPropName(propName); + this.tokens.appendCode(": true"); + } else if (this.tokens.matches1(tt.braceL)) { + // This is prop spread, like
, which we can pass + // through fairly directly as an object spread. + this.tokens.replaceToken(""); + this.rootTransformer.processBalancedCode(); + this.tokens.replaceToken(""); + } else { + break; + } + this.tokens.appendCode(","); + } + return keyCode; + } + + processPropName(propName) { + if (propName.includes("-")) { + this.tokens.replaceToken(`'${propName}'`); + } else { + this.tokens.copyToken(); + } + } + + processPropValue() { + if (this.tokens.matches1(tt.braceL)) { + this.tokens.replaceToken(""); + this.rootTransformer.processBalancedCode(); + this.tokens.replaceToken(""); + } else if (this.tokens.matches1(tt.jsxTagStart)) { + this.processJSXTag(); + } else { + this.processStringPropValue(); + } + } + + processStringPropValue() { + const token = this.tokens.currentToken(); + const valueCode = this.tokens.code.slice(token.start + 1, token.end - 1); + const replacementCode = formatJSXTextReplacement(valueCode); + const literalCode = formatJSXStringValueLiteral(valueCode); + this.tokens.replaceToken(literalCode + replacementCode); + } + + /** + * Starting in the middle of the props object literal, produce an additional + * prop for the children and close the object literal. + */ + processAutomaticChildrenAndEndProps(jsxRole) { + if (jsxRole === JSXRole.StaticChildren) { + this.tokens.appendCode(" children: ["); + this.processChildren(false); + this.tokens.appendCode("]}"); + } else { + // The parser information tells us whether we will see a real child or if + // all remaining children (if any) will resolve to empty. If there are no + // non-empty children, don't emit a children prop at all, but still + // process children so that we properly transform the code into nothing. + if (jsxRole === JSXRole.OneChild) { + this.tokens.appendCode(" children: "); + } + this.processChildren(false); + this.tokens.appendCode("}"); + } + } + + /** + * Transform children into a comma-separated list, which will be either + * arguments to createElement or array elements of a children prop. + */ + processChildren(needsInitialComma) { + let needsComma = needsInitialComma; + while (true) { + if (this.tokens.matches2(tt.jsxTagStart, tt.slash)) { + // Closing tag, so no more children. + return; + } + let didEmitElement = false; + if (this.tokens.matches1(tt.braceL)) { + if (this.tokens.matches2(tt.braceL, tt.braceR)) { + // Empty interpolations and comment-only interpolations are allowed + // and don't create an extra child arg. + this.tokens.replaceToken(""); + this.tokens.replaceToken(""); + } else { + // Interpolated expression. + this.tokens.replaceToken(needsComma ? ", " : ""); + this.rootTransformer.processBalancedCode(); + this.tokens.replaceToken(""); + didEmitElement = true; + } + } else if (this.tokens.matches1(tt.jsxTagStart)) { + // Child JSX element + this.tokens.appendCode(needsComma ? ", " : ""); + this.processJSXTag(); + didEmitElement = true; + } else if (this.tokens.matches1(tt.jsxText) || this.tokens.matches1(tt.jsxEmptyText)) { + didEmitElement = this.processChildTextElement(needsComma); + } else { + throw new Error("Unexpected token when processing JSX children."); + } + if (didEmitElement) { + needsComma = true; + } + } + } + + /** + * Turn a JSX text element into a string literal, or nothing at all if the JSX + * text resolves to the empty string. + * + * Returns true if a string literal is emitted, false otherwise. + */ + processChildTextElement(needsComma) { + const token = this.tokens.currentToken(); + const valueCode = this.tokens.code.slice(token.start, token.end); + const replacementCode = formatJSXTextReplacement(valueCode); + const literalCode = formatJSXTextLiteral(valueCode); + if (literalCode === '""') { + this.tokens.replaceToken(replacementCode); + return false; + } else { + this.tokens.replaceToken(`${needsComma ? ", " : ""}${literalCode}${replacementCode}`); + return true; + } + } + + getDevSource(elementLocationCode) { + return `{fileName: ${this.getFilenameVarName()}, ${elementLocationCode}}`; + } + + getFilenameVarName() { + if (!this.filenameVarName) { + this.filenameVarName = this.nameManager.claimFreeName("_jsxFileName"); + } + return this.filenameVarName; + } +} + +/** + * Spec for identifiers: https://tc39.github.io/ecma262/#prod-IdentifierStart. + * + * Really only treat anything starting with a-z as tag names. `_`, `$`, `é` + * should be treated as component names + */ +export function startsWithLowerCase(s) { + const firstChar = s.charCodeAt(0); + return firstChar >= charCodes.lowercaseA && firstChar <= charCodes.lowercaseZ; +} + +/** + * Turn the given jsxText string into a JS string literal. Leading and trailing + * whitespace on lines is removed, except immediately after the open-tag and + * before the close-tag. Empty lines are completely removed, and spaces are + * added between lines after that. + * + * We use JSON.stringify to introduce escape characters as necessary, and trim + * the start and end of each line and remove blank lines. + */ +function formatJSXTextLiteral(text) { + let result = ""; + let whitespace = ""; + + let isInInitialLineWhitespace = false; + let seenNonWhitespace = false; + for (let i = 0; i < text.length; i++) { + const c = text[i]; + if (c === " " || c === "\t" || c === "\r") { + if (!isInInitialLineWhitespace) { + whitespace += c; + } + } else if (c === "\n") { + whitespace = ""; + isInInitialLineWhitespace = true; + } else { + if (seenNonWhitespace && isInInitialLineWhitespace) { + result += " "; + } + result += whitespace; + whitespace = ""; + if (c === "&") { + const {entity, newI} = processEntity(text, i + 1); + i = newI - 1; + result += entity; + } else { + result += c; + } + seenNonWhitespace = true; + isInInitialLineWhitespace = false; + } + } + if (!isInInitialLineWhitespace) { + result += whitespace; + } + return JSON.stringify(result); +} + +/** + * Produce the code that should be printed after the JSX text string literal, + * with most content removed, but all newlines preserved and all spacing at the + * end preserved. + */ +function formatJSXTextReplacement(text) { + let numNewlines = 0; + let numSpaces = 0; + for (const c of text) { + if (c === "\n") { + numNewlines++; + numSpaces = 0; + } else if (c === " ") { + numSpaces++; + } + } + return "\n".repeat(numNewlines) + " ".repeat(numSpaces); +} + +/** + * Format a string in the value position of a JSX prop. + * + * Use the same implementation as convertAttribute from + * babel-helper-builder-react-jsx. + */ +function formatJSXStringValueLiteral(text) { + let result = ""; + for (let i = 0; i < text.length; i++) { + const c = text[i]; + if (c === "\n") { + if (/\s/.test(text[i + 1])) { + result += " "; + while (i < text.length && /\s/.test(text[i + 1])) { + i++; + } + } else { + result += "\n"; + } + } else if (c === "&") { + const {entity, newI} = processEntity(text, i + 1); + result += entity; + i = newI - 1; + } else { + result += c; + } + } + return JSON.stringify(result); +} + +/** + * Starting at a &, see if there's an HTML entity (specified by name, decimal + * char code, or hex char code) and return it if so. + * + * Modified from jsxReadString in babel-parser. + */ +function processEntity(text, indexAfterAmpersand) { + let str = ""; + let count = 0; + let entity; + let i = indexAfterAmpersand; + + if (text[i] === "#") { + let radix = 10; + i++; + let numStart; + if (text[i] === "x") { + radix = 16; + i++; + numStart = i; + while (i < text.length && isHexDigit(text.charCodeAt(i))) { + i++; + } + } else { + numStart = i; + while (i < text.length && isDecimalDigit(text.charCodeAt(i))) { + i++; + } + } + if (text[i] === ";") { + const numStr = text.slice(numStart, i); + if (numStr) { + i++; + entity = String.fromCodePoint(parseInt(numStr, radix)); + } + } + } else { + while (i < text.length && count++ < 10) { + const ch = text[i]; + i++; + if (ch === ";") { + entity = XHTMLEntities.get(str); + break; + } + str += ch; + } + } + + if (!entity) { + return {entity: "&", newI: indexAfterAmpersand}; + } + return {entity, newI: i}; +} + +function isDecimalDigit(code) { + return code >= charCodes.digit0 && code <= charCodes.digit9; +} + +function isHexDigit(code) { + return ( + (code >= charCodes.digit0 && code <= charCodes.digit9) || + (code >= charCodes.lowercaseA && code <= charCodes.lowercaseF) || + (code >= charCodes.uppercaseA && code <= charCodes.uppercaseF) + ); +} Index: frontend/node_modules/sucrase/dist/esm/transformers/JestHoistTransformer.js =================================================================== --- frontend/node_modules/sucrase/dist/esm/transformers/JestHoistTransformer.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/esm/transformers/JestHoistTransformer.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,111 @@ + function _optionalChain(ops) { let lastAccessLHS = undefined; let value = ops[0]; let i = 1; while (i < ops.length) { const op = ops[i]; const fn = ops[i + 1]; i += 2; if ((op === 'optionalAccess' || op === 'optionalCall') && value == null) { return undefined; } if (op === 'access' || op === 'optionalAccess') { lastAccessLHS = value; value = fn(value); } else if (op === 'call' || op === 'optionalCall') { value = fn((...args) => value.call(lastAccessLHS, ...args)); lastAccessLHS = undefined; } } return value; } + +import {TokenType as tt} from "../parser/tokenizer/types"; + + +import Transformer from "./Transformer"; + +const JEST_GLOBAL_NAME = "jest"; +const HOISTED_METHODS = ["mock", "unmock", "enableAutomock", "disableAutomock"]; + +/** + * Implementation of babel-plugin-jest-hoist, which hoists up some jest method + * calls above the imports to allow them to override other imports. + * + * To preserve line numbers, rather than directly moving the jest.mock code, we + * wrap each invocation in a function statement and then call the function from + * the top of the file. + */ +export default class JestHoistTransformer extends Transformer { + __init() {this.hoistedFunctionNames = []} + + constructor( + rootTransformer, + tokens, + nameManager, + importProcessor, + ) { + super();this.rootTransformer = rootTransformer;this.tokens = tokens;this.nameManager = nameManager;this.importProcessor = importProcessor;JestHoistTransformer.prototype.__init.call(this);; + } + + process() { + if ( + this.tokens.currentToken().scopeDepth === 0 && + this.tokens.matches4(tt.name, tt.dot, tt.name, tt.parenL) && + this.tokens.identifierName() === JEST_GLOBAL_NAME + ) { + // TODO: This only works if imports transform is active, which it will be for jest. + // But if jest adds module support and we no longer need the import transform, this needs fixing. + if (_optionalChain([this, 'access', _ => _.importProcessor, 'optionalAccess', _2 => _2.getGlobalNames, 'call', _3 => _3(), 'optionalAccess', _4 => _4.has, 'call', _5 => _5(JEST_GLOBAL_NAME)])) { + return false; + } + return this.extractHoistedCalls(); + } + + return false; + } + + getHoistedCode() { + if (this.hoistedFunctionNames.length > 0) { + // This will be placed before module interop code, but that's fine since + // imports aren't allowed in module mock factories. + return this.hoistedFunctionNames.map((name) => `${name}();`).join(""); + } + return ""; + } + + /** + * Extracts any methods calls on the jest-object that should be hoisted. + * + * According to the jest docs, https://jestjs.io/docs/en/jest-object#jestmockmodulename-factory-options, + * mock, unmock, enableAutomock, disableAutomock, are the methods that should be hoisted. + * + * We do not apply the same checks of the arguments as babel-plugin-jest-hoist does. + */ + extractHoistedCalls() { + // We're handling a chain of calls where `jest` may or may not need to be inserted for each call + // in the chain, so remove the initial `jest` to make the loop implementation cleaner. + this.tokens.removeToken(); + // Track some state so that multiple non-hoisted chained calls in a row keep their chaining + // syntax. + let followsNonHoistedJestCall = false; + + // Iterate through all chained calls on the jest object. + while (this.tokens.matches3(tt.dot, tt.name, tt.parenL)) { + const methodName = this.tokens.identifierNameAtIndex(this.tokens.currentIndex() + 1); + const shouldHoist = HOISTED_METHODS.includes(methodName); + if (shouldHoist) { + // We've matched e.g. `.mock(...)` or similar call. + // Replace the initial `.` with `function __jestHoist(){jest.` + const hoistedFunctionName = this.nameManager.claimFreeName("__jestHoist"); + this.hoistedFunctionNames.push(hoistedFunctionName); + this.tokens.replaceToken(`function ${hoistedFunctionName}(){${JEST_GLOBAL_NAME}.`); + this.tokens.copyToken(); + this.tokens.copyToken(); + this.rootTransformer.processBalancedCode(); + this.tokens.copyExpectedToken(tt.parenR); + this.tokens.appendCode(";}"); + followsNonHoistedJestCall = false; + } else { + // This is a non-hoisted method, so just transform the code as usual. + if (followsNonHoistedJestCall) { + // If we didn't hoist the previous call, we can leave the code as-is to chain off of the + // previous method call. It's important to preserve the code here because we don't know + // for sure that the method actually returned the jest object for chaining. + this.tokens.copyToken(); + } else { + // If we hoisted the previous call, we know it returns the jest object back, so we insert + // the identifier `jest` to continue the chain. + this.tokens.replaceToken(`${JEST_GLOBAL_NAME}.`); + } + this.tokens.copyToken(); + this.tokens.copyToken(); + this.rootTransformer.processBalancedCode(); + this.tokens.copyExpectedToken(tt.parenR); + followsNonHoistedJestCall = true; + } + } + + return true; + } +} Index: frontend/node_modules/sucrase/dist/esm/transformers/NumericSeparatorTransformer.js =================================================================== --- frontend/node_modules/sucrase/dist/esm/transformers/NumericSeparatorTransformer.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/esm/transformers/NumericSeparatorTransformer.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,20 @@ +import {TokenType as tt} from "../parser/tokenizer/types"; + +import Transformer from "./Transformer"; + +export default class NumericSeparatorTransformer extends Transformer { + constructor( tokens) { + super();this.tokens = tokens;; + } + + process() { + if (this.tokens.matches1(tt.num)) { + const code = this.tokens.currentTokenCode(); + if (code.includes("_")) { + this.tokens.replaceToken(code.replace(/_/g, "")); + return true; + } + } + return false; + } +} Index: frontend/node_modules/sucrase/dist/esm/transformers/OptionalCatchBindingTransformer.js =================================================================== --- frontend/node_modules/sucrase/dist/esm/transformers/OptionalCatchBindingTransformer.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/esm/transformers/OptionalCatchBindingTransformer.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,19 @@ + +import {TokenType as tt} from "../parser/tokenizer/types"; + +import Transformer from "./Transformer"; + +export default class OptionalCatchBindingTransformer extends Transformer { + constructor( tokens, nameManager) { + super();this.tokens = tokens;this.nameManager = nameManager;; + } + + process() { + if (this.tokens.matches2(tt._catch, tt.braceL)) { + this.tokens.copyToken(); + this.tokens.appendCode(` (${this.nameManager.claimFreeName("e")})`); + return true; + } + return false; + } +} Index: frontend/node_modules/sucrase/dist/esm/transformers/OptionalChainingNullishTransformer.js =================================================================== --- frontend/node_modules/sucrase/dist/esm/transformers/OptionalChainingNullishTransformer.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/esm/transformers/OptionalChainingNullishTransformer.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,155 @@ + +import {TokenType as tt} from "../parser/tokenizer/types"; + +import Transformer from "./Transformer"; + +/** + * Transformer supporting the optional chaining and nullish coalescing operators. + * + * Tech plan here: + * https://github.com/alangpierce/sucrase/wiki/Sucrase-Optional-Chaining-and-Nullish-Coalescing-Technical-Plan + * + * The prefix and suffix code snippets are handled by TokenProcessor, and this transformer handles + * the operators themselves. + */ +export default class OptionalChainingNullishTransformer extends Transformer { + constructor( tokens, nameManager) { + super();this.tokens = tokens;this.nameManager = nameManager;; + } + + process() { + if (this.tokens.matches1(tt.nullishCoalescing)) { + const token = this.tokens.currentToken(); + if (this.tokens.tokens[token.nullishStartIndex].isAsyncOperation) { + this.tokens.replaceTokenTrimmingLeftWhitespace(", async () => ("); + } else { + this.tokens.replaceTokenTrimmingLeftWhitespace(", () => ("); + } + return true; + } + if (this.tokens.matches1(tt._delete)) { + const nextToken = this.tokens.tokenAtRelativeIndex(1); + if (nextToken.isOptionalChainStart) { + this.tokens.removeInitialToken(); + return true; + } + } + const token = this.tokens.currentToken(); + const chainStart = token.subscriptStartIndex; + if ( + chainStart != null && + this.tokens.tokens[chainStart].isOptionalChainStart && + // Super subscripts can't be optional (since super is never null/undefined), and the syntax + // relies on the subscript being intact, so leave this token alone. + this.tokens.tokenAtRelativeIndex(-1).type !== tt._super + ) { + const param = this.nameManager.claimFreeName("_"); + let arrowStartSnippet; + if ( + chainStart > 0 && + this.tokens.matches1AtIndex(chainStart - 1, tt._delete) && + this.isLastSubscriptInChain() + ) { + // Delete operations are special: we already removed the delete keyword, and to still + // perform a delete, we need to insert a delete in the very last part of the chain, which + // in correct code will always be a property access. + arrowStartSnippet = `${param} => delete ${param}`; + } else { + arrowStartSnippet = `${param} => ${param}`; + } + if (this.tokens.tokens[chainStart].isAsyncOperation) { + arrowStartSnippet = `async ${arrowStartSnippet}`; + } + if ( + this.tokens.matches2(tt.questionDot, tt.parenL) || + this.tokens.matches2(tt.questionDot, tt.lessThan) + ) { + if (this.justSkippedSuper()) { + this.tokens.appendCode(".bind(this)"); + } + this.tokens.replaceTokenTrimmingLeftWhitespace(`, 'optionalCall', ${arrowStartSnippet}`); + } else if (this.tokens.matches2(tt.questionDot, tt.bracketL)) { + this.tokens.replaceTokenTrimmingLeftWhitespace(`, 'optionalAccess', ${arrowStartSnippet}`); + } else if (this.tokens.matches1(tt.questionDot)) { + this.tokens.replaceTokenTrimmingLeftWhitespace(`, 'optionalAccess', ${arrowStartSnippet}.`); + } else if (this.tokens.matches1(tt.dot)) { + this.tokens.replaceTokenTrimmingLeftWhitespace(`, 'access', ${arrowStartSnippet}.`); + } else if (this.tokens.matches1(tt.bracketL)) { + this.tokens.replaceTokenTrimmingLeftWhitespace(`, 'access', ${arrowStartSnippet}[`); + } else if (this.tokens.matches1(tt.parenL)) { + if (this.justSkippedSuper()) { + this.tokens.appendCode(".bind(this)"); + } + this.tokens.replaceTokenTrimmingLeftWhitespace(`, 'call', ${arrowStartSnippet}(`); + } else { + throw new Error("Unexpected subscript operator in optional chain."); + } + return true; + } + return false; + } + + /** + * Determine if the current token is the last of its chain, so that we know whether it's eligible + * to have a delete op inserted. + * + * We can do this by walking forward until we determine one way or another. Each + * isOptionalChainStart token must be paired with exactly one isOptionalChainEnd token after it in + * a nesting way, so we can track depth and walk to the end of the chain (the point where the + * depth goes negative) and see if any other subscript token is after us in the chain. + */ + isLastSubscriptInChain() { + let depth = 0; + for (let i = this.tokens.currentIndex() + 1; ; i++) { + if (i >= this.tokens.tokens.length) { + throw new Error("Reached the end of the code while finding the end of the access chain."); + } + if (this.tokens.tokens[i].isOptionalChainStart) { + depth++; + } else if (this.tokens.tokens[i].isOptionalChainEnd) { + depth--; + } + if (depth < 0) { + return true; + } + + // This subscript token is a later one in the same chain. + if (depth === 0 && this.tokens.tokens[i].subscriptStartIndex != null) { + return false; + } + } + } + + /** + * Determine if we are the open-paren in an expression like super.a()?.b. + * + * We can do this by walking backward to find the previous subscript. If that subscript was + * preceded by a super, then we must be the subscript after it, so if this is a call expression, + * we'll need to attach the right context. + */ + justSkippedSuper() { + let depth = 0; + let index = this.tokens.currentIndex() - 1; + while (true) { + if (index < 0) { + throw new Error( + "Reached the start of the code while finding the start of the access chain.", + ); + } + if (this.tokens.tokens[index].isOptionalChainStart) { + depth--; + } else if (this.tokens.tokens[index].isOptionalChainEnd) { + depth++; + } + if (depth < 0) { + return false; + } + + // This subscript token is a later one in the same chain. + if (depth === 0 && this.tokens.tokens[index].subscriptStartIndex != null) { + return this.tokens.tokens[index - 1].type === tt._super; + } + index--; + } + } +} Index: frontend/node_modules/sucrase/dist/esm/transformers/ReactDisplayNameTransformer.js =================================================================== --- frontend/node_modules/sucrase/dist/esm/transformers/ReactDisplayNameTransformer.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/esm/transformers/ReactDisplayNameTransformer.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,160 @@ + + +import {IdentifierRole} from "../parser/tokenizer"; +import {TokenType as tt} from "../parser/tokenizer/types"; + + +import Transformer from "./Transformer"; + +/** + * Implementation of babel-plugin-transform-react-display-name, which adds a + * display name to usages of React.createClass and createReactClass. + */ +export default class ReactDisplayNameTransformer extends Transformer { + constructor( + rootTransformer, + tokens, + importProcessor, + options, + ) { + super();this.rootTransformer = rootTransformer;this.tokens = tokens;this.importProcessor = importProcessor;this.options = options;; + } + + process() { + const startIndex = this.tokens.currentIndex(); + if (this.tokens.identifierName() === "createReactClass") { + const newName = + this.importProcessor && this.importProcessor.getIdentifierReplacement("createReactClass"); + if (newName) { + this.tokens.replaceToken(`(0, ${newName})`); + } else { + this.tokens.copyToken(); + } + this.tryProcessCreateClassCall(startIndex); + return true; + } + if ( + this.tokens.matches3(tt.name, tt.dot, tt.name) && + this.tokens.identifierName() === "React" && + this.tokens.identifierNameAtIndex(this.tokens.currentIndex() + 2) === "createClass" + ) { + const newName = this.importProcessor + ? this.importProcessor.getIdentifierReplacement("React") || "React" + : "React"; + if (newName) { + this.tokens.replaceToken(newName); + this.tokens.copyToken(); + this.tokens.copyToken(); + } else { + this.tokens.copyToken(); + this.tokens.copyToken(); + this.tokens.copyToken(); + } + this.tryProcessCreateClassCall(startIndex); + return true; + } + return false; + } + + /** + * This is called with the token position at the open-paren. + */ + tryProcessCreateClassCall(startIndex) { + const displayName = this.findDisplayName(startIndex); + if (!displayName) { + return; + } + + if (this.classNeedsDisplayName()) { + this.tokens.copyExpectedToken(tt.parenL); + this.tokens.copyExpectedToken(tt.braceL); + this.tokens.appendCode(`displayName: '${displayName}',`); + this.rootTransformer.processBalancedCode(); + this.tokens.copyExpectedToken(tt.braceR); + this.tokens.copyExpectedToken(tt.parenR); + } + } + + findDisplayName(startIndex) { + if (startIndex < 2) { + return null; + } + if (this.tokens.matches2AtIndex(startIndex - 2, tt.name, tt.eq)) { + // This is an assignment (or declaration) and the LHS is either an identifier or a member + // expression ending in an identifier, so use that identifier name. + return this.tokens.identifierNameAtIndex(startIndex - 2); + } + if ( + startIndex >= 2 && + this.tokens.tokens[startIndex - 2].identifierRole === IdentifierRole.ObjectKey + ) { + // This is an object literal value. + return this.tokens.identifierNameAtIndex(startIndex - 2); + } + if (this.tokens.matches2AtIndex(startIndex - 2, tt._export, tt._default)) { + return this.getDisplayNameFromFilename(); + } + return null; + } + + getDisplayNameFromFilename() { + const filePath = this.options.filePath || "unknown"; + const pathSegments = filePath.split("/"); + const filename = pathSegments[pathSegments.length - 1]; + const dotIndex = filename.lastIndexOf("."); + const baseFilename = dotIndex === -1 ? filename : filename.slice(0, dotIndex); + if (baseFilename === "index" && pathSegments[pathSegments.length - 2]) { + return pathSegments[pathSegments.length - 2]; + } else { + return baseFilename; + } + } + + /** + * We only want to add a display name when this is a function call containing + * one argument, which is an object literal without `displayName` as an + * existing key. + */ + classNeedsDisplayName() { + let index = this.tokens.currentIndex(); + if (!this.tokens.matches2(tt.parenL, tt.braceL)) { + return false; + } + // The block starts on the {, and we expect any displayName key to be in + // that context. We need to ignore other other contexts to avoid matching + // nested displayName keys. + const objectStartIndex = index + 1; + const objectContextId = this.tokens.tokens[objectStartIndex].contextId; + if (objectContextId == null) { + throw new Error("Expected non-null context ID on object open-brace."); + } + + for (; index < this.tokens.tokens.length; index++) { + const token = this.tokens.tokens[index]; + if (token.type === tt.braceR && token.contextId === objectContextId) { + index++; + break; + } + + if ( + this.tokens.identifierNameAtIndex(index) === "displayName" && + this.tokens.tokens[index].identifierRole === IdentifierRole.ObjectKey && + token.contextId === objectContextId + ) { + // We found a displayName key, so bail out. + return false; + } + } + + if (index === this.tokens.tokens.length) { + throw new Error("Unexpected end of input when processing React class."); + } + + // If we got this far, we know we have createClass with an object with no + // display name, so we want to proceed as long as that was the only argument. + return ( + this.tokens.matches1AtIndex(index, tt.parenR) || + this.tokens.matches2AtIndex(index, tt.comma, tt.parenR) + ); + } +} Index: frontend/node_modules/sucrase/dist/esm/transformers/ReactHotLoaderTransformer.js =================================================================== --- frontend/node_modules/sucrase/dist/esm/transformers/ReactHotLoaderTransformer.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/esm/transformers/ReactHotLoaderTransformer.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,69 @@ +import {IdentifierRole, isTopLevelDeclaration} from "../parser/tokenizer"; + +import Transformer from "./Transformer"; + +export default class ReactHotLoaderTransformer extends Transformer { + __init() {this.extractedDefaultExportName = null} + + constructor( tokens, filePath) { + super();this.tokens = tokens;this.filePath = filePath;ReactHotLoaderTransformer.prototype.__init.call(this);; + } + + setExtractedDefaultExportName(extractedDefaultExportName) { + this.extractedDefaultExportName = extractedDefaultExportName; + } + + getPrefixCode() { + return ` + (function () { + var enterModule = require('react-hot-loader').enterModule; + enterModule && enterModule(module); + })();` + .replace(/\s+/g, " ") + .trim(); + } + + getSuffixCode() { + const topLevelNames = new Set(); + for (const token of this.tokens.tokens) { + if ( + !token.isType && + isTopLevelDeclaration(token) && + token.identifierRole !== IdentifierRole.ImportDeclaration + ) { + topLevelNames.add(this.tokens.identifierNameForToken(token)); + } + } + const namesToRegister = Array.from(topLevelNames).map((name) => ({ + variableName: name, + uniqueLocalName: name, + })); + if (this.extractedDefaultExportName) { + namesToRegister.push({ + variableName: this.extractedDefaultExportName, + uniqueLocalName: "default", + }); + } + return ` +;(function () { + var reactHotLoader = require('react-hot-loader').default; + var leaveModule = require('react-hot-loader').leaveModule; + if (!reactHotLoader) { + return; + } +${namesToRegister + .map( + ({variableName, uniqueLocalName}) => + ` reactHotLoader.register(${variableName}, "${uniqueLocalName}", ${JSON.stringify( + this.filePath || "", + )});`, + ) + .join("\n")} + leaveModule(module); +})();`; + } + + process() { + return false; + } +} Index: frontend/node_modules/sucrase/dist/esm/transformers/RootTransformer.js =================================================================== --- frontend/node_modules/sucrase/dist/esm/transformers/RootTransformer.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/esm/transformers/RootTransformer.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,462 @@ + + + +import {ContextualKeyword} from "../parser/tokenizer/keywords"; +import {TokenType as tt} from "../parser/tokenizer/types"; + +import getClassInfo, {} from "../util/getClassInfo"; +import CJSImportTransformer from "./CJSImportTransformer"; +import ESMImportTransformer from "./ESMImportTransformer"; +import FlowTransformer from "./FlowTransformer"; +import JestHoistTransformer from "./JestHoistTransformer"; +import JSXTransformer from "./JSXTransformer"; +import NumericSeparatorTransformer from "./NumericSeparatorTransformer"; +import OptionalCatchBindingTransformer from "./OptionalCatchBindingTransformer"; +import OptionalChainingNullishTransformer from "./OptionalChainingNullishTransformer"; +import ReactDisplayNameTransformer from "./ReactDisplayNameTransformer"; +import ReactHotLoaderTransformer from "./ReactHotLoaderTransformer"; + +import TypeScriptTransformer from "./TypeScriptTransformer"; + + + + + + + + +export default class RootTransformer { + __init() {this.transformers = []} + + + __init2() {this.generatedVariables = []} + + + + + + constructor( + sucraseContext, + transforms, + enableLegacyBabel5ModuleInterop, + options, + ) {;RootTransformer.prototype.__init.call(this);RootTransformer.prototype.__init2.call(this); + this.nameManager = sucraseContext.nameManager; + this.helperManager = sucraseContext.helperManager; + const {tokenProcessor, importProcessor} = sucraseContext; + this.tokens = tokenProcessor; + this.isImportsTransformEnabled = transforms.includes("imports"); + this.isReactHotLoaderTransformEnabled = transforms.includes("react-hot-loader"); + this.disableESTransforms = Boolean(options.disableESTransforms); + + if (!options.disableESTransforms) { + this.transformers.push( + new OptionalChainingNullishTransformer(tokenProcessor, this.nameManager), + ); + this.transformers.push(new NumericSeparatorTransformer(tokenProcessor)); + this.transformers.push(new OptionalCatchBindingTransformer(tokenProcessor, this.nameManager)); + } + + if (transforms.includes("jsx")) { + if (options.jsxRuntime !== "preserve") { + this.transformers.push( + new JSXTransformer(this, tokenProcessor, importProcessor, this.nameManager, options), + ); + } + this.transformers.push( + new ReactDisplayNameTransformer(this, tokenProcessor, importProcessor, options), + ); + } + + let reactHotLoaderTransformer = null; + if (transforms.includes("react-hot-loader")) { + if (!options.filePath) { + throw new Error("filePath is required when using the react-hot-loader transform."); + } + reactHotLoaderTransformer = new ReactHotLoaderTransformer(tokenProcessor, options.filePath); + this.transformers.push(reactHotLoaderTransformer); + } + + // Note that we always want to enable the imports transformer, even when the import transform + // itself isn't enabled, since we need to do type-only import pruning for both Flow and + // TypeScript. + if (transforms.includes("imports")) { + if (importProcessor === null) { + throw new Error("Expected non-null importProcessor with imports transform enabled."); + } + this.transformers.push( + new CJSImportTransformer( + this, + tokenProcessor, + importProcessor, + this.nameManager, + this.helperManager, + reactHotLoaderTransformer, + enableLegacyBabel5ModuleInterop, + Boolean(options.enableLegacyTypeScriptModuleInterop), + transforms.includes("typescript"), + transforms.includes("flow"), + Boolean(options.preserveDynamicImport), + Boolean(options.keepUnusedImports), + ), + ); + } else { + this.transformers.push( + new ESMImportTransformer( + tokenProcessor, + this.nameManager, + this.helperManager, + reactHotLoaderTransformer, + transforms.includes("typescript"), + transforms.includes("flow"), + Boolean(options.keepUnusedImports), + options, + ), + ); + } + + if (transforms.includes("flow")) { + this.transformers.push( + new FlowTransformer(this, tokenProcessor, transforms.includes("imports")), + ); + } + if (transforms.includes("typescript")) { + this.transformers.push( + new TypeScriptTransformer(this, tokenProcessor, transforms.includes("imports")), + ); + } + if (transforms.includes("jest")) { + this.transformers.push( + new JestHoistTransformer(this, tokenProcessor, this.nameManager, importProcessor), + ); + } + } + + transform() { + this.tokens.reset(); + this.processBalancedCode(); + const shouldAddUseStrict = this.isImportsTransformEnabled; + // "use strict" always needs to be first, so override the normal transformer order. + let prefix = shouldAddUseStrict ? '"use strict";' : ""; + for (const transformer of this.transformers) { + prefix += transformer.getPrefixCode(); + } + prefix += this.helperManager.emitHelpers(); + prefix += this.generatedVariables.map((v) => ` var ${v};`).join(""); + for (const transformer of this.transformers) { + prefix += transformer.getHoistedCode(); + } + let suffix = ""; + for (const transformer of this.transformers) { + suffix += transformer.getSuffixCode(); + } + const result = this.tokens.finish(); + let {code} = result; + if (code.startsWith("#!")) { + let newlineIndex = code.indexOf("\n"); + if (newlineIndex === -1) { + newlineIndex = code.length; + code += "\n"; + } + return { + code: code.slice(0, newlineIndex + 1) + prefix + code.slice(newlineIndex + 1) + suffix, + // The hashbang line has no tokens, so shifting the tokens to account + // for prefix can happen normally. + mappings: this.shiftMappings(result.mappings, prefix.length), + }; + } else { + return { + code: prefix + code + suffix, + mappings: this.shiftMappings(result.mappings, prefix.length), + }; + } + } + + processBalancedCode() { + let braceDepth = 0; + let parenDepth = 0; + while (!this.tokens.isAtEnd()) { + if (this.tokens.matches1(tt.braceL) || this.tokens.matches1(tt.dollarBraceL)) { + braceDepth++; + } else if (this.tokens.matches1(tt.braceR)) { + if (braceDepth === 0) { + return; + } + braceDepth--; + } + if (this.tokens.matches1(tt.parenL)) { + parenDepth++; + } else if (this.tokens.matches1(tt.parenR)) { + if (parenDepth === 0) { + return; + } + parenDepth--; + } + this.processToken(); + } + } + + processToken() { + if (this.tokens.matches1(tt._class)) { + this.processClass(); + return; + } + for (const transformer of this.transformers) { + const wasProcessed = transformer.process(); + if (wasProcessed) { + return; + } + } + this.tokens.copyToken(); + } + + /** + * Skip past a class with a name and return that name. + */ + processNamedClass() { + if (!this.tokens.matches2(tt._class, tt.name)) { + throw new Error("Expected identifier for exported class name."); + } + const name = this.tokens.identifierNameAtIndex(this.tokens.currentIndex() + 1); + this.processClass(); + return name; + } + + processClass() { + const classInfo = getClassInfo(this, this.tokens, this.nameManager, this.disableESTransforms); + + // Both static and instance initializers need a class name to use to invoke the initializer, so + // assign to one if necessary. + const needsCommaExpression = + (classInfo.headerInfo.isExpression || !classInfo.headerInfo.className) && + classInfo.staticInitializerNames.length + classInfo.instanceInitializerNames.length > 0; + + let className = classInfo.headerInfo.className; + if (needsCommaExpression) { + className = this.nameManager.claimFreeName("_class"); + this.generatedVariables.push(className); + this.tokens.appendCode(` (${className} =`); + } + + const classToken = this.tokens.currentToken(); + const contextId = classToken.contextId; + if (contextId == null) { + throw new Error("Expected class to have a context ID."); + } + this.tokens.copyExpectedToken(tt._class); + while (!this.tokens.matchesContextIdAndLabel(tt.braceL, contextId)) { + this.processToken(); + } + + this.processClassBody(classInfo, className); + + const staticInitializerStatements = classInfo.staticInitializerNames.map( + (name) => `${className}.${name}()`, + ); + if (needsCommaExpression) { + this.tokens.appendCode( + `, ${staticInitializerStatements.map((s) => `${s}, `).join("")}${className})`, + ); + } else if (classInfo.staticInitializerNames.length > 0) { + this.tokens.appendCode(` ${staticInitializerStatements.map((s) => `${s};`).join(" ")}`); + } + } + + /** + * We want to just handle class fields in all contexts, since TypeScript supports them. Later, + * when some JS implementations support class fields, this should be made optional. + */ + processClassBody(classInfo, className) { + const { + headerInfo, + constructorInsertPos, + constructorInitializerStatements, + fields, + instanceInitializerNames, + rangesToRemove, + } = classInfo; + let fieldIndex = 0; + let rangeToRemoveIndex = 0; + const classContextId = this.tokens.currentToken().contextId; + if (classContextId == null) { + throw new Error("Expected non-null context ID on class."); + } + this.tokens.copyExpectedToken(tt.braceL); + if (this.isReactHotLoaderTransformEnabled) { + this.tokens.appendCode( + "__reactstandin__regenerateByEval(key, code) {this[key] = eval(code);}", + ); + } + + const needsConstructorInit = + constructorInitializerStatements.length + instanceInitializerNames.length > 0; + + if (constructorInsertPos === null && needsConstructorInit) { + const constructorInitializersCode = this.makeConstructorInitCode( + constructorInitializerStatements, + instanceInitializerNames, + className, + ); + if (headerInfo.hasSuperclass) { + const argsName = this.nameManager.claimFreeName("args"); + this.tokens.appendCode( + `constructor(...${argsName}) { super(...${argsName}); ${constructorInitializersCode}; }`, + ); + } else { + this.tokens.appendCode(`constructor() { ${constructorInitializersCode}; }`); + } + } + + while (!this.tokens.matchesContextIdAndLabel(tt.braceR, classContextId)) { + if (fieldIndex < fields.length && this.tokens.currentIndex() === fields[fieldIndex].start) { + let needsCloseBrace = false; + if (this.tokens.matches1(tt.bracketL)) { + this.tokens.copyTokenWithPrefix(`${fields[fieldIndex].initializerName}() {this`); + } else if (this.tokens.matches1(tt.string) || this.tokens.matches1(tt.num)) { + this.tokens.copyTokenWithPrefix(`${fields[fieldIndex].initializerName}() {this[`); + needsCloseBrace = true; + } else { + this.tokens.copyTokenWithPrefix(`${fields[fieldIndex].initializerName}() {this.`); + } + while (this.tokens.currentIndex() < fields[fieldIndex].end) { + if (needsCloseBrace && this.tokens.currentIndex() === fields[fieldIndex].equalsIndex) { + this.tokens.appendCode("]"); + } + this.processToken(); + } + this.tokens.appendCode("}"); + fieldIndex++; + } else if ( + rangeToRemoveIndex < rangesToRemove.length && + this.tokens.currentIndex() >= rangesToRemove[rangeToRemoveIndex].start + ) { + if (this.tokens.currentIndex() < rangesToRemove[rangeToRemoveIndex].end) { + this.tokens.removeInitialToken(); + } + while (this.tokens.currentIndex() < rangesToRemove[rangeToRemoveIndex].end) { + this.tokens.removeToken(); + } + rangeToRemoveIndex++; + } else if (this.tokens.currentIndex() === constructorInsertPos) { + this.tokens.copyToken(); + if (needsConstructorInit) { + this.tokens.appendCode( + `;${this.makeConstructorInitCode( + constructorInitializerStatements, + instanceInitializerNames, + className, + )};`, + ); + } + this.processToken(); + } else { + this.processToken(); + } + } + this.tokens.copyExpectedToken(tt.braceR); + } + + makeConstructorInitCode( + constructorInitializerStatements, + instanceInitializerNames, + className, + ) { + return [ + ...constructorInitializerStatements, + ...instanceInitializerNames.map((name) => `${className}.prototype.${name}.call(this)`), + ].join(";"); + } + + /** + * Normally it's ok to simply remove type tokens, but we need to be more careful when dealing with + * arrow function return types since they can confuse the parser. In that case, we want to move + * the close-paren to the same line as the arrow. + * + * See https://github.com/alangpierce/sucrase/issues/391 for more details. + */ + processPossibleArrowParamEnd() { + if (this.tokens.matches2(tt.parenR, tt.colon) && this.tokens.tokenAtRelativeIndex(1).isType) { + let nextNonTypeIndex = this.tokens.currentIndex() + 1; + // Look ahead to see if this is an arrow function or something else. + while (this.tokens.tokens[nextNonTypeIndex].isType) { + nextNonTypeIndex++; + } + if (this.tokens.matches1AtIndex(nextNonTypeIndex, tt.arrow)) { + this.tokens.removeInitialToken(); + while (this.tokens.currentIndex() < nextNonTypeIndex) { + this.tokens.removeToken(); + } + this.tokens.replaceTokenTrimmingLeftWhitespace(") =>"); + return true; + } + } + return false; + } + + /** + * An async arrow function might be of the form: + * + * async < + * T + * >() => {} + * + * in which case, removing the type parameters will cause a syntax error. Detect this case and + * move the open-paren earlier. + */ + processPossibleAsyncArrowWithTypeParams() { + if ( + !this.tokens.matchesContextual(ContextualKeyword._async) && + !this.tokens.matches1(tt._async) + ) { + return false; + } + const nextToken = this.tokens.tokenAtRelativeIndex(1); + if (nextToken.type !== tt.lessThan || !nextToken.isType) { + return false; + } + + let nextNonTypeIndex = this.tokens.currentIndex() + 1; + // Look ahead to see if this is an arrow function or something else. + while (this.tokens.tokens[nextNonTypeIndex].isType) { + nextNonTypeIndex++; + } + if (this.tokens.matches1AtIndex(nextNonTypeIndex, tt.parenL)) { + this.tokens.replaceToken("async ("); + this.tokens.removeInitialToken(); + while (this.tokens.currentIndex() < nextNonTypeIndex) { + this.tokens.removeToken(); + } + this.tokens.removeToken(); + // We ate a ( token, so we need to process the tokens in between and then the ) token so that + // we remain balanced. + this.processBalancedCode(); + this.processToken(); + return true; + } + return false; + } + + processPossibleTypeRange() { + if (this.tokens.currentToken().isType) { + this.tokens.removeInitialToken(); + while (this.tokens.currentToken().isType) { + this.tokens.removeToken(); + } + return true; + } + return false; + } + + shiftMappings( + mappings, + prefixLength, + ) { + for (let i = 0; i < mappings.length; i++) { + const mapping = mappings[i]; + if (mapping !== undefined) { + mappings[i] = mapping + prefixLength; + } + } + return mappings; + } +} Index: frontend/node_modules/sucrase/dist/esm/transformers/Transformer.js =================================================================== --- frontend/node_modules/sucrase/dist/esm/transformers/Transformer.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/esm/transformers/Transformer.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,16 @@ +export default class Transformer { + // Return true if anything was processed, false otherwise. + + + getPrefixCode() { + return ""; + } + + getHoistedCode() { + return ""; + } + + getSuffixCode() { + return ""; + } +} Index: frontend/node_modules/sucrase/dist/esm/transformers/TypeScriptTransformer.js =================================================================== --- frontend/node_modules/sucrase/dist/esm/transformers/TypeScriptTransformer.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/esm/transformers/TypeScriptTransformer.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,279 @@ + +import {TokenType as tt} from "../parser/tokenizer/types"; + +import isIdentifier from "../util/isIdentifier"; + +import Transformer from "./Transformer"; + +export default class TypeScriptTransformer extends Transformer { + constructor( + rootTransformer, + tokens, + isImportsTransformEnabled, + ) { + super();this.rootTransformer = rootTransformer;this.tokens = tokens;this.isImportsTransformEnabled = isImportsTransformEnabled;; + } + + process() { + if ( + this.rootTransformer.processPossibleArrowParamEnd() || + this.rootTransformer.processPossibleAsyncArrowWithTypeParams() || + this.rootTransformer.processPossibleTypeRange() + ) { + return true; + } + if ( + this.tokens.matches1(tt._public) || + this.tokens.matches1(tt._protected) || + this.tokens.matches1(tt._private) || + this.tokens.matches1(tt._abstract) || + this.tokens.matches1(tt._readonly) || + this.tokens.matches1(tt._override) || + this.tokens.matches1(tt.nonNullAssertion) + ) { + this.tokens.removeInitialToken(); + return true; + } + if (this.tokens.matches1(tt._enum) || this.tokens.matches2(tt._const, tt._enum)) { + this.processEnum(); + return true; + } + if ( + this.tokens.matches2(tt._export, tt._enum) || + this.tokens.matches3(tt._export, tt._const, tt._enum) + ) { + this.processEnum(true); + return true; + } + return false; + } + + processEnum(isExport = false) { + // We might have "export const enum", so just remove all relevant tokens. + this.tokens.removeInitialToken(); + while (this.tokens.matches1(tt._const) || this.tokens.matches1(tt._enum)) { + this.tokens.removeToken(); + } + const enumName = this.tokens.identifierName(); + this.tokens.removeToken(); + if (isExport && !this.isImportsTransformEnabled) { + this.tokens.appendCode("export "); + } + this.tokens.appendCode(`var ${enumName}; (function (${enumName})`); + this.tokens.copyExpectedToken(tt.braceL); + this.processEnumBody(enumName); + this.tokens.copyExpectedToken(tt.braceR); + if (isExport && this.isImportsTransformEnabled) { + this.tokens.appendCode(`)(${enumName} || (exports.${enumName} = ${enumName} = {}));`); + } else { + this.tokens.appendCode(`)(${enumName} || (${enumName} = {}));`); + } + } + + /** + * Transform an enum into equivalent JS. This has complexity in a few places: + * - TS allows string enums, numeric enums, and a mix of the two styles within an enum. + * - Enum keys are allowed to be referenced in later enum values. + * - Enum keys are allowed to be strings. + * - When enum values are omitted, they should follow an auto-increment behavior. + */ + processEnumBody(enumName) { + // Code that can be used to reference the previous enum member, or null if this is the first + // enum member. + let previousValueCode = null; + while (true) { + if (this.tokens.matches1(tt.braceR)) { + break; + } + const {nameStringCode, variableName} = this.extractEnumKeyInfo(this.tokens.currentToken()); + this.tokens.removeInitialToken(); + + if ( + this.tokens.matches3(tt.eq, tt.string, tt.comma) || + this.tokens.matches3(tt.eq, tt.string, tt.braceR) + ) { + this.processStringLiteralEnumMember(enumName, nameStringCode, variableName); + } else if (this.tokens.matches1(tt.eq)) { + this.processExplicitValueEnumMember(enumName, nameStringCode, variableName); + } else { + this.processImplicitValueEnumMember( + enumName, + nameStringCode, + variableName, + previousValueCode, + ); + } + if (this.tokens.matches1(tt.comma)) { + this.tokens.removeToken(); + } + + if (variableName != null) { + previousValueCode = variableName; + } else { + previousValueCode = `${enumName}[${nameStringCode}]`; + } + } + } + + /** + * Detect name information about this enum key, which will be used to determine which code to emit + * and whether we should declare a variable as part of this declaration. + * + * Some cases to keep in mind: + * - Enum keys can be implicitly referenced later, e.g. `X = 1, Y = X`. In Sucrase, we implement + * this by declaring a variable `X` so that later expressions can use it. + * - In addition to the usual identifier key syntax, enum keys are allowed to be string literals, + * e.g. `"hello world" = 3,`. Template literal syntax is NOT allowed. + * - Even if the enum key is defined as a string literal, it may still be referenced by identifier + * later, e.g. `"X" = 1, Y = X`. That means that we need to detect whether or not a string + * literal is identifier-like and emit a variable if so, even if the declaration did not use an + * identifier. + * - Reserved keywords like `break` are valid enum keys, but are not valid to be referenced later + * and would be a syntax error if we emitted a variable, so we need to skip the variable + * declaration in those cases. + * + * The variableName return value captures these nuances: if non-null, we can and must emit a + * variable declaration, and if null, we can't and shouldn't. + */ + extractEnumKeyInfo(nameToken) { + if (nameToken.type === tt.name) { + const name = this.tokens.identifierNameForToken(nameToken); + return { + nameStringCode: `"${name}"`, + variableName: isIdentifier(name) ? name : null, + }; + } else if (nameToken.type === tt.string) { + const name = this.tokens.stringValueForToken(nameToken); + return { + nameStringCode: this.tokens.code.slice(nameToken.start, nameToken.end), + variableName: isIdentifier(name) ? name : null, + }; + } else { + throw new Error("Expected name or string at beginning of enum element."); + } + } + + /** + * Handle an enum member where the RHS is just a string literal (not omitted, not a number, and + * not a complex expression). This is the typical form for TS string enums, and in this case, we + * do *not* create a reverse mapping. + * + * This is called after deleting the key token, when the token processor is at the equals sign. + * + * Example 1: + * someKey = "some value" + * -> + * const someKey = "some value"; MyEnum["someKey"] = someKey; + * + * Example 2: + * "some key" = "some value" + * -> + * MyEnum["some key"] = "some value"; + */ + processStringLiteralEnumMember( + enumName, + nameStringCode, + variableName, + ) { + if (variableName != null) { + this.tokens.appendCode(`const ${variableName}`); + // = + this.tokens.copyToken(); + // value string + this.tokens.copyToken(); + this.tokens.appendCode(`; ${enumName}[${nameStringCode}] = ${variableName};`); + } else { + this.tokens.appendCode(`${enumName}[${nameStringCode}]`); + // = + this.tokens.copyToken(); + // value string + this.tokens.copyToken(); + this.tokens.appendCode(";"); + } + } + + /** + * Handle an enum member initialized with an expression on the right-hand side (other than a + * string literal). In these cases, we should transform the expression and emit code that sets up + * a reverse mapping. + * + * The TypeScript implementation of this operation distinguishes between expressions that can be + * "constant folded" at compile time (i.e. consist of number literals and simple math operations + * on those numbers) and ones that are dynamic. For constant expressions, it emits the resolved + * numeric value, and auto-incrementing is only allowed in that case. Evaluating expressions at + * compile time would add significant complexity to Sucrase, so Sucrase instead leaves the + * expression as-is, and will later emit something like `MyEnum["previousKey"] + 1` to implement + * auto-incrementing. + * + * This is called after deleting the key token, when the token processor is at the equals sign. + * + * Example 1: + * someKey = 1 + 1 + * -> + * const someKey = 1 + 1; MyEnum[MyEnum["someKey"] = someKey] = "someKey"; + * + * Example 2: + * "some key" = 1 + 1 + * -> + * MyEnum[MyEnum["some key"] = 1 + 1] = "some key"; + */ + processExplicitValueEnumMember( + enumName, + nameStringCode, + variableName, + ) { + const rhsEndIndex = this.tokens.currentToken().rhsEndIndex; + if (rhsEndIndex == null) { + throw new Error("Expected rhsEndIndex on enum assign."); + } + + if (variableName != null) { + this.tokens.appendCode(`const ${variableName}`); + this.tokens.copyToken(); + while (this.tokens.currentIndex() < rhsEndIndex) { + this.rootTransformer.processToken(); + } + this.tokens.appendCode( + `; ${enumName}[${enumName}[${nameStringCode}] = ${variableName}] = ${nameStringCode};`, + ); + } else { + this.tokens.appendCode(`${enumName}[${enumName}[${nameStringCode}]`); + this.tokens.copyToken(); + while (this.tokens.currentIndex() < rhsEndIndex) { + this.rootTransformer.processToken(); + } + this.tokens.appendCode(`] = ${nameStringCode};`); + } + } + + /** + * Handle an enum member with no right-hand side expression. In this case, the value is the + * previous value plus 1, or 0 if there was no previous value. We should also always emit a + * reverse mapping. + * + * Example 1: + * someKey2 + * -> + * const someKey2 = someKey1 + 1; MyEnum[MyEnum["someKey2"] = someKey2] = "someKey2"; + * + * Example 2: + * "some key 2" + * -> + * MyEnum[MyEnum["some key 2"] = someKey1 + 1] = "some key 2"; + */ + processImplicitValueEnumMember( + enumName, + nameStringCode, + variableName, + previousValueCode, + ) { + let valueCode = previousValueCode != null ? `${previousValueCode} + 1` : "0"; + if (variableName != null) { + this.tokens.appendCode(`const ${variableName} = ${valueCode}; `); + valueCode = variableName; + } + this.tokens.appendCode( + `${enumName}[${enumName}[${nameStringCode}] = ${valueCode}] = ${nameStringCode};`, + ); + } +} Index: frontend/node_modules/sucrase/dist/esm/util/elideImportEquals.js =================================================================== --- frontend/node_modules/sucrase/dist/esm/util/elideImportEquals.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/esm/util/elideImportEquals.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,29 @@ +import {TokenType as tt} from "../parser/tokenizer/types"; + + +export default function elideImportEquals(tokens) { + // import + tokens.removeInitialToken(); + // name + tokens.removeToken(); + // = + tokens.removeToken(); + // name or require + tokens.removeToken(); + // Handle either `import A = require('A')` or `import A = B.C.D`. + if (tokens.matches1(tt.parenL)) { + // ( + tokens.removeToken(); + // path string + tokens.removeToken(); + // ) + tokens.removeToken(); + } else { + while (tokens.matches1(tt.dot)) { + // . + tokens.removeToken(); + // name + tokens.removeToken(); + } + } +} Index: frontend/node_modules/sucrase/dist/esm/util/formatTokens.js =================================================================== --- frontend/node_modules/sucrase/dist/esm/util/formatTokens.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/esm/util/formatTokens.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,74 @@ +import LinesAndColumns from "lines-and-columns"; + + +import {formatTokenType} from "../parser/tokenizer/types"; + +export default function formatTokens(code, tokens) { + if (tokens.length === 0) { + return ""; + } + + const tokenKeys = Object.keys(tokens[0]).filter( + (k) => k !== "type" && k !== "value" && k !== "start" && k !== "end" && k !== "loc", + ); + const typeKeys = Object.keys(tokens[0].type).filter((k) => k !== "label" && k !== "keyword"); + + const headings = ["Location", "Label", "Raw", ...tokenKeys, ...typeKeys]; + + const lines = new LinesAndColumns(code); + const rows = [headings, ...tokens.map(getTokenComponents)]; + const padding = headings.map(() => 0); + for (const components of rows) { + for (let i = 0; i < components.length; i++) { + padding[i] = Math.max(padding[i], components[i].length); + } + } + return rows + .map((components) => components.map((component, i) => component.padEnd(padding[i])).join(" ")) + .join("\n"); + + function getTokenComponents(token) { + const raw = code.slice(token.start, token.end); + return [ + formatRange(token.start, token.end), + formatTokenType(token.type), + truncate(String(raw), 14), + // @ts-ignore: Intentional dynamic access by key. + ...tokenKeys.map((key) => formatValue(token[key], key)), + // @ts-ignore: Intentional dynamic access by key. + ...typeKeys.map((key) => formatValue(token.type[key], key)), + ]; + } + + // eslint-disable-next-line @typescript-eslint/no-explicit-any + function formatValue(value, key) { + if (value === true) { + return key; + } else if (value === false || value === null) { + return ""; + } else { + return String(value); + } + } + + function formatRange(start, end) { + return `${formatPos(start)}-${formatPos(end)}`; + } + + function formatPos(pos) { + const location = lines.locationForIndex(pos); + if (!location) { + return "Unknown"; + } else { + return `${location.line + 1}:${location.column + 1}`; + } + } +} + +function truncate(s, length) { + if (s.length > length) { + return `${s.slice(0, length - 3)}...`; + } else { + return s; + } +} Index: frontend/node_modules/sucrase/dist/esm/util/getClassInfo.js =================================================================== --- frontend/node_modules/sucrase/dist/esm/util/getClassInfo.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/esm/util/getClassInfo.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,352 @@ + + +import {ContextualKeyword} from "../parser/tokenizer/keywords"; +import {TokenType as tt} from "../parser/tokenizer/types"; + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +/** + * Get information about the class fields for this class, given a token processor pointing to the + * open-brace at the start of the class. + */ +export default function getClassInfo( + rootTransformer, + tokens, + nameManager, + disableESTransforms, +) { + const snapshot = tokens.snapshot(); + + const headerInfo = processClassHeader(tokens); + + let constructorInitializerStatements = []; + const instanceInitializerNames = []; + const staticInitializerNames = []; + let constructorInsertPos = null; + const fields = []; + const rangesToRemove = []; + + const classContextId = tokens.currentToken().contextId; + if (classContextId == null) { + throw new Error("Expected non-null class context ID on class open-brace."); + } + + tokens.nextToken(); + while (!tokens.matchesContextIdAndLabel(tt.braceR, classContextId)) { + if (tokens.matchesContextual(ContextualKeyword._constructor) && !tokens.currentToken().isType) { + ({constructorInitializerStatements, constructorInsertPos} = processConstructor(tokens)); + } else if (tokens.matches1(tt.semi)) { + if (!disableESTransforms) { + rangesToRemove.push({start: tokens.currentIndex(), end: tokens.currentIndex() + 1}); + } + tokens.nextToken(); + } else if (tokens.currentToken().isType) { + tokens.nextToken(); + } else { + // Either a method or a field. Skip to the identifier part. + const statementStartIndex = tokens.currentIndex(); + let isStatic = false; + let isESPrivate = false; + let isDeclareOrAbstract = false; + while (isAccessModifier(tokens.currentToken())) { + if (tokens.matches1(tt._static)) { + isStatic = true; + } + if (tokens.matches1(tt.hash)) { + isESPrivate = true; + } + if (tokens.matches1(tt._declare) || tokens.matches1(tt._abstract)) { + isDeclareOrAbstract = true; + } + tokens.nextToken(); + } + if (isStatic && tokens.matches1(tt.braceL)) { + // This is a static block, so don't process it in any special way. + skipToNextClassElement(tokens, classContextId); + continue; + } + if (isESPrivate) { + // Sucrase doesn't attempt to transpile private fields; just leave them as-is. + skipToNextClassElement(tokens, classContextId); + continue; + } + if ( + tokens.matchesContextual(ContextualKeyword._constructor) && + !tokens.currentToken().isType + ) { + ({constructorInitializerStatements, constructorInsertPos} = processConstructor(tokens)); + continue; + } + + const nameStartIndex = tokens.currentIndex(); + skipFieldName(tokens); + if (tokens.matches1(tt.lessThan) || tokens.matches1(tt.parenL)) { + // This is a method, so nothing to process. + skipToNextClassElement(tokens, classContextId); + continue; + } + // There might be a type annotation that we need to skip. + while (tokens.currentToken().isType) { + tokens.nextToken(); + } + if (tokens.matches1(tt.eq)) { + const equalsIndex = tokens.currentIndex(); + // This is an initializer, so we need to wrap in an initializer method. + const valueEnd = tokens.currentToken().rhsEndIndex; + if (valueEnd == null) { + throw new Error("Expected rhsEndIndex on class field assignment."); + } + tokens.nextToken(); + while (tokens.currentIndex() < valueEnd) { + rootTransformer.processToken(); + } + let initializerName; + if (isStatic) { + initializerName = nameManager.claimFreeName("__initStatic"); + staticInitializerNames.push(initializerName); + } else { + initializerName = nameManager.claimFreeName("__init"); + instanceInitializerNames.push(initializerName); + } + // Fields start at the name, so `static x = 1;` has a field range of `x = 1;`. + fields.push({ + initializerName, + equalsIndex, + start: nameStartIndex, + end: tokens.currentIndex(), + }); + } else if (!disableESTransforms || isDeclareOrAbstract) { + // This is a regular field declaration, like `x;`. With the class transform enabled, we just + // remove the line so that no output is produced. With the class transform disabled, we + // usually want to preserve the declaration (but still strip types), but if the `declare` + // or `abstract` keyword is specified, we should remove the line to avoid initializing the + // value to undefined. + rangesToRemove.push({start: statementStartIndex, end: tokens.currentIndex()}); + } + } + } + + tokens.restoreToSnapshot(snapshot); + if (disableESTransforms) { + // With ES transforms disabled, we don't want to transform regular class + // field declarations, and we don't need to do any additional tricks to + // reference the constructor for static init, but we still need to transform + // TypeScript field initializers defined as constructor parameters and we + // still need to remove `declare` fields. For now, we run the same code + // path but omit any field information, as if the class had no field + // declarations. In the future, when we fully drop the class fields + // transform, we can simplify this code significantly. + return { + headerInfo, + constructorInitializerStatements, + instanceInitializerNames: [], + staticInitializerNames: [], + constructorInsertPos, + fields: [], + rangesToRemove, + }; + } else { + return { + headerInfo, + constructorInitializerStatements, + instanceInitializerNames, + staticInitializerNames, + constructorInsertPos, + fields, + rangesToRemove, + }; + } +} + +/** + * Move the token processor to the next method/field in the class. + * + * To do that, we seek forward to the next start of a class name (either an open + * bracket or an identifier, or the closing curly brace), then seek backward to + * include any access modifiers. + */ +function skipToNextClassElement(tokens, classContextId) { + tokens.nextToken(); + while (tokens.currentToken().contextId !== classContextId) { + tokens.nextToken(); + } + while (isAccessModifier(tokens.tokenAtRelativeIndex(-1))) { + tokens.previousToken(); + } +} + +function processClassHeader(tokens) { + const classToken = tokens.currentToken(); + const contextId = classToken.contextId; + if (contextId == null) { + throw new Error("Expected context ID on class token."); + } + const isExpression = classToken.isExpression; + if (isExpression == null) { + throw new Error("Expected isExpression on class token."); + } + let className = null; + let hasSuperclass = false; + tokens.nextToken(); + if (tokens.matches1(tt.name)) { + className = tokens.identifierName(); + } + while (!tokens.matchesContextIdAndLabel(tt.braceL, contextId)) { + // If this has a superclass, there will always be an `extends` token. If it doesn't have a + // superclass, only type parameters and `implements` clauses can show up here, all of which + // consist only of type tokens. A declaration like `class A {` should *not* count + // as having a superclass. + if (tokens.matches1(tt._extends) && !tokens.currentToken().isType) { + hasSuperclass = true; + } + tokens.nextToken(); + } + return {isExpression, className, hasSuperclass}; +} + +/** + * Extract useful information out of a constructor, starting at the "constructor" name. + */ +function processConstructor(tokens) + + + { + const constructorInitializerStatements = []; + + tokens.nextToken(); + const constructorContextId = tokens.currentToken().contextId; + if (constructorContextId == null) { + throw new Error("Expected context ID on open-paren starting constructor params."); + } + // Advance through parameters looking for access modifiers. + while (!tokens.matchesContextIdAndLabel(tt.parenR, constructorContextId)) { + if (tokens.currentToken().contextId === constructorContextId) { + // Current token is an open paren or comma just before a param, so check + // that param for access modifiers. + tokens.nextToken(); + if (isAccessModifier(tokens.currentToken())) { + tokens.nextToken(); + while (isAccessModifier(tokens.currentToken())) { + tokens.nextToken(); + } + const token = tokens.currentToken(); + if (token.type !== tt.name) { + throw new Error("Expected identifier after access modifiers in constructor arg."); + } + const name = tokens.identifierNameForToken(token); + constructorInitializerStatements.push(`this.${name} = ${name}`); + } + } else { + tokens.nextToken(); + } + } + // ) + tokens.nextToken(); + // Constructor type annotations are invalid, but skip them anyway since + // they're easy to skip. + while (tokens.currentToken().isType) { + tokens.nextToken(); + } + let constructorInsertPos = tokens.currentIndex(); + + // Advance through body looking for a super call. + let foundSuperCall = false; + while (!tokens.matchesContextIdAndLabel(tt.braceR, constructorContextId)) { + if (!foundSuperCall && tokens.matches2(tt._super, tt.parenL)) { + tokens.nextToken(); + const superCallContextId = tokens.currentToken().contextId; + if (superCallContextId == null) { + throw new Error("Expected a context ID on the super call"); + } + while (!tokens.matchesContextIdAndLabel(tt.parenR, superCallContextId)) { + tokens.nextToken(); + } + constructorInsertPos = tokens.currentIndex(); + foundSuperCall = true; + } + tokens.nextToken(); + } + // } + tokens.nextToken(); + + return {constructorInitializerStatements, constructorInsertPos}; +} + +/** + * Determine if this is any token that can go before the name in a method/field. + */ +function isAccessModifier(token) { + return [ + tt._async, + tt._get, + tt._set, + tt.plus, + tt.minus, + tt._readonly, + tt._static, + tt._public, + tt._private, + tt._protected, + tt._override, + tt._abstract, + tt.star, + tt._declare, + tt.hash, + ].includes(token.type); +} + +/** + * The next token or set of tokens is either an identifier or an expression in square brackets, for + * a method or field name. + */ +function skipFieldName(tokens) { + if (tokens.matches1(tt.bracketL)) { + const startToken = tokens.currentToken(); + const classContextId = startToken.contextId; + if (classContextId == null) { + throw new Error("Expected class context ID on computed name open bracket."); + } + while (!tokens.matchesContextIdAndLabel(tt.bracketR, classContextId)) { + tokens.nextToken(); + } + tokens.nextToken(); + } else { + tokens.nextToken(); + } +} Index: frontend/node_modules/sucrase/dist/esm/util/getDeclarationInfo.js =================================================================== --- frontend/node_modules/sucrase/dist/esm/util/getDeclarationInfo.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/esm/util/getDeclarationInfo.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,40 @@ +import {isTopLevelDeclaration} from "../parser/tokenizer"; +import {TokenType as tt} from "../parser/tokenizer/types"; + + + + + + + +export const EMPTY_DECLARATION_INFO = { + typeDeclarations: new Set(), + valueDeclarations: new Set(), +}; + +/** + * Get all top-level identifiers that should be preserved when exported in TypeScript. + * + * Examples: + * - If an identifier is declared as `const x`, then `export {x}` should be preserved. + * - If it's declared as `type x`, then `export {x}` should be removed. + * - If it's declared as both `const x` and `type x`, then the export should be preserved. + * - Classes and enums should be preserved (even though they also introduce types). + * - Imported identifiers should be preserved since we don't have enough information to + * rule them out. --isolatedModules disallows re-exports, which catches errors here. + */ +export default function getDeclarationInfo(tokens) { + const typeDeclarations = new Set(); + const valueDeclarations = new Set(); + for (let i = 0; i < tokens.tokens.length; i++) { + const token = tokens.tokens[i]; + if (token.type === tt.name && isTopLevelDeclaration(token)) { + if (token.isType) { + typeDeclarations.add(tokens.identifierNameForToken(token)); + } else { + valueDeclarations.add(tokens.identifierNameForToken(token)); + } + } + } + return {typeDeclarations, valueDeclarations}; +} Index: frontend/node_modules/sucrase/dist/esm/util/getIdentifierNames.js =================================================================== --- frontend/node_modules/sucrase/dist/esm/util/getIdentifierNames.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/esm/util/getIdentifierNames.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,15 @@ + +import {TokenType as tt} from "../parser/tokenizer/types"; + +/** + * Get all identifier names in the code, in order, including duplicates. + */ +export default function getIdentifierNames(code, tokens) { + const names = []; + for (const token of tokens) { + if (token.type === tt.name) { + names.push(code.slice(token.start, token.end)); + } + } + return names; +} Index: frontend/node_modules/sucrase/dist/esm/util/getImportExportSpecifierInfo.js =================================================================== --- frontend/node_modules/sucrase/dist/esm/util/getImportExportSpecifierInfo.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/esm/util/getImportExportSpecifierInfo.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,92 @@ +import {TokenType as tt} from "../parser/tokenizer/types"; + + + + + + + + + + + + + + + + +/** + * Determine information about this named import or named export specifier. + * + * This syntax is the `a` from statements like these: + * import {A} from "./foo"; + * export {A}; + * export {A} from "./foo"; + * + * As it turns out, we can exactly characterize the syntax meaning by simply + * counting the number of tokens, which can be from 1 to 4: + * {A} + * {type A} + * {A as B} + * {type A as B} + * + * In the type case, we never actually need the names in practice, so don't get + * them. + * + * TODO: There's some redundancy with the type detection here and the isType + * flag that's already present on tokens in TS mode. This function could + * potentially be simplified and/or pushed to the call sites to avoid the object + * allocation. + */ +export default function getImportExportSpecifierInfo( + tokens, + index = tokens.currentIndex(), +) { + let endIndex = index + 1; + if (isSpecifierEnd(tokens, endIndex)) { + // import {A} + const name = tokens.identifierNameAtIndex(index); + return { + isType: false, + leftName: name, + rightName: name, + endIndex, + }; + } + endIndex++; + if (isSpecifierEnd(tokens, endIndex)) { + // import {type A} + return { + isType: true, + leftName: null, + rightName: null, + endIndex, + }; + } + endIndex++; + if (isSpecifierEnd(tokens, endIndex)) { + // import {A as B} + return { + isType: false, + leftName: tokens.identifierNameAtIndex(index), + rightName: tokens.identifierNameAtIndex(index + 2), + endIndex, + }; + } + endIndex++; + if (isSpecifierEnd(tokens, endIndex)) { + // import {type A as B} + return { + isType: true, + leftName: null, + rightName: null, + endIndex, + }; + } + throw new Error(`Unexpected import/export specifier at ${index}`); +} + +function isSpecifierEnd(tokens, index) { + const token = tokens.tokens[index]; + return token.type === tt.braceR || token.type === tt.comma; +} Index: frontend/node_modules/sucrase/dist/esm/util/getJSXPragmaInfo.js =================================================================== --- frontend/node_modules/sucrase/dist/esm/util/getJSXPragmaInfo.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/esm/util/getJSXPragmaInfo.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,22 @@ + + + + + + + + + +export default function getJSXPragmaInfo(options) { + const [base, suffix] = splitPragma(options.jsxPragma || "React.createElement"); + const [fragmentBase, fragmentSuffix] = splitPragma(options.jsxFragmentPragma || "React.Fragment"); + return {base, suffix, fragmentBase, fragmentSuffix}; +} + +function splitPragma(pragma) { + let dotIndex = pragma.indexOf("."); + if (dotIndex === -1) { + dotIndex = pragma.length; + } + return [pragma.slice(0, dotIndex), pragma.slice(dotIndex)]; +} Index: frontend/node_modules/sucrase/dist/esm/util/getNonTypeIdentifiers.js =================================================================== --- frontend/node_modules/sucrase/dist/esm/util/getNonTypeIdentifiers.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/esm/util/getNonTypeIdentifiers.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,43 @@ + +import {IdentifierRole} from "../parser/tokenizer"; +import {TokenType, TokenType as tt} from "../parser/tokenizer/types"; + +import {startsWithLowerCase} from "../transformers/JSXTransformer"; +import getJSXPragmaInfo from "./getJSXPragmaInfo"; + +export function getNonTypeIdentifiers(tokens, options) { + const jsxPragmaInfo = getJSXPragmaInfo(options); + const nonTypeIdentifiers = new Set(); + for (let i = 0; i < tokens.tokens.length; i++) { + const token = tokens.tokens[i]; + if ( + token.type === tt.name && + !token.isType && + (token.identifierRole === IdentifierRole.Access || + token.identifierRole === IdentifierRole.ObjectShorthand || + token.identifierRole === IdentifierRole.ExportAccess) && + !token.shadowsGlobal + ) { + nonTypeIdentifiers.add(tokens.identifierNameForToken(token)); + } + if (token.type === tt.jsxTagStart) { + nonTypeIdentifiers.add(jsxPragmaInfo.base); + } + if ( + token.type === tt.jsxTagStart && + i + 1 < tokens.tokens.length && + tokens.tokens[i + 1].type === tt.jsxTagEnd + ) { + nonTypeIdentifiers.add(jsxPragmaInfo.base); + nonTypeIdentifiers.add(jsxPragmaInfo.fragmentBase); + } + if (token.type === tt.jsxName && token.identifierRole === IdentifierRole.Access) { + const identifierName = tokens.identifierNameForToken(token); + // Lower-case single-component tag names like "div" don't count. + if (!startsWithLowerCase(identifierName) || tokens.tokens[i + 1].type === TokenType.dot) { + nonTypeIdentifiers.add(tokens.identifierNameForToken(token)); + } + } + } + return nonTypeIdentifiers; +} Index: frontend/node_modules/sucrase/dist/esm/util/getTSImportedNames.js =================================================================== --- frontend/node_modules/sucrase/dist/esm/util/getTSImportedNames.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/esm/util/getTSImportedNames.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,84 @@ +import {TokenType as tt} from "../parser/tokenizer/types"; + +import getImportExportSpecifierInfo from "./getImportExportSpecifierInfo"; + +/** + * Special case code to scan for imported names in ESM TypeScript. We need to do this so we can + * properly get globals so we can compute shadowed globals. + * + * This is similar to logic in CJSImportProcessor, but trimmed down to avoid logic with CJS + * replacement and flow type imports. + */ +export default function getTSImportedNames(tokens) { + const importedNames = new Set(); + for (let i = 0; i < tokens.tokens.length; i++) { + if ( + tokens.matches1AtIndex(i, tt._import) && + !tokens.matches3AtIndex(i, tt._import, tt.name, tt.eq) + ) { + collectNamesForImport(tokens, i, importedNames); + } + } + return importedNames; +} + +function collectNamesForImport( + tokens, + index, + importedNames, +) { + index++; + + if (tokens.matches1AtIndex(index, tt.parenL)) { + // Dynamic import, so nothing to do + return; + } + + if (tokens.matches1AtIndex(index, tt.name)) { + importedNames.add(tokens.identifierNameAtIndex(index)); + index++; + if (tokens.matches1AtIndex(index, tt.comma)) { + index++; + } + } + + if (tokens.matches1AtIndex(index, tt.star)) { + // * as + index += 2; + importedNames.add(tokens.identifierNameAtIndex(index)); + index++; + } + + if (tokens.matches1AtIndex(index, tt.braceL)) { + index++; + collectNamesForNamedImport(tokens, index, importedNames); + } +} + +function collectNamesForNamedImport( + tokens, + index, + importedNames, +) { + while (true) { + if (tokens.matches1AtIndex(index, tt.braceR)) { + return; + } + + const specifierInfo = getImportExportSpecifierInfo(tokens, index); + index = specifierInfo.endIndex; + if (!specifierInfo.isType) { + importedNames.add(specifierInfo.rightName); + } + + if (tokens.matches2AtIndex(index, tt.comma, tt.braceR)) { + return; + } else if (tokens.matches1AtIndex(index, tt.braceR)) { + return; + } else if (tokens.matches1AtIndex(index, tt.comma)) { + index++; + } else { + throw new Error(`Unexpected token: ${JSON.stringify(tokens.tokens[index])}`); + } + } +} Index: frontend/node_modules/sucrase/dist/esm/util/isAsyncOperation.js =================================================================== --- frontend/node_modules/sucrase/dist/esm/util/isAsyncOperation.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/esm/util/isAsyncOperation.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,38 @@ +import {ContextualKeyword} from "../parser/tokenizer/keywords"; + + +/** + * Determine whether this optional chain or nullish coalescing operation has any await statements in + * it. If so, we'll need to transpile to an async operation. + * + * We compute this by walking the length of the operation and returning true if we see an await + * keyword used as a real await (rather than an object key or property access). Nested optional + * chain/nullish operations need to be tracked but don't silence await, but a nested async function + * (or any other nested scope) will make the await not count. + */ +export default function isAsyncOperation(tokens) { + let index = tokens.currentIndex(); + let depth = 0; + const startToken = tokens.currentToken(); + do { + const token = tokens.tokens[index]; + if (token.isOptionalChainStart) { + depth++; + } + if (token.isOptionalChainEnd) { + depth--; + } + depth += token.numNullishCoalesceStarts; + depth -= token.numNullishCoalesceEnds; + + if ( + token.contextualKeyword === ContextualKeyword._await && + token.identifierRole == null && + token.scopeDepth === startToken.scopeDepth + ) { + return true; + } + index += 1; + } while (depth > 0 && index < tokens.tokens.length); + return false; +} Index: frontend/node_modules/sucrase/dist/esm/util/isExportFrom.js =================================================================== --- frontend/node_modules/sucrase/dist/esm/util/isExportFrom.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/esm/util/isExportFrom.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,18 @@ +import {ContextualKeyword} from "../parser/tokenizer/keywords"; +import {TokenType as tt} from "../parser/tokenizer/types"; + + +/** + * Starting at `export {`, look ahead and return `true` if this is an + * `export {...} from` statement and `false` if this is a plain multi-export. + */ +export default function isExportFrom(tokens) { + let closeBraceIndex = tokens.currentIndex(); + while (!tokens.matches1AtIndex(closeBraceIndex, tt.braceR)) { + closeBraceIndex++; + } + return ( + tokens.matchesContextualAtIndex(closeBraceIndex + 1, ContextualKeyword._from) && + tokens.matches1AtIndex(closeBraceIndex + 2, tt.string) + ); +} Index: frontend/node_modules/sucrase/dist/esm/util/isIdentifier.js =================================================================== --- frontend/node_modules/sucrase/dist/esm/util/isIdentifier.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/esm/util/isIdentifier.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,81 @@ +import {IS_IDENTIFIER_CHAR, IS_IDENTIFIER_START} from "../parser/util/identifier"; + +// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Lexical_grammar +// Hard-code a list of reserved words rather than trying to use keywords or contextual keywords +// from the parser, since currently there are various exceptions, like `package` being reserved +// but unused and various contextual keywords being reserved. Note that we assume that all code +// compiled by Sucrase is in a module, so strict mode words and await are all considered reserved +// here. +const RESERVED_WORDS = new Set([ + // Reserved keywords as of ECMAScript 2015 + "break", + "case", + "catch", + "class", + "const", + "continue", + "debugger", + "default", + "delete", + "do", + "else", + "export", + "extends", + "finally", + "for", + "function", + "if", + "import", + "in", + "instanceof", + "new", + "return", + "super", + "switch", + "this", + "throw", + "try", + "typeof", + "var", + "void", + "while", + "with", + "yield", + // Future reserved keywords + "enum", + "implements", + "interface", + "let", + "package", + "private", + "protected", + "public", + "static", + "await", + // Literals that cannot be used as identifiers + "false", + "null", + "true", +]); + +/** + * Determine if the given name is a legal variable name. + * + * This is needed when transforming TypeScript enums; if an enum key is a valid + * variable name, it might be referenced later in the enum, so we need to + * declare a variable. + */ +export default function isIdentifier(name) { + if (name.length === 0) { + return false; + } + if (!IS_IDENTIFIER_START[name.charCodeAt(0)]) { + return false; + } + for (let i = 1; i < name.length; i++) { + if (!IS_IDENTIFIER_CHAR[name.charCodeAt(i)]) { + return false; + } + } + return !RESERVED_WORDS.has(name); +} Index: frontend/node_modules/sucrase/dist/esm/util/removeMaybeImportAttributes.js =================================================================== --- frontend/node_modules/sucrase/dist/esm/util/removeMaybeImportAttributes.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/esm/util/removeMaybeImportAttributes.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,22 @@ +import {ContextualKeyword} from "../parser/tokenizer/keywords"; +import {TokenType as tt} from "../parser/tokenizer/types"; + + +/** + * Starting at a potential `with` or (legacy) `assert` token, remove the import + * attributes if they exist. + */ +export function removeMaybeImportAttributes(tokens) { + if ( + tokens.matches2(tt._with, tt.braceL) || + (tokens.matches2(tt.name, tt.braceL) && tokens.matchesContextual(ContextualKeyword._assert)) + ) { + // assert + tokens.removeToken(); + // { + tokens.removeToken(); + tokens.removeBalancedCode(); + // } + tokens.removeToken(); + } +} Index: frontend/node_modules/sucrase/dist/esm/util/shouldElideDefaultExport.js =================================================================== --- frontend/node_modules/sucrase/dist/esm/util/shouldElideDefaultExport.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/esm/util/shouldElideDefaultExport.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,38 @@ +import {TokenType as tt} from "../parser/tokenizer/types"; + + + +/** + * Common method sharing code between CJS and ESM cases, since they're the same here. + */ +export default function shouldElideDefaultExport( + isTypeScriptTransformEnabled, + keepUnusedImports, + tokens, + declarationInfo, +) { + if (!isTypeScriptTransformEnabled || keepUnusedImports) { + return false; + } + const exportToken = tokens.currentToken(); + if (exportToken.rhsEndIndex == null) { + throw new Error("Expected non-null rhsEndIndex on export token."); + } + // The export must be of the form `export default a` or `export default a;`. + const numTokens = exportToken.rhsEndIndex - tokens.currentIndex(); + if ( + numTokens !== 3 && + !(numTokens === 4 && tokens.matches1AtIndex(exportToken.rhsEndIndex - 1, tt.semi)) + ) { + return false; + } + const identifierToken = tokens.tokenAtRelativeIndex(2); + if (identifierToken.type !== tt.name) { + return false; + } + const exportedName = tokens.identifierNameForToken(identifierToken); + return ( + declarationInfo.typeDeclarations.has(exportedName) && + !declarationInfo.valueDeclarations.has(exportedName) + ); +} Index: frontend/node_modules/sucrase/dist/identifyShadowedGlobals.js =================================================================== --- frontend/node_modules/sucrase/dist/identifyShadowedGlobals.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/identifyShadowedGlobals.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,98 @@ +"use strict";Object.defineProperty(exports, "__esModule", {value: true}); + + + +var _tokenizer = require('./parser/tokenizer'); + +var _types = require('./parser/tokenizer/types'); + + +/** + * Traverse the given tokens and modify them if necessary to indicate that some names shadow global + * variables. + */ + function identifyShadowedGlobals( + tokens, + scopes, + globalNames, +) { + if (!hasShadowedGlobals(tokens, globalNames)) { + return; + } + markShadowedGlobals(tokens, scopes, globalNames); +} exports.default = identifyShadowedGlobals; + +/** + * We can do a fast up-front check to see if there are any declarations to global names. If not, + * then there's no point in computing scope assignments. + */ +// Exported for testing. + function hasShadowedGlobals(tokens, globalNames) { + for (const token of tokens.tokens) { + if ( + token.type === _types.TokenType.name && + !token.isType && + _tokenizer.isNonTopLevelDeclaration.call(void 0, token) && + globalNames.has(tokens.identifierNameForToken(token)) + ) { + return true; + } + } + return false; +} exports.hasShadowedGlobals = hasShadowedGlobals; + +function markShadowedGlobals( + tokens, + scopes, + globalNames, +) { + const scopeStack = []; + let scopeIndex = scopes.length - 1; + // Scopes were generated at completion time, so they're sorted by end index, so we can maintain a + // good stack by going backwards through them. + for (let i = tokens.tokens.length - 1; ; i--) { + while (scopeStack.length > 0 && scopeStack[scopeStack.length - 1].startTokenIndex === i + 1) { + scopeStack.pop(); + } + while (scopeIndex >= 0 && scopes[scopeIndex].endTokenIndex === i + 1) { + scopeStack.push(scopes[scopeIndex]); + scopeIndex--; + } + // Process scopes after the last iteration so we can make sure we pop all of them. + if (i < 0) { + break; + } + + const token = tokens.tokens[i]; + const name = tokens.identifierNameForToken(token); + if (scopeStack.length > 1 && !token.isType && token.type === _types.TokenType.name && globalNames.has(name)) { + if (_tokenizer.isBlockScopedDeclaration.call(void 0, token)) { + markShadowedForScope(scopeStack[scopeStack.length - 1], tokens, name); + } else if (_tokenizer.isFunctionScopedDeclaration.call(void 0, token)) { + let stackIndex = scopeStack.length - 1; + while (stackIndex > 0 && !scopeStack[stackIndex].isFunctionScope) { + stackIndex--; + } + if (stackIndex < 0) { + throw new Error("Did not find parent function scope."); + } + markShadowedForScope(scopeStack[stackIndex], tokens, name); + } + } + } + if (scopeStack.length > 0) { + throw new Error("Expected empty scope stack after processing file."); + } +} + +function markShadowedForScope(scope, tokens, name) { + for (let i = scope.startTokenIndex; i < scope.endTokenIndex; i++) { + const token = tokens.tokens[i]; + if ( + (token.type === _types.TokenType.name || token.type === _types.TokenType.jsxName) && + tokens.identifierNameForToken(token) === name + ) { + token.shadowsGlobal = true; + } + } +} Index: frontend/node_modules/sucrase/dist/index.js =================================================================== --- frontend/node_modules/sucrase/dist/index.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/index.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,133 @@ +"use strict";Object.defineProperty(exports, "__esModule", {value: true}); function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }var _CJSImportProcessor = require('./CJSImportProcessor'); var _CJSImportProcessor2 = _interopRequireDefault(_CJSImportProcessor); +var _computeSourceMap = require('./computeSourceMap'); var _computeSourceMap2 = _interopRequireDefault(_computeSourceMap); +var _HelperManager = require('./HelperManager'); +var _identifyShadowedGlobals = require('./identifyShadowedGlobals'); var _identifyShadowedGlobals2 = _interopRequireDefault(_identifyShadowedGlobals); +var _NameManager = require('./NameManager'); var _NameManager2 = _interopRequireDefault(_NameManager); +var _Options = require('./Options'); + +var _parser = require('./parser'); + +var _TokenProcessor = require('./TokenProcessor'); var _TokenProcessor2 = _interopRequireDefault(_TokenProcessor); +var _RootTransformer = require('./transformers/RootTransformer'); var _RootTransformer2 = _interopRequireDefault(_RootTransformer); +var _formatTokens = require('./util/formatTokens'); var _formatTokens2 = _interopRequireDefault(_formatTokens); +var _getTSImportedNames = require('./util/getTSImportedNames'); var _getTSImportedNames2 = _interopRequireDefault(_getTSImportedNames); + + + + + + + + + + + + + + +; + + function getVersion() { + /* istanbul ignore next */ + return "3.35.1"; +} exports.getVersion = getVersion; + + function transform(code, options) { + _Options.validateOptions.call(void 0, options); + try { + const sucraseContext = getSucraseContext(code, options); + const transformer = new (0, _RootTransformer2.default)( + sucraseContext, + options.transforms, + Boolean(options.enableLegacyBabel5ModuleInterop), + options, + ); + const transformerResult = transformer.transform(); + let result = {code: transformerResult.code}; + if (options.sourceMapOptions) { + if (!options.filePath) { + throw new Error("filePath must be specified when generating a source map."); + } + result = { + ...result, + sourceMap: _computeSourceMap2.default.call(void 0, + transformerResult, + options.filePath, + options.sourceMapOptions, + code, + sucraseContext.tokenProcessor.tokens, + ), + }; + } + return result; + // eslint-disable-next-line @typescript-eslint/no-explicit-any + } catch (e) { + if (options.filePath) { + e.message = `Error transforming ${options.filePath}: ${e.message}`; + } + throw e; + } +} exports.transform = transform; + +/** + * Return a string representation of the sucrase tokens, mostly useful for + * diagnostic purposes. + */ + function getFormattedTokens(code, options) { + const tokens = getSucraseContext(code, options).tokenProcessor.tokens; + return _formatTokens2.default.call(void 0, code, tokens); +} exports.getFormattedTokens = getFormattedTokens; + +/** + * Call into the parser/tokenizer and do some further preprocessing: + * - Come up with a set of used names so that we can assign new names. + * - Preprocess all import/export statements so we know which globals we are interested in. + * - Compute situations where any of those globals are shadowed. + * + * In the future, some of these preprocessing steps can be skipped based on what actual work is + * being done. + */ +function getSucraseContext(code, options) { + const isJSXEnabled = options.transforms.includes("jsx"); + const isTypeScriptEnabled = options.transforms.includes("typescript"); + const isFlowEnabled = options.transforms.includes("flow"); + const disableESTransforms = options.disableESTransforms === true; + const file = _parser.parse.call(void 0, code, isJSXEnabled, isTypeScriptEnabled, isFlowEnabled); + const tokens = file.tokens; + const scopes = file.scopes; + + const nameManager = new (0, _NameManager2.default)(code, tokens); + const helperManager = new (0, _HelperManager.HelperManager)(nameManager); + const tokenProcessor = new (0, _TokenProcessor2.default)( + code, + tokens, + isFlowEnabled, + disableESTransforms, + helperManager, + ); + const enableLegacyTypeScriptModuleInterop = Boolean(options.enableLegacyTypeScriptModuleInterop); + + let importProcessor = null; + if (options.transforms.includes("imports")) { + importProcessor = new (0, _CJSImportProcessor2.default)( + nameManager, + tokenProcessor, + enableLegacyTypeScriptModuleInterop, + options, + options.transforms.includes("typescript"), + Boolean(options.keepUnusedImports), + helperManager, + ); + importProcessor.preprocessTokens(); + // We need to mark shadowed globals after processing imports so we know that the globals are, + // but before type-only import pruning, since that relies on shadowing information. + _identifyShadowedGlobals2.default.call(void 0, tokenProcessor, scopes, importProcessor.getGlobalNames()); + if (options.transforms.includes("typescript") && !options.keepUnusedImports) { + importProcessor.pruneTypeOnlyImports(); + } + } else if (options.transforms.includes("typescript") && !options.keepUnusedImports) { + // Shadowed global detection is needed for TS implicit elision of imported names. + _identifyShadowedGlobals2.default.call(void 0, tokenProcessor, scopes, _getTSImportedNames2.default.call(void 0, tokenProcessor)); + } + return {tokenProcessor, scopes, nameManager, importProcessor, helperManager}; +} Index: frontend/node_modules/sucrase/dist/parser/index.js =================================================================== --- frontend/node_modules/sucrase/dist/parser/index.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/parser/index.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,31 @@ +"use strict";Object.defineProperty(exports, "__esModule", {value: true}); + +var _base = require('./traverser/base'); +var _index = require('./traverser/index'); + + class File { + + + + constructor(tokens, scopes) { + this.tokens = tokens; + this.scopes = scopes; + } +} exports.File = File; + + function parse( + input, + isJSXEnabled, + isTypeScriptEnabled, + isFlowEnabled, +) { + if (isFlowEnabled && isTypeScriptEnabled) { + throw new Error("Cannot combine flow and typescript plugins."); + } + _base.initParser.call(void 0, input, isJSXEnabled, isTypeScriptEnabled, isFlowEnabled); + const result = _index.parseFile.call(void 0, ); + if (_base.state.error) { + throw _base.augmentError.call(void 0, _base.state.error); + } + return result; +} exports.parse = parse; Index: frontend/node_modules/sucrase/dist/parser/plugins/flow.js =================================================================== --- frontend/node_modules/sucrase/dist/parser/plugins/flow.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/parser/plugins/flow.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,1105 @@ +"use strict";Object.defineProperty(exports, "__esModule", {value: true});/* eslint max-len: 0 */ + + + + + + + + + + +var _index = require('../tokenizer/index'); +var _keywords = require('../tokenizer/keywords'); +var _types = require('../tokenizer/types'); +var _base = require('../traverser/base'); + + + + + + + + + + + + + +var _expression = require('../traverser/expression'); + + + + + + + + +var _statement = require('../traverser/statement'); + + + + + + + + + +var _util = require('../traverser/util'); + +function isMaybeDefaultImport(lookahead) { + return ( + (lookahead.type === _types.TokenType.name || !!(lookahead.type & _types.TokenType.IS_KEYWORD)) && + lookahead.contextualKeyword !== _keywords.ContextualKeyword._from + ); +} + +function flowParseTypeInitialiser(tok) { + const oldIsType = _index.pushTypeContext.call(void 0, 0); + _util.expect.call(void 0, tok || _types.TokenType.colon); + flowParseType(); + _index.popTypeContext.call(void 0, oldIsType); +} + +function flowParsePredicate() { + _util.expect.call(void 0, _types.TokenType.modulo); + _util.expectContextual.call(void 0, _keywords.ContextualKeyword._checks); + if (_index.eat.call(void 0, _types.TokenType.parenL)) { + _expression.parseExpression.call(void 0, ); + _util.expect.call(void 0, _types.TokenType.parenR); + } +} + +function flowParseTypeAndPredicateInitialiser() { + const oldIsType = _index.pushTypeContext.call(void 0, 0); + _util.expect.call(void 0, _types.TokenType.colon); + if (_index.match.call(void 0, _types.TokenType.modulo)) { + flowParsePredicate(); + } else { + flowParseType(); + if (_index.match.call(void 0, _types.TokenType.modulo)) { + flowParsePredicate(); + } + } + _index.popTypeContext.call(void 0, oldIsType); +} + +function flowParseDeclareClass() { + _index.next.call(void 0, ); + flowParseInterfaceish(/* isClass */ true); +} + +function flowParseDeclareFunction() { + _index.next.call(void 0, ); + _expression.parseIdentifier.call(void 0, ); + + if (_index.match.call(void 0, _types.TokenType.lessThan)) { + flowParseTypeParameterDeclaration(); + } + + _util.expect.call(void 0, _types.TokenType.parenL); + flowParseFunctionTypeParams(); + _util.expect.call(void 0, _types.TokenType.parenR); + + flowParseTypeAndPredicateInitialiser(); + + _util.semicolon.call(void 0, ); +} + +function flowParseDeclare() { + if (_index.match.call(void 0, _types.TokenType._class)) { + flowParseDeclareClass(); + } else if (_index.match.call(void 0, _types.TokenType._function)) { + flowParseDeclareFunction(); + } else if (_index.match.call(void 0, _types.TokenType._var)) { + flowParseDeclareVariable(); + } else if (_util.eatContextual.call(void 0, _keywords.ContextualKeyword._module)) { + if (_index.eat.call(void 0, _types.TokenType.dot)) { + flowParseDeclareModuleExports(); + } else { + flowParseDeclareModule(); + } + } else if (_util.isContextual.call(void 0, _keywords.ContextualKeyword._type)) { + flowParseDeclareTypeAlias(); + } else if (_util.isContextual.call(void 0, _keywords.ContextualKeyword._opaque)) { + flowParseDeclareOpaqueType(); + } else if (_util.isContextual.call(void 0, _keywords.ContextualKeyword._interface)) { + flowParseDeclareInterface(); + } else if (_index.match.call(void 0, _types.TokenType._export)) { + flowParseDeclareExportDeclaration(); + } else { + _util.unexpected.call(void 0, ); + } +} + +function flowParseDeclareVariable() { + _index.next.call(void 0, ); + flowParseTypeAnnotatableIdentifier(); + _util.semicolon.call(void 0, ); +} + +function flowParseDeclareModule() { + if (_index.match.call(void 0, _types.TokenType.string)) { + _expression.parseExprAtom.call(void 0, ); + } else { + _expression.parseIdentifier.call(void 0, ); + } + + _util.expect.call(void 0, _types.TokenType.braceL); + while (!_index.match.call(void 0, _types.TokenType.braceR) && !_base.state.error) { + if (_index.match.call(void 0, _types.TokenType._import)) { + _index.next.call(void 0, ); + _statement.parseImport.call(void 0, ); + } else { + _util.unexpected.call(void 0, ); + } + } + _util.expect.call(void 0, _types.TokenType.braceR); +} + +function flowParseDeclareExportDeclaration() { + _util.expect.call(void 0, _types.TokenType._export); + + if (_index.eat.call(void 0, _types.TokenType._default)) { + if (_index.match.call(void 0, _types.TokenType._function) || _index.match.call(void 0, _types.TokenType._class)) { + // declare export default class ... + // declare export default function ... + flowParseDeclare(); + } else { + // declare export default [type]; + flowParseType(); + _util.semicolon.call(void 0, ); + } + } else if ( + _index.match.call(void 0, _types.TokenType._var) || // declare export var ... + _index.match.call(void 0, _types.TokenType._function) || // declare export function ... + _index.match.call(void 0, _types.TokenType._class) || // declare export class ... + _util.isContextual.call(void 0, _keywords.ContextualKeyword._opaque) // declare export opaque .. + ) { + flowParseDeclare(); + } else if ( + _index.match.call(void 0, _types.TokenType.star) || // declare export * from '' + _index.match.call(void 0, _types.TokenType.braceL) || // declare export {} ... + _util.isContextual.call(void 0, _keywords.ContextualKeyword._interface) || // declare export interface ... + _util.isContextual.call(void 0, _keywords.ContextualKeyword._type) || // declare export type ... + _util.isContextual.call(void 0, _keywords.ContextualKeyword._opaque) // declare export opaque type ... + ) { + _statement.parseExport.call(void 0, ); + } else { + _util.unexpected.call(void 0, ); + } +} + +function flowParseDeclareModuleExports() { + _util.expectContextual.call(void 0, _keywords.ContextualKeyword._exports); + flowParseTypeAnnotation(); + _util.semicolon.call(void 0, ); +} + +function flowParseDeclareTypeAlias() { + _index.next.call(void 0, ); + flowParseTypeAlias(); +} + +function flowParseDeclareOpaqueType() { + _index.next.call(void 0, ); + flowParseOpaqueType(true); +} + +function flowParseDeclareInterface() { + _index.next.call(void 0, ); + flowParseInterfaceish(); +} + +// Interfaces + +function flowParseInterfaceish(isClass = false) { + flowParseRestrictedIdentifier(); + + if (_index.match.call(void 0, _types.TokenType.lessThan)) { + flowParseTypeParameterDeclaration(); + } + + if (_index.eat.call(void 0, _types.TokenType._extends)) { + do { + flowParseInterfaceExtends(); + } while (!isClass && _index.eat.call(void 0, _types.TokenType.comma)); + } + + if (_util.isContextual.call(void 0, _keywords.ContextualKeyword._mixins)) { + _index.next.call(void 0, ); + do { + flowParseInterfaceExtends(); + } while (_index.eat.call(void 0, _types.TokenType.comma)); + } + + if (_util.isContextual.call(void 0, _keywords.ContextualKeyword._implements)) { + _index.next.call(void 0, ); + do { + flowParseInterfaceExtends(); + } while (_index.eat.call(void 0, _types.TokenType.comma)); + } + + flowParseObjectType(isClass, false, isClass); +} + +function flowParseInterfaceExtends() { + flowParseQualifiedTypeIdentifier(false); + if (_index.match.call(void 0, _types.TokenType.lessThan)) { + flowParseTypeParameterInstantiation(); + } +} + +function flowParseInterface() { + flowParseInterfaceish(); +} + +function flowParseRestrictedIdentifier() { + _expression.parseIdentifier.call(void 0, ); +} + +function flowParseTypeAlias() { + flowParseRestrictedIdentifier(); + + if (_index.match.call(void 0, _types.TokenType.lessThan)) { + flowParseTypeParameterDeclaration(); + } + + flowParseTypeInitialiser(_types.TokenType.eq); + _util.semicolon.call(void 0, ); +} + +function flowParseOpaqueType(declare) { + _util.expectContextual.call(void 0, _keywords.ContextualKeyword._type); + flowParseRestrictedIdentifier(); + + if (_index.match.call(void 0, _types.TokenType.lessThan)) { + flowParseTypeParameterDeclaration(); + } + + // Parse the supertype + if (_index.match.call(void 0, _types.TokenType.colon)) { + flowParseTypeInitialiser(_types.TokenType.colon); + } + + if (!declare) { + flowParseTypeInitialiser(_types.TokenType.eq); + } + _util.semicolon.call(void 0, ); +} + +function flowParseTypeParameter() { + flowParseVariance(); + flowParseTypeAnnotatableIdentifier(); + + if (_index.eat.call(void 0, _types.TokenType.eq)) { + flowParseType(); + } +} + + function flowParseTypeParameterDeclaration() { + const oldIsType = _index.pushTypeContext.call(void 0, 0); + // istanbul ignore else: this condition is already checked at all call sites + if (_index.match.call(void 0, _types.TokenType.lessThan) || _index.match.call(void 0, _types.TokenType.typeParameterStart)) { + _index.next.call(void 0, ); + } else { + _util.unexpected.call(void 0, ); + } + + do { + flowParseTypeParameter(); + if (!_index.match.call(void 0, _types.TokenType.greaterThan)) { + _util.expect.call(void 0, _types.TokenType.comma); + } + } while (!_index.match.call(void 0, _types.TokenType.greaterThan) && !_base.state.error); + _util.expect.call(void 0, _types.TokenType.greaterThan); + _index.popTypeContext.call(void 0, oldIsType); +} exports.flowParseTypeParameterDeclaration = flowParseTypeParameterDeclaration; + +function flowParseTypeParameterInstantiation() { + const oldIsType = _index.pushTypeContext.call(void 0, 0); + _util.expect.call(void 0, _types.TokenType.lessThan); + while (!_index.match.call(void 0, _types.TokenType.greaterThan) && !_base.state.error) { + flowParseType(); + if (!_index.match.call(void 0, _types.TokenType.greaterThan)) { + _util.expect.call(void 0, _types.TokenType.comma); + } + } + _util.expect.call(void 0, _types.TokenType.greaterThan); + _index.popTypeContext.call(void 0, oldIsType); +} + +function flowParseInterfaceType() { + _util.expectContextual.call(void 0, _keywords.ContextualKeyword._interface); + if (_index.eat.call(void 0, _types.TokenType._extends)) { + do { + flowParseInterfaceExtends(); + } while (_index.eat.call(void 0, _types.TokenType.comma)); + } + flowParseObjectType(false, false, false); +} + +function flowParseObjectPropertyKey() { + if (_index.match.call(void 0, _types.TokenType.num) || _index.match.call(void 0, _types.TokenType.string)) { + _expression.parseExprAtom.call(void 0, ); + } else { + _expression.parseIdentifier.call(void 0, ); + } +} + +function flowParseObjectTypeIndexer() { + // Note: bracketL has already been consumed + if (_index.lookaheadType.call(void 0, ) === _types.TokenType.colon) { + flowParseObjectPropertyKey(); + flowParseTypeInitialiser(); + } else { + flowParseType(); + } + _util.expect.call(void 0, _types.TokenType.bracketR); + flowParseTypeInitialiser(); +} + +function flowParseObjectTypeInternalSlot() { + // Note: both bracketL have already been consumed + flowParseObjectPropertyKey(); + _util.expect.call(void 0, _types.TokenType.bracketR); + _util.expect.call(void 0, _types.TokenType.bracketR); + if (_index.match.call(void 0, _types.TokenType.lessThan) || _index.match.call(void 0, _types.TokenType.parenL)) { + flowParseObjectTypeMethodish(); + } else { + _index.eat.call(void 0, _types.TokenType.question); + flowParseTypeInitialiser(); + } +} + +function flowParseObjectTypeMethodish() { + if (_index.match.call(void 0, _types.TokenType.lessThan)) { + flowParseTypeParameterDeclaration(); + } + + _util.expect.call(void 0, _types.TokenType.parenL); + while (!_index.match.call(void 0, _types.TokenType.parenR) && !_index.match.call(void 0, _types.TokenType.ellipsis) && !_base.state.error) { + flowParseFunctionTypeParam(); + if (!_index.match.call(void 0, _types.TokenType.parenR)) { + _util.expect.call(void 0, _types.TokenType.comma); + } + } + + if (_index.eat.call(void 0, _types.TokenType.ellipsis)) { + flowParseFunctionTypeParam(); + } + _util.expect.call(void 0, _types.TokenType.parenR); + flowParseTypeInitialiser(); +} + +function flowParseObjectTypeCallProperty() { + flowParseObjectTypeMethodish(); +} + +function flowParseObjectType(allowStatic, allowExact, allowProto) { + let endDelim; + if (allowExact && _index.match.call(void 0, _types.TokenType.braceBarL)) { + _util.expect.call(void 0, _types.TokenType.braceBarL); + endDelim = _types.TokenType.braceBarR; + } else { + _util.expect.call(void 0, _types.TokenType.braceL); + endDelim = _types.TokenType.braceR; + } + + while (!_index.match.call(void 0, endDelim) && !_base.state.error) { + if (allowProto && _util.isContextual.call(void 0, _keywords.ContextualKeyword._proto)) { + const lookahead = _index.lookaheadType.call(void 0, ); + if (lookahead !== _types.TokenType.colon && lookahead !== _types.TokenType.question) { + _index.next.call(void 0, ); + allowStatic = false; + } + } + if (allowStatic && _util.isContextual.call(void 0, _keywords.ContextualKeyword._static)) { + const lookahead = _index.lookaheadType.call(void 0, ); + if (lookahead !== _types.TokenType.colon && lookahead !== _types.TokenType.question) { + _index.next.call(void 0, ); + } + } + + flowParseVariance(); + + if (_index.eat.call(void 0, _types.TokenType.bracketL)) { + if (_index.eat.call(void 0, _types.TokenType.bracketL)) { + flowParseObjectTypeInternalSlot(); + } else { + flowParseObjectTypeIndexer(); + } + } else if (_index.match.call(void 0, _types.TokenType.parenL) || _index.match.call(void 0, _types.TokenType.lessThan)) { + flowParseObjectTypeCallProperty(); + } else { + if (_util.isContextual.call(void 0, _keywords.ContextualKeyword._get) || _util.isContextual.call(void 0, _keywords.ContextualKeyword._set)) { + const lookahead = _index.lookaheadType.call(void 0, ); + if (lookahead === _types.TokenType.name || lookahead === _types.TokenType.string || lookahead === _types.TokenType.num) { + _index.next.call(void 0, ); + } + } + + flowParseObjectTypeProperty(); + } + + flowObjectTypeSemicolon(); + } + + _util.expect.call(void 0, endDelim); +} + +function flowParseObjectTypeProperty() { + if (_index.match.call(void 0, _types.TokenType.ellipsis)) { + _util.expect.call(void 0, _types.TokenType.ellipsis); + if (!_index.eat.call(void 0, _types.TokenType.comma)) { + _index.eat.call(void 0, _types.TokenType.semi); + } + // Explicit inexact object syntax. + if (_index.match.call(void 0, _types.TokenType.braceR)) { + return; + } + flowParseType(); + } else { + flowParseObjectPropertyKey(); + if (_index.match.call(void 0, _types.TokenType.lessThan) || _index.match.call(void 0, _types.TokenType.parenL)) { + // This is a method property + flowParseObjectTypeMethodish(); + } else { + _index.eat.call(void 0, _types.TokenType.question); + flowParseTypeInitialiser(); + } + } +} + +function flowObjectTypeSemicolon() { + if (!_index.eat.call(void 0, _types.TokenType.semi) && !_index.eat.call(void 0, _types.TokenType.comma) && !_index.match.call(void 0, _types.TokenType.braceR) && !_index.match.call(void 0, _types.TokenType.braceBarR)) { + _util.unexpected.call(void 0, ); + } +} + +function flowParseQualifiedTypeIdentifier(initialIdAlreadyParsed) { + if (!initialIdAlreadyParsed) { + _expression.parseIdentifier.call(void 0, ); + } + while (_index.eat.call(void 0, _types.TokenType.dot)) { + _expression.parseIdentifier.call(void 0, ); + } +} + +function flowParseGenericType() { + flowParseQualifiedTypeIdentifier(true); + if (_index.match.call(void 0, _types.TokenType.lessThan)) { + flowParseTypeParameterInstantiation(); + } +} + +function flowParseTypeofType() { + _util.expect.call(void 0, _types.TokenType._typeof); + flowParsePrimaryType(); +} + +function flowParseTupleType() { + _util.expect.call(void 0, _types.TokenType.bracketL); + // We allow trailing commas + while (_base.state.pos < _base.input.length && !_index.match.call(void 0, _types.TokenType.bracketR)) { + flowParseType(); + if (_index.match.call(void 0, _types.TokenType.bracketR)) { + break; + } + _util.expect.call(void 0, _types.TokenType.comma); + } + _util.expect.call(void 0, _types.TokenType.bracketR); +} + +function flowParseFunctionTypeParam() { + const lookahead = _index.lookaheadType.call(void 0, ); + if (lookahead === _types.TokenType.colon || lookahead === _types.TokenType.question) { + _expression.parseIdentifier.call(void 0, ); + _index.eat.call(void 0, _types.TokenType.question); + flowParseTypeInitialiser(); + } else { + flowParseType(); + } +} + +function flowParseFunctionTypeParams() { + while (!_index.match.call(void 0, _types.TokenType.parenR) && !_index.match.call(void 0, _types.TokenType.ellipsis) && !_base.state.error) { + flowParseFunctionTypeParam(); + if (!_index.match.call(void 0, _types.TokenType.parenR)) { + _util.expect.call(void 0, _types.TokenType.comma); + } + } + if (_index.eat.call(void 0, _types.TokenType.ellipsis)) { + flowParseFunctionTypeParam(); + } +} + +// The parsing of types roughly parallels the parsing of expressions, and +// primary types are kind of like primary expressions...they're the +// primitives with which other types are constructed. +function flowParsePrimaryType() { + let isGroupedType = false; + const oldNoAnonFunctionType = _base.state.noAnonFunctionType; + + switch (_base.state.type) { + case _types.TokenType.name: { + if (_util.isContextual.call(void 0, _keywords.ContextualKeyword._interface)) { + flowParseInterfaceType(); + return; + } + _expression.parseIdentifier.call(void 0, ); + flowParseGenericType(); + return; + } + + case _types.TokenType.braceL: + flowParseObjectType(false, false, false); + return; + + case _types.TokenType.braceBarL: + flowParseObjectType(false, true, false); + return; + + case _types.TokenType.bracketL: + flowParseTupleType(); + return; + + case _types.TokenType.lessThan: + flowParseTypeParameterDeclaration(); + _util.expect.call(void 0, _types.TokenType.parenL); + flowParseFunctionTypeParams(); + _util.expect.call(void 0, _types.TokenType.parenR); + _util.expect.call(void 0, _types.TokenType.arrow); + flowParseType(); + return; + + case _types.TokenType.parenL: + _index.next.call(void 0, ); + + // Check to see if this is actually a grouped type + if (!_index.match.call(void 0, _types.TokenType.parenR) && !_index.match.call(void 0, _types.TokenType.ellipsis)) { + if (_index.match.call(void 0, _types.TokenType.name)) { + const token = _index.lookaheadType.call(void 0, ); + isGroupedType = token !== _types.TokenType.question && token !== _types.TokenType.colon; + } else { + isGroupedType = true; + } + } + + if (isGroupedType) { + _base.state.noAnonFunctionType = false; + flowParseType(); + _base.state.noAnonFunctionType = oldNoAnonFunctionType; + + // A `,` or a `) =>` means this is an anonymous function type + if ( + _base.state.noAnonFunctionType || + !(_index.match.call(void 0, _types.TokenType.comma) || (_index.match.call(void 0, _types.TokenType.parenR) && _index.lookaheadType.call(void 0, ) === _types.TokenType.arrow)) + ) { + _util.expect.call(void 0, _types.TokenType.parenR); + return; + } else { + // Eat a comma if there is one + _index.eat.call(void 0, _types.TokenType.comma); + } + } + + flowParseFunctionTypeParams(); + + _util.expect.call(void 0, _types.TokenType.parenR); + _util.expect.call(void 0, _types.TokenType.arrow); + flowParseType(); + return; + + case _types.TokenType.minus: + _index.next.call(void 0, ); + _expression.parseLiteral.call(void 0, ); + return; + + case _types.TokenType.string: + case _types.TokenType.num: + case _types.TokenType._true: + case _types.TokenType._false: + case _types.TokenType._null: + case _types.TokenType._this: + case _types.TokenType._void: + case _types.TokenType.star: + _index.next.call(void 0, ); + return; + + default: + if (_base.state.type === _types.TokenType._typeof) { + flowParseTypeofType(); + return; + } else if (_base.state.type & _types.TokenType.IS_KEYWORD) { + _index.next.call(void 0, ); + _base.state.tokens[_base.state.tokens.length - 1].type = _types.TokenType.name; + return; + } + } + + _util.unexpected.call(void 0, ); +} + +function flowParsePostfixType() { + flowParsePrimaryType(); + while (!_util.canInsertSemicolon.call(void 0, ) && (_index.match.call(void 0, _types.TokenType.bracketL) || _index.match.call(void 0, _types.TokenType.questionDot))) { + _index.eat.call(void 0, _types.TokenType.questionDot); + _util.expect.call(void 0, _types.TokenType.bracketL); + if (_index.eat.call(void 0, _types.TokenType.bracketR)) { + // Array type + } else { + // Indexed access type + flowParseType(); + _util.expect.call(void 0, _types.TokenType.bracketR); + } + } +} + +function flowParsePrefixType() { + if (_index.eat.call(void 0, _types.TokenType.question)) { + flowParsePrefixType(); + } else { + flowParsePostfixType(); + } +} + +function flowParseAnonFunctionWithoutParens() { + flowParsePrefixType(); + if (!_base.state.noAnonFunctionType && _index.eat.call(void 0, _types.TokenType.arrow)) { + flowParseType(); + } +} + +function flowParseIntersectionType() { + _index.eat.call(void 0, _types.TokenType.bitwiseAND); + flowParseAnonFunctionWithoutParens(); + while (_index.eat.call(void 0, _types.TokenType.bitwiseAND)) { + flowParseAnonFunctionWithoutParens(); + } +} + +function flowParseUnionType() { + _index.eat.call(void 0, _types.TokenType.bitwiseOR); + flowParseIntersectionType(); + while (_index.eat.call(void 0, _types.TokenType.bitwiseOR)) { + flowParseIntersectionType(); + } +} + +function flowParseType() { + flowParseUnionType(); +} + + function flowParseTypeAnnotation() { + flowParseTypeInitialiser(); +} exports.flowParseTypeAnnotation = flowParseTypeAnnotation; + +function flowParseTypeAnnotatableIdentifier() { + _expression.parseIdentifier.call(void 0, ); + if (_index.match.call(void 0, _types.TokenType.colon)) { + flowParseTypeAnnotation(); + } +} + + function flowParseVariance() { + if (_index.match.call(void 0, _types.TokenType.plus) || _index.match.call(void 0, _types.TokenType.minus)) { + _index.next.call(void 0, ); + _base.state.tokens[_base.state.tokens.length - 1].isType = true; + } +} exports.flowParseVariance = flowParseVariance; + +// ================================== +// Overrides +// ================================== + + function flowParseFunctionBodyAndFinish(funcContextId) { + // For arrow functions, `parseArrow` handles the return type itself. + if (_index.match.call(void 0, _types.TokenType.colon)) { + flowParseTypeAndPredicateInitialiser(); + } + + _expression.parseFunctionBody.call(void 0, false, funcContextId); +} exports.flowParseFunctionBodyAndFinish = flowParseFunctionBodyAndFinish; + + function flowParseSubscript( + startTokenIndex, + noCalls, + stopState, +) { + if (_index.match.call(void 0, _types.TokenType.questionDot) && _index.lookaheadType.call(void 0, ) === _types.TokenType.lessThan) { + if (noCalls) { + stopState.stop = true; + return; + } + _index.next.call(void 0, ); + flowParseTypeParameterInstantiation(); + _util.expect.call(void 0, _types.TokenType.parenL); + _expression.parseCallExpressionArguments.call(void 0, ); + return; + } else if (!noCalls && _index.match.call(void 0, _types.TokenType.lessThan)) { + const snapshot = _base.state.snapshot(); + flowParseTypeParameterInstantiation(); + _util.expect.call(void 0, _types.TokenType.parenL); + _expression.parseCallExpressionArguments.call(void 0, ); + if (_base.state.error) { + _base.state.restoreFromSnapshot(snapshot); + } else { + return; + } + } + _expression.baseParseSubscript.call(void 0, startTokenIndex, noCalls, stopState); +} exports.flowParseSubscript = flowParseSubscript; + + function flowStartParseNewArguments() { + if (_index.match.call(void 0, _types.TokenType.lessThan)) { + const snapshot = _base.state.snapshot(); + flowParseTypeParameterInstantiation(); + if (_base.state.error) { + _base.state.restoreFromSnapshot(snapshot); + } + } +} exports.flowStartParseNewArguments = flowStartParseNewArguments; + +// interfaces + function flowTryParseStatement() { + if (_index.match.call(void 0, _types.TokenType.name) && _base.state.contextualKeyword === _keywords.ContextualKeyword._interface) { + const oldIsType = _index.pushTypeContext.call(void 0, 0); + _index.next.call(void 0, ); + flowParseInterface(); + _index.popTypeContext.call(void 0, oldIsType); + return true; + } else if (_util.isContextual.call(void 0, _keywords.ContextualKeyword._enum)) { + flowParseEnumDeclaration(); + return true; + } + return false; +} exports.flowTryParseStatement = flowTryParseStatement; + + function flowTryParseExportDefaultExpression() { + if (_util.isContextual.call(void 0, _keywords.ContextualKeyword._enum)) { + flowParseEnumDeclaration(); + return true; + } + return false; +} exports.flowTryParseExportDefaultExpression = flowTryParseExportDefaultExpression; + +// declares, interfaces and type aliases + function flowParseIdentifierStatement(contextualKeyword) { + if (contextualKeyword === _keywords.ContextualKeyword._declare) { + if ( + _index.match.call(void 0, _types.TokenType._class) || + _index.match.call(void 0, _types.TokenType.name) || + _index.match.call(void 0, _types.TokenType._function) || + _index.match.call(void 0, _types.TokenType._var) || + _index.match.call(void 0, _types.TokenType._export) + ) { + const oldIsType = _index.pushTypeContext.call(void 0, 1); + flowParseDeclare(); + _index.popTypeContext.call(void 0, oldIsType); + } + } else if (_index.match.call(void 0, _types.TokenType.name)) { + if (contextualKeyword === _keywords.ContextualKeyword._interface) { + const oldIsType = _index.pushTypeContext.call(void 0, 1); + flowParseInterface(); + _index.popTypeContext.call(void 0, oldIsType); + } else if (contextualKeyword === _keywords.ContextualKeyword._type) { + const oldIsType = _index.pushTypeContext.call(void 0, 1); + flowParseTypeAlias(); + _index.popTypeContext.call(void 0, oldIsType); + } else if (contextualKeyword === _keywords.ContextualKeyword._opaque) { + const oldIsType = _index.pushTypeContext.call(void 0, 1); + flowParseOpaqueType(false); + _index.popTypeContext.call(void 0, oldIsType); + } + } + _util.semicolon.call(void 0, ); +} exports.flowParseIdentifierStatement = flowParseIdentifierStatement; + +// export type + function flowShouldParseExportDeclaration() { + return ( + _util.isContextual.call(void 0, _keywords.ContextualKeyword._type) || + _util.isContextual.call(void 0, _keywords.ContextualKeyword._interface) || + _util.isContextual.call(void 0, _keywords.ContextualKeyword._opaque) || + _util.isContextual.call(void 0, _keywords.ContextualKeyword._enum) + ); +} exports.flowShouldParseExportDeclaration = flowShouldParseExportDeclaration; + + function flowShouldDisallowExportDefaultSpecifier() { + return ( + _index.match.call(void 0, _types.TokenType.name) && + (_base.state.contextualKeyword === _keywords.ContextualKeyword._type || + _base.state.contextualKeyword === _keywords.ContextualKeyword._interface || + _base.state.contextualKeyword === _keywords.ContextualKeyword._opaque || + _base.state.contextualKeyword === _keywords.ContextualKeyword._enum) + ); +} exports.flowShouldDisallowExportDefaultSpecifier = flowShouldDisallowExportDefaultSpecifier; + + function flowParseExportDeclaration() { + if (_util.isContextual.call(void 0, _keywords.ContextualKeyword._type)) { + const oldIsType = _index.pushTypeContext.call(void 0, 1); + _index.next.call(void 0, ); + + if (_index.match.call(void 0, _types.TokenType.braceL)) { + // export type { foo, bar }; + _statement.parseExportSpecifiers.call(void 0, ); + _statement.parseExportFrom.call(void 0, ); + } else { + // export type Foo = Bar; + flowParseTypeAlias(); + } + _index.popTypeContext.call(void 0, oldIsType); + } else if (_util.isContextual.call(void 0, _keywords.ContextualKeyword._opaque)) { + const oldIsType = _index.pushTypeContext.call(void 0, 1); + _index.next.call(void 0, ); + // export opaque type Foo = Bar; + flowParseOpaqueType(false); + _index.popTypeContext.call(void 0, oldIsType); + } else if (_util.isContextual.call(void 0, _keywords.ContextualKeyword._interface)) { + const oldIsType = _index.pushTypeContext.call(void 0, 1); + _index.next.call(void 0, ); + flowParseInterface(); + _index.popTypeContext.call(void 0, oldIsType); + } else { + _statement.parseStatement.call(void 0, true); + } +} exports.flowParseExportDeclaration = flowParseExportDeclaration; + + function flowShouldParseExportStar() { + return _index.match.call(void 0, _types.TokenType.star) || (_util.isContextual.call(void 0, _keywords.ContextualKeyword._type) && _index.lookaheadType.call(void 0, ) === _types.TokenType.star); +} exports.flowShouldParseExportStar = flowShouldParseExportStar; + + function flowParseExportStar() { + if (_util.eatContextual.call(void 0, _keywords.ContextualKeyword._type)) { + const oldIsType = _index.pushTypeContext.call(void 0, 2); + _statement.baseParseExportStar.call(void 0, ); + _index.popTypeContext.call(void 0, oldIsType); + } else { + _statement.baseParseExportStar.call(void 0, ); + } +} exports.flowParseExportStar = flowParseExportStar; + +// parse a the super class type parameters and implements + function flowAfterParseClassSuper(hasSuper) { + if (hasSuper && _index.match.call(void 0, _types.TokenType.lessThan)) { + flowParseTypeParameterInstantiation(); + } + if (_util.isContextual.call(void 0, _keywords.ContextualKeyword._implements)) { + const oldIsType = _index.pushTypeContext.call(void 0, 0); + _index.next.call(void 0, ); + _base.state.tokens[_base.state.tokens.length - 1].type = _types.TokenType._implements; + do { + flowParseRestrictedIdentifier(); + if (_index.match.call(void 0, _types.TokenType.lessThan)) { + flowParseTypeParameterInstantiation(); + } + } while (_index.eat.call(void 0, _types.TokenType.comma)); + _index.popTypeContext.call(void 0, oldIsType); + } +} exports.flowAfterParseClassSuper = flowAfterParseClassSuper; + +// parse type parameters for object method shorthand + function flowStartParseObjPropValue() { + // method shorthand + if (_index.match.call(void 0, _types.TokenType.lessThan)) { + flowParseTypeParameterDeclaration(); + if (!_index.match.call(void 0, _types.TokenType.parenL)) _util.unexpected.call(void 0, ); + } +} exports.flowStartParseObjPropValue = flowStartParseObjPropValue; + + function flowParseAssignableListItemTypes() { + const oldIsType = _index.pushTypeContext.call(void 0, 0); + _index.eat.call(void 0, _types.TokenType.question); + if (_index.match.call(void 0, _types.TokenType.colon)) { + flowParseTypeAnnotation(); + } + _index.popTypeContext.call(void 0, oldIsType); +} exports.flowParseAssignableListItemTypes = flowParseAssignableListItemTypes; + +// parse typeof and type imports + function flowStartParseImportSpecifiers() { + if (_index.match.call(void 0, _types.TokenType._typeof) || _util.isContextual.call(void 0, _keywords.ContextualKeyword._type)) { + const lh = _index.lookaheadTypeAndKeyword.call(void 0, ); + if (isMaybeDefaultImport(lh) || lh.type === _types.TokenType.braceL || lh.type === _types.TokenType.star) { + _index.next.call(void 0, ); + } + } +} exports.flowStartParseImportSpecifiers = flowStartParseImportSpecifiers; + +// parse import-type/typeof shorthand + function flowParseImportSpecifier() { + const isTypeKeyword = + _base.state.contextualKeyword === _keywords.ContextualKeyword._type || _base.state.type === _types.TokenType._typeof; + if (isTypeKeyword) { + _index.next.call(void 0, ); + } else { + _expression.parseIdentifier.call(void 0, ); + } + + if (_util.isContextual.call(void 0, _keywords.ContextualKeyword._as) && !_util.isLookaheadContextual.call(void 0, _keywords.ContextualKeyword._as)) { + _expression.parseIdentifier.call(void 0, ); + if (isTypeKeyword && !_index.match.call(void 0, _types.TokenType.name) && !(_base.state.type & _types.TokenType.IS_KEYWORD)) { + // `import {type as ,` or `import {type as }` + } else { + // `import {type as foo` + _expression.parseIdentifier.call(void 0, ); + } + } else { + if (isTypeKeyword && (_index.match.call(void 0, _types.TokenType.name) || !!(_base.state.type & _types.TokenType.IS_KEYWORD))) { + // `import {type foo` + _expression.parseIdentifier.call(void 0, ); + } + if (_util.eatContextual.call(void 0, _keywords.ContextualKeyword._as)) { + _expression.parseIdentifier.call(void 0, ); + } + } +} exports.flowParseImportSpecifier = flowParseImportSpecifier; + +// parse function type parameters - function foo() {} + function flowStartParseFunctionParams() { + // Originally this checked if the method is a getter/setter, but if it was, we'd crash soon + // anyway, so don't try to propagate that information. + if (_index.match.call(void 0, _types.TokenType.lessThan)) { + const oldIsType = _index.pushTypeContext.call(void 0, 0); + flowParseTypeParameterDeclaration(); + _index.popTypeContext.call(void 0, oldIsType); + } +} exports.flowStartParseFunctionParams = flowStartParseFunctionParams; + +// parse flow type annotations on variable declarator heads - let foo: string = bar + function flowAfterParseVarHead() { + if (_index.match.call(void 0, _types.TokenType.colon)) { + flowParseTypeAnnotation(); + } +} exports.flowAfterParseVarHead = flowAfterParseVarHead; + +// parse the return type of an async arrow function - let foo = (async (): number => {}); + function flowStartParseAsyncArrowFromCallExpression() { + if (_index.match.call(void 0, _types.TokenType.colon)) { + const oldNoAnonFunctionType = _base.state.noAnonFunctionType; + _base.state.noAnonFunctionType = true; + flowParseTypeAnnotation(); + _base.state.noAnonFunctionType = oldNoAnonFunctionType; + } +} exports.flowStartParseAsyncArrowFromCallExpression = flowStartParseAsyncArrowFromCallExpression; + +// We need to support type parameter declarations for arrow functions. This +// is tricky. There are three situations we need to handle +// +// 1. This is either JSX or an arrow function. We'll try JSX first. If that +// fails, we'll try an arrow function. If that fails, we'll throw the JSX +// error. +// 2. This is an arrow function. We'll parse the type parameter declaration, +// parse the rest, make sure the rest is an arrow function, and go from +// there +// 3. This is neither. Just call the super method + function flowParseMaybeAssign(noIn, isWithinParens) { + if (_index.match.call(void 0, _types.TokenType.lessThan)) { + const snapshot = _base.state.snapshot(); + let wasArrow = _expression.baseParseMaybeAssign.call(void 0, noIn, isWithinParens); + if (_base.state.error) { + _base.state.restoreFromSnapshot(snapshot); + _base.state.type = _types.TokenType.typeParameterStart; + } else { + return wasArrow; + } + + const oldIsType = _index.pushTypeContext.call(void 0, 0); + flowParseTypeParameterDeclaration(); + _index.popTypeContext.call(void 0, oldIsType); + wasArrow = _expression.baseParseMaybeAssign.call(void 0, noIn, isWithinParens); + if (wasArrow) { + return true; + } + _util.unexpected.call(void 0, ); + } + + return _expression.baseParseMaybeAssign.call(void 0, noIn, isWithinParens); +} exports.flowParseMaybeAssign = flowParseMaybeAssign; + +// handle return types for arrow functions + function flowParseArrow() { + if (_index.match.call(void 0, _types.TokenType.colon)) { + const oldIsType = _index.pushTypeContext.call(void 0, 0); + const snapshot = _base.state.snapshot(); + + const oldNoAnonFunctionType = _base.state.noAnonFunctionType; + _base.state.noAnonFunctionType = true; + flowParseTypeAndPredicateInitialiser(); + _base.state.noAnonFunctionType = oldNoAnonFunctionType; + + if (_util.canInsertSemicolon.call(void 0, )) _util.unexpected.call(void 0, ); + if (!_index.match.call(void 0, _types.TokenType.arrow)) _util.unexpected.call(void 0, ); + + if (_base.state.error) { + _base.state.restoreFromSnapshot(snapshot); + } + _index.popTypeContext.call(void 0, oldIsType); + } + return _index.eat.call(void 0, _types.TokenType.arrow); +} exports.flowParseArrow = flowParseArrow; + + function flowParseSubscripts(startTokenIndex, noCalls = false) { + if ( + _base.state.tokens[_base.state.tokens.length - 1].contextualKeyword === _keywords.ContextualKeyword._async && + _index.match.call(void 0, _types.TokenType.lessThan) + ) { + const snapshot = _base.state.snapshot(); + const wasArrow = parseAsyncArrowWithTypeParameters(); + if (wasArrow && !_base.state.error) { + return; + } + _base.state.restoreFromSnapshot(snapshot); + } + + _expression.baseParseSubscripts.call(void 0, startTokenIndex, noCalls); +} exports.flowParseSubscripts = flowParseSubscripts; + +// Returns true if there was an arrow function here. +function parseAsyncArrowWithTypeParameters() { + _base.state.scopeDepth++; + const startTokenIndex = _base.state.tokens.length; + _statement.parseFunctionParams.call(void 0, ); + if (!_expression.parseArrow.call(void 0, )) { + return false; + } + _expression.parseArrowExpression.call(void 0, startTokenIndex); + return true; +} + +function flowParseEnumDeclaration() { + _util.expectContextual.call(void 0, _keywords.ContextualKeyword._enum); + _base.state.tokens[_base.state.tokens.length - 1].type = _types.TokenType._enum; + _expression.parseIdentifier.call(void 0, ); + flowParseEnumBody(); +} + +function flowParseEnumBody() { + if (_util.eatContextual.call(void 0, _keywords.ContextualKeyword._of)) { + _index.next.call(void 0, ); + } + _util.expect.call(void 0, _types.TokenType.braceL); + flowParseEnumMembers(); + _util.expect.call(void 0, _types.TokenType.braceR); +} + +function flowParseEnumMembers() { + while (!_index.match.call(void 0, _types.TokenType.braceR) && !_base.state.error) { + if (_index.eat.call(void 0, _types.TokenType.ellipsis)) { + break; + } + flowParseEnumMember(); + if (!_index.match.call(void 0, _types.TokenType.braceR)) { + _util.expect.call(void 0, _types.TokenType.comma); + } + } +} + +function flowParseEnumMember() { + _expression.parseIdentifier.call(void 0, ); + if (_index.eat.call(void 0, _types.TokenType.eq)) { + // Flow enum values are always just one token (a string, number, or boolean literal). + _index.next.call(void 0, ); + } +} Index: frontend/node_modules/sucrase/dist/parser/plugins/jsx/index.js =================================================================== --- frontend/node_modules/sucrase/dist/parser/plugins/jsx/index.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/parser/plugins/jsx/index.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,367 @@ +"use strict";Object.defineProperty(exports, "__esModule", {value: true}); + + + + + + + + + +var _index = require('../../tokenizer/index'); +var _types = require('../../tokenizer/types'); +var _base = require('../../traverser/base'); +var _expression = require('../../traverser/expression'); +var _util = require('../../traverser/util'); +var _charcodes = require('../../util/charcodes'); +var _identifier = require('../../util/identifier'); +var _typescript = require('../typescript'); + +/** + * Read token with JSX contents. + * + * In addition to detecting jsxTagStart and also regular tokens that might be + * part of an expression, this code detects the start and end of text ranges + * within JSX children. In order to properly count the number of children, we + * distinguish jsxText from jsxEmptyText, which is a text range that simplifies + * to the empty string after JSX whitespace trimming. + * + * It turns out that a JSX text range will simplify to the empty string if and + * only if both of these conditions hold: + * - The range consists entirely of whitespace characters (only counting space, + * tab, \r, and \n). + * - The range has at least one newline. + * This can be proven by analyzing any implementation of whitespace trimming, + * e.g. formatJSXTextLiteral in Sucrase or cleanJSXElementLiteralChild in Babel. + */ +function jsxReadToken() { + let sawNewline = false; + let sawNonWhitespace = false; + while (true) { + if (_base.state.pos >= _base.input.length) { + _util.unexpected.call(void 0, "Unterminated JSX contents"); + return; + } + + const ch = _base.input.charCodeAt(_base.state.pos); + if (ch === _charcodes.charCodes.lessThan || ch === _charcodes.charCodes.leftCurlyBrace) { + if (_base.state.pos === _base.state.start) { + if (ch === _charcodes.charCodes.lessThan) { + _base.state.pos++; + _index.finishToken.call(void 0, _types.TokenType.jsxTagStart); + return; + } + _index.getTokenFromCode.call(void 0, ch); + return; + } + if (sawNewline && !sawNonWhitespace) { + _index.finishToken.call(void 0, _types.TokenType.jsxEmptyText); + } else { + _index.finishToken.call(void 0, _types.TokenType.jsxText); + } + return; + } + + // This is part of JSX text. + if (ch === _charcodes.charCodes.lineFeed) { + sawNewline = true; + } else if (ch !== _charcodes.charCodes.space && ch !== _charcodes.charCodes.carriageReturn && ch !== _charcodes.charCodes.tab) { + sawNonWhitespace = true; + } + _base.state.pos++; + } +} + +function jsxReadString(quote) { + _base.state.pos++; + for (;;) { + if (_base.state.pos >= _base.input.length) { + _util.unexpected.call(void 0, "Unterminated string constant"); + return; + } + + const ch = _base.input.charCodeAt(_base.state.pos); + if (ch === quote) { + _base.state.pos++; + break; + } + _base.state.pos++; + } + _index.finishToken.call(void 0, _types.TokenType.string); +} + +// Read a JSX identifier (valid tag or attribute name). +// +// Optimized version since JSX identifiers can't contain +// escape characters and so can be read as single slice. +// Also assumes that first character was already checked +// by isIdentifierStart in readToken. + +function jsxReadWord() { + let ch; + do { + if (_base.state.pos > _base.input.length) { + _util.unexpected.call(void 0, "Unexpectedly reached the end of input."); + return; + } + ch = _base.input.charCodeAt(++_base.state.pos); + } while (_identifier.IS_IDENTIFIER_CHAR[ch] || ch === _charcodes.charCodes.dash); + _index.finishToken.call(void 0, _types.TokenType.jsxName); +} + +// Parse next token as JSX identifier +function jsxParseIdentifier() { + nextJSXTagToken(); +} + +// Parse namespaced identifier. +function jsxParseNamespacedName(identifierRole) { + jsxParseIdentifier(); + if (!_index.eat.call(void 0, _types.TokenType.colon)) { + // Plain identifier, so this is an access. + _base.state.tokens[_base.state.tokens.length - 1].identifierRole = identifierRole; + return; + } + // Process the second half of the namespaced name. + jsxParseIdentifier(); +} + +// Parses element name in any form - namespaced, member +// or single identifier. +function jsxParseElementName() { + const firstTokenIndex = _base.state.tokens.length; + jsxParseNamespacedName(_index.IdentifierRole.Access); + let hadDot = false; + while (_index.match.call(void 0, _types.TokenType.dot)) { + hadDot = true; + nextJSXTagToken(); + jsxParseIdentifier(); + } + // For tags like
with a lowercase letter and no dots, the name is + // actually *not* an identifier access, since it's referring to a built-in + // tag name. Remove the identifier role in this case so that it's not + // accidentally transformed by the imports transform when preserving JSX. + if (!hadDot) { + const firstToken = _base.state.tokens[firstTokenIndex]; + const firstChar = _base.input.charCodeAt(firstToken.start); + if (firstChar >= _charcodes.charCodes.lowercaseA && firstChar <= _charcodes.charCodes.lowercaseZ) { + firstToken.identifierRole = null; + } + } +} + +// Parses any type of JSX attribute value. +function jsxParseAttributeValue() { + switch (_base.state.type) { + case _types.TokenType.braceL: + _index.next.call(void 0, ); + _expression.parseExpression.call(void 0, ); + nextJSXTagToken(); + return; + + case _types.TokenType.jsxTagStart: + jsxParseElement(); + nextJSXTagToken(); + return; + + case _types.TokenType.string: + nextJSXTagToken(); + return; + + default: + _util.unexpected.call(void 0, "JSX value should be either an expression or a quoted JSX text"); + } +} + +// Parse JSX spread child, after already processing the { +// Does not parse the closing } +function jsxParseSpreadChild() { + _util.expect.call(void 0, _types.TokenType.ellipsis); + _expression.parseExpression.call(void 0, ); +} + +// Parses JSX opening tag starting after "<". +// Returns true if the tag was self-closing. +// Does not parse the last token. +function jsxParseOpeningElement(initialTokenIndex) { + if (_index.match.call(void 0, _types.TokenType.jsxTagEnd)) { + // This is an open-fragment. + return false; + } + jsxParseElementName(); + if (_base.isTypeScriptEnabled) { + _typescript.tsTryParseJSXTypeArgument.call(void 0, ); + } + let hasSeenPropSpread = false; + while (!_index.match.call(void 0, _types.TokenType.slash) && !_index.match.call(void 0, _types.TokenType.jsxTagEnd) && !_base.state.error) { + if (_index.eat.call(void 0, _types.TokenType.braceL)) { + hasSeenPropSpread = true; + _util.expect.call(void 0, _types.TokenType.ellipsis); + _expression.parseMaybeAssign.call(void 0, ); + // } + nextJSXTagToken(); + continue; + } + if ( + hasSeenPropSpread && + _base.state.end - _base.state.start === 3 && + _base.input.charCodeAt(_base.state.start) === _charcodes.charCodes.lowercaseK && + _base.input.charCodeAt(_base.state.start + 1) === _charcodes.charCodes.lowercaseE && + _base.input.charCodeAt(_base.state.start + 2) === _charcodes.charCodes.lowercaseY + ) { + _base.state.tokens[initialTokenIndex].jsxRole = _index.JSXRole.KeyAfterPropSpread; + } + jsxParseNamespacedName(_index.IdentifierRole.ObjectKey); + if (_index.match.call(void 0, _types.TokenType.eq)) { + nextJSXTagToken(); + jsxParseAttributeValue(); + } + } + const isSelfClosing = _index.match.call(void 0, _types.TokenType.slash); + if (isSelfClosing) { + // / + nextJSXTagToken(); + } + return isSelfClosing; +} + +// Parses JSX closing tag starting after " 1) { + _base.state.tokens[initialTokenIndex].jsxRole = _index.JSXRole.StaticChildren; + } + } + return; + } + numExplicitChildren++; + jsxParseElementAt(); + nextJSXExprToken(); + break; + + case _types.TokenType.jsxText: + numExplicitChildren++; + nextJSXExprToken(); + break; + + case _types.TokenType.jsxEmptyText: + nextJSXExprToken(); + break; + + case _types.TokenType.braceL: + _index.next.call(void 0, ); + if (_index.match.call(void 0, _types.TokenType.ellipsis)) { + jsxParseSpreadChild(); + nextJSXExprToken(); + // Spread children are a mechanism to explicitly mark children as + // static, so count it as 2 children to satisfy the "more than one + // child" condition. + numExplicitChildren += 2; + } else { + // If we see {}, this is an empty pseudo-expression that doesn't + // count as a child. + if (!_index.match.call(void 0, _types.TokenType.braceR)) { + numExplicitChildren++; + _expression.parseExpression.call(void 0, ); + } + nextJSXExprToken(); + } + + break; + + // istanbul ignore next - should never happen + default: + _util.unexpected.call(void 0, ); + return; + } + } + } +} + +// Parses entire JSX element from current position. +// Does not parse the last token. + function jsxParseElement() { + nextJSXTagToken(); + jsxParseElementAt(); +} exports.jsxParseElement = jsxParseElement; + +// ================================== +// Overrides +// ================================== + + function nextJSXTagToken() { + _base.state.tokens.push(new (0, _index.Token)()); + _index.skipSpace.call(void 0, ); + _base.state.start = _base.state.pos; + const code = _base.input.charCodeAt(_base.state.pos); + + if (_identifier.IS_IDENTIFIER_START[code]) { + jsxReadWord(); + } else if (code === _charcodes.charCodes.quotationMark || code === _charcodes.charCodes.apostrophe) { + jsxReadString(code); + } else { + // The following tokens are just one character each. + ++_base.state.pos; + switch (code) { + case _charcodes.charCodes.greaterThan: + _index.finishToken.call(void 0, _types.TokenType.jsxTagEnd); + break; + case _charcodes.charCodes.lessThan: + _index.finishToken.call(void 0, _types.TokenType.jsxTagStart); + break; + case _charcodes.charCodes.slash: + _index.finishToken.call(void 0, _types.TokenType.slash); + break; + case _charcodes.charCodes.equalsTo: + _index.finishToken.call(void 0, _types.TokenType.eq); + break; + case _charcodes.charCodes.leftCurlyBrace: + _index.finishToken.call(void 0, _types.TokenType.braceL); + break; + case _charcodes.charCodes.dot: + _index.finishToken.call(void 0, _types.TokenType.dot); + break; + case _charcodes.charCodes.colon: + _index.finishToken.call(void 0, _types.TokenType.colon); + break; + default: + _util.unexpected.call(void 0, ); + } + } +} exports.nextJSXTagToken = nextJSXTagToken; + +function nextJSXExprToken() { + _base.state.tokens.push(new (0, _index.Token)()); + _base.state.start = _base.state.pos; + jsxReadToken(); +} Index: frontend/node_modules/sucrase/dist/parser/plugins/jsx/xhtml.js =================================================================== --- frontend/node_modules/sucrase/dist/parser/plugins/jsx/xhtml.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/parser/plugins/jsx/xhtml.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,256 @@ +"use strict";Object.defineProperty(exports, "__esModule", {value: true});// Use a Map rather than object to avoid unexpected __proto__ access. +exports. default = new Map([ + ["quot", "\u0022"], + ["amp", "&"], + ["apos", "\u0027"], + ["lt", "<"], + ["gt", ">"], + ["nbsp", "\u00A0"], + ["iexcl", "\u00A1"], + ["cent", "\u00A2"], + ["pound", "\u00A3"], + ["curren", "\u00A4"], + ["yen", "\u00A5"], + ["brvbar", "\u00A6"], + ["sect", "\u00A7"], + ["uml", "\u00A8"], + ["copy", "\u00A9"], + ["ordf", "\u00AA"], + ["laquo", "\u00AB"], + ["not", "\u00AC"], + ["shy", "\u00AD"], + ["reg", "\u00AE"], + ["macr", "\u00AF"], + ["deg", "\u00B0"], + ["plusmn", "\u00B1"], + ["sup2", "\u00B2"], + ["sup3", "\u00B3"], + ["acute", "\u00B4"], + ["micro", "\u00B5"], + ["para", "\u00B6"], + ["middot", "\u00B7"], + ["cedil", "\u00B8"], + ["sup1", "\u00B9"], + ["ordm", "\u00BA"], + ["raquo", "\u00BB"], + ["frac14", "\u00BC"], + ["frac12", "\u00BD"], + ["frac34", "\u00BE"], + ["iquest", "\u00BF"], + ["Agrave", "\u00C0"], + ["Aacute", "\u00C1"], + ["Acirc", "\u00C2"], + ["Atilde", "\u00C3"], + ["Auml", "\u00C4"], + ["Aring", "\u00C5"], + ["AElig", "\u00C6"], + ["Ccedil", "\u00C7"], + ["Egrave", "\u00C8"], + ["Eacute", "\u00C9"], + ["Ecirc", "\u00CA"], + ["Euml", "\u00CB"], + ["Igrave", "\u00CC"], + ["Iacute", "\u00CD"], + ["Icirc", "\u00CE"], + ["Iuml", "\u00CF"], + ["ETH", "\u00D0"], + ["Ntilde", "\u00D1"], + ["Ograve", "\u00D2"], + ["Oacute", "\u00D3"], + ["Ocirc", "\u00D4"], + ["Otilde", "\u00D5"], + ["Ouml", "\u00D6"], + ["times", "\u00D7"], + ["Oslash", "\u00D8"], + ["Ugrave", "\u00D9"], + ["Uacute", "\u00DA"], + ["Ucirc", "\u00DB"], + ["Uuml", "\u00DC"], + ["Yacute", "\u00DD"], + ["THORN", "\u00DE"], + ["szlig", "\u00DF"], + ["agrave", "\u00E0"], + ["aacute", "\u00E1"], + ["acirc", "\u00E2"], + ["atilde", "\u00E3"], + ["auml", "\u00E4"], + ["aring", "\u00E5"], + ["aelig", "\u00E6"], + ["ccedil", "\u00E7"], + ["egrave", "\u00E8"], + ["eacute", "\u00E9"], + ["ecirc", "\u00EA"], + ["euml", "\u00EB"], + ["igrave", "\u00EC"], + ["iacute", "\u00ED"], + ["icirc", "\u00EE"], + ["iuml", "\u00EF"], + ["eth", "\u00F0"], + ["ntilde", "\u00F1"], + ["ograve", "\u00F2"], + ["oacute", "\u00F3"], + ["ocirc", "\u00F4"], + ["otilde", "\u00F5"], + ["ouml", "\u00F6"], + ["divide", "\u00F7"], + ["oslash", "\u00F8"], + ["ugrave", "\u00F9"], + ["uacute", "\u00FA"], + ["ucirc", "\u00FB"], + ["uuml", "\u00FC"], + ["yacute", "\u00FD"], + ["thorn", "\u00FE"], + ["yuml", "\u00FF"], + ["OElig", "\u0152"], + ["oelig", "\u0153"], + ["Scaron", "\u0160"], + ["scaron", "\u0161"], + ["Yuml", "\u0178"], + ["fnof", "\u0192"], + ["circ", "\u02C6"], + ["tilde", "\u02DC"], + ["Alpha", "\u0391"], + ["Beta", "\u0392"], + ["Gamma", "\u0393"], + ["Delta", "\u0394"], + ["Epsilon", "\u0395"], + ["Zeta", "\u0396"], + ["Eta", "\u0397"], + ["Theta", "\u0398"], + ["Iota", "\u0399"], + ["Kappa", "\u039A"], + ["Lambda", "\u039B"], + ["Mu", "\u039C"], + ["Nu", "\u039D"], + ["Xi", "\u039E"], + ["Omicron", "\u039F"], + ["Pi", "\u03A0"], + ["Rho", "\u03A1"], + ["Sigma", "\u03A3"], + ["Tau", "\u03A4"], + ["Upsilon", "\u03A5"], + ["Phi", "\u03A6"], + ["Chi", "\u03A7"], + ["Psi", "\u03A8"], + ["Omega", "\u03A9"], + ["alpha", "\u03B1"], + ["beta", "\u03B2"], + ["gamma", "\u03B3"], + ["delta", "\u03B4"], + ["epsilon", "\u03B5"], + ["zeta", "\u03B6"], + ["eta", "\u03B7"], + ["theta", "\u03B8"], + ["iota", "\u03B9"], + ["kappa", "\u03BA"], + ["lambda", "\u03BB"], + ["mu", "\u03BC"], + ["nu", "\u03BD"], + ["xi", "\u03BE"], + ["omicron", "\u03BF"], + ["pi", "\u03C0"], + ["rho", "\u03C1"], + ["sigmaf", "\u03C2"], + ["sigma", "\u03C3"], + ["tau", "\u03C4"], + ["upsilon", "\u03C5"], + ["phi", "\u03C6"], + ["chi", "\u03C7"], + ["psi", "\u03C8"], + ["omega", "\u03C9"], + ["thetasym", "\u03D1"], + ["upsih", "\u03D2"], + ["piv", "\u03D6"], + ["ensp", "\u2002"], + ["emsp", "\u2003"], + ["thinsp", "\u2009"], + ["zwnj", "\u200C"], + ["zwj", "\u200D"], + ["lrm", "\u200E"], + ["rlm", "\u200F"], + ["ndash", "\u2013"], + ["mdash", "\u2014"], + ["lsquo", "\u2018"], + ["rsquo", "\u2019"], + ["sbquo", "\u201A"], + ["ldquo", "\u201C"], + ["rdquo", "\u201D"], + ["bdquo", "\u201E"], + ["dagger", "\u2020"], + ["Dagger", "\u2021"], + ["bull", "\u2022"], + ["hellip", "\u2026"], + ["permil", "\u2030"], + ["prime", "\u2032"], + ["Prime", "\u2033"], + ["lsaquo", "\u2039"], + ["rsaquo", "\u203A"], + ["oline", "\u203E"], + ["frasl", "\u2044"], + ["euro", "\u20AC"], + ["image", "\u2111"], + ["weierp", "\u2118"], + ["real", "\u211C"], + ["trade", "\u2122"], + ["alefsym", "\u2135"], + ["larr", "\u2190"], + ["uarr", "\u2191"], + ["rarr", "\u2192"], + ["darr", "\u2193"], + ["harr", "\u2194"], + ["crarr", "\u21B5"], + ["lArr", "\u21D0"], + ["uArr", "\u21D1"], + ["rArr", "\u21D2"], + ["dArr", "\u21D3"], + ["hArr", "\u21D4"], + ["forall", "\u2200"], + ["part", "\u2202"], + ["exist", "\u2203"], + ["empty", "\u2205"], + ["nabla", "\u2207"], + ["isin", "\u2208"], + ["notin", "\u2209"], + ["ni", "\u220B"], + ["prod", "\u220F"], + ["sum", "\u2211"], + ["minus", "\u2212"], + ["lowast", "\u2217"], + ["radic", "\u221A"], + ["prop", "\u221D"], + ["infin", "\u221E"], + ["ang", "\u2220"], + ["and", "\u2227"], + ["or", "\u2228"], + ["cap", "\u2229"], + ["cup", "\u222A"], + ["int", "\u222B"], + ["there4", "\u2234"], + ["sim", "\u223C"], + ["cong", "\u2245"], + ["asymp", "\u2248"], + ["ne", "\u2260"], + ["equiv", "\u2261"], + ["le", "\u2264"], + ["ge", "\u2265"], + ["sub", "\u2282"], + ["sup", "\u2283"], + ["nsub", "\u2284"], + ["sube", "\u2286"], + ["supe", "\u2287"], + ["oplus", "\u2295"], + ["otimes", "\u2297"], + ["perp", "\u22A5"], + ["sdot", "\u22C5"], + ["lceil", "\u2308"], + ["rceil", "\u2309"], + ["lfloor", "\u230A"], + ["rfloor", "\u230B"], + ["lang", "\u2329"], + ["rang", "\u232A"], + ["loz", "\u25CA"], + ["spades", "\u2660"], + ["clubs", "\u2663"], + ["hearts", "\u2665"], + ["diams", "\u2666"], +]); Index: frontend/node_modules/sucrase/dist/parser/plugins/types.js =================================================================== --- frontend/node_modules/sucrase/dist/parser/plugins/types.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/parser/plugins/types.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,37 @@ +"use strict";Object.defineProperty(exports, "__esModule", {value: true});var _index = require('../tokenizer/index'); +var _types = require('../tokenizer/types'); +var _base = require('../traverser/base'); +var _expression = require('../traverser/expression'); +var _flow = require('./flow'); +var _typescript = require('./typescript'); + +/** + * Common parser code for TypeScript and Flow. + */ + +// An apparent conditional expression could actually be an optional parameter in an arrow function. + function typedParseConditional(noIn) { + // If we see ?:, this can't possibly be a valid conditional. typedParseParenItem will be called + // later to finish off the arrow parameter. We also need to handle bare ? tokens for optional + // parameters without type annotations, i.e. ?, and ?) . + if (_index.match.call(void 0, _types.TokenType.question)) { + const nextType = _index.lookaheadType.call(void 0, ); + if (nextType === _types.TokenType.colon || nextType === _types.TokenType.comma || nextType === _types.TokenType.parenR) { + return; + } + } + _expression.baseParseConditional.call(void 0, noIn); +} exports.typedParseConditional = typedParseConditional; + +// Note: These "type casts" are *not* valid TS expressions. +// But we parse them here and change them when completing the arrow function. + function typedParseParenItem() { + _index.eatTypeToken.call(void 0, _types.TokenType.question); + if (_index.match.call(void 0, _types.TokenType.colon)) { + if (_base.isTypeScriptEnabled) { + _typescript.tsParseTypeAnnotation.call(void 0, ); + } else if (_base.isFlowEnabled) { + _flow.flowParseTypeAnnotation.call(void 0, ); + } + } +} exports.typedParseParenItem = typedParseParenItem; Index: frontend/node_modules/sucrase/dist/parser/plugins/typescript.js =================================================================== --- frontend/node_modules/sucrase/dist/parser/plugins/typescript.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/parser/plugins/typescript.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,1632 @@ +"use strict";Object.defineProperty(exports, "__esModule", {value: true}); + + + + + + + + + + + +var _index = require('../tokenizer/index'); +var _keywords = require('../tokenizer/keywords'); +var _types = require('../tokenizer/types'); +var _base = require('../traverser/base'); + + + + + + + + + + + + + + + +var _expression = require('../traverser/expression'); +var _lval = require('../traverser/lval'); + + + + + + + + +var _statement = require('../traverser/statement'); + + + + + + + + + + + +var _util = require('../traverser/util'); +var _jsx = require('./jsx'); + +function tsIsIdentifier() { + // TODO: actually a bit more complex in TypeScript, but shouldn't matter. + // See https://github.com/Microsoft/TypeScript/issues/15008 + return _index.match.call(void 0, _types.TokenType.name); +} + +function isLiteralPropertyName() { + return ( + _index.match.call(void 0, _types.TokenType.name) || + Boolean(_base.state.type & _types.TokenType.IS_KEYWORD) || + _index.match.call(void 0, _types.TokenType.string) || + _index.match.call(void 0, _types.TokenType.num) || + _index.match.call(void 0, _types.TokenType.bigint) || + _index.match.call(void 0, _types.TokenType.decimal) + ); +} + +function tsNextTokenCanFollowModifier() { + // Note: TypeScript's implementation is much more complicated because + // more things are considered modifiers there. + // This implementation only handles modifiers not handled by babylon itself. And "static". + // TODO: Would be nice to avoid lookahead. Want a hasLineBreakUpNext() method... + const snapshot = _base.state.snapshot(); + + _index.next.call(void 0, ); + const canFollowModifier = + (_index.match.call(void 0, _types.TokenType.bracketL) || + _index.match.call(void 0, _types.TokenType.braceL) || + _index.match.call(void 0, _types.TokenType.star) || + _index.match.call(void 0, _types.TokenType.ellipsis) || + _index.match.call(void 0, _types.TokenType.hash) || + isLiteralPropertyName()) && + !_util.hasPrecedingLineBreak.call(void 0, ); + + if (canFollowModifier) { + return true; + } else { + _base.state.restoreFromSnapshot(snapshot); + return false; + } +} + + function tsParseModifiers(allowedModifiers) { + while (true) { + const modifier = tsParseModifier(allowedModifiers); + if (modifier === null) { + break; + } + } +} exports.tsParseModifiers = tsParseModifiers; + +/** Parses a modifier matching one the given modifier names. */ + function tsParseModifier( + allowedModifiers, +) { + if (!_index.match.call(void 0, _types.TokenType.name)) { + return null; + } + + const modifier = _base.state.contextualKeyword; + if (allowedModifiers.indexOf(modifier) !== -1 && tsNextTokenCanFollowModifier()) { + switch (modifier) { + case _keywords.ContextualKeyword._readonly: + _base.state.tokens[_base.state.tokens.length - 1].type = _types.TokenType._readonly; + break; + case _keywords.ContextualKeyword._abstract: + _base.state.tokens[_base.state.tokens.length - 1].type = _types.TokenType._abstract; + break; + case _keywords.ContextualKeyword._static: + _base.state.tokens[_base.state.tokens.length - 1].type = _types.TokenType._static; + break; + case _keywords.ContextualKeyword._public: + _base.state.tokens[_base.state.tokens.length - 1].type = _types.TokenType._public; + break; + case _keywords.ContextualKeyword._private: + _base.state.tokens[_base.state.tokens.length - 1].type = _types.TokenType._private; + break; + case _keywords.ContextualKeyword._protected: + _base.state.tokens[_base.state.tokens.length - 1].type = _types.TokenType._protected; + break; + case _keywords.ContextualKeyword._override: + _base.state.tokens[_base.state.tokens.length - 1].type = _types.TokenType._override; + break; + case _keywords.ContextualKeyword._declare: + _base.state.tokens[_base.state.tokens.length - 1].type = _types.TokenType._declare; + break; + default: + break; + } + return modifier; + } + return null; +} exports.tsParseModifier = tsParseModifier; + +function tsParseEntityName() { + _expression.parseIdentifier.call(void 0, ); + while (_index.eat.call(void 0, _types.TokenType.dot)) { + _expression.parseIdentifier.call(void 0, ); + } +} + +function tsParseTypeReference() { + tsParseEntityName(); + if (!_util.hasPrecedingLineBreak.call(void 0, ) && _index.match.call(void 0, _types.TokenType.lessThan)) { + tsParseTypeArguments(); + } +} + +function tsParseThisTypePredicate() { + _index.next.call(void 0, ); + tsParseTypeAnnotation(); +} + +function tsParseThisTypeNode() { + _index.next.call(void 0, ); +} + +function tsParseTypeQuery() { + _util.expect.call(void 0, _types.TokenType._typeof); + if (_index.match.call(void 0, _types.TokenType._import)) { + tsParseImportType(); + } else { + tsParseEntityName(); + } + if (!_util.hasPrecedingLineBreak.call(void 0, ) && _index.match.call(void 0, _types.TokenType.lessThan)) { + tsParseTypeArguments(); + } +} + +function tsParseImportType() { + _util.expect.call(void 0, _types.TokenType._import); + _util.expect.call(void 0, _types.TokenType.parenL); + _util.expect.call(void 0, _types.TokenType.string); + _util.expect.call(void 0, _types.TokenType.parenR); + if (_index.eat.call(void 0, _types.TokenType.dot)) { + tsParseEntityName(); + } + if (_index.match.call(void 0, _types.TokenType.lessThan)) { + tsParseTypeArguments(); + } +} + +function tsParseTypeParameter() { + _index.eat.call(void 0, _types.TokenType._const); + const hadIn = _index.eat.call(void 0, _types.TokenType._in); + const hadOut = _util.eatContextual.call(void 0, _keywords.ContextualKeyword._out); + _index.eat.call(void 0, _types.TokenType._const); + if ((hadIn || hadOut) && !_index.match.call(void 0, _types.TokenType.name)) { + // The "in" or "out" keyword must have actually been the type parameter + // name, so set it as the name. + _base.state.tokens[_base.state.tokens.length - 1].type = _types.TokenType.name; + } else { + _expression.parseIdentifier.call(void 0, ); + } + + if (_index.eat.call(void 0, _types.TokenType._extends)) { + tsParseType(); + } + if (_index.eat.call(void 0, _types.TokenType.eq)) { + tsParseType(); + } +} + + function tsTryParseTypeParameters() { + if (_index.match.call(void 0, _types.TokenType.lessThan)) { + tsParseTypeParameters(); + } +} exports.tsTryParseTypeParameters = tsTryParseTypeParameters; + +function tsParseTypeParameters() { + const oldIsType = _index.pushTypeContext.call(void 0, 0); + if (_index.match.call(void 0, _types.TokenType.lessThan) || _index.match.call(void 0, _types.TokenType.typeParameterStart)) { + _index.next.call(void 0, ); + } else { + _util.unexpected.call(void 0, ); + } + + while (!_index.eat.call(void 0, _types.TokenType.greaterThan) && !_base.state.error) { + tsParseTypeParameter(); + _index.eat.call(void 0, _types.TokenType.comma); + } + _index.popTypeContext.call(void 0, oldIsType); +} + +// Note: In TypeScript implementation we must provide `yieldContext` and `awaitContext`, +// but here it's always false, because this is only used for types. +function tsFillSignature(returnToken) { + // Arrow fns *must* have return token (`=>`). Normal functions can omit it. + const returnTokenRequired = returnToken === _types.TokenType.arrow; + tsTryParseTypeParameters(); + _util.expect.call(void 0, _types.TokenType.parenL); + // Create a scope even though we're doing type parsing so we don't accidentally + // treat params as top-level bindings. + _base.state.scopeDepth++; + tsParseBindingListForSignature(false /* isBlockScope */); + _base.state.scopeDepth--; + if (returnTokenRequired) { + tsParseTypeOrTypePredicateAnnotation(returnToken); + } else if (_index.match.call(void 0, returnToken)) { + tsParseTypeOrTypePredicateAnnotation(returnToken); + } +} + +function tsParseBindingListForSignature(isBlockScope) { + _lval.parseBindingList.call(void 0, _types.TokenType.parenR, isBlockScope); +} + +function tsParseTypeMemberSemicolon() { + if (!_index.eat.call(void 0, _types.TokenType.comma)) { + _util.semicolon.call(void 0, ); + } +} + +function tsParseSignatureMember() { + tsFillSignature(_types.TokenType.colon); + tsParseTypeMemberSemicolon(); +} + +function tsIsUnambiguouslyIndexSignature() { + const snapshot = _base.state.snapshot(); + _index.next.call(void 0, ); // Skip '{' + const isIndexSignature = _index.eat.call(void 0, _types.TokenType.name) && _index.match.call(void 0, _types.TokenType.colon); + _base.state.restoreFromSnapshot(snapshot); + return isIndexSignature; +} + +function tsTryParseIndexSignature() { + if (!(_index.match.call(void 0, _types.TokenType.bracketL) && tsIsUnambiguouslyIndexSignature())) { + return false; + } + + const oldIsType = _index.pushTypeContext.call(void 0, 0); + + _util.expect.call(void 0, _types.TokenType.bracketL); + _expression.parseIdentifier.call(void 0, ); + tsParseTypeAnnotation(); + _util.expect.call(void 0, _types.TokenType.bracketR); + + tsTryParseTypeAnnotation(); + tsParseTypeMemberSemicolon(); + + _index.popTypeContext.call(void 0, oldIsType); + return true; +} + +function tsParsePropertyOrMethodSignature(isReadonly) { + _index.eat.call(void 0, _types.TokenType.question); + + if (!isReadonly && (_index.match.call(void 0, _types.TokenType.parenL) || _index.match.call(void 0, _types.TokenType.lessThan))) { + tsFillSignature(_types.TokenType.colon); + tsParseTypeMemberSemicolon(); + } else { + tsTryParseTypeAnnotation(); + tsParseTypeMemberSemicolon(); + } +} + +function tsParseTypeMember() { + if (_index.match.call(void 0, _types.TokenType.parenL) || _index.match.call(void 0, _types.TokenType.lessThan)) { + // call signature + tsParseSignatureMember(); + return; + } + if (_index.match.call(void 0, _types.TokenType._new)) { + _index.next.call(void 0, ); + if (_index.match.call(void 0, _types.TokenType.parenL) || _index.match.call(void 0, _types.TokenType.lessThan)) { + // constructor signature + tsParseSignatureMember(); + } else { + tsParsePropertyOrMethodSignature(false); + } + return; + } + const readonly = !!tsParseModifier([_keywords.ContextualKeyword._readonly]); + + const found = tsTryParseIndexSignature(); + if (found) { + return; + } + if ( + (_util.isContextual.call(void 0, _keywords.ContextualKeyword._get) || _util.isContextual.call(void 0, _keywords.ContextualKeyword._set)) && + tsNextTokenCanFollowModifier() + ) { + // This is a getter/setter on a type. The tsNextTokenCanFollowModifier + // function already called next() for us, so continue parsing the name. + } + _expression.parsePropertyName.call(void 0, -1 /* Types don't need context IDs. */); + tsParsePropertyOrMethodSignature(readonly); +} + +function tsParseTypeLiteral() { + tsParseObjectTypeMembers(); +} + +function tsParseObjectTypeMembers() { + _util.expect.call(void 0, _types.TokenType.braceL); + while (!_index.eat.call(void 0, _types.TokenType.braceR) && !_base.state.error) { + tsParseTypeMember(); + } +} + +function tsLookaheadIsStartOfMappedType() { + const snapshot = _base.state.snapshot(); + const isStartOfMappedType = tsIsStartOfMappedType(); + _base.state.restoreFromSnapshot(snapshot); + return isStartOfMappedType; +} + +function tsIsStartOfMappedType() { + _index.next.call(void 0, ); + if (_index.eat.call(void 0, _types.TokenType.plus) || _index.eat.call(void 0, _types.TokenType.minus)) { + return _util.isContextual.call(void 0, _keywords.ContextualKeyword._readonly); + } + if (_util.isContextual.call(void 0, _keywords.ContextualKeyword._readonly)) { + _index.next.call(void 0, ); + } + if (!_index.match.call(void 0, _types.TokenType.bracketL)) { + return false; + } + _index.next.call(void 0, ); + if (!tsIsIdentifier()) { + return false; + } + _index.next.call(void 0, ); + return _index.match.call(void 0, _types.TokenType._in); +} + +function tsParseMappedTypeParameter() { + _expression.parseIdentifier.call(void 0, ); + _util.expect.call(void 0, _types.TokenType._in); + tsParseType(); +} + +function tsParseMappedType() { + _util.expect.call(void 0, _types.TokenType.braceL); + if (_index.match.call(void 0, _types.TokenType.plus) || _index.match.call(void 0, _types.TokenType.minus)) { + _index.next.call(void 0, ); + _util.expectContextual.call(void 0, _keywords.ContextualKeyword._readonly); + } else { + _util.eatContextual.call(void 0, _keywords.ContextualKeyword._readonly); + } + _util.expect.call(void 0, _types.TokenType.bracketL); + tsParseMappedTypeParameter(); + if (_util.eatContextual.call(void 0, _keywords.ContextualKeyword._as)) { + tsParseType(); + } + _util.expect.call(void 0, _types.TokenType.bracketR); + if (_index.match.call(void 0, _types.TokenType.plus) || _index.match.call(void 0, _types.TokenType.minus)) { + _index.next.call(void 0, ); + _util.expect.call(void 0, _types.TokenType.question); + } else { + _index.eat.call(void 0, _types.TokenType.question); + } + tsTryParseType(); + _util.semicolon.call(void 0, ); + _util.expect.call(void 0, _types.TokenType.braceR); +} + +function tsParseTupleType() { + _util.expect.call(void 0, _types.TokenType.bracketL); + while (!_index.eat.call(void 0, _types.TokenType.bracketR) && !_base.state.error) { + // Do not validate presence of either none or only labeled elements + tsParseTupleElementType(); + _index.eat.call(void 0, _types.TokenType.comma); + } +} + +function tsParseTupleElementType() { + // parses `...TsType[]` + if (_index.eat.call(void 0, _types.TokenType.ellipsis)) { + tsParseType(); + } else { + // parses `TsType?` + tsParseType(); + _index.eat.call(void 0, _types.TokenType.question); + } + + // The type we parsed above was actually a label + if (_index.eat.call(void 0, _types.TokenType.colon)) { + // Labeled tuple types must affix the label with `...` or `?`, so no need to handle those here + tsParseType(); + } +} + +function tsParseParenthesizedType() { + _util.expect.call(void 0, _types.TokenType.parenL); + tsParseType(); + _util.expect.call(void 0, _types.TokenType.parenR); +} + +function tsParseTemplateLiteralType() { + // Finish `, read quasi + _index.nextTemplateToken.call(void 0, ); + // Finish quasi, read ${ + _index.nextTemplateToken.call(void 0, ); + while (!_index.match.call(void 0, _types.TokenType.backQuote) && !_base.state.error) { + _util.expect.call(void 0, _types.TokenType.dollarBraceL); + tsParseType(); + // Finish }, read quasi + _index.nextTemplateToken.call(void 0, ); + // Finish quasi, read either ${ or ` + _index.nextTemplateToken.call(void 0, ); + } + _index.next.call(void 0, ); +} + +var FunctionType; (function (FunctionType) { + const TSFunctionType = 0; FunctionType[FunctionType["TSFunctionType"] = TSFunctionType] = "TSFunctionType"; + const TSConstructorType = TSFunctionType + 1; FunctionType[FunctionType["TSConstructorType"] = TSConstructorType] = "TSConstructorType"; + const TSAbstractConstructorType = TSConstructorType + 1; FunctionType[FunctionType["TSAbstractConstructorType"] = TSAbstractConstructorType] = "TSAbstractConstructorType"; +})(FunctionType || (FunctionType = {})); + +function tsParseFunctionOrConstructorType(type) { + if (type === FunctionType.TSAbstractConstructorType) { + _util.expectContextual.call(void 0, _keywords.ContextualKeyword._abstract); + } + if (type === FunctionType.TSConstructorType || type === FunctionType.TSAbstractConstructorType) { + _util.expect.call(void 0, _types.TokenType._new); + } + const oldInDisallowConditionalTypesContext = _base.state.inDisallowConditionalTypesContext; + _base.state.inDisallowConditionalTypesContext = false; + tsFillSignature(_types.TokenType.arrow); + _base.state.inDisallowConditionalTypesContext = oldInDisallowConditionalTypesContext; +} + +function tsParseNonArrayType() { + switch (_base.state.type) { + case _types.TokenType.name: + tsParseTypeReference(); + return; + case _types.TokenType._void: + case _types.TokenType._null: + _index.next.call(void 0, ); + return; + case _types.TokenType.string: + case _types.TokenType.num: + case _types.TokenType.bigint: + case _types.TokenType.decimal: + case _types.TokenType._true: + case _types.TokenType._false: + _expression.parseLiteral.call(void 0, ); + return; + case _types.TokenType.minus: + _index.next.call(void 0, ); + _expression.parseLiteral.call(void 0, ); + return; + case _types.TokenType._this: { + tsParseThisTypeNode(); + if (_util.isContextual.call(void 0, _keywords.ContextualKeyword._is) && !_util.hasPrecedingLineBreak.call(void 0, )) { + tsParseThisTypePredicate(); + } + return; + } + case _types.TokenType._typeof: + tsParseTypeQuery(); + return; + case _types.TokenType._import: + tsParseImportType(); + return; + case _types.TokenType.braceL: + if (tsLookaheadIsStartOfMappedType()) { + tsParseMappedType(); + } else { + tsParseTypeLiteral(); + } + return; + case _types.TokenType.bracketL: + tsParseTupleType(); + return; + case _types.TokenType.parenL: + tsParseParenthesizedType(); + return; + case _types.TokenType.backQuote: + tsParseTemplateLiteralType(); + return; + default: + if (_base.state.type & _types.TokenType.IS_KEYWORD) { + _index.next.call(void 0, ); + _base.state.tokens[_base.state.tokens.length - 1].type = _types.TokenType.name; + return; + } + break; + } + + _util.unexpected.call(void 0, ); +} + +function tsParseArrayTypeOrHigher() { + tsParseNonArrayType(); + while (!_util.hasPrecedingLineBreak.call(void 0, ) && _index.eat.call(void 0, _types.TokenType.bracketL)) { + if (!_index.eat.call(void 0, _types.TokenType.bracketR)) { + // If we hit ] immediately, this is an array type, otherwise it's an indexed access type. + tsParseType(); + _util.expect.call(void 0, _types.TokenType.bracketR); + } + } +} + +function tsParseInferType() { + _util.expectContextual.call(void 0, _keywords.ContextualKeyword._infer); + _expression.parseIdentifier.call(void 0, ); + if (_index.match.call(void 0, _types.TokenType._extends)) { + // Infer type constraints introduce an ambiguity about whether the "extends" + // is a constraint for this infer type or is another conditional type. + const snapshot = _base.state.snapshot(); + _util.expect.call(void 0, _types.TokenType._extends); + const oldInDisallowConditionalTypesContext = _base.state.inDisallowConditionalTypesContext; + _base.state.inDisallowConditionalTypesContext = true; + tsParseType(); + _base.state.inDisallowConditionalTypesContext = oldInDisallowConditionalTypesContext; + if (_base.state.error || (!_base.state.inDisallowConditionalTypesContext && _index.match.call(void 0, _types.TokenType.question))) { + _base.state.restoreFromSnapshot(snapshot); + } + } +} + +function tsParseTypeOperatorOrHigher() { + if ( + _util.isContextual.call(void 0, _keywords.ContextualKeyword._keyof) || + _util.isContextual.call(void 0, _keywords.ContextualKeyword._unique) || + _util.isContextual.call(void 0, _keywords.ContextualKeyword._readonly) + ) { + _index.next.call(void 0, ); + tsParseTypeOperatorOrHigher(); + } else if (_util.isContextual.call(void 0, _keywords.ContextualKeyword._infer)) { + tsParseInferType(); + } else { + const oldInDisallowConditionalTypesContext = _base.state.inDisallowConditionalTypesContext; + _base.state.inDisallowConditionalTypesContext = false; + tsParseArrayTypeOrHigher(); + _base.state.inDisallowConditionalTypesContext = oldInDisallowConditionalTypesContext; + } +} + +function tsParseIntersectionTypeOrHigher() { + _index.eat.call(void 0, _types.TokenType.bitwiseAND); + tsParseTypeOperatorOrHigher(); + if (_index.match.call(void 0, _types.TokenType.bitwiseAND)) { + while (_index.eat.call(void 0, _types.TokenType.bitwiseAND)) { + tsParseTypeOperatorOrHigher(); + } + } +} + +function tsParseUnionTypeOrHigher() { + _index.eat.call(void 0, _types.TokenType.bitwiseOR); + tsParseIntersectionTypeOrHigher(); + if (_index.match.call(void 0, _types.TokenType.bitwiseOR)) { + while (_index.eat.call(void 0, _types.TokenType.bitwiseOR)) { + tsParseIntersectionTypeOrHigher(); + } + } +} + +function tsIsStartOfFunctionType() { + if (_index.match.call(void 0, _types.TokenType.lessThan)) { + return true; + } + return _index.match.call(void 0, _types.TokenType.parenL) && tsLookaheadIsUnambiguouslyStartOfFunctionType(); +} + +function tsSkipParameterStart() { + if (_index.match.call(void 0, _types.TokenType.name) || _index.match.call(void 0, _types.TokenType._this)) { + _index.next.call(void 0, ); + return true; + } + // If this is a possible array/object destructure, walk to the matching bracket/brace. + // The next token after will tell us definitively whether this is a function param. + if (_index.match.call(void 0, _types.TokenType.braceL) || _index.match.call(void 0, _types.TokenType.bracketL)) { + let depth = 1; + _index.next.call(void 0, ); + while (depth > 0 && !_base.state.error) { + if (_index.match.call(void 0, _types.TokenType.braceL) || _index.match.call(void 0, _types.TokenType.bracketL)) { + depth++; + } else if (_index.match.call(void 0, _types.TokenType.braceR) || _index.match.call(void 0, _types.TokenType.bracketR)) { + depth--; + } + _index.next.call(void 0, ); + } + return true; + } + return false; +} + +function tsLookaheadIsUnambiguouslyStartOfFunctionType() { + const snapshot = _base.state.snapshot(); + const isUnambiguouslyStartOfFunctionType = tsIsUnambiguouslyStartOfFunctionType(); + _base.state.restoreFromSnapshot(snapshot); + return isUnambiguouslyStartOfFunctionType; +} + +function tsIsUnambiguouslyStartOfFunctionType() { + _index.next.call(void 0, ); + if (_index.match.call(void 0, _types.TokenType.parenR) || _index.match.call(void 0, _types.TokenType.ellipsis)) { + // ( ) + // ( ... + return true; + } + if (tsSkipParameterStart()) { + if (_index.match.call(void 0, _types.TokenType.colon) || _index.match.call(void 0, _types.TokenType.comma) || _index.match.call(void 0, _types.TokenType.question) || _index.match.call(void 0, _types.TokenType.eq)) { + // ( xxx : + // ( xxx , + // ( xxx ? + // ( xxx = + return true; + } + if (_index.match.call(void 0, _types.TokenType.parenR)) { + _index.next.call(void 0, ); + if (_index.match.call(void 0, _types.TokenType.arrow)) { + // ( xxx ) => + return true; + } + } + } + return false; +} + +function tsParseTypeOrTypePredicateAnnotation(returnToken) { + const oldIsType = _index.pushTypeContext.call(void 0, 0); + _util.expect.call(void 0, returnToken); + const finishedReturn = tsParseTypePredicateOrAssertsPrefix(); + if (!finishedReturn) { + tsParseType(); + } + _index.popTypeContext.call(void 0, oldIsType); +} + +function tsTryParseTypeOrTypePredicateAnnotation() { + if (_index.match.call(void 0, _types.TokenType.colon)) { + tsParseTypeOrTypePredicateAnnotation(_types.TokenType.colon); + } +} + + function tsTryParseTypeAnnotation() { + if (_index.match.call(void 0, _types.TokenType.colon)) { + tsParseTypeAnnotation(); + } +} exports.tsTryParseTypeAnnotation = tsTryParseTypeAnnotation; + +function tsTryParseType() { + if (_index.eat.call(void 0, _types.TokenType.colon)) { + tsParseType(); + } +} + +/** + * Detect a few special return syntax cases: `x is T`, `asserts x`, `asserts x is T`, + * `asserts this is T`. + * + * Returns true if we parsed the return type, false if there's still a type to be parsed. + */ +function tsParseTypePredicateOrAssertsPrefix() { + const snapshot = _base.state.snapshot(); + if (_util.isContextual.call(void 0, _keywords.ContextualKeyword._asserts)) { + // Normally this is `asserts x is T`, but at this point, it might be `asserts is T` (a user- + // defined type guard on the `asserts` variable) or just a type called `asserts`. + _index.next.call(void 0, ); + if (_util.eatContextual.call(void 0, _keywords.ContextualKeyword._is)) { + // If we see `asserts is`, then this must be of the form `asserts is T`, since + // `asserts is is T` isn't valid. + tsParseType(); + return true; + } else if (tsIsIdentifier() || _index.match.call(void 0, _types.TokenType._this)) { + _index.next.call(void 0, ); + if (_util.eatContextual.call(void 0, _keywords.ContextualKeyword._is)) { + // If we see `is`, then this is `asserts x is T`. Otherwise, it's `asserts x`. + tsParseType(); + } + return true; + } else { + // Regular type, so bail out and start type parsing from scratch. + _base.state.restoreFromSnapshot(snapshot); + return false; + } + } else if (tsIsIdentifier() || _index.match.call(void 0, _types.TokenType._this)) { + // This is a regular identifier, which may or may not have "is" after it. + _index.next.call(void 0, ); + if (_util.isContextual.call(void 0, _keywords.ContextualKeyword._is) && !_util.hasPrecedingLineBreak.call(void 0, )) { + _index.next.call(void 0, ); + tsParseType(); + return true; + } else { + // Regular type, so bail out and start type parsing from scratch. + _base.state.restoreFromSnapshot(snapshot); + return false; + } + } + return false; +} + + function tsParseTypeAnnotation() { + const oldIsType = _index.pushTypeContext.call(void 0, 0); + _util.expect.call(void 0, _types.TokenType.colon); + tsParseType(); + _index.popTypeContext.call(void 0, oldIsType); +} exports.tsParseTypeAnnotation = tsParseTypeAnnotation; + + function tsParseType() { + tsParseNonConditionalType(); + if (_base.state.inDisallowConditionalTypesContext || _util.hasPrecedingLineBreak.call(void 0, ) || !_index.eat.call(void 0, _types.TokenType._extends)) { + return; + } + // extends type + const oldInDisallowConditionalTypesContext = _base.state.inDisallowConditionalTypesContext; + _base.state.inDisallowConditionalTypesContext = true; + tsParseNonConditionalType(); + _base.state.inDisallowConditionalTypesContext = oldInDisallowConditionalTypesContext; + + _util.expect.call(void 0, _types.TokenType.question); + // true type + tsParseType(); + _util.expect.call(void 0, _types.TokenType.colon); + // false type + tsParseType(); +} exports.tsParseType = tsParseType; + +function isAbstractConstructorSignature() { + return _util.isContextual.call(void 0, _keywords.ContextualKeyword._abstract) && _index.lookaheadType.call(void 0, ) === _types.TokenType._new; +} + + function tsParseNonConditionalType() { + if (tsIsStartOfFunctionType()) { + tsParseFunctionOrConstructorType(FunctionType.TSFunctionType); + return; + } + if (_index.match.call(void 0, _types.TokenType._new)) { + // As in `new () => Date` + tsParseFunctionOrConstructorType(FunctionType.TSConstructorType); + return; + } else if (isAbstractConstructorSignature()) { + // As in `abstract new () => Date` + tsParseFunctionOrConstructorType(FunctionType.TSAbstractConstructorType); + return; + } + tsParseUnionTypeOrHigher(); +} exports.tsParseNonConditionalType = tsParseNonConditionalType; + + function tsParseTypeAssertion() { + const oldIsType = _index.pushTypeContext.call(void 0, 1); + tsParseType(); + _util.expect.call(void 0, _types.TokenType.greaterThan); + _index.popTypeContext.call(void 0, oldIsType); + _expression.parseMaybeUnary.call(void 0, ); +} exports.tsParseTypeAssertion = tsParseTypeAssertion; + + function tsTryParseJSXTypeArgument() { + if (_index.eat.call(void 0, _types.TokenType.jsxTagStart)) { + _base.state.tokens[_base.state.tokens.length - 1].type = _types.TokenType.typeParameterStart; + const oldIsType = _index.pushTypeContext.call(void 0, 1); + while (!_index.match.call(void 0, _types.TokenType.greaterThan) && !_base.state.error) { + tsParseType(); + _index.eat.call(void 0, _types.TokenType.comma); + } + // Process >, but the one after needs to be parsed JSX-style. + _jsx.nextJSXTagToken.call(void 0, ); + _index.popTypeContext.call(void 0, oldIsType); + } +} exports.tsTryParseJSXTypeArgument = tsTryParseJSXTypeArgument; + +function tsParseHeritageClause() { + while (!_index.match.call(void 0, _types.TokenType.braceL) && !_base.state.error) { + tsParseExpressionWithTypeArguments(); + _index.eat.call(void 0, _types.TokenType.comma); + } +} + +function tsParseExpressionWithTypeArguments() { + // Note: TS uses parseLeftHandSideExpressionOrHigher, + // then has grammar errors later if it's not an EntityName. + tsParseEntityName(); + if (_index.match.call(void 0, _types.TokenType.lessThan)) { + tsParseTypeArguments(); + } +} + +function tsParseInterfaceDeclaration() { + _lval.parseBindingIdentifier.call(void 0, false); + tsTryParseTypeParameters(); + if (_index.eat.call(void 0, _types.TokenType._extends)) { + tsParseHeritageClause(); + } + tsParseObjectTypeMembers(); +} + +function tsParseTypeAliasDeclaration() { + _lval.parseBindingIdentifier.call(void 0, false); + tsTryParseTypeParameters(); + _util.expect.call(void 0, _types.TokenType.eq); + tsParseType(); + _util.semicolon.call(void 0, ); +} + +function tsParseEnumMember() { + // Computed property names are grammar errors in an enum, so accept just string literal or identifier. + if (_index.match.call(void 0, _types.TokenType.string)) { + _expression.parseLiteral.call(void 0, ); + } else { + _expression.parseIdentifier.call(void 0, ); + } + if (_index.eat.call(void 0, _types.TokenType.eq)) { + const eqIndex = _base.state.tokens.length - 1; + _expression.parseMaybeAssign.call(void 0, ); + _base.state.tokens[eqIndex].rhsEndIndex = _base.state.tokens.length; + } +} + +function tsParseEnumDeclaration() { + _lval.parseBindingIdentifier.call(void 0, false); + _util.expect.call(void 0, _types.TokenType.braceL); + while (!_index.eat.call(void 0, _types.TokenType.braceR) && !_base.state.error) { + tsParseEnumMember(); + _index.eat.call(void 0, _types.TokenType.comma); + } +} + +function tsParseModuleBlock() { + _util.expect.call(void 0, _types.TokenType.braceL); + _statement.parseBlockBody.call(void 0, /* end */ _types.TokenType.braceR); +} + +function tsParseModuleOrNamespaceDeclaration() { + _lval.parseBindingIdentifier.call(void 0, false); + if (_index.eat.call(void 0, _types.TokenType.dot)) { + tsParseModuleOrNamespaceDeclaration(); + } else { + tsParseModuleBlock(); + } +} + +function tsParseAmbientExternalModuleDeclaration() { + if (_util.isContextual.call(void 0, _keywords.ContextualKeyword._global)) { + _expression.parseIdentifier.call(void 0, ); + } else if (_index.match.call(void 0, _types.TokenType.string)) { + _expression.parseExprAtom.call(void 0, ); + } else { + _util.unexpected.call(void 0, ); + } + + if (_index.match.call(void 0, _types.TokenType.braceL)) { + tsParseModuleBlock(); + } else { + _util.semicolon.call(void 0, ); + } +} + + function tsParseImportEqualsDeclaration() { + _lval.parseImportedIdentifier.call(void 0, ); + _util.expect.call(void 0, _types.TokenType.eq); + tsParseModuleReference(); + _util.semicolon.call(void 0, ); +} exports.tsParseImportEqualsDeclaration = tsParseImportEqualsDeclaration; + +function tsIsExternalModuleReference() { + return _util.isContextual.call(void 0, _keywords.ContextualKeyword._require) && _index.lookaheadType.call(void 0, ) === _types.TokenType.parenL; +} + +function tsParseModuleReference() { + if (tsIsExternalModuleReference()) { + tsParseExternalModuleReference(); + } else { + tsParseEntityName(); + } +} + +function tsParseExternalModuleReference() { + _util.expectContextual.call(void 0, _keywords.ContextualKeyword._require); + _util.expect.call(void 0, _types.TokenType.parenL); + if (!_index.match.call(void 0, _types.TokenType.string)) { + _util.unexpected.call(void 0, ); + } + _expression.parseLiteral.call(void 0, ); + _util.expect.call(void 0, _types.TokenType.parenR); +} + +// Utilities + +// Returns true if a statement matched. +function tsTryParseDeclare() { + if (_util.isLineTerminator.call(void 0, )) { + return false; + } + switch (_base.state.type) { + case _types.TokenType._function: { + const oldIsType = _index.pushTypeContext.call(void 0, 1); + _index.next.call(void 0, ); + // We don't need to precisely get the function start here, since it's only used to mark + // the function as a type if it's bodiless, and it's already a type here. + const functionStart = _base.state.start; + _statement.parseFunction.call(void 0, functionStart, /* isStatement */ true); + _index.popTypeContext.call(void 0, oldIsType); + return true; + } + case _types.TokenType._class: { + const oldIsType = _index.pushTypeContext.call(void 0, 1); + _statement.parseClass.call(void 0, /* isStatement */ true, /* optionalId */ false); + _index.popTypeContext.call(void 0, oldIsType); + return true; + } + case _types.TokenType._const: { + if (_index.match.call(void 0, _types.TokenType._const) && _util.isLookaheadContextual.call(void 0, _keywords.ContextualKeyword._enum)) { + const oldIsType = _index.pushTypeContext.call(void 0, 1); + // `const enum = 0;` not allowed because "enum" is a strict mode reserved word. + _util.expect.call(void 0, _types.TokenType._const); + _util.expectContextual.call(void 0, _keywords.ContextualKeyword._enum); + _base.state.tokens[_base.state.tokens.length - 1].type = _types.TokenType._enum; + tsParseEnumDeclaration(); + _index.popTypeContext.call(void 0, oldIsType); + return true; + } + } + // falls through + case _types.TokenType._var: + case _types.TokenType._let: { + const oldIsType = _index.pushTypeContext.call(void 0, 1); + _statement.parseVarStatement.call(void 0, _base.state.type !== _types.TokenType._var); + _index.popTypeContext.call(void 0, oldIsType); + return true; + } + case _types.TokenType.name: { + const oldIsType = _index.pushTypeContext.call(void 0, 1); + const contextualKeyword = _base.state.contextualKeyword; + let matched = false; + if (contextualKeyword === _keywords.ContextualKeyword._global) { + tsParseAmbientExternalModuleDeclaration(); + matched = true; + } else { + matched = tsParseDeclaration(contextualKeyword, /* isBeforeToken */ true); + } + _index.popTypeContext.call(void 0, oldIsType); + return matched; + } + default: + return false; + } +} + +// Note: this won't be called unless the keyword is allowed in `shouldParseExportDeclaration`. +// Returns true if it matched a declaration. +function tsTryParseExportDeclaration() { + return tsParseDeclaration(_base.state.contextualKeyword, /* isBeforeToken */ true); +} + +// Returns true if it matched a statement. +function tsParseExpressionStatement(contextualKeyword) { + switch (contextualKeyword) { + case _keywords.ContextualKeyword._declare: { + const declareTokenIndex = _base.state.tokens.length - 1; + const matched = tsTryParseDeclare(); + if (matched) { + _base.state.tokens[declareTokenIndex].type = _types.TokenType._declare; + return true; + } + break; + } + case _keywords.ContextualKeyword._global: + // `global { }` (with no `declare`) may appear inside an ambient module declaration. + // Would like to use tsParseAmbientExternalModuleDeclaration here, but already ran past "global". + if (_index.match.call(void 0, _types.TokenType.braceL)) { + tsParseModuleBlock(); + return true; + } + break; + + default: + return tsParseDeclaration(contextualKeyword, /* isBeforeToken */ false); + } + return false; +} + +/** + * Common code for parsing a declaration. + * + * isBeforeToken indicates that the current parser state is at the contextual + * keyword (and that it is not yet emitted) rather than reading the token after + * it. When isBeforeToken is true, we may be preceded by an `export` token and + * should include that token in a type context we create, e.g. to handle + * `export interface` or `export type`. (This is a bit of a hack and should be + * cleaned up at some point.) + * + * Returns true if it matched a declaration. + */ +function tsParseDeclaration(contextualKeyword, isBeforeToken) { + switch (contextualKeyword) { + case _keywords.ContextualKeyword._abstract: + if (tsCheckLineTerminator(isBeforeToken) && _index.match.call(void 0, _types.TokenType._class)) { + _base.state.tokens[_base.state.tokens.length - 1].type = _types.TokenType._abstract; + _statement.parseClass.call(void 0, /* isStatement */ true, /* optionalId */ false); + return true; + } + break; + + case _keywords.ContextualKeyword._enum: + if (tsCheckLineTerminator(isBeforeToken) && _index.match.call(void 0, _types.TokenType.name)) { + _base.state.tokens[_base.state.tokens.length - 1].type = _types.TokenType._enum; + tsParseEnumDeclaration(); + return true; + } + break; + + case _keywords.ContextualKeyword._interface: + if (tsCheckLineTerminator(isBeforeToken) && _index.match.call(void 0, _types.TokenType.name)) { + // `next` is true in "export" and "declare" contexts, so we want to remove that token + // as well. + const oldIsType = _index.pushTypeContext.call(void 0, isBeforeToken ? 2 : 1); + tsParseInterfaceDeclaration(); + _index.popTypeContext.call(void 0, oldIsType); + return true; + } + break; + + case _keywords.ContextualKeyword._module: + if (tsCheckLineTerminator(isBeforeToken)) { + if (_index.match.call(void 0, _types.TokenType.string)) { + const oldIsType = _index.pushTypeContext.call(void 0, isBeforeToken ? 2 : 1); + tsParseAmbientExternalModuleDeclaration(); + _index.popTypeContext.call(void 0, oldIsType); + return true; + } else if (_index.match.call(void 0, _types.TokenType.name)) { + const oldIsType = _index.pushTypeContext.call(void 0, isBeforeToken ? 2 : 1); + tsParseModuleOrNamespaceDeclaration(); + _index.popTypeContext.call(void 0, oldIsType); + return true; + } + } + break; + + case _keywords.ContextualKeyword._namespace: + if (tsCheckLineTerminator(isBeforeToken) && _index.match.call(void 0, _types.TokenType.name)) { + const oldIsType = _index.pushTypeContext.call(void 0, isBeforeToken ? 2 : 1); + tsParseModuleOrNamespaceDeclaration(); + _index.popTypeContext.call(void 0, oldIsType); + return true; + } + break; + + case _keywords.ContextualKeyword._type: + if (tsCheckLineTerminator(isBeforeToken) && _index.match.call(void 0, _types.TokenType.name)) { + const oldIsType = _index.pushTypeContext.call(void 0, isBeforeToken ? 2 : 1); + tsParseTypeAliasDeclaration(); + _index.popTypeContext.call(void 0, oldIsType); + return true; + } + break; + + default: + break; + } + return false; +} + +function tsCheckLineTerminator(isBeforeToken) { + if (isBeforeToken) { + // Babel checks hasFollowingLineBreak here and returns false, but this + // doesn't actually come up, e.g. `export interface` can never be on its own + // line in valid code. + _index.next.call(void 0, ); + return true; + } else { + return !_util.isLineTerminator.call(void 0, ); + } +} + +// Returns true if there was a generic async arrow function. +function tsTryParseGenericAsyncArrowFunction() { + const snapshot = _base.state.snapshot(); + + tsParseTypeParameters(); + _statement.parseFunctionParams.call(void 0, ); + tsTryParseTypeOrTypePredicateAnnotation(); + _util.expect.call(void 0, _types.TokenType.arrow); + + if (_base.state.error) { + _base.state.restoreFromSnapshot(snapshot); + return false; + } + + _expression.parseFunctionBody.call(void 0, true); + return true; +} + +/** + * If necessary, hack the tokenizer state so that this bitshift was actually a + * less-than token, then keep parsing. This should only be used in situations + * where we restore from snapshot on error (which reverts this change) or + * where bitshift would be illegal anyway (e.g. in a class "extends" clause). + * + * This hack is useful to handle situations like foo<() => void>() where + * there can legitimately be two open-angle-brackets in a row in TS. + */ +function tsParseTypeArgumentsWithPossibleBitshift() { + if (_base.state.type === _types.TokenType.bitShiftL) { + _base.state.pos -= 1; + _index.finishToken.call(void 0, _types.TokenType.lessThan); + } + tsParseTypeArguments(); +} + +function tsParseTypeArguments() { + const oldIsType = _index.pushTypeContext.call(void 0, 0); + _util.expect.call(void 0, _types.TokenType.lessThan); + while (!_index.match.call(void 0, _types.TokenType.greaterThan) && !_base.state.error) { + tsParseType(); + _index.eat.call(void 0, _types.TokenType.comma); + } + if (!oldIsType) { + // If the type arguments are present in an expression context, e.g. + // f(), then the > sign should be tokenized as a non-type token. + // In particular, f(a < b, c >= d) should parse the >= as a single token, + // resulting in a syntax error and fallback to the non-type-args + // interpretation. In the success case, even though the > is tokenized as a + // non-type token, it still must be marked as a type token so that it is + // erased. + _index.popTypeContext.call(void 0, oldIsType); + _index.rescan_gt.call(void 0, ); + _util.expect.call(void 0, _types.TokenType.greaterThan); + _base.state.tokens[_base.state.tokens.length - 1].isType = true; + } else { + _util.expect.call(void 0, _types.TokenType.greaterThan); + _index.popTypeContext.call(void 0, oldIsType); + } +} + + function tsIsDeclarationStart() { + if (_index.match.call(void 0, _types.TokenType.name)) { + switch (_base.state.contextualKeyword) { + case _keywords.ContextualKeyword._abstract: + case _keywords.ContextualKeyword._declare: + case _keywords.ContextualKeyword._enum: + case _keywords.ContextualKeyword._interface: + case _keywords.ContextualKeyword._module: + case _keywords.ContextualKeyword._namespace: + case _keywords.ContextualKeyword._type: + return true; + default: + break; + } + } + + return false; +} exports.tsIsDeclarationStart = tsIsDeclarationStart; + +// ====================================================== +// OVERRIDES +// ====================================================== + + function tsParseFunctionBodyAndFinish(functionStart, funcContextId) { + // For arrow functions, `parseArrow` handles the return type itself. + if (_index.match.call(void 0, _types.TokenType.colon)) { + tsParseTypeOrTypePredicateAnnotation(_types.TokenType.colon); + } + + // The original code checked the node type to make sure this function type allows a missing + // body, but we skip that to avoid sending around the node type. We instead just use the + // allowExpressionBody boolean to make sure it's not an arrow function. + if (!_index.match.call(void 0, _types.TokenType.braceL) && _util.isLineTerminator.call(void 0, )) { + // Retroactively mark the function declaration as a type. + let i = _base.state.tokens.length - 1; + while ( + i >= 0 && + (_base.state.tokens[i].start >= functionStart || + _base.state.tokens[i].type === _types.TokenType._default || + _base.state.tokens[i].type === _types.TokenType._export) + ) { + _base.state.tokens[i].isType = true; + i--; + } + return; + } + + _expression.parseFunctionBody.call(void 0, false, funcContextId); +} exports.tsParseFunctionBodyAndFinish = tsParseFunctionBodyAndFinish; + + function tsParseSubscript( + startTokenIndex, + noCalls, + stopState, +) { + if (!_util.hasPrecedingLineBreak.call(void 0, ) && _index.eat.call(void 0, _types.TokenType.bang)) { + _base.state.tokens[_base.state.tokens.length - 1].type = _types.TokenType.nonNullAssertion; + return; + } + + if (_index.match.call(void 0, _types.TokenType.lessThan) || _index.match.call(void 0, _types.TokenType.bitShiftL)) { + // There are number of things we are going to "maybe" parse, like type arguments on + // tagged template expressions. If any of them fail, walk it back and continue. + const snapshot = _base.state.snapshot(); + + if (!noCalls && _expression.atPossibleAsync.call(void 0, )) { + // Almost certainly this is a generic async function `async () => ... + // But it might be a call with a type argument `async();` + const asyncArrowFn = tsTryParseGenericAsyncArrowFunction(); + if (asyncArrowFn) { + return; + } + } + tsParseTypeArgumentsWithPossibleBitshift(); + if (!noCalls && _index.eat.call(void 0, _types.TokenType.parenL)) { + // With f(), the subscriptStartIndex marker is on the ( token. + _base.state.tokens[_base.state.tokens.length - 1].subscriptStartIndex = startTokenIndex; + _expression.parseCallExpressionArguments.call(void 0, ); + } else if (_index.match.call(void 0, _types.TokenType.backQuote)) { + // Tagged template with a type argument. + _expression.parseTemplate.call(void 0, ); + } else if ( + // The remaining possible case is an instantiation expression, e.g. + // Array . Check for a few cases that would disqualify it and + // cause us to bail out. + // a>c is not (a)>c, but a<(b>>c) + _base.state.type === _types.TokenType.greaterThan || + // ac is (ac + (_base.state.type !== _types.TokenType.parenL && + Boolean(_base.state.type & _types.TokenType.IS_EXPRESSION_START) && + !_util.hasPrecedingLineBreak.call(void 0, )) + ) { + // Bail out. We have something like ac, which is not an expression with + // type arguments but an (a < b) > c comparison. + _util.unexpected.call(void 0, ); + } + + if (_base.state.error) { + _base.state.restoreFromSnapshot(snapshot); + } else { + return; + } + } else if (!noCalls && _index.match.call(void 0, _types.TokenType.questionDot) && _index.lookaheadType.call(void 0, ) === _types.TokenType.lessThan) { + // If we see f?.<, then this must be an optional call with a type argument. + _index.next.call(void 0, ); + _base.state.tokens[startTokenIndex].isOptionalChainStart = true; + // With f?.(), the subscriptStartIndex marker is on the ?. token. + _base.state.tokens[_base.state.tokens.length - 1].subscriptStartIndex = startTokenIndex; + + tsParseTypeArguments(); + _util.expect.call(void 0, _types.TokenType.parenL); + _expression.parseCallExpressionArguments.call(void 0, ); + } + _expression.baseParseSubscript.call(void 0, startTokenIndex, noCalls, stopState); +} exports.tsParseSubscript = tsParseSubscript; + + function tsTryParseExport() { + if (_index.eat.call(void 0, _types.TokenType._import)) { + // One of these cases: + // export import A = B; + // export import type A = require("A"); + if (_util.isContextual.call(void 0, _keywords.ContextualKeyword._type) && _index.lookaheadType.call(void 0, ) !== _types.TokenType.eq) { + // Eat a `type` token, unless it's actually an identifier name. + _util.expectContextual.call(void 0, _keywords.ContextualKeyword._type); + } + tsParseImportEqualsDeclaration(); + return true; + } else if (_index.eat.call(void 0, _types.TokenType.eq)) { + // `export = x;` + _expression.parseExpression.call(void 0, ); + _util.semicolon.call(void 0, ); + return true; + } else if (_util.eatContextual.call(void 0, _keywords.ContextualKeyword._as)) { + // `export as namespace A;` + // See `parseNamespaceExportDeclaration` in TypeScript's own parser + _util.expectContextual.call(void 0, _keywords.ContextualKeyword._namespace); + _expression.parseIdentifier.call(void 0, ); + _util.semicolon.call(void 0, ); + return true; + } else { + if (_util.isContextual.call(void 0, _keywords.ContextualKeyword._type)) { + const nextType = _index.lookaheadType.call(void 0, ); + // export type {foo} from 'a'; + // export type * from 'a';' + // export type * as ns from 'a';' + if (nextType === _types.TokenType.braceL || nextType === _types.TokenType.star) { + _index.next.call(void 0, ); + } + } + return false; + } +} exports.tsTryParseExport = tsTryParseExport; + +/** + * Parse a TS import specifier, which may be prefixed with "type" and may be of + * the form `foo as bar`. + * + * The number of identifier-like tokens we see happens to be enough to uniquely + * identify the form, so simply count the number of identifiers rather than + * matching the words `type` or `as`. This is particularly important because + * `type` and `as` could each actually be plain identifiers rather than + * keywords. + */ + function tsParseImportSpecifier() { + _expression.parseIdentifier.call(void 0, ); + if (_index.match.call(void 0, _types.TokenType.comma) || _index.match.call(void 0, _types.TokenType.braceR)) { + // import {foo} + _base.state.tokens[_base.state.tokens.length - 1].identifierRole = _index.IdentifierRole.ImportDeclaration; + return; + } + _expression.parseIdentifier.call(void 0, ); + if (_index.match.call(void 0, _types.TokenType.comma) || _index.match.call(void 0, _types.TokenType.braceR)) { + // import {type foo} + _base.state.tokens[_base.state.tokens.length - 1].identifierRole = _index.IdentifierRole.ImportDeclaration; + _base.state.tokens[_base.state.tokens.length - 2].isType = true; + _base.state.tokens[_base.state.tokens.length - 1].isType = true; + return; + } + _expression.parseIdentifier.call(void 0, ); + if (_index.match.call(void 0, _types.TokenType.comma) || _index.match.call(void 0, _types.TokenType.braceR)) { + // import {foo as bar} + _base.state.tokens[_base.state.tokens.length - 3].identifierRole = _index.IdentifierRole.ImportAccess; + _base.state.tokens[_base.state.tokens.length - 1].identifierRole = _index.IdentifierRole.ImportDeclaration; + return; + } + _expression.parseIdentifier.call(void 0, ); + // import {type foo as bar} + _base.state.tokens[_base.state.tokens.length - 3].identifierRole = _index.IdentifierRole.ImportAccess; + _base.state.tokens[_base.state.tokens.length - 1].identifierRole = _index.IdentifierRole.ImportDeclaration; + _base.state.tokens[_base.state.tokens.length - 4].isType = true; + _base.state.tokens[_base.state.tokens.length - 3].isType = true; + _base.state.tokens[_base.state.tokens.length - 2].isType = true; + _base.state.tokens[_base.state.tokens.length - 1].isType = true; +} exports.tsParseImportSpecifier = tsParseImportSpecifier; + +/** + * Just like named import specifiers, export specifiers can have from 1 to 4 + * tokens, inclusive, and the number of tokens determines the role of each token. + */ + function tsParseExportSpecifier() { + _expression.parseIdentifier.call(void 0, ); + if (_index.match.call(void 0, _types.TokenType.comma) || _index.match.call(void 0, _types.TokenType.braceR)) { + // export {foo} + _base.state.tokens[_base.state.tokens.length - 1].identifierRole = _index.IdentifierRole.ExportAccess; + return; + } + _expression.parseIdentifier.call(void 0, ); + if (_index.match.call(void 0, _types.TokenType.comma) || _index.match.call(void 0, _types.TokenType.braceR)) { + // export {type foo} + _base.state.tokens[_base.state.tokens.length - 1].identifierRole = _index.IdentifierRole.ExportAccess; + _base.state.tokens[_base.state.tokens.length - 2].isType = true; + _base.state.tokens[_base.state.tokens.length - 1].isType = true; + return; + } + _expression.parseIdentifier.call(void 0, ); + if (_index.match.call(void 0, _types.TokenType.comma) || _index.match.call(void 0, _types.TokenType.braceR)) { + // export {foo as bar} + _base.state.tokens[_base.state.tokens.length - 3].identifierRole = _index.IdentifierRole.ExportAccess; + return; + } + _expression.parseIdentifier.call(void 0, ); + // export {type foo as bar} + _base.state.tokens[_base.state.tokens.length - 3].identifierRole = _index.IdentifierRole.ExportAccess; + _base.state.tokens[_base.state.tokens.length - 4].isType = true; + _base.state.tokens[_base.state.tokens.length - 3].isType = true; + _base.state.tokens[_base.state.tokens.length - 2].isType = true; + _base.state.tokens[_base.state.tokens.length - 1].isType = true; +} exports.tsParseExportSpecifier = tsParseExportSpecifier; + + function tsTryParseExportDefaultExpression() { + if (_util.isContextual.call(void 0, _keywords.ContextualKeyword._abstract) && _index.lookaheadType.call(void 0, ) === _types.TokenType._class) { + _base.state.type = _types.TokenType._abstract; + _index.next.call(void 0, ); // Skip "abstract" + _statement.parseClass.call(void 0, true, true); + return true; + } + if (_util.isContextual.call(void 0, _keywords.ContextualKeyword._interface)) { + // Make sure "export default" are considered type tokens so the whole thing is removed. + const oldIsType = _index.pushTypeContext.call(void 0, 2); + tsParseDeclaration(_keywords.ContextualKeyword._interface, true); + _index.popTypeContext.call(void 0, oldIsType); + return true; + } + return false; +} exports.tsTryParseExportDefaultExpression = tsTryParseExportDefaultExpression; + + function tsTryParseStatementContent() { + if (_base.state.type === _types.TokenType._const) { + const ahead = _index.lookaheadTypeAndKeyword.call(void 0, ); + if (ahead.type === _types.TokenType.name && ahead.contextualKeyword === _keywords.ContextualKeyword._enum) { + _util.expect.call(void 0, _types.TokenType._const); + _util.expectContextual.call(void 0, _keywords.ContextualKeyword._enum); + _base.state.tokens[_base.state.tokens.length - 1].type = _types.TokenType._enum; + tsParseEnumDeclaration(); + return true; + } + } + return false; +} exports.tsTryParseStatementContent = tsTryParseStatementContent; + + function tsTryParseClassMemberWithIsStatic(isStatic) { + const memberStartIndexAfterStatic = _base.state.tokens.length; + tsParseModifiers([ + _keywords.ContextualKeyword._abstract, + _keywords.ContextualKeyword._readonly, + _keywords.ContextualKeyword._declare, + _keywords.ContextualKeyword._static, + _keywords.ContextualKeyword._override, + ]); + + const modifiersEndIndex = _base.state.tokens.length; + const found = tsTryParseIndexSignature(); + if (found) { + // Index signatures are type declarations, so set the modifier tokens as + // type tokens. Most tokens could be assumed to be type tokens, but `static` + // is ambiguous unless we set it explicitly here. + const memberStartIndex = isStatic + ? memberStartIndexAfterStatic - 1 + : memberStartIndexAfterStatic; + for (let i = memberStartIndex; i < modifiersEndIndex; i++) { + _base.state.tokens[i].isType = true; + } + return true; + } + return false; +} exports.tsTryParseClassMemberWithIsStatic = tsTryParseClassMemberWithIsStatic; + +// Note: The reason we do this in `parseIdentifierStatement` and not `parseStatement` +// is that e.g. `type()` is valid JS, so we must try parsing that first. +// If it's really a type, we will parse `type` as the statement, and can correct it here +// by parsing the rest. + function tsParseIdentifierStatement(contextualKeyword) { + const matched = tsParseExpressionStatement(contextualKeyword); + if (!matched) { + _util.semicolon.call(void 0, ); + } +} exports.tsParseIdentifierStatement = tsParseIdentifierStatement; + + function tsParseExportDeclaration() { + // "export declare" is equivalent to just "export". + const isDeclare = _util.eatContextual.call(void 0, _keywords.ContextualKeyword._declare); + if (isDeclare) { + _base.state.tokens[_base.state.tokens.length - 1].type = _types.TokenType._declare; + } + + let matchedDeclaration = false; + if (_index.match.call(void 0, _types.TokenType.name)) { + if (isDeclare) { + const oldIsType = _index.pushTypeContext.call(void 0, 2); + matchedDeclaration = tsTryParseExportDeclaration(); + _index.popTypeContext.call(void 0, oldIsType); + } else { + matchedDeclaration = tsTryParseExportDeclaration(); + } + } + if (!matchedDeclaration) { + if (isDeclare) { + const oldIsType = _index.pushTypeContext.call(void 0, 2); + _statement.parseStatement.call(void 0, true); + _index.popTypeContext.call(void 0, oldIsType); + } else { + _statement.parseStatement.call(void 0, true); + } + } +} exports.tsParseExportDeclaration = tsParseExportDeclaration; + + function tsAfterParseClassSuper(hasSuper) { + if (hasSuper && (_index.match.call(void 0, _types.TokenType.lessThan) || _index.match.call(void 0, _types.TokenType.bitShiftL))) { + tsParseTypeArgumentsWithPossibleBitshift(); + } + if (_util.eatContextual.call(void 0, _keywords.ContextualKeyword._implements)) { + _base.state.tokens[_base.state.tokens.length - 1].type = _types.TokenType._implements; + const oldIsType = _index.pushTypeContext.call(void 0, 1); + tsParseHeritageClause(); + _index.popTypeContext.call(void 0, oldIsType); + } +} exports.tsAfterParseClassSuper = tsAfterParseClassSuper; + + function tsStartParseObjPropValue() { + tsTryParseTypeParameters(); +} exports.tsStartParseObjPropValue = tsStartParseObjPropValue; + + function tsStartParseFunctionParams() { + tsTryParseTypeParameters(); +} exports.tsStartParseFunctionParams = tsStartParseFunctionParams; + +// `let x: number;` + function tsAfterParseVarHead() { + const oldIsType = _index.pushTypeContext.call(void 0, 0); + if (!_util.hasPrecedingLineBreak.call(void 0, )) { + _index.eat.call(void 0, _types.TokenType.bang); + } + tsTryParseTypeAnnotation(); + _index.popTypeContext.call(void 0, oldIsType); +} exports.tsAfterParseVarHead = tsAfterParseVarHead; + +// parse the return type of an async arrow function - let foo = (async (): number => {}); + function tsStartParseAsyncArrowFromCallExpression() { + if (_index.match.call(void 0, _types.TokenType.colon)) { + tsParseTypeAnnotation(); + } +} exports.tsStartParseAsyncArrowFromCallExpression = tsStartParseAsyncArrowFromCallExpression; + +// Returns true if the expression was an arrow function. + function tsParseMaybeAssign(noIn, isWithinParens) { + // Note: When the JSX plugin is on, type assertions (` x`) aren't valid syntax. + if (_base.isJSXEnabled) { + return tsParseMaybeAssignWithJSX(noIn, isWithinParens); + } else { + return tsParseMaybeAssignWithoutJSX(noIn, isWithinParens); + } +} exports.tsParseMaybeAssign = tsParseMaybeAssign; + + function tsParseMaybeAssignWithJSX(noIn, isWithinParens) { + if (!_index.match.call(void 0, _types.TokenType.lessThan)) { + return _expression.baseParseMaybeAssign.call(void 0, noIn, isWithinParens); + } + + // Prefer to parse JSX if possible. But may be an arrow fn. + const snapshot = _base.state.snapshot(); + let wasArrow = _expression.baseParseMaybeAssign.call(void 0, noIn, isWithinParens); + if (_base.state.error) { + _base.state.restoreFromSnapshot(snapshot); + } else { + return wasArrow; + } + + // Otherwise, try as type-parameterized arrow function. + _base.state.type = _types.TokenType.typeParameterStart; + // This is similar to TypeScript's `tryParseParenthesizedArrowFunctionExpression`. + tsParseTypeParameters(); + wasArrow = _expression.baseParseMaybeAssign.call(void 0, noIn, isWithinParens); + if (!wasArrow) { + _util.unexpected.call(void 0, ); + } + + return wasArrow; +} exports.tsParseMaybeAssignWithJSX = tsParseMaybeAssignWithJSX; + + function tsParseMaybeAssignWithoutJSX(noIn, isWithinParens) { + if (!_index.match.call(void 0, _types.TokenType.lessThan)) { + return _expression.baseParseMaybeAssign.call(void 0, noIn, isWithinParens); + } + + const snapshot = _base.state.snapshot(); + // This is similar to TypeScript's `tryParseParenthesizedArrowFunctionExpression`. + tsParseTypeParameters(); + const wasArrow = _expression.baseParseMaybeAssign.call(void 0, noIn, isWithinParens); + if (!wasArrow) { + _util.unexpected.call(void 0, ); + } + if (_base.state.error) { + _base.state.restoreFromSnapshot(snapshot); + } else { + return wasArrow; + } + + // Try parsing a type cast instead of an arrow function. + // This will start with a type assertion (via parseMaybeUnary). + // But don't directly call `tsParseTypeAssertion` because we want to handle any binary after it. + return _expression.baseParseMaybeAssign.call(void 0, noIn, isWithinParens); +} exports.tsParseMaybeAssignWithoutJSX = tsParseMaybeAssignWithoutJSX; + + function tsParseArrow() { + if (_index.match.call(void 0, _types.TokenType.colon)) { + // This is different from how the TS parser does it. + // TS uses lookahead. Babylon parses it as a parenthesized expression and converts. + const snapshot = _base.state.snapshot(); + + tsParseTypeOrTypePredicateAnnotation(_types.TokenType.colon); + if (_util.canInsertSemicolon.call(void 0, )) _util.unexpected.call(void 0, ); + if (!_index.match.call(void 0, _types.TokenType.arrow)) _util.unexpected.call(void 0, ); + + if (_base.state.error) { + _base.state.restoreFromSnapshot(snapshot); + } + } + return _index.eat.call(void 0, _types.TokenType.arrow); +} exports.tsParseArrow = tsParseArrow; + +// Allow type annotations inside of a parameter list. + function tsParseAssignableListItemTypes() { + const oldIsType = _index.pushTypeContext.call(void 0, 0); + _index.eat.call(void 0, _types.TokenType.question); + tsTryParseTypeAnnotation(); + _index.popTypeContext.call(void 0, oldIsType); +} exports.tsParseAssignableListItemTypes = tsParseAssignableListItemTypes; + + function tsParseMaybeDecoratorArguments() { + if (_index.match.call(void 0, _types.TokenType.lessThan) || _index.match.call(void 0, _types.TokenType.bitShiftL)) { + tsParseTypeArgumentsWithPossibleBitshift(); + } + _statement.baseParseMaybeDecoratorArguments.call(void 0, ); +} exports.tsParseMaybeDecoratorArguments = tsParseMaybeDecoratorArguments; Index: frontend/node_modules/sucrase/dist/parser/tokenizer/index.js =================================================================== --- frontend/node_modules/sucrase/dist/parser/tokenizer/index.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/parser/tokenizer/index.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,1004 @@ +"use strict";Object.defineProperty(exports, "__esModule", {value: true}); function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }/* eslint max-len: 0 */ + +var _base = require('../traverser/base'); +var _util = require('../traverser/util'); +var _charcodes = require('../util/charcodes'); +var _identifier = require('../util/identifier'); +var _whitespace = require('../util/whitespace'); +var _keywords = require('./keywords'); +var _readWord = require('./readWord'); var _readWord2 = _interopRequireDefault(_readWord); +var _types = require('./types'); + +var IdentifierRole; (function (IdentifierRole) { + const Access = 0; IdentifierRole[IdentifierRole["Access"] = Access] = "Access"; + const ExportAccess = Access + 1; IdentifierRole[IdentifierRole["ExportAccess"] = ExportAccess] = "ExportAccess"; + const TopLevelDeclaration = ExportAccess + 1; IdentifierRole[IdentifierRole["TopLevelDeclaration"] = TopLevelDeclaration] = "TopLevelDeclaration"; + const FunctionScopedDeclaration = TopLevelDeclaration + 1; IdentifierRole[IdentifierRole["FunctionScopedDeclaration"] = FunctionScopedDeclaration] = "FunctionScopedDeclaration"; + const BlockScopedDeclaration = FunctionScopedDeclaration + 1; IdentifierRole[IdentifierRole["BlockScopedDeclaration"] = BlockScopedDeclaration] = "BlockScopedDeclaration"; + const ObjectShorthandTopLevelDeclaration = BlockScopedDeclaration + 1; IdentifierRole[IdentifierRole["ObjectShorthandTopLevelDeclaration"] = ObjectShorthandTopLevelDeclaration] = "ObjectShorthandTopLevelDeclaration"; + const ObjectShorthandFunctionScopedDeclaration = ObjectShorthandTopLevelDeclaration + 1; IdentifierRole[IdentifierRole["ObjectShorthandFunctionScopedDeclaration"] = ObjectShorthandFunctionScopedDeclaration] = "ObjectShorthandFunctionScopedDeclaration"; + const ObjectShorthandBlockScopedDeclaration = ObjectShorthandFunctionScopedDeclaration + 1; IdentifierRole[IdentifierRole["ObjectShorthandBlockScopedDeclaration"] = ObjectShorthandBlockScopedDeclaration] = "ObjectShorthandBlockScopedDeclaration"; + const ObjectShorthand = ObjectShorthandBlockScopedDeclaration + 1; IdentifierRole[IdentifierRole["ObjectShorthand"] = ObjectShorthand] = "ObjectShorthand"; + // Any identifier bound in an import statement, e.g. both A and b from + // `import A, * as b from 'A';` + const ImportDeclaration = ObjectShorthand + 1; IdentifierRole[IdentifierRole["ImportDeclaration"] = ImportDeclaration] = "ImportDeclaration"; + const ObjectKey = ImportDeclaration + 1; IdentifierRole[IdentifierRole["ObjectKey"] = ObjectKey] = "ObjectKey"; + // The `foo` in `import {foo as bar} from "./abc";`. + const ImportAccess = ObjectKey + 1; IdentifierRole[IdentifierRole["ImportAccess"] = ImportAccess] = "ImportAccess"; +})(IdentifierRole || (exports.IdentifierRole = IdentifierRole = {})); + +/** + * Extra information on jsxTagStart tokens, used to determine which of the three + * jsx functions are called in the automatic transform. + */ +var JSXRole; (function (JSXRole) { + // The element is self-closing or has a body that resolves to empty. We + // shouldn't emit children at all in this case. + const NoChildren = 0; JSXRole[JSXRole["NoChildren"] = NoChildren] = "NoChildren"; + // The element has a single explicit child, which might still be an arbitrary + // expression like an array. We should emit that expression as the children. + const OneChild = NoChildren + 1; JSXRole[JSXRole["OneChild"] = OneChild] = "OneChild"; + // The element has at least two explicitly-specified children or has spread + // children, so child positions are assumed to be "static". We should wrap + // these children in an array. + const StaticChildren = OneChild + 1; JSXRole[JSXRole["StaticChildren"] = StaticChildren] = "StaticChildren"; + // The element has a prop named "key" after a prop spread, so we should fall + // back to the createElement function. + const KeyAfterPropSpread = StaticChildren + 1; JSXRole[JSXRole["KeyAfterPropSpread"] = KeyAfterPropSpread] = "KeyAfterPropSpread"; +})(JSXRole || (exports.JSXRole = JSXRole = {})); + + function isDeclaration(token) { + const role = token.identifierRole; + return ( + role === IdentifierRole.TopLevelDeclaration || + role === IdentifierRole.FunctionScopedDeclaration || + role === IdentifierRole.BlockScopedDeclaration || + role === IdentifierRole.ObjectShorthandTopLevelDeclaration || + role === IdentifierRole.ObjectShorthandFunctionScopedDeclaration || + role === IdentifierRole.ObjectShorthandBlockScopedDeclaration + ); +} exports.isDeclaration = isDeclaration; + + function isNonTopLevelDeclaration(token) { + const role = token.identifierRole; + return ( + role === IdentifierRole.FunctionScopedDeclaration || + role === IdentifierRole.BlockScopedDeclaration || + role === IdentifierRole.ObjectShorthandFunctionScopedDeclaration || + role === IdentifierRole.ObjectShorthandBlockScopedDeclaration + ); +} exports.isNonTopLevelDeclaration = isNonTopLevelDeclaration; + + function isTopLevelDeclaration(token) { + const role = token.identifierRole; + return ( + role === IdentifierRole.TopLevelDeclaration || + role === IdentifierRole.ObjectShorthandTopLevelDeclaration || + role === IdentifierRole.ImportDeclaration + ); +} exports.isTopLevelDeclaration = isTopLevelDeclaration; + + function isBlockScopedDeclaration(token) { + const role = token.identifierRole; + // Treat top-level declarations as block scope since the distinction doesn't matter here. + return ( + role === IdentifierRole.TopLevelDeclaration || + role === IdentifierRole.BlockScopedDeclaration || + role === IdentifierRole.ObjectShorthandTopLevelDeclaration || + role === IdentifierRole.ObjectShorthandBlockScopedDeclaration + ); +} exports.isBlockScopedDeclaration = isBlockScopedDeclaration; + + function isFunctionScopedDeclaration(token) { + const role = token.identifierRole; + return ( + role === IdentifierRole.FunctionScopedDeclaration || + role === IdentifierRole.ObjectShorthandFunctionScopedDeclaration + ); +} exports.isFunctionScopedDeclaration = isFunctionScopedDeclaration; + + function isObjectShorthandDeclaration(token) { + return ( + token.identifierRole === IdentifierRole.ObjectShorthandTopLevelDeclaration || + token.identifierRole === IdentifierRole.ObjectShorthandBlockScopedDeclaration || + token.identifierRole === IdentifierRole.ObjectShorthandFunctionScopedDeclaration + ); +} exports.isObjectShorthandDeclaration = isObjectShorthandDeclaration; + +// Object type used to represent tokens. Note that normally, tokens +// simply exist as properties on the parser object. This is only +// used for the onToken callback and the external tokenizer. + class Token { + constructor() { + this.type = _base.state.type; + this.contextualKeyword = _base.state.contextualKeyword; + this.start = _base.state.start; + this.end = _base.state.end; + this.scopeDepth = _base.state.scopeDepth; + this.isType = _base.state.isType; + this.identifierRole = null; + this.jsxRole = null; + this.shadowsGlobal = false; + this.isAsyncOperation = false; + this.contextId = null; + this.rhsEndIndex = null; + this.isExpression = false; + this.numNullishCoalesceStarts = 0; + this.numNullishCoalesceEnds = 0; + this.isOptionalChainStart = false; + this.isOptionalChainEnd = false; + this.subscriptStartIndex = null; + this.nullishStartIndex = null; + } + + + + + + + + + + // Initially false for all tokens, then may be computed in a follow-up step that does scope + // analysis. + + // Initially false for all tokens, but may be set during transform to mark it as containing an + // await operation. + + + // For assignments, the index of the RHS. For export tokens, the end of the export. + + // For class tokens, records if the class is a class expression or a class statement. + + // Number of times to insert a `nullishCoalesce(` snippet before this token. + + // Number of times to insert a `)` snippet after this token. + + // If true, insert an `optionalChain([` snippet before this token. + + // If true, insert a `])` snippet after this token. + + // Tag for `.`, `?.`, `[`, `?.[`, `(`, and `?.(` to denote the "root" token for this + // subscript chain. This can be used to determine if this chain is an optional chain. + + // Tag for `??` operators to denote the root token for this nullish coalescing call. + +} exports.Token = Token; + +// ## Tokenizer + +// Move to the next token + function next() { + _base.state.tokens.push(new Token()); + nextToken(); +} exports.next = next; + +// Call instead of next when inside a template, since that needs to be handled differently. + function nextTemplateToken() { + _base.state.tokens.push(new Token()); + _base.state.start = _base.state.pos; + readTmplToken(); +} exports.nextTemplateToken = nextTemplateToken; + +// The tokenizer never parses regexes by default. Instead, the parser is responsible for +// instructing it to parse a regex when we see a slash at the start of an expression. + function retokenizeSlashAsRegex() { + if (_base.state.type === _types.TokenType.assign) { + --_base.state.pos; + } + readRegexp(); +} exports.retokenizeSlashAsRegex = retokenizeSlashAsRegex; + + function pushTypeContext(existingTokensInType) { + for (let i = _base.state.tokens.length - existingTokensInType; i < _base.state.tokens.length; i++) { + _base.state.tokens[i].isType = true; + } + const oldIsType = _base.state.isType; + _base.state.isType = true; + return oldIsType; +} exports.pushTypeContext = pushTypeContext; + + function popTypeContext(oldIsType) { + _base.state.isType = oldIsType; +} exports.popTypeContext = popTypeContext; + + function eat(type) { + if (match(type)) { + next(); + return true; + } else { + return false; + } +} exports.eat = eat; + + function eatTypeToken(tokenType) { + const oldIsType = _base.state.isType; + _base.state.isType = true; + eat(tokenType); + _base.state.isType = oldIsType; +} exports.eatTypeToken = eatTypeToken; + + function match(type) { + return _base.state.type === type; +} exports.match = match; + + function lookaheadType() { + const snapshot = _base.state.snapshot(); + next(); + const type = _base.state.type; + _base.state.restoreFromSnapshot(snapshot); + return type; +} exports.lookaheadType = lookaheadType; + + class TypeAndKeyword { + + + constructor(type, contextualKeyword) { + this.type = type; + this.contextualKeyword = contextualKeyword; + } +} exports.TypeAndKeyword = TypeAndKeyword; + + function lookaheadTypeAndKeyword() { + const snapshot = _base.state.snapshot(); + next(); + const type = _base.state.type; + const contextualKeyword = _base.state.contextualKeyword; + _base.state.restoreFromSnapshot(snapshot); + return new TypeAndKeyword(type, contextualKeyword); +} exports.lookaheadTypeAndKeyword = lookaheadTypeAndKeyword; + + function nextTokenStart() { + return nextTokenStartSince(_base.state.pos); +} exports.nextTokenStart = nextTokenStart; + + function nextTokenStartSince(pos) { + _whitespace.skipWhiteSpace.lastIndex = pos; + const skip = _whitespace.skipWhiteSpace.exec(_base.input); + return pos + skip[0].length; +} exports.nextTokenStartSince = nextTokenStartSince; + + function lookaheadCharCode() { + return _base.input.charCodeAt(nextTokenStart()); +} exports.lookaheadCharCode = lookaheadCharCode; + +// Read a single token, updating the parser object's token-related +// properties. + function nextToken() { + skipSpace(); + _base.state.start = _base.state.pos; + if (_base.state.pos >= _base.input.length) { + const tokens = _base.state.tokens; + // We normally run past the end a bit, but if we're way past the end, avoid an infinite loop. + // Also check the token positions rather than the types since sometimes we rewrite the token + // type to something else. + if ( + tokens.length >= 2 && + tokens[tokens.length - 1].start >= _base.input.length && + tokens[tokens.length - 2].start >= _base.input.length + ) { + _util.unexpected.call(void 0, "Unexpectedly reached the end of input."); + } + finishToken(_types.TokenType.eof); + return; + } + readToken(_base.input.charCodeAt(_base.state.pos)); +} exports.nextToken = nextToken; + +function readToken(code) { + // Identifier or keyword. '\uXXXX' sequences are allowed in + // identifiers, so '\' also dispatches to that. + if ( + _identifier.IS_IDENTIFIER_START[code] || + code === _charcodes.charCodes.backslash || + (code === _charcodes.charCodes.atSign && _base.input.charCodeAt(_base.state.pos + 1) === _charcodes.charCodes.atSign) + ) { + _readWord2.default.call(void 0, ); + } else { + getTokenFromCode(code); + } +} + +function skipBlockComment() { + while ( + _base.input.charCodeAt(_base.state.pos) !== _charcodes.charCodes.asterisk || + _base.input.charCodeAt(_base.state.pos + 1) !== _charcodes.charCodes.slash + ) { + _base.state.pos++; + if (_base.state.pos > _base.input.length) { + _util.unexpected.call(void 0, "Unterminated comment", _base.state.pos - 2); + return; + } + } + _base.state.pos += 2; +} + + function skipLineComment(startSkip) { + let ch = _base.input.charCodeAt((_base.state.pos += startSkip)); + if (_base.state.pos < _base.input.length) { + while ( + ch !== _charcodes.charCodes.lineFeed && + ch !== _charcodes.charCodes.carriageReturn && + ch !== _charcodes.charCodes.lineSeparator && + ch !== _charcodes.charCodes.paragraphSeparator && + ++_base.state.pos < _base.input.length + ) { + ch = _base.input.charCodeAt(_base.state.pos); + } + } +} exports.skipLineComment = skipLineComment; + +// Called at the start of the parse and after every token. Skips +// whitespace and comments. + function skipSpace() { + while (_base.state.pos < _base.input.length) { + const ch = _base.input.charCodeAt(_base.state.pos); + switch (ch) { + case _charcodes.charCodes.carriageReturn: + if (_base.input.charCodeAt(_base.state.pos + 1) === _charcodes.charCodes.lineFeed) { + ++_base.state.pos; + } + + case _charcodes.charCodes.lineFeed: + case _charcodes.charCodes.lineSeparator: + case _charcodes.charCodes.paragraphSeparator: + ++_base.state.pos; + break; + + case _charcodes.charCodes.slash: + switch (_base.input.charCodeAt(_base.state.pos + 1)) { + case _charcodes.charCodes.asterisk: + _base.state.pos += 2; + skipBlockComment(); + break; + + case _charcodes.charCodes.slash: + skipLineComment(2); + break; + + default: + return; + } + break; + + default: + if (_whitespace.IS_WHITESPACE[ch]) { + ++_base.state.pos; + } else { + return; + } + } + } +} exports.skipSpace = skipSpace; + +// Called at the end of every token. Sets various fields, and skips the space after the token, so +// that the next one's `start` will point at the right position. + function finishToken( + type, + contextualKeyword = _keywords.ContextualKeyword.NONE, +) { + _base.state.end = _base.state.pos; + _base.state.type = type; + _base.state.contextualKeyword = contextualKeyword; +} exports.finishToken = finishToken; + +// ### Token reading + +// This is the function that is called to fetch the next token. It +// is somewhat obscure, because it works in character codes rather +// than characters, and because operator parsing has been inlined +// into it. +// +// All in the name of speed. +function readToken_dot() { + const nextChar = _base.input.charCodeAt(_base.state.pos + 1); + if (nextChar >= _charcodes.charCodes.digit0 && nextChar <= _charcodes.charCodes.digit9) { + readNumber(true); + return; + } + + if (nextChar === _charcodes.charCodes.dot && _base.input.charCodeAt(_base.state.pos + 2) === _charcodes.charCodes.dot) { + _base.state.pos += 3; + finishToken(_types.TokenType.ellipsis); + } else { + ++_base.state.pos; + finishToken(_types.TokenType.dot); + } +} + +function readToken_slash() { + const nextChar = _base.input.charCodeAt(_base.state.pos + 1); + if (nextChar === _charcodes.charCodes.equalsTo) { + finishOp(_types.TokenType.assign, 2); + } else { + finishOp(_types.TokenType.slash, 1); + } +} + +function readToken_mult_modulo(code) { + // '%*' + let tokenType = code === _charcodes.charCodes.asterisk ? _types.TokenType.star : _types.TokenType.modulo; + let width = 1; + let nextChar = _base.input.charCodeAt(_base.state.pos + 1); + + // Exponentiation operator ** + if (code === _charcodes.charCodes.asterisk && nextChar === _charcodes.charCodes.asterisk) { + width++; + nextChar = _base.input.charCodeAt(_base.state.pos + 2); + tokenType = _types.TokenType.exponent; + } + + // Match *= or %=, disallowing *=> which can be valid in flow. + if ( + nextChar === _charcodes.charCodes.equalsTo && + _base.input.charCodeAt(_base.state.pos + 2) !== _charcodes.charCodes.greaterThan + ) { + width++; + tokenType = _types.TokenType.assign; + } + + finishOp(tokenType, width); +} + +function readToken_pipe_amp(code) { + // '|&' + const nextChar = _base.input.charCodeAt(_base.state.pos + 1); + + if (nextChar === code) { + if (_base.input.charCodeAt(_base.state.pos + 2) === _charcodes.charCodes.equalsTo) { + // ||= or &&= + finishOp(_types.TokenType.assign, 3); + } else { + // || or && + finishOp(code === _charcodes.charCodes.verticalBar ? _types.TokenType.logicalOR : _types.TokenType.logicalAND, 2); + } + return; + } + + if (code === _charcodes.charCodes.verticalBar) { + // '|>' + if (nextChar === _charcodes.charCodes.greaterThan) { + finishOp(_types.TokenType.pipeline, 2); + return; + } else if (nextChar === _charcodes.charCodes.rightCurlyBrace && _base.isFlowEnabled) { + // '|}' + finishOp(_types.TokenType.braceBarR, 2); + return; + } + } + + if (nextChar === _charcodes.charCodes.equalsTo) { + finishOp(_types.TokenType.assign, 2); + return; + } + + finishOp(code === _charcodes.charCodes.verticalBar ? _types.TokenType.bitwiseOR : _types.TokenType.bitwiseAND, 1); +} + +function readToken_caret() { + // '^' + const nextChar = _base.input.charCodeAt(_base.state.pos + 1); + if (nextChar === _charcodes.charCodes.equalsTo) { + finishOp(_types.TokenType.assign, 2); + } else { + finishOp(_types.TokenType.bitwiseXOR, 1); + } +} + +function readToken_plus_min(code) { + // '+-' + const nextChar = _base.input.charCodeAt(_base.state.pos + 1); + + if (nextChar === code) { + // Tentatively call this a prefix operator, but it might be changed to postfix later. + finishOp(_types.TokenType.preIncDec, 2); + return; + } + + if (nextChar === _charcodes.charCodes.equalsTo) { + finishOp(_types.TokenType.assign, 2); + } else if (code === _charcodes.charCodes.plusSign) { + finishOp(_types.TokenType.plus, 1); + } else { + finishOp(_types.TokenType.minus, 1); + } +} + +function readToken_lt() { + const nextChar = _base.input.charCodeAt(_base.state.pos + 1); + + if (nextChar === _charcodes.charCodes.lessThan) { + if (_base.input.charCodeAt(_base.state.pos + 2) === _charcodes.charCodes.equalsTo) { + finishOp(_types.TokenType.assign, 3); + return; + } + // We see <<, but need to be really careful about whether to treat it as a + // true left-shift or as two < tokens. + if (_base.state.isType) { + // Within a type, << might come up in a snippet like `Array<() => void>`, + // so treat it as two < tokens. Importantly, this should only override << + // rather than other tokens like <= . If we treated <= as < in a type + // context, then the snippet `a as T <= 1` would incorrectly start parsing + // a type argument on T. We don't need to worry about `a as T << 1` + // because TypeScript disallows that syntax. + finishOp(_types.TokenType.lessThan, 1); + } else { + // Outside a type, this might be a true left-shift operator, or it might + // still be two open-type-arg tokens, such as in `f<() => void>()`. We + // look at the token while considering the `f`, so we don't yet know that + // we're in a type context. In this case, we initially tokenize as a + // left-shift and correct after-the-fact as necessary in + // tsParseTypeArgumentsWithPossibleBitshift . + finishOp(_types.TokenType.bitShiftL, 2); + } + return; + } + + if (nextChar === _charcodes.charCodes.equalsTo) { + // <= + finishOp(_types.TokenType.relationalOrEqual, 2); + } else { + finishOp(_types.TokenType.lessThan, 1); + } +} + +function readToken_gt() { + if (_base.state.isType) { + // Avoid right-shift for things like `Array>` and + // greater-than-or-equal for things like `const a: Array=[];`. + finishOp(_types.TokenType.greaterThan, 1); + return; + } + + const nextChar = _base.input.charCodeAt(_base.state.pos + 1); + + if (nextChar === _charcodes.charCodes.greaterThan) { + const size = _base.input.charCodeAt(_base.state.pos + 2) === _charcodes.charCodes.greaterThan ? 3 : 2; + if (_base.input.charCodeAt(_base.state.pos + size) === _charcodes.charCodes.equalsTo) { + finishOp(_types.TokenType.assign, size + 1); + return; + } + finishOp(_types.TokenType.bitShiftR, size); + return; + } + + if (nextChar === _charcodes.charCodes.equalsTo) { + // >= + finishOp(_types.TokenType.relationalOrEqual, 2); + } else { + finishOp(_types.TokenType.greaterThan, 1); + } +} + +/** + * Reinterpret a possible > token when transitioning from a type to a non-type + * context. + * + * This comes up in two situations where >= needs to be treated as one token: + * - After an `as` expression, like in the code `a as T >= 1`. + * - In a type argument in an expression context, e.g. `f(a < b, c >= d)`, we + * need to see the token as >= so that we get an error and backtrack to + * normal expression parsing. + * + * Other situations require >= to be seen as two tokens, e.g. + * `const x: Array=[];`, so it's important to treat > as its own token in + * typical type parsing situations. + */ + function rescan_gt() { + if (_base.state.type === _types.TokenType.greaterThan) { + _base.state.pos -= 1; + readToken_gt(); + } +} exports.rescan_gt = rescan_gt; + +function readToken_eq_excl(code) { + // '=!' + const nextChar = _base.input.charCodeAt(_base.state.pos + 1); + if (nextChar === _charcodes.charCodes.equalsTo) { + finishOp(_types.TokenType.equality, _base.input.charCodeAt(_base.state.pos + 2) === _charcodes.charCodes.equalsTo ? 3 : 2); + return; + } + if (code === _charcodes.charCodes.equalsTo && nextChar === _charcodes.charCodes.greaterThan) { + // '=>' + _base.state.pos += 2; + finishToken(_types.TokenType.arrow); + return; + } + finishOp(code === _charcodes.charCodes.equalsTo ? _types.TokenType.eq : _types.TokenType.bang, 1); +} + +function readToken_question() { + // '?' + const nextChar = _base.input.charCodeAt(_base.state.pos + 1); + const nextChar2 = _base.input.charCodeAt(_base.state.pos + 2); + if ( + nextChar === _charcodes.charCodes.questionMark && + // In Flow (but not TypeScript), ??string is a valid type that should be + // tokenized as two individual ? tokens. + !(_base.isFlowEnabled && _base.state.isType) + ) { + if (nextChar2 === _charcodes.charCodes.equalsTo) { + // '??=' + finishOp(_types.TokenType.assign, 3); + } else { + // '??' + finishOp(_types.TokenType.nullishCoalescing, 2); + } + } else if ( + nextChar === _charcodes.charCodes.dot && + !(nextChar2 >= _charcodes.charCodes.digit0 && nextChar2 <= _charcodes.charCodes.digit9) + ) { + // '.' not followed by a number + _base.state.pos += 2; + finishToken(_types.TokenType.questionDot); + } else { + ++_base.state.pos; + finishToken(_types.TokenType.question); + } +} + + function getTokenFromCode(code) { + switch (code) { + case _charcodes.charCodes.numberSign: + ++_base.state.pos; + finishToken(_types.TokenType.hash); + return; + + // The interpretation of a dot depends on whether it is followed + // by a digit or another two dots. + + case _charcodes.charCodes.dot: + readToken_dot(); + return; + + // Punctuation tokens. + case _charcodes.charCodes.leftParenthesis: + ++_base.state.pos; + finishToken(_types.TokenType.parenL); + return; + case _charcodes.charCodes.rightParenthesis: + ++_base.state.pos; + finishToken(_types.TokenType.parenR); + return; + case _charcodes.charCodes.semicolon: + ++_base.state.pos; + finishToken(_types.TokenType.semi); + return; + case _charcodes.charCodes.comma: + ++_base.state.pos; + finishToken(_types.TokenType.comma); + return; + case _charcodes.charCodes.leftSquareBracket: + ++_base.state.pos; + finishToken(_types.TokenType.bracketL); + return; + case _charcodes.charCodes.rightSquareBracket: + ++_base.state.pos; + finishToken(_types.TokenType.bracketR); + return; + + case _charcodes.charCodes.leftCurlyBrace: + if (_base.isFlowEnabled && _base.input.charCodeAt(_base.state.pos + 1) === _charcodes.charCodes.verticalBar) { + finishOp(_types.TokenType.braceBarL, 2); + } else { + ++_base.state.pos; + finishToken(_types.TokenType.braceL); + } + return; + + case _charcodes.charCodes.rightCurlyBrace: + ++_base.state.pos; + finishToken(_types.TokenType.braceR); + return; + + case _charcodes.charCodes.colon: + if (_base.input.charCodeAt(_base.state.pos + 1) === _charcodes.charCodes.colon) { + finishOp(_types.TokenType.doubleColon, 2); + } else { + ++_base.state.pos; + finishToken(_types.TokenType.colon); + } + return; + + case _charcodes.charCodes.questionMark: + readToken_question(); + return; + case _charcodes.charCodes.atSign: + ++_base.state.pos; + finishToken(_types.TokenType.at); + return; + + case _charcodes.charCodes.graveAccent: + ++_base.state.pos; + finishToken(_types.TokenType.backQuote); + return; + + case _charcodes.charCodes.digit0: { + const nextChar = _base.input.charCodeAt(_base.state.pos + 1); + // '0x', '0X', '0o', '0O', '0b', '0B' + if ( + nextChar === _charcodes.charCodes.lowercaseX || + nextChar === _charcodes.charCodes.uppercaseX || + nextChar === _charcodes.charCodes.lowercaseO || + nextChar === _charcodes.charCodes.uppercaseO || + nextChar === _charcodes.charCodes.lowercaseB || + nextChar === _charcodes.charCodes.uppercaseB + ) { + readRadixNumber(); + return; + } + } + // Anything else beginning with a digit is an integer, octal + // number, or float. + case _charcodes.charCodes.digit1: + case _charcodes.charCodes.digit2: + case _charcodes.charCodes.digit3: + case _charcodes.charCodes.digit4: + case _charcodes.charCodes.digit5: + case _charcodes.charCodes.digit6: + case _charcodes.charCodes.digit7: + case _charcodes.charCodes.digit8: + case _charcodes.charCodes.digit9: + readNumber(false); + return; + + // Quotes produce strings. + case _charcodes.charCodes.quotationMark: + case _charcodes.charCodes.apostrophe: + readString(code); + return; + + // Operators are parsed inline in tiny state machines. '=' (charCodes.equalsTo) is + // often referred to. `finishOp` simply skips the amount of + // characters it is given as second argument, and returns a token + // of the type given by its first argument. + + case _charcodes.charCodes.slash: + readToken_slash(); + return; + + case _charcodes.charCodes.percentSign: + case _charcodes.charCodes.asterisk: + readToken_mult_modulo(code); + return; + + case _charcodes.charCodes.verticalBar: + case _charcodes.charCodes.ampersand: + readToken_pipe_amp(code); + return; + + case _charcodes.charCodes.caret: + readToken_caret(); + return; + + case _charcodes.charCodes.plusSign: + case _charcodes.charCodes.dash: + readToken_plus_min(code); + return; + + case _charcodes.charCodes.lessThan: + readToken_lt(); + return; + + case _charcodes.charCodes.greaterThan: + readToken_gt(); + return; + + case _charcodes.charCodes.equalsTo: + case _charcodes.charCodes.exclamationMark: + readToken_eq_excl(code); + return; + + case _charcodes.charCodes.tilde: + finishOp(_types.TokenType.tilde, 1); + return; + + default: + break; + } + + _util.unexpected.call(void 0, `Unexpected character '${String.fromCharCode(code)}'`, _base.state.pos); +} exports.getTokenFromCode = getTokenFromCode; + +function finishOp(type, size) { + _base.state.pos += size; + finishToken(type); +} + +function readRegexp() { + const start = _base.state.pos; + let escaped = false; + let inClass = false; + for (;;) { + if (_base.state.pos >= _base.input.length) { + _util.unexpected.call(void 0, "Unterminated regular expression", start); + return; + } + const code = _base.input.charCodeAt(_base.state.pos); + if (escaped) { + escaped = false; + } else { + if (code === _charcodes.charCodes.leftSquareBracket) { + inClass = true; + } else if (code === _charcodes.charCodes.rightSquareBracket && inClass) { + inClass = false; + } else if (code === _charcodes.charCodes.slash && !inClass) { + break; + } + escaped = code === _charcodes.charCodes.backslash; + } + ++_base.state.pos; + } + ++_base.state.pos; + // Need to use `skipWord` because '\uXXXX' sequences are allowed here (don't ask). + skipWord(); + + finishToken(_types.TokenType.regexp); +} + +/** + * Read a decimal integer. Note that this can't be unified with the similar code + * in readRadixNumber (which also handles hex digits) because "e" needs to be + * the end of the integer so that we can properly handle scientific notation. + */ +function readInt() { + while (true) { + const code = _base.input.charCodeAt(_base.state.pos); + if ((code >= _charcodes.charCodes.digit0 && code <= _charcodes.charCodes.digit9) || code === _charcodes.charCodes.underscore) { + _base.state.pos++; + } else { + break; + } + } +} + +function readRadixNumber() { + _base.state.pos += 2; // 0x + + // Walk to the end of the number, allowing hex digits. + while (true) { + const code = _base.input.charCodeAt(_base.state.pos); + if ( + (code >= _charcodes.charCodes.digit0 && code <= _charcodes.charCodes.digit9) || + (code >= _charcodes.charCodes.lowercaseA && code <= _charcodes.charCodes.lowercaseF) || + (code >= _charcodes.charCodes.uppercaseA && code <= _charcodes.charCodes.uppercaseF) || + code === _charcodes.charCodes.underscore + ) { + _base.state.pos++; + } else { + break; + } + } + + const nextChar = _base.input.charCodeAt(_base.state.pos); + if (nextChar === _charcodes.charCodes.lowercaseN) { + ++_base.state.pos; + finishToken(_types.TokenType.bigint); + } else { + finishToken(_types.TokenType.num); + } +} + +// Read an integer, octal integer, or floating-point number. +function readNumber(startsWithDot) { + let isBigInt = false; + let isDecimal = false; + + if (!startsWithDot) { + readInt(); + } + + let nextChar = _base.input.charCodeAt(_base.state.pos); + if (nextChar === _charcodes.charCodes.dot) { + ++_base.state.pos; + readInt(); + nextChar = _base.input.charCodeAt(_base.state.pos); + } + + if (nextChar === _charcodes.charCodes.uppercaseE || nextChar === _charcodes.charCodes.lowercaseE) { + nextChar = _base.input.charCodeAt(++_base.state.pos); + if (nextChar === _charcodes.charCodes.plusSign || nextChar === _charcodes.charCodes.dash) { + ++_base.state.pos; + } + readInt(); + nextChar = _base.input.charCodeAt(_base.state.pos); + } + + if (nextChar === _charcodes.charCodes.lowercaseN) { + ++_base.state.pos; + isBigInt = true; + } else if (nextChar === _charcodes.charCodes.lowercaseM) { + ++_base.state.pos; + isDecimal = true; + } + + if (isBigInt) { + finishToken(_types.TokenType.bigint); + return; + } + + if (isDecimal) { + finishToken(_types.TokenType.decimal); + return; + } + + finishToken(_types.TokenType.num); +} + +function readString(quote) { + _base.state.pos++; + for (;;) { + if (_base.state.pos >= _base.input.length) { + _util.unexpected.call(void 0, "Unterminated string constant"); + return; + } + const ch = _base.input.charCodeAt(_base.state.pos); + if (ch === _charcodes.charCodes.backslash) { + _base.state.pos++; + } else if (ch === quote) { + break; + } + _base.state.pos++; + } + _base.state.pos++; + finishToken(_types.TokenType.string); +} + +// Reads template string tokens. +function readTmplToken() { + for (;;) { + if (_base.state.pos >= _base.input.length) { + _util.unexpected.call(void 0, "Unterminated template"); + return; + } + const ch = _base.input.charCodeAt(_base.state.pos); + if ( + ch === _charcodes.charCodes.graveAccent || + (ch === _charcodes.charCodes.dollarSign && _base.input.charCodeAt(_base.state.pos + 1) === _charcodes.charCodes.leftCurlyBrace) + ) { + if (_base.state.pos === _base.state.start && match(_types.TokenType.template)) { + if (ch === _charcodes.charCodes.dollarSign) { + _base.state.pos += 2; + finishToken(_types.TokenType.dollarBraceL); + return; + } else { + ++_base.state.pos; + finishToken(_types.TokenType.backQuote); + return; + } + } + finishToken(_types.TokenType.template); + return; + } + if (ch === _charcodes.charCodes.backslash) { + _base.state.pos++; + } + _base.state.pos++; + } +} + +// Skip to the end of the current word. Note that this is the same as the snippet at the end of +// readWord, but calling skipWord from readWord seems to slightly hurt performance from some rough +// measurements. + function skipWord() { + while (_base.state.pos < _base.input.length) { + const ch = _base.input.charCodeAt(_base.state.pos); + if (_identifier.IS_IDENTIFIER_CHAR[ch]) { + _base.state.pos++; + } else if (ch === _charcodes.charCodes.backslash) { + // \u + _base.state.pos += 2; + if (_base.input.charCodeAt(_base.state.pos) === _charcodes.charCodes.leftCurlyBrace) { + while ( + _base.state.pos < _base.input.length && + _base.input.charCodeAt(_base.state.pos) !== _charcodes.charCodes.rightCurlyBrace + ) { + _base.state.pos++; + } + _base.state.pos++; + } + } else { + break; + } + } +} exports.skipWord = skipWord; Index: frontend/node_modules/sucrase/dist/parser/tokenizer/keywords.js =================================================================== --- frontend/node_modules/sucrase/dist/parser/tokenizer/keywords.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/parser/tokenizer/keywords.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,43 @@ +"use strict";Object.defineProperty(exports, "__esModule", {value: true});var ContextualKeyword; (function (ContextualKeyword) { + const NONE = 0; ContextualKeyword[ContextualKeyword["NONE"] = NONE] = "NONE"; + const _abstract = NONE + 1; ContextualKeyword[ContextualKeyword["_abstract"] = _abstract] = "_abstract"; + const _accessor = _abstract + 1; ContextualKeyword[ContextualKeyword["_accessor"] = _accessor] = "_accessor"; + const _as = _accessor + 1; ContextualKeyword[ContextualKeyword["_as"] = _as] = "_as"; + const _assert = _as + 1; ContextualKeyword[ContextualKeyword["_assert"] = _assert] = "_assert"; + const _asserts = _assert + 1; ContextualKeyword[ContextualKeyword["_asserts"] = _asserts] = "_asserts"; + const _async = _asserts + 1; ContextualKeyword[ContextualKeyword["_async"] = _async] = "_async"; + const _await = _async + 1; ContextualKeyword[ContextualKeyword["_await"] = _await] = "_await"; + const _checks = _await + 1; ContextualKeyword[ContextualKeyword["_checks"] = _checks] = "_checks"; + const _constructor = _checks + 1; ContextualKeyword[ContextualKeyword["_constructor"] = _constructor] = "_constructor"; + const _declare = _constructor + 1; ContextualKeyword[ContextualKeyword["_declare"] = _declare] = "_declare"; + const _enum = _declare + 1; ContextualKeyword[ContextualKeyword["_enum"] = _enum] = "_enum"; + const _exports = _enum + 1; ContextualKeyword[ContextualKeyword["_exports"] = _exports] = "_exports"; + const _from = _exports + 1; ContextualKeyword[ContextualKeyword["_from"] = _from] = "_from"; + const _get = _from + 1; ContextualKeyword[ContextualKeyword["_get"] = _get] = "_get"; + const _global = _get + 1; ContextualKeyword[ContextualKeyword["_global"] = _global] = "_global"; + const _implements = _global + 1; ContextualKeyword[ContextualKeyword["_implements"] = _implements] = "_implements"; + const _infer = _implements + 1; ContextualKeyword[ContextualKeyword["_infer"] = _infer] = "_infer"; + const _interface = _infer + 1; ContextualKeyword[ContextualKeyword["_interface"] = _interface] = "_interface"; + const _is = _interface + 1; ContextualKeyword[ContextualKeyword["_is"] = _is] = "_is"; + const _keyof = _is + 1; ContextualKeyword[ContextualKeyword["_keyof"] = _keyof] = "_keyof"; + const _mixins = _keyof + 1; ContextualKeyword[ContextualKeyword["_mixins"] = _mixins] = "_mixins"; + const _module = _mixins + 1; ContextualKeyword[ContextualKeyword["_module"] = _module] = "_module"; + const _namespace = _module + 1; ContextualKeyword[ContextualKeyword["_namespace"] = _namespace] = "_namespace"; + const _of = _namespace + 1; ContextualKeyword[ContextualKeyword["_of"] = _of] = "_of"; + const _opaque = _of + 1; ContextualKeyword[ContextualKeyword["_opaque"] = _opaque] = "_opaque"; + const _out = _opaque + 1; ContextualKeyword[ContextualKeyword["_out"] = _out] = "_out"; + const _override = _out + 1; ContextualKeyword[ContextualKeyword["_override"] = _override] = "_override"; + const _private = _override + 1; ContextualKeyword[ContextualKeyword["_private"] = _private] = "_private"; + const _protected = _private + 1; ContextualKeyword[ContextualKeyword["_protected"] = _protected] = "_protected"; + const _proto = _protected + 1; ContextualKeyword[ContextualKeyword["_proto"] = _proto] = "_proto"; + const _public = _proto + 1; ContextualKeyword[ContextualKeyword["_public"] = _public] = "_public"; + const _readonly = _public + 1; ContextualKeyword[ContextualKeyword["_readonly"] = _readonly] = "_readonly"; + const _require = _readonly + 1; ContextualKeyword[ContextualKeyword["_require"] = _require] = "_require"; + const _satisfies = _require + 1; ContextualKeyword[ContextualKeyword["_satisfies"] = _satisfies] = "_satisfies"; + const _set = _satisfies + 1; ContextualKeyword[ContextualKeyword["_set"] = _set] = "_set"; + const _static = _set + 1; ContextualKeyword[ContextualKeyword["_static"] = _static] = "_static"; + const _symbol = _static + 1; ContextualKeyword[ContextualKeyword["_symbol"] = _symbol] = "_symbol"; + const _type = _symbol + 1; ContextualKeyword[ContextualKeyword["_type"] = _type] = "_type"; + const _unique = _type + 1; ContextualKeyword[ContextualKeyword["_unique"] = _unique] = "_unique"; + const _using = _unique + 1; ContextualKeyword[ContextualKeyword["_using"] = _using] = "_using"; +})(ContextualKeyword || (exports.ContextualKeyword = ContextualKeyword = {})); Index: frontend/node_modules/sucrase/dist/parser/tokenizer/readWord.js =================================================================== --- frontend/node_modules/sucrase/dist/parser/tokenizer/readWord.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/parser/tokenizer/readWord.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,64 @@ +"use strict";Object.defineProperty(exports, "__esModule", {value: true});var _base = require('../traverser/base'); +var _charcodes = require('../util/charcodes'); +var _identifier = require('../util/identifier'); +var _index = require('./index'); +var _readWordTree = require('./readWordTree'); +var _types = require('./types'); + +/** + * Read an identifier, producing either a name token or matching on one of the existing keywords. + * For performance, we pre-generate big decision tree that we traverse. Each node represents a + * prefix and has 27 values, where the first value is the token or contextual token, if any (-1 if + * not), and the other 26 values are the transitions to other nodes, or -1 to stop. + */ + function readWord() { + let treePos = 0; + let code = 0; + let pos = _base.state.pos; + while (pos < _base.input.length) { + code = _base.input.charCodeAt(pos); + if (code < _charcodes.charCodes.lowercaseA || code > _charcodes.charCodes.lowercaseZ) { + break; + } + const next = _readWordTree.READ_WORD_TREE[treePos + (code - _charcodes.charCodes.lowercaseA) + 1]; + if (next === -1) { + break; + } else { + treePos = next; + pos++; + } + } + + const keywordValue = _readWordTree.READ_WORD_TREE[treePos]; + if (keywordValue > -1 && !_identifier.IS_IDENTIFIER_CHAR[code]) { + _base.state.pos = pos; + if (keywordValue & 1) { + _index.finishToken.call(void 0, keywordValue >>> 1); + } else { + _index.finishToken.call(void 0, _types.TokenType.name, keywordValue >>> 1); + } + return; + } + + while (pos < _base.input.length) { + const ch = _base.input.charCodeAt(pos); + if (_identifier.IS_IDENTIFIER_CHAR[ch]) { + pos++; + } else if (ch === _charcodes.charCodes.backslash) { + // \u + pos += 2; + if (_base.input.charCodeAt(pos) === _charcodes.charCodes.leftCurlyBrace) { + while (pos < _base.input.length && _base.input.charCodeAt(pos) !== _charcodes.charCodes.rightCurlyBrace) { + pos++; + } + pos++; + } + } else if (ch === _charcodes.charCodes.atSign && _base.input.charCodeAt(pos + 1) === _charcodes.charCodes.atSign) { + pos += 2; + } else { + break; + } + } + _base.state.pos = pos; + _index.finishToken.call(void 0, _types.TokenType.name); +} exports.default = readWord; Index: frontend/node_modules/sucrase/dist/parser/tokenizer/readWordTree.js =================================================================== --- frontend/node_modules/sucrase/dist/parser/tokenizer/readWordTree.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/parser/tokenizer/readWordTree.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,671 @@ +"use strict";Object.defineProperty(exports, "__esModule", {value: true});// Generated file, do not edit! Run "yarn generate" to re-generate this file. +var _keywords = require('./keywords'); +var _types = require('./types'); + +// prettier-ignore + const READ_WORD_TREE = new Int32Array([ + // "" + -1, 27, 783, 918, 1755, 2376, 2862, 3483, -1, 3699, -1, 4617, 4752, 4833, 5130, 5508, 5940, -1, 6480, 6939, 7749, 8181, 8451, 8613, -1, 8829, -1, + // "a" + -1, -1, 54, 243, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 432, -1, -1, -1, 675, -1, -1, -1, + // "ab" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 81, -1, -1, -1, -1, -1, -1, -1, + // "abs" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 108, -1, -1, -1, -1, -1, -1, + // "abst" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 135, -1, -1, -1, -1, -1, -1, -1, -1, + // "abstr" + -1, 162, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "abstra" + -1, -1, -1, 189, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "abstrac" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 216, -1, -1, -1, -1, -1, -1, + // "abstract" + _keywords.ContextualKeyword._abstract << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "ac" + -1, -1, -1, 270, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "acc" + -1, -1, -1, -1, -1, 297, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "acce" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 324, -1, -1, -1, -1, -1, -1, -1, + // "acces" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 351, -1, -1, -1, -1, -1, -1, -1, + // "access" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 378, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "accesso" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 405, -1, -1, -1, -1, -1, -1, -1, -1, + // "accessor" + _keywords.ContextualKeyword._accessor << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "as" + _keywords.ContextualKeyword._as << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 459, -1, -1, -1, -1, -1, 594, -1, + // "ass" + -1, -1, -1, -1, -1, 486, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "asse" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 513, -1, -1, -1, -1, -1, -1, -1, -1, + // "asser" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 540, -1, -1, -1, -1, -1, -1, + // "assert" + _keywords.ContextualKeyword._assert << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 567, -1, -1, -1, -1, -1, -1, -1, + // "asserts" + _keywords.ContextualKeyword._asserts << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "asy" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 621, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "asyn" + -1, -1, -1, 648, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "async" + _keywords.ContextualKeyword._async << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "aw" + -1, 702, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "awa" + -1, -1, -1, -1, -1, -1, -1, -1, -1, 729, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "awai" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 756, -1, -1, -1, -1, -1, -1, + // "await" + _keywords.ContextualKeyword._await << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "b" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 810, -1, -1, -1, -1, -1, -1, -1, -1, + // "br" + -1, -1, -1, -1, -1, 837, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "bre" + -1, 864, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "brea" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 891, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "break" + (_types.TokenType._break << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "c" + -1, 945, -1, -1, -1, -1, -1, -1, 1107, -1, -1, -1, 1242, -1, -1, 1350, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "ca" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 972, 1026, -1, -1, -1, -1, -1, -1, + // "cas" + -1, -1, -1, -1, -1, 999, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "case" + (_types.TokenType._case << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "cat" + -1, -1, -1, 1053, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "catc" + -1, -1, -1, -1, -1, -1, -1, -1, 1080, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "catch" + (_types.TokenType._catch << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "ch" + -1, -1, -1, -1, -1, 1134, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "che" + -1, -1, -1, 1161, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "chec" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 1188, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "check" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 1215, -1, -1, -1, -1, -1, -1, -1, + // "checks" + _keywords.ContextualKeyword._checks << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "cl" + -1, 1269, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "cla" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 1296, -1, -1, -1, -1, -1, -1, -1, + // "clas" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 1323, -1, -1, -1, -1, -1, -1, -1, + // "class" + (_types.TokenType._class << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "co" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 1377, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "con" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 1404, 1620, -1, -1, -1, -1, -1, -1, + // "cons" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 1431, -1, -1, -1, -1, -1, -1, + // "const" + (_types.TokenType._const << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 1458, -1, -1, -1, -1, -1, -1, -1, -1, + // "constr" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 1485, -1, -1, -1, -1, -1, + // "constru" + -1, -1, -1, 1512, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "construc" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 1539, -1, -1, -1, -1, -1, -1, + // "construct" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 1566, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "constructo" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 1593, -1, -1, -1, -1, -1, -1, -1, -1, + // "constructor" + _keywords.ContextualKeyword._constructor << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "cont" + -1, -1, -1, -1, -1, -1, -1, -1, -1, 1647, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "conti" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 1674, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "contin" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 1701, -1, -1, -1, -1, -1, + // "continu" + -1, -1, -1, -1, -1, 1728, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "continue" + (_types.TokenType._continue << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "d" + -1, -1, -1, -1, -1, 1782, -1, -1, -1, -1, -1, -1, -1, -1, -1, 2349, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "de" + -1, -1, 1809, 1971, -1, -1, 2106, -1, -1, -1, -1, -1, 2241, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "deb" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 1836, -1, -1, -1, -1, -1, + // "debu" + -1, -1, -1, -1, -1, -1, -1, 1863, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "debug" + -1, -1, -1, -1, -1, -1, -1, 1890, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "debugg" + -1, -1, -1, -1, -1, 1917, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "debugge" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 1944, -1, -1, -1, -1, -1, -1, -1, -1, + // "debugger" + (_types.TokenType._debugger << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "dec" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 1998, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "decl" + -1, 2025, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "decla" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 2052, -1, -1, -1, -1, -1, -1, -1, -1, + // "declar" + -1, -1, -1, -1, -1, 2079, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "declare" + _keywords.ContextualKeyword._declare << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "def" + -1, 2133, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "defa" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 2160, -1, -1, -1, -1, -1, + // "defau" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 2187, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "defaul" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 2214, -1, -1, -1, -1, -1, -1, + // "default" + (_types.TokenType._default << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "del" + -1, -1, -1, -1, -1, 2268, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "dele" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 2295, -1, -1, -1, -1, -1, -1, + // "delet" + -1, -1, -1, -1, -1, 2322, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "delete" + (_types.TokenType._delete << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "do" + (_types.TokenType._do << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "e" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 2403, -1, 2484, -1, -1, -1, -1, -1, -1, -1, -1, -1, 2565, -1, -1, + // "el" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 2430, -1, -1, -1, -1, -1, -1, -1, + // "els" + -1, -1, -1, -1, -1, 2457, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "else" + (_types.TokenType._else << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "en" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 2511, -1, -1, -1, -1, -1, + // "enu" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 2538, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "enum" + _keywords.ContextualKeyword._enum << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "ex" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 2592, -1, -1, -1, 2727, -1, -1, -1, -1, -1, -1, + // "exp" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 2619, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "expo" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 2646, -1, -1, -1, -1, -1, -1, -1, -1, + // "expor" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 2673, -1, -1, -1, -1, -1, -1, + // "export" + (_types.TokenType._export << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 2700, -1, -1, -1, -1, -1, -1, -1, + // "exports" + _keywords.ContextualKeyword._exports << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "ext" + -1, -1, -1, -1, -1, 2754, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "exte" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 2781, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "exten" + -1, -1, -1, -1, 2808, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "extend" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 2835, -1, -1, -1, -1, -1, -1, -1, + // "extends" + (_types.TokenType._extends << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "f" + -1, 2889, -1, -1, -1, -1, -1, -1, -1, 2997, -1, -1, -1, -1, -1, 3159, -1, -1, 3213, -1, -1, 3294, -1, -1, -1, -1, -1, + // "fa" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 2916, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "fal" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 2943, -1, -1, -1, -1, -1, -1, -1, + // "fals" + -1, -1, -1, -1, -1, 2970, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "false" + (_types.TokenType._false << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "fi" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 3024, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "fin" + -1, 3051, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "fina" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 3078, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "final" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 3105, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "finall" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 3132, -1, + // "finally" + (_types.TokenType._finally << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "fo" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 3186, -1, -1, -1, -1, -1, -1, -1, -1, + // "for" + (_types.TokenType._for << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "fr" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 3240, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "fro" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 3267, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "from" + _keywords.ContextualKeyword._from << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "fu" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 3321, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "fun" + -1, -1, -1, 3348, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "func" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 3375, -1, -1, -1, -1, -1, -1, + // "funct" + -1, -1, -1, -1, -1, -1, -1, -1, -1, 3402, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "functi" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 3429, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "functio" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 3456, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "function" + (_types.TokenType._function << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "g" + -1, -1, -1, -1, -1, 3510, -1, -1, -1, -1, -1, -1, 3564, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "ge" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 3537, -1, -1, -1, -1, -1, -1, + // "get" + _keywords.ContextualKeyword._get << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "gl" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 3591, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "glo" + -1, -1, 3618, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "glob" + -1, 3645, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "globa" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 3672, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "global" + _keywords.ContextualKeyword._global << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "i" + -1, -1, -1, -1, -1, -1, 3726, -1, -1, -1, -1, -1, -1, 3753, 4077, -1, -1, -1, -1, 4590, -1, -1, -1, -1, -1, -1, -1, + // "if" + (_types.TokenType._if << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "im" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 3780, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "imp" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 3807, -1, -1, 3996, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "impl" + -1, -1, -1, -1, -1, 3834, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "imple" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 3861, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "implem" + -1, -1, -1, -1, -1, 3888, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "impleme" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 3915, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "implemen" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 3942, -1, -1, -1, -1, -1, -1, + // "implement" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 3969, -1, -1, -1, -1, -1, -1, -1, + // "implements" + _keywords.ContextualKeyword._implements << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "impo" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4023, -1, -1, -1, -1, -1, -1, -1, -1, + // "impor" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4050, -1, -1, -1, -1, -1, -1, + // "import" + (_types.TokenType._import << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "in" + (_types.TokenType._in << 1) + 1, -1, -1, -1, -1, -1, 4104, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4185, 4401, -1, -1, -1, -1, -1, -1, + // "inf" + -1, -1, -1, -1, -1, 4131, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "infe" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4158, -1, -1, -1, -1, -1, -1, -1, -1, + // "infer" + _keywords.ContextualKeyword._infer << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "ins" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4212, -1, -1, -1, -1, -1, -1, + // "inst" + -1, 4239, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "insta" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4266, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "instan" + -1, -1, -1, 4293, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "instanc" + -1, -1, -1, -1, -1, 4320, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "instance" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4347, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "instanceo" + -1, -1, -1, -1, -1, -1, 4374, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "instanceof" + (_types.TokenType._instanceof << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "int" + -1, -1, -1, -1, -1, 4428, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "inte" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4455, -1, -1, -1, -1, -1, -1, -1, -1, + // "inter" + -1, -1, -1, -1, -1, -1, 4482, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "interf" + -1, 4509, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "interfa" + -1, -1, -1, 4536, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "interfac" + -1, -1, -1, -1, -1, 4563, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "interface" + _keywords.ContextualKeyword._interface << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "is" + _keywords.ContextualKeyword._is << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "k" + -1, -1, -1, -1, -1, 4644, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "ke" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4671, -1, + // "key" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4698, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "keyo" + -1, -1, -1, -1, -1, -1, 4725, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "keyof" + _keywords.ContextualKeyword._keyof << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "l" + -1, -1, -1, -1, -1, 4779, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "le" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4806, -1, -1, -1, -1, -1, -1, + // "let" + (_types.TokenType._let << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "m" + -1, -1, -1, -1, -1, -1, -1, -1, -1, 4860, -1, -1, -1, -1, -1, 4995, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "mi" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4887, -1, -1, + // "mix" + -1, -1, -1, -1, -1, -1, -1, -1, -1, 4914, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "mixi" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4941, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "mixin" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 4968, -1, -1, -1, -1, -1, -1, -1, + // "mixins" + _keywords.ContextualKeyword._mixins << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "mo" + -1, -1, -1, -1, 5022, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "mod" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 5049, -1, -1, -1, -1, -1, + // "modu" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 5076, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "modul" + -1, -1, -1, -1, -1, 5103, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "module" + _keywords.ContextualKeyword._module << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "n" + -1, 5157, -1, -1, -1, 5373, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 5427, -1, -1, -1, -1, -1, + // "na" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 5184, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "nam" + -1, -1, -1, -1, -1, 5211, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "name" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 5238, -1, -1, -1, -1, -1, -1, -1, + // "names" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 5265, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "namesp" + -1, 5292, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "namespa" + -1, -1, -1, 5319, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "namespac" + -1, -1, -1, -1, -1, 5346, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "namespace" + _keywords.ContextualKeyword._namespace << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "ne" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 5400, -1, -1, -1, + // "new" + (_types.TokenType._new << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "nu" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 5454, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "nul" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 5481, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "null" + (_types.TokenType._null << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "o" + -1, -1, -1, -1, -1, -1, 5535, -1, -1, -1, -1, -1, -1, -1, -1, -1, 5562, -1, -1, -1, -1, 5697, 5751, -1, -1, -1, -1, + // "of" + _keywords.ContextualKeyword._of << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "op" + -1, 5589, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "opa" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 5616, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "opaq" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 5643, -1, -1, -1, -1, -1, + // "opaqu" + -1, -1, -1, -1, -1, 5670, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "opaque" + _keywords.ContextualKeyword._opaque << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "ou" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 5724, -1, -1, -1, -1, -1, -1, + // "out" + _keywords.ContextualKeyword._out << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "ov" + -1, -1, -1, -1, -1, 5778, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "ove" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 5805, -1, -1, -1, -1, -1, -1, -1, -1, + // "over" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 5832, -1, -1, -1, -1, -1, -1, -1, -1, + // "overr" + -1, -1, -1, -1, -1, -1, -1, -1, -1, 5859, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "overri" + -1, -1, -1, -1, 5886, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "overrid" + -1, -1, -1, -1, -1, 5913, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "override" + _keywords.ContextualKeyword._override << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "p" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 5967, -1, -1, 6345, -1, -1, -1, -1, -1, + // "pr" + -1, -1, -1, -1, -1, -1, -1, -1, -1, 5994, -1, -1, -1, -1, -1, 6129, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "pri" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 6021, -1, -1, -1, -1, + // "priv" + -1, 6048, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "priva" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 6075, -1, -1, -1, -1, -1, -1, + // "privat" + -1, -1, -1, -1, -1, 6102, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "private" + _keywords.ContextualKeyword._private << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "pro" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 6156, -1, -1, -1, -1, -1, -1, + // "prot" + -1, -1, -1, -1, -1, 6183, -1, -1, -1, -1, -1, -1, -1, -1, -1, 6318, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "prote" + -1, -1, -1, 6210, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "protec" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 6237, -1, -1, -1, -1, -1, -1, + // "protect" + -1, -1, -1, -1, -1, 6264, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "protecte" + -1, -1, -1, -1, 6291, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "protected" + _keywords.ContextualKeyword._protected << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "proto" + _keywords.ContextualKeyword._proto << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "pu" + -1, -1, 6372, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "pub" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 6399, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "publ" + -1, -1, -1, -1, -1, -1, -1, -1, -1, 6426, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "publi" + -1, -1, -1, 6453, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "public" + _keywords.ContextualKeyword._public << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "r" + -1, -1, -1, -1, -1, 6507, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "re" + -1, 6534, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 6696, -1, -1, 6831, -1, -1, -1, -1, -1, -1, + // "rea" + -1, -1, -1, -1, 6561, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "read" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 6588, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "reado" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 6615, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "readon" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 6642, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "readonl" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 6669, -1, + // "readonly" + _keywords.ContextualKeyword._readonly << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "req" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 6723, -1, -1, -1, -1, -1, + // "requ" + -1, -1, -1, -1, -1, -1, -1, -1, -1, 6750, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "requi" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 6777, -1, -1, -1, -1, -1, -1, -1, -1, + // "requir" + -1, -1, -1, -1, -1, 6804, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "require" + _keywords.ContextualKeyword._require << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "ret" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 6858, -1, -1, -1, -1, -1, + // "retu" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 6885, -1, -1, -1, -1, -1, -1, -1, -1, + // "retur" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 6912, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "return" + (_types.TokenType._return << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "s" + -1, 6966, -1, -1, -1, 7182, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 7236, 7371, -1, 7479, -1, 7614, -1, + // "sa" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 6993, -1, -1, -1, -1, -1, -1, + // "sat" + -1, -1, -1, -1, -1, -1, -1, -1, -1, 7020, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "sati" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 7047, -1, -1, -1, -1, -1, -1, -1, + // "satis" + -1, -1, -1, -1, -1, -1, 7074, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "satisf" + -1, -1, -1, -1, -1, -1, -1, -1, -1, 7101, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "satisfi" + -1, -1, -1, -1, -1, 7128, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "satisfie" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 7155, -1, -1, -1, -1, -1, -1, -1, + // "satisfies" + _keywords.ContextualKeyword._satisfies << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "se" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 7209, -1, -1, -1, -1, -1, -1, + // "set" + _keywords.ContextualKeyword._set << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "st" + -1, 7263, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "sta" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 7290, -1, -1, -1, -1, -1, -1, + // "stat" + -1, -1, -1, -1, -1, -1, -1, -1, -1, 7317, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "stati" + -1, -1, -1, 7344, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "static" + _keywords.ContextualKeyword._static << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "su" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 7398, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "sup" + -1, -1, -1, -1, -1, 7425, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "supe" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 7452, -1, -1, -1, -1, -1, -1, -1, -1, + // "super" + (_types.TokenType._super << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "sw" + -1, -1, -1, -1, -1, -1, -1, -1, -1, 7506, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "swi" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 7533, -1, -1, -1, -1, -1, -1, + // "swit" + -1, -1, -1, 7560, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "switc" + -1, -1, -1, -1, -1, -1, -1, -1, 7587, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "switch" + (_types.TokenType._switch << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "sy" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 7641, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "sym" + -1, -1, 7668, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "symb" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 7695, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "symbo" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 7722, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "symbol" + _keywords.ContextualKeyword._symbol << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "t" + -1, -1, -1, -1, -1, -1, -1, -1, 7776, -1, -1, -1, -1, -1, -1, -1, -1, -1, 7938, -1, -1, -1, -1, -1, -1, 8046, -1, + // "th" + -1, -1, -1, -1, -1, -1, -1, -1, -1, 7803, -1, -1, -1, -1, -1, -1, -1, -1, 7857, -1, -1, -1, -1, -1, -1, -1, -1, + // "thi" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 7830, -1, -1, -1, -1, -1, -1, -1, + // "this" + (_types.TokenType._this << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "thr" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 7884, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "thro" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 7911, -1, -1, -1, + // "throw" + (_types.TokenType._throw << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "tr" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 7965, -1, -1, -1, 8019, -1, + // "tru" + -1, -1, -1, -1, -1, 7992, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "true" + (_types.TokenType._true << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "try" + (_types.TokenType._try << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "ty" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 8073, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "typ" + -1, -1, -1, -1, -1, 8100, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "type" + _keywords.ContextualKeyword._type << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 8127, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "typeo" + -1, -1, -1, -1, -1, -1, 8154, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "typeof" + (_types.TokenType._typeof << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "u" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 8208, -1, -1, -1, -1, 8343, -1, -1, -1, -1, -1, -1, -1, + // "un" + -1, -1, -1, -1, -1, -1, -1, -1, -1, 8235, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "uni" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 8262, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "uniq" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 8289, -1, -1, -1, -1, -1, + // "uniqu" + -1, -1, -1, -1, -1, 8316, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "unique" + _keywords.ContextualKeyword._unique << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "us" + -1, -1, -1, -1, -1, -1, -1, -1, -1, 8370, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "usi" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 8397, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "usin" + -1, -1, -1, -1, -1, -1, -1, 8424, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "using" + _keywords.ContextualKeyword._using << 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "v" + -1, 8478, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 8532, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "va" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 8505, -1, -1, -1, -1, -1, -1, -1, -1, + // "var" + (_types.TokenType._var << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "vo" + -1, -1, -1, -1, -1, -1, -1, -1, -1, 8559, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "voi" + -1, -1, -1, -1, 8586, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "void" + (_types.TokenType._void << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "w" + -1, -1, -1, -1, -1, -1, -1, -1, 8640, 8748, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "wh" + -1, -1, -1, -1, -1, -1, -1, -1, -1, 8667, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "whi" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 8694, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "whil" + -1, -1, -1, -1, -1, 8721, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "while" + (_types.TokenType._while << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "wi" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 8775, -1, -1, -1, -1, -1, -1, + // "wit" + -1, -1, -1, -1, -1, -1, -1, -1, 8802, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "with" + (_types.TokenType._with << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "y" + -1, -1, -1, -1, -1, -1, -1, -1, -1, 8856, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "yi" + -1, -1, -1, -1, -1, 8883, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "yie" + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 8910, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "yiel" + -1, -1, -1, -1, 8937, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // "yield" + (_types.TokenType._yield << 1) + 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, +]); exports.READ_WORD_TREE = READ_WORD_TREE; Index: frontend/node_modules/sucrase/dist/parser/tokenizer/state.js =================================================================== --- frontend/node_modules/sucrase/dist/parser/tokenizer/state.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/parser/tokenizer/state.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,106 @@ +"use strict";Object.defineProperty(exports, "__esModule", {value: true}); +var _keywords = require('./keywords'); +var _types = require('./types'); + + class Scope { + + + + + constructor(startTokenIndex, endTokenIndex, isFunctionScope) { + this.startTokenIndex = startTokenIndex; + this.endTokenIndex = endTokenIndex; + this.isFunctionScope = isFunctionScope; + } +} exports.Scope = Scope; + + class StateSnapshot { + constructor( + potentialArrowAt, + noAnonFunctionType, + inDisallowConditionalTypesContext, + tokensLength, + scopesLength, + pos, + type, + contextualKeyword, + start, + end, + isType, + scopeDepth, + error, + ) {;this.potentialArrowAt = potentialArrowAt;this.noAnonFunctionType = noAnonFunctionType;this.inDisallowConditionalTypesContext = inDisallowConditionalTypesContext;this.tokensLength = tokensLength;this.scopesLength = scopesLength;this.pos = pos;this.type = type;this.contextualKeyword = contextualKeyword;this.start = start;this.end = end;this.isType = isType;this.scopeDepth = scopeDepth;this.error = error;} +} exports.StateSnapshot = StateSnapshot; + + class State {constructor() { State.prototype.__init.call(this);State.prototype.__init2.call(this);State.prototype.__init3.call(this);State.prototype.__init4.call(this);State.prototype.__init5.call(this);State.prototype.__init6.call(this);State.prototype.__init7.call(this);State.prototype.__init8.call(this);State.prototype.__init9.call(this);State.prototype.__init10.call(this);State.prototype.__init11.call(this);State.prototype.__init12.call(this);State.prototype.__init13.call(this); } + // Used to signify the start of a potential arrow function + __init() {this.potentialArrowAt = -1} + + // Used by Flow to handle an edge case involving function type parsing. + __init2() {this.noAnonFunctionType = false} + + // Used by TypeScript to handle ambiguities when parsing conditional types. + __init3() {this.inDisallowConditionalTypesContext = false} + + // Token store. + __init4() {this.tokens = []} + + // Array of all observed scopes, ordered by their ending position. + __init5() {this.scopes = []} + + // The current position of the tokenizer in the input. + __init6() {this.pos = 0} + + // Information about the current token. + __init7() {this.type = _types.TokenType.eof} + __init8() {this.contextualKeyword = _keywords.ContextualKeyword.NONE} + __init9() {this.start = 0} + __init10() {this.end = 0} + + __init11() {this.isType = false} + __init12() {this.scopeDepth = 0} + + /** + * If the parser is in an error state, then the token is always tt.eof and all functions can + * keep executing but should be written so they don't get into an infinite loop in this situation. + * + * This approach, combined with the ability to snapshot and restore state, allows us to implement + * backtracking without exceptions and without needing to explicitly propagate error states + * everywhere. + */ + __init13() {this.error = null} + + snapshot() { + return new StateSnapshot( + this.potentialArrowAt, + this.noAnonFunctionType, + this.inDisallowConditionalTypesContext, + this.tokens.length, + this.scopes.length, + this.pos, + this.type, + this.contextualKeyword, + this.start, + this.end, + this.isType, + this.scopeDepth, + this.error, + ); + } + + restoreFromSnapshot(snapshot) { + this.potentialArrowAt = snapshot.potentialArrowAt; + this.noAnonFunctionType = snapshot.noAnonFunctionType; + this.inDisallowConditionalTypesContext = snapshot.inDisallowConditionalTypesContext; + this.tokens.length = snapshot.tokensLength; + this.scopes.length = snapshot.scopesLength; + this.pos = snapshot.pos; + this.type = snapshot.type; + this.contextualKeyword = snapshot.contextualKeyword; + this.start = snapshot.start; + this.end = snapshot.end; + this.isType = snapshot.isType; + this.scopeDepth = snapshot.scopeDepth; + this.error = snapshot.error; + } +} exports.default = State; Index: frontend/node_modules/sucrase/dist/parser/tokenizer/types.js =================================================================== --- frontend/node_modules/sucrase/dist/parser/tokenizer/types.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/parser/tokenizer/types.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,361 @@ +"use strict";Object.defineProperty(exports, "__esModule", {value: true});// Generated file, do not edit! Run "yarn generate" to re-generate this file. +/* istanbul ignore file */ +/** + * Enum of all token types, with bit fields to signify meaningful properties. + */ +var TokenType; (function (TokenType) { + // Precedence 0 means not an operator; otherwise it is a positive number up to 12. + const PRECEDENCE_MASK = 0xf; TokenType[TokenType["PRECEDENCE_MASK"] = PRECEDENCE_MASK] = "PRECEDENCE_MASK"; + const IS_KEYWORD = 1 << 4; TokenType[TokenType["IS_KEYWORD"] = IS_KEYWORD] = "IS_KEYWORD"; + const IS_ASSIGN = 1 << 5; TokenType[TokenType["IS_ASSIGN"] = IS_ASSIGN] = "IS_ASSIGN"; + const IS_RIGHT_ASSOCIATIVE = 1 << 6; TokenType[TokenType["IS_RIGHT_ASSOCIATIVE"] = IS_RIGHT_ASSOCIATIVE] = "IS_RIGHT_ASSOCIATIVE"; + const IS_PREFIX = 1 << 7; TokenType[TokenType["IS_PREFIX"] = IS_PREFIX] = "IS_PREFIX"; + const IS_POSTFIX = 1 << 8; TokenType[TokenType["IS_POSTFIX"] = IS_POSTFIX] = "IS_POSTFIX"; + const IS_EXPRESSION_START = 1 << 9; TokenType[TokenType["IS_EXPRESSION_START"] = IS_EXPRESSION_START] = "IS_EXPRESSION_START"; + + const num = 512; TokenType[TokenType["num"] = num] = "num"; // num startsExpr + const bigint = 1536; TokenType[TokenType["bigint"] = bigint] = "bigint"; // bigint startsExpr + const decimal = 2560; TokenType[TokenType["decimal"] = decimal] = "decimal"; // decimal startsExpr + const regexp = 3584; TokenType[TokenType["regexp"] = regexp] = "regexp"; // regexp startsExpr + const string = 4608; TokenType[TokenType["string"] = string] = "string"; // string startsExpr + const name = 5632; TokenType[TokenType["name"] = name] = "name"; // name startsExpr + const eof = 6144; TokenType[TokenType["eof"] = eof] = "eof"; // eof + const bracketL = 7680; TokenType[TokenType["bracketL"] = bracketL] = "bracketL"; // [ startsExpr + const bracketR = 8192; TokenType[TokenType["bracketR"] = bracketR] = "bracketR"; // ] + const braceL = 9728; TokenType[TokenType["braceL"] = braceL] = "braceL"; // { startsExpr + const braceBarL = 10752; TokenType[TokenType["braceBarL"] = braceBarL] = "braceBarL"; // {| startsExpr + const braceR = 11264; TokenType[TokenType["braceR"] = braceR] = "braceR"; // } + const braceBarR = 12288; TokenType[TokenType["braceBarR"] = braceBarR] = "braceBarR"; // |} + const parenL = 13824; TokenType[TokenType["parenL"] = parenL] = "parenL"; // ( startsExpr + const parenR = 14336; TokenType[TokenType["parenR"] = parenR] = "parenR"; // ) + const comma = 15360; TokenType[TokenType["comma"] = comma] = "comma"; // , + const semi = 16384; TokenType[TokenType["semi"] = semi] = "semi"; // ; + const colon = 17408; TokenType[TokenType["colon"] = colon] = "colon"; // : + const doubleColon = 18432; TokenType[TokenType["doubleColon"] = doubleColon] = "doubleColon"; // :: + const dot = 19456; TokenType[TokenType["dot"] = dot] = "dot"; // . + const question = 20480; TokenType[TokenType["question"] = question] = "question"; // ? + const questionDot = 21504; TokenType[TokenType["questionDot"] = questionDot] = "questionDot"; // ?. + const arrow = 22528; TokenType[TokenType["arrow"] = arrow] = "arrow"; // => + const template = 23552; TokenType[TokenType["template"] = template] = "template"; // template + const ellipsis = 24576; TokenType[TokenType["ellipsis"] = ellipsis] = "ellipsis"; // ... + const backQuote = 25600; TokenType[TokenType["backQuote"] = backQuote] = "backQuote"; // ` + const dollarBraceL = 27136; TokenType[TokenType["dollarBraceL"] = dollarBraceL] = "dollarBraceL"; // ${ startsExpr + const at = 27648; TokenType[TokenType["at"] = at] = "at"; // @ + const hash = 29184; TokenType[TokenType["hash"] = hash] = "hash"; // # startsExpr + const eq = 29728; TokenType[TokenType["eq"] = eq] = "eq"; // = isAssign + const assign = 30752; TokenType[TokenType["assign"] = assign] = "assign"; // _= isAssign + const preIncDec = 32640; TokenType[TokenType["preIncDec"] = preIncDec] = "preIncDec"; // ++/-- prefix postfix startsExpr + const postIncDec = 33664; TokenType[TokenType["postIncDec"] = postIncDec] = "postIncDec"; // ++/-- prefix postfix startsExpr + const bang = 34432; TokenType[TokenType["bang"] = bang] = "bang"; // ! prefix startsExpr + const tilde = 35456; TokenType[TokenType["tilde"] = tilde] = "tilde"; // ~ prefix startsExpr + const pipeline = 35841; TokenType[TokenType["pipeline"] = pipeline] = "pipeline"; // |> prec:1 + const nullishCoalescing = 36866; TokenType[TokenType["nullishCoalescing"] = nullishCoalescing] = "nullishCoalescing"; // ?? prec:2 + const logicalOR = 37890; TokenType[TokenType["logicalOR"] = logicalOR] = "logicalOR"; // || prec:2 + const logicalAND = 38915; TokenType[TokenType["logicalAND"] = logicalAND] = "logicalAND"; // && prec:3 + const bitwiseOR = 39940; TokenType[TokenType["bitwiseOR"] = bitwiseOR] = "bitwiseOR"; // | prec:4 + const bitwiseXOR = 40965; TokenType[TokenType["bitwiseXOR"] = bitwiseXOR] = "bitwiseXOR"; // ^ prec:5 + const bitwiseAND = 41990; TokenType[TokenType["bitwiseAND"] = bitwiseAND] = "bitwiseAND"; // & prec:6 + const equality = 43015; TokenType[TokenType["equality"] = equality] = "equality"; // ==/!= prec:7 + const lessThan = 44040; TokenType[TokenType["lessThan"] = lessThan] = "lessThan"; // < prec:8 + const greaterThan = 45064; TokenType[TokenType["greaterThan"] = greaterThan] = "greaterThan"; // > prec:8 + const relationalOrEqual = 46088; TokenType[TokenType["relationalOrEqual"] = relationalOrEqual] = "relationalOrEqual"; // <=/>= prec:8 + const bitShiftL = 47113; TokenType[TokenType["bitShiftL"] = bitShiftL] = "bitShiftL"; // << prec:9 + const bitShiftR = 48137; TokenType[TokenType["bitShiftR"] = bitShiftR] = "bitShiftR"; // >>/>>> prec:9 + const plus = 49802; TokenType[TokenType["plus"] = plus] = "plus"; // + prec:10 prefix startsExpr + const minus = 50826; TokenType[TokenType["minus"] = minus] = "minus"; // - prec:10 prefix startsExpr + const modulo = 51723; TokenType[TokenType["modulo"] = modulo] = "modulo"; // % prec:11 startsExpr + const star = 52235; TokenType[TokenType["star"] = star] = "star"; // * prec:11 + const slash = 53259; TokenType[TokenType["slash"] = slash] = "slash"; // / prec:11 + const exponent = 54348; TokenType[TokenType["exponent"] = exponent] = "exponent"; // ** prec:12 rightAssociative + const jsxName = 55296; TokenType[TokenType["jsxName"] = jsxName] = "jsxName"; // jsxName + const jsxText = 56320; TokenType[TokenType["jsxText"] = jsxText] = "jsxText"; // jsxText + const jsxEmptyText = 57344; TokenType[TokenType["jsxEmptyText"] = jsxEmptyText] = "jsxEmptyText"; // jsxEmptyText + const jsxTagStart = 58880; TokenType[TokenType["jsxTagStart"] = jsxTagStart] = "jsxTagStart"; // jsxTagStart startsExpr + const jsxTagEnd = 59392; TokenType[TokenType["jsxTagEnd"] = jsxTagEnd] = "jsxTagEnd"; // jsxTagEnd + const typeParameterStart = 60928; TokenType[TokenType["typeParameterStart"] = typeParameterStart] = "typeParameterStart"; // typeParameterStart startsExpr + const nonNullAssertion = 61440; TokenType[TokenType["nonNullAssertion"] = nonNullAssertion] = "nonNullAssertion"; // nonNullAssertion + const _break = 62480; TokenType[TokenType["_break"] = _break] = "_break"; // break keyword + const _case = 63504; TokenType[TokenType["_case"] = _case] = "_case"; // case keyword + const _catch = 64528; TokenType[TokenType["_catch"] = _catch] = "_catch"; // catch keyword + const _continue = 65552; TokenType[TokenType["_continue"] = _continue] = "_continue"; // continue keyword + const _debugger = 66576; TokenType[TokenType["_debugger"] = _debugger] = "_debugger"; // debugger keyword + const _default = 67600; TokenType[TokenType["_default"] = _default] = "_default"; // default keyword + const _do = 68624; TokenType[TokenType["_do"] = _do] = "_do"; // do keyword + const _else = 69648; TokenType[TokenType["_else"] = _else] = "_else"; // else keyword + const _finally = 70672; TokenType[TokenType["_finally"] = _finally] = "_finally"; // finally keyword + const _for = 71696; TokenType[TokenType["_for"] = _for] = "_for"; // for keyword + const _function = 73232; TokenType[TokenType["_function"] = _function] = "_function"; // function keyword startsExpr + const _if = 73744; TokenType[TokenType["_if"] = _if] = "_if"; // if keyword + const _return = 74768; TokenType[TokenType["_return"] = _return] = "_return"; // return keyword + const _switch = 75792; TokenType[TokenType["_switch"] = _switch] = "_switch"; // switch keyword + const _throw = 77456; TokenType[TokenType["_throw"] = _throw] = "_throw"; // throw keyword prefix startsExpr + const _try = 77840; TokenType[TokenType["_try"] = _try] = "_try"; // try keyword + const _var = 78864; TokenType[TokenType["_var"] = _var] = "_var"; // var keyword + const _let = 79888; TokenType[TokenType["_let"] = _let] = "_let"; // let keyword + const _const = 80912; TokenType[TokenType["_const"] = _const] = "_const"; // const keyword + const _while = 81936; TokenType[TokenType["_while"] = _while] = "_while"; // while keyword + const _with = 82960; TokenType[TokenType["_with"] = _with] = "_with"; // with keyword + const _new = 84496; TokenType[TokenType["_new"] = _new] = "_new"; // new keyword startsExpr + const _this = 85520; TokenType[TokenType["_this"] = _this] = "_this"; // this keyword startsExpr + const _super = 86544; TokenType[TokenType["_super"] = _super] = "_super"; // super keyword startsExpr + const _class = 87568; TokenType[TokenType["_class"] = _class] = "_class"; // class keyword startsExpr + const _extends = 88080; TokenType[TokenType["_extends"] = _extends] = "_extends"; // extends keyword + const _export = 89104; TokenType[TokenType["_export"] = _export] = "_export"; // export keyword + const _import = 90640; TokenType[TokenType["_import"] = _import] = "_import"; // import keyword startsExpr + const _yield = 91664; TokenType[TokenType["_yield"] = _yield] = "_yield"; // yield keyword startsExpr + const _null = 92688; TokenType[TokenType["_null"] = _null] = "_null"; // null keyword startsExpr + const _true = 93712; TokenType[TokenType["_true"] = _true] = "_true"; // true keyword startsExpr + const _false = 94736; TokenType[TokenType["_false"] = _false] = "_false"; // false keyword startsExpr + const _in = 95256; TokenType[TokenType["_in"] = _in] = "_in"; // in prec:8 keyword + const _instanceof = 96280; TokenType[TokenType["_instanceof"] = _instanceof] = "_instanceof"; // instanceof prec:8 keyword + const _typeof = 97936; TokenType[TokenType["_typeof"] = _typeof] = "_typeof"; // typeof keyword prefix startsExpr + const _void = 98960; TokenType[TokenType["_void"] = _void] = "_void"; // void keyword prefix startsExpr + const _delete = 99984; TokenType[TokenType["_delete"] = _delete] = "_delete"; // delete keyword prefix startsExpr + const _async = 100880; TokenType[TokenType["_async"] = _async] = "_async"; // async keyword startsExpr + const _get = 101904; TokenType[TokenType["_get"] = _get] = "_get"; // get keyword startsExpr + const _set = 102928; TokenType[TokenType["_set"] = _set] = "_set"; // set keyword startsExpr + const _declare = 103952; TokenType[TokenType["_declare"] = _declare] = "_declare"; // declare keyword startsExpr + const _readonly = 104976; TokenType[TokenType["_readonly"] = _readonly] = "_readonly"; // readonly keyword startsExpr + const _abstract = 106000; TokenType[TokenType["_abstract"] = _abstract] = "_abstract"; // abstract keyword startsExpr + const _static = 107024; TokenType[TokenType["_static"] = _static] = "_static"; // static keyword startsExpr + const _public = 107536; TokenType[TokenType["_public"] = _public] = "_public"; // public keyword + const _private = 108560; TokenType[TokenType["_private"] = _private] = "_private"; // private keyword + const _protected = 109584; TokenType[TokenType["_protected"] = _protected] = "_protected"; // protected keyword + const _override = 110608; TokenType[TokenType["_override"] = _override] = "_override"; // override keyword + const _as = 112144; TokenType[TokenType["_as"] = _as] = "_as"; // as keyword startsExpr + const _enum = 113168; TokenType[TokenType["_enum"] = _enum] = "_enum"; // enum keyword startsExpr + const _type = 114192; TokenType[TokenType["_type"] = _type] = "_type"; // type keyword startsExpr + const _implements = 115216; TokenType[TokenType["_implements"] = _implements] = "_implements"; // implements keyword startsExpr +})(TokenType || (exports.TokenType = TokenType = {})); + function formatTokenType(tokenType) { + switch (tokenType) { + case TokenType.num: + return "num"; + case TokenType.bigint: + return "bigint"; + case TokenType.decimal: + return "decimal"; + case TokenType.regexp: + return "regexp"; + case TokenType.string: + return "string"; + case TokenType.name: + return "name"; + case TokenType.eof: + return "eof"; + case TokenType.bracketL: + return "["; + case TokenType.bracketR: + return "]"; + case TokenType.braceL: + return "{"; + case TokenType.braceBarL: + return "{|"; + case TokenType.braceR: + return "}"; + case TokenType.braceBarR: + return "|}"; + case TokenType.parenL: + return "("; + case TokenType.parenR: + return ")"; + case TokenType.comma: + return ","; + case TokenType.semi: + return ";"; + case TokenType.colon: + return ":"; + case TokenType.doubleColon: + return "::"; + case TokenType.dot: + return "."; + case TokenType.question: + return "?"; + case TokenType.questionDot: + return "?."; + case TokenType.arrow: + return "=>"; + case TokenType.template: + return "template"; + case TokenType.ellipsis: + return "..."; + case TokenType.backQuote: + return "`"; + case TokenType.dollarBraceL: + return "${"; + case TokenType.at: + return "@"; + case TokenType.hash: + return "#"; + case TokenType.eq: + return "="; + case TokenType.assign: + return "_="; + case TokenType.preIncDec: + return "++/--"; + case TokenType.postIncDec: + return "++/--"; + case TokenType.bang: + return "!"; + case TokenType.tilde: + return "~"; + case TokenType.pipeline: + return "|>"; + case TokenType.nullishCoalescing: + return "??"; + case TokenType.logicalOR: + return "||"; + case TokenType.logicalAND: + return "&&"; + case TokenType.bitwiseOR: + return "|"; + case TokenType.bitwiseXOR: + return "^"; + case TokenType.bitwiseAND: + return "&"; + case TokenType.equality: + return "==/!="; + case TokenType.lessThan: + return "<"; + case TokenType.greaterThan: + return ">"; + case TokenType.relationalOrEqual: + return "<=/>="; + case TokenType.bitShiftL: + return "<<"; + case TokenType.bitShiftR: + return ">>/>>>"; + case TokenType.plus: + return "+"; + case TokenType.minus: + return "-"; + case TokenType.modulo: + return "%"; + case TokenType.star: + return "*"; + case TokenType.slash: + return "/"; + case TokenType.exponent: + return "**"; + case TokenType.jsxName: + return "jsxName"; + case TokenType.jsxText: + return "jsxText"; + case TokenType.jsxEmptyText: + return "jsxEmptyText"; + case TokenType.jsxTagStart: + return "jsxTagStart"; + case TokenType.jsxTagEnd: + return "jsxTagEnd"; + case TokenType.typeParameterStart: + return "typeParameterStart"; + case TokenType.nonNullAssertion: + return "nonNullAssertion"; + case TokenType._break: + return "break"; + case TokenType._case: + return "case"; + case TokenType._catch: + return "catch"; + case TokenType._continue: + return "continue"; + case TokenType._debugger: + return "debugger"; + case TokenType._default: + return "default"; + case TokenType._do: + return "do"; + case TokenType._else: + return "else"; + case TokenType._finally: + return "finally"; + case TokenType._for: + return "for"; + case TokenType._function: + return "function"; + case TokenType._if: + return "if"; + case TokenType._return: + return "return"; + case TokenType._switch: + return "switch"; + case TokenType._throw: + return "throw"; + case TokenType._try: + return "try"; + case TokenType._var: + return "var"; + case TokenType._let: + return "let"; + case TokenType._const: + return "const"; + case TokenType._while: + return "while"; + case TokenType._with: + return "with"; + case TokenType._new: + return "new"; + case TokenType._this: + return "this"; + case TokenType._super: + return "super"; + case TokenType._class: + return "class"; + case TokenType._extends: + return "extends"; + case TokenType._export: + return "export"; + case TokenType._import: + return "import"; + case TokenType._yield: + return "yield"; + case TokenType._null: + return "null"; + case TokenType._true: + return "true"; + case TokenType._false: + return "false"; + case TokenType._in: + return "in"; + case TokenType._instanceof: + return "instanceof"; + case TokenType._typeof: + return "typeof"; + case TokenType._void: + return "void"; + case TokenType._delete: + return "delete"; + case TokenType._async: + return "async"; + case TokenType._get: + return "get"; + case TokenType._set: + return "set"; + case TokenType._declare: + return "declare"; + case TokenType._readonly: + return "readonly"; + case TokenType._abstract: + return "abstract"; + case TokenType._static: + return "static"; + case TokenType._public: + return "public"; + case TokenType._private: + return "private"; + case TokenType._protected: + return "protected"; + case TokenType._override: + return "override"; + case TokenType._as: + return "as"; + case TokenType._enum: + return "enum"; + case TokenType._type: + return "type"; + case TokenType._implements: + return "implements"; + default: + return ""; + } +} exports.formatTokenType = formatTokenType; Index: frontend/node_modules/sucrase/dist/parser/traverser/base.js =================================================================== --- frontend/node_modules/sucrase/dist/parser/traverser/base.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/parser/traverser/base.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,60 @@ +"use strict";Object.defineProperty(exports, "__esModule", {value: true}); function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }var _state = require('../tokenizer/state'); var _state2 = _interopRequireDefault(_state); +var _charcodes = require('../util/charcodes'); + + exports.isJSXEnabled; + exports.isTypeScriptEnabled; + exports.isFlowEnabled; + exports.state; + exports.input; + exports.nextContextId; + + function getNextContextId() { + return exports.nextContextId++; +} exports.getNextContextId = getNextContextId; + +// eslint-disable-next-line @typescript-eslint/no-explicit-any + function augmentError(error) { + if ("pos" in error) { + const loc = locationForIndex(error.pos); + error.message += ` (${loc.line}:${loc.column})`; + error.loc = loc; + } + return error; +} exports.augmentError = augmentError; + + class Loc { + + + constructor(line, column) { + this.line = line; + this.column = column; + } +} exports.Loc = Loc; + + function locationForIndex(pos) { + let line = 1; + let column = 1; + for (let i = 0; i < pos; i++) { + if (exports.input.charCodeAt(i) === _charcodes.charCodes.lineFeed) { + line++; + column = 1; + } else { + column++; + } + } + return new Loc(line, column); +} exports.locationForIndex = locationForIndex; + + function initParser( + inputCode, + isJSXEnabledArg, + isTypeScriptEnabledArg, + isFlowEnabledArg, +) { + exports.input = inputCode; + exports.state = new (0, _state2.default)(); + exports.nextContextId = 1; + exports.isJSXEnabled = isJSXEnabledArg; + exports.isTypeScriptEnabled = isTypeScriptEnabledArg; + exports.isFlowEnabled = isFlowEnabledArg; +} exports.initParser = initParser; Index: frontend/node_modules/sucrase/dist/parser/traverser/expression.js =================================================================== --- frontend/node_modules/sucrase/dist/parser/traverser/expression.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/parser/traverser/expression.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,1022 @@ +"use strict";Object.defineProperty(exports, "__esModule", {value: true});/* eslint max-len: 0 */ + +// A recursive descent parser operates by defining functions for all +// syntactic elements, and recursively calling those, each function +// advancing the input stream and returning an AST node. Precedence +// of constructs (for example, the fact that `!x[1]` means `!(x[1])` +// instead of `(!x)[1]` is handled by the fact that the parser +// function that parses unary prefix operators is called first, and +// in turn calls the function that parses `[]` subscripts — that +// way, it'll receive the node for `x[1]` already parsed, and wraps +// *that* in the unary operator node. +// +// Acorn uses an [operator precedence parser][opp] to handle binary +// operator precedence, because it is much more compact than using +// the technique outlined above, which uses different, nesting +// functions to specify precedence, for all of the ten binary +// precedence levels that JavaScript defines. +// +// [opp]: http://en.wikipedia.org/wiki/Operator-precedence_parser + + + + + + + + + + + +var _flow = require('../plugins/flow'); +var _index = require('../plugins/jsx/index'); +var _types = require('../plugins/types'); + + + + + + + + + +var _typescript = require('../plugins/typescript'); + + + + + + + + + + + + +var _index3 = require('../tokenizer/index'); +var _keywords = require('../tokenizer/keywords'); +var _state = require('../tokenizer/state'); +var _types3 = require('../tokenizer/types'); +var _charcodes = require('../util/charcodes'); +var _identifier = require('../util/identifier'); +var _base = require('./base'); + + + + + + +var _lval = require('./lval'); + + + + + + + +var _statement = require('./statement'); + + + + + + + + + +var _util = require('./util'); + + class StopState { + + constructor(stop) { + this.stop = stop; + } +} exports.StopState = StopState; + +// ### Expression parsing + +// These nest, from the most general expression type at the top to +// 'atomic', nondivisible expression types at the bottom. Most of +// the functions will simply let the function (s) below them parse, +// and, *if* the syntactic construct they handle is present, wrap +// the AST node that the inner parser gave them in another node. + function parseExpression(noIn = false) { + parseMaybeAssign(noIn); + if (_index3.match.call(void 0, _types3.TokenType.comma)) { + while (_index3.eat.call(void 0, _types3.TokenType.comma)) { + parseMaybeAssign(noIn); + } + } +} exports.parseExpression = parseExpression; + +/** + * noIn is used when parsing a for loop so that we don't interpret a following "in" as the binary + * operatior. + * isWithinParens is used to indicate that we're parsing something that might be a comma expression + * or might be an arrow function or might be a Flow type assertion (which requires explicit parens). + * In these cases, we should allow : and ?: after the initial "left" part. + */ + function parseMaybeAssign(noIn = false, isWithinParens = false) { + if (_base.isTypeScriptEnabled) { + return _typescript.tsParseMaybeAssign.call(void 0, noIn, isWithinParens); + } else if (_base.isFlowEnabled) { + return _flow.flowParseMaybeAssign.call(void 0, noIn, isWithinParens); + } else { + return baseParseMaybeAssign(noIn, isWithinParens); + } +} exports.parseMaybeAssign = parseMaybeAssign; + +// Parse an assignment expression. This includes applications of +// operators like `+=`. +// Returns true if the expression was an arrow function. + function baseParseMaybeAssign(noIn, isWithinParens) { + if (_index3.match.call(void 0, _types3.TokenType._yield)) { + parseYield(); + return false; + } + + if (_index3.match.call(void 0, _types3.TokenType.parenL) || _index3.match.call(void 0, _types3.TokenType.name) || _index3.match.call(void 0, _types3.TokenType._yield)) { + _base.state.potentialArrowAt = _base.state.start; + } + + const wasArrow = parseMaybeConditional(noIn); + if (isWithinParens) { + parseParenItem(); + } + if (_base.state.type & _types3.TokenType.IS_ASSIGN) { + _index3.next.call(void 0, ); + parseMaybeAssign(noIn); + return false; + } + return wasArrow; +} exports.baseParseMaybeAssign = baseParseMaybeAssign; + +// Parse a ternary conditional (`?:`) operator. +// Returns true if the expression was an arrow function. +function parseMaybeConditional(noIn) { + const wasArrow = parseExprOps(noIn); + if (wasArrow) { + return true; + } + parseConditional(noIn); + return false; +} + +function parseConditional(noIn) { + if (_base.isTypeScriptEnabled || _base.isFlowEnabled) { + _types.typedParseConditional.call(void 0, noIn); + } else { + baseParseConditional(noIn); + } +} + + function baseParseConditional(noIn) { + if (_index3.eat.call(void 0, _types3.TokenType.question)) { + parseMaybeAssign(); + _util.expect.call(void 0, _types3.TokenType.colon); + parseMaybeAssign(noIn); + } +} exports.baseParseConditional = baseParseConditional; + +// Start the precedence parser. +// Returns true if this was an arrow function +function parseExprOps(noIn) { + const startTokenIndex = _base.state.tokens.length; + const wasArrow = parseMaybeUnary(); + if (wasArrow) { + return true; + } + parseExprOp(startTokenIndex, -1, noIn); + return false; +} + +// Parse binary operators with the operator precedence parsing +// algorithm. `left` is the left-hand side of the operator. +// `minPrec` provides context that allows the function to stop and +// defer further parser to one of its callers when it encounters an +// operator that has a lower precedence than the set it is parsing. +function parseExprOp(startTokenIndex, minPrec, noIn) { + if ( + _base.isTypeScriptEnabled && + (_types3.TokenType._in & _types3.TokenType.PRECEDENCE_MASK) > minPrec && + !_util.hasPrecedingLineBreak.call(void 0, ) && + (_util.eatContextual.call(void 0, _keywords.ContextualKeyword._as) || _util.eatContextual.call(void 0, _keywords.ContextualKeyword._satisfies)) + ) { + const oldIsType = _index3.pushTypeContext.call(void 0, 1); + _typescript.tsParseType.call(void 0, ); + _index3.popTypeContext.call(void 0, oldIsType); + _index3.rescan_gt.call(void 0, ); + parseExprOp(startTokenIndex, minPrec, noIn); + return; + } + + const prec = _base.state.type & _types3.TokenType.PRECEDENCE_MASK; + if (prec > 0 && (!noIn || !_index3.match.call(void 0, _types3.TokenType._in))) { + if (prec > minPrec) { + const op = _base.state.type; + _index3.next.call(void 0, ); + if (op === _types3.TokenType.nullishCoalescing) { + _base.state.tokens[_base.state.tokens.length - 1].nullishStartIndex = startTokenIndex; + } + + const rhsStartTokenIndex = _base.state.tokens.length; + parseMaybeUnary(); + // Extend the right operand of this operator if possible. + parseExprOp(rhsStartTokenIndex, op & _types3.TokenType.IS_RIGHT_ASSOCIATIVE ? prec - 1 : prec, noIn); + if (op === _types3.TokenType.nullishCoalescing) { + _base.state.tokens[startTokenIndex].numNullishCoalesceStarts++; + _base.state.tokens[_base.state.tokens.length - 1].numNullishCoalesceEnds++; + } + // Continue with any future operator holding this expression as the left operand. + parseExprOp(startTokenIndex, minPrec, noIn); + } + } +} + +// Parse unary operators, both prefix and postfix. +// Returns true if this was an arrow function. + function parseMaybeUnary() { + if (_base.isTypeScriptEnabled && !_base.isJSXEnabled && _index3.eat.call(void 0, _types3.TokenType.lessThan)) { + _typescript.tsParseTypeAssertion.call(void 0, ); + return false; + } + if ( + _util.isContextual.call(void 0, _keywords.ContextualKeyword._module) && + _index3.lookaheadCharCode.call(void 0, ) === _charcodes.charCodes.leftCurlyBrace && + !_util.hasFollowingLineBreak.call(void 0, ) + ) { + parseModuleExpression(); + return false; + } + if (_base.state.type & _types3.TokenType.IS_PREFIX) { + _index3.next.call(void 0, ); + parseMaybeUnary(); + return false; + } + + const wasArrow = parseExprSubscripts(); + if (wasArrow) { + return true; + } + while (_base.state.type & _types3.TokenType.IS_POSTFIX && !_util.canInsertSemicolon.call(void 0, )) { + // The tokenizer calls everything a preincrement, so make it a postincrement when + // we see it in that context. + if (_base.state.type === _types3.TokenType.preIncDec) { + _base.state.type = _types3.TokenType.postIncDec; + } + _index3.next.call(void 0, ); + } + return false; +} exports.parseMaybeUnary = parseMaybeUnary; + +// Parse call, dot, and `[]`-subscript expressions. +// Returns true if this was an arrow function. + function parseExprSubscripts() { + const startTokenIndex = _base.state.tokens.length; + const wasArrow = parseExprAtom(); + if (wasArrow) { + return true; + } + parseSubscripts(startTokenIndex); + // If there was any optional chain operation, the start token would be marked + // as such, so also mark the end now. + if (_base.state.tokens.length > startTokenIndex && _base.state.tokens[startTokenIndex].isOptionalChainStart) { + _base.state.tokens[_base.state.tokens.length - 1].isOptionalChainEnd = true; + } + return false; +} exports.parseExprSubscripts = parseExprSubscripts; + +function parseSubscripts(startTokenIndex, noCalls = false) { + if (_base.isFlowEnabled) { + _flow.flowParseSubscripts.call(void 0, startTokenIndex, noCalls); + } else { + baseParseSubscripts(startTokenIndex, noCalls); + } +} + + function baseParseSubscripts(startTokenIndex, noCalls = false) { + const stopState = new StopState(false); + do { + parseSubscript(startTokenIndex, noCalls, stopState); + } while (!stopState.stop && !_base.state.error); +} exports.baseParseSubscripts = baseParseSubscripts; + +function parseSubscript(startTokenIndex, noCalls, stopState) { + if (_base.isTypeScriptEnabled) { + _typescript.tsParseSubscript.call(void 0, startTokenIndex, noCalls, stopState); + } else if (_base.isFlowEnabled) { + _flow.flowParseSubscript.call(void 0, startTokenIndex, noCalls, stopState); + } else { + baseParseSubscript(startTokenIndex, noCalls, stopState); + } +} + +/** Set 'state.stop = true' to indicate that we should stop parsing subscripts. */ + function baseParseSubscript( + startTokenIndex, + noCalls, + stopState, +) { + if (!noCalls && _index3.eat.call(void 0, _types3.TokenType.doubleColon)) { + parseNoCallExpr(); + stopState.stop = true; + // Propagate startTokenIndex so that `a::b?.()` will keep `a` as the first token. We may want + // to revisit this in the future when fully supporting bind syntax. + parseSubscripts(startTokenIndex, noCalls); + } else if (_index3.match.call(void 0, _types3.TokenType.questionDot)) { + _base.state.tokens[startTokenIndex].isOptionalChainStart = true; + if (noCalls && _index3.lookaheadType.call(void 0, ) === _types3.TokenType.parenL) { + stopState.stop = true; + return; + } + _index3.next.call(void 0, ); + _base.state.tokens[_base.state.tokens.length - 1].subscriptStartIndex = startTokenIndex; + + if (_index3.eat.call(void 0, _types3.TokenType.bracketL)) { + parseExpression(); + _util.expect.call(void 0, _types3.TokenType.bracketR); + } else if (_index3.eat.call(void 0, _types3.TokenType.parenL)) { + parseCallExpressionArguments(); + } else { + parseMaybePrivateName(); + } + } else if (_index3.eat.call(void 0, _types3.TokenType.dot)) { + _base.state.tokens[_base.state.tokens.length - 1].subscriptStartIndex = startTokenIndex; + parseMaybePrivateName(); + } else if (_index3.eat.call(void 0, _types3.TokenType.bracketL)) { + _base.state.tokens[_base.state.tokens.length - 1].subscriptStartIndex = startTokenIndex; + parseExpression(); + _util.expect.call(void 0, _types3.TokenType.bracketR); + } else if (!noCalls && _index3.match.call(void 0, _types3.TokenType.parenL)) { + if (atPossibleAsync()) { + // We see "async", but it's possible it's a usage of the name "async". Parse as if it's a + // function call, and if we see an arrow later, backtrack and re-parse as a parameter list. + const snapshot = _base.state.snapshot(); + const asyncStartTokenIndex = _base.state.tokens.length; + _index3.next.call(void 0, ); + _base.state.tokens[_base.state.tokens.length - 1].subscriptStartIndex = startTokenIndex; + + const callContextId = _base.getNextContextId.call(void 0, ); + + _base.state.tokens[_base.state.tokens.length - 1].contextId = callContextId; + parseCallExpressionArguments(); + _base.state.tokens[_base.state.tokens.length - 1].contextId = callContextId; + + if (shouldParseAsyncArrow()) { + // We hit an arrow, so backtrack and start again parsing function parameters. + _base.state.restoreFromSnapshot(snapshot); + stopState.stop = true; + _base.state.scopeDepth++; + + _statement.parseFunctionParams.call(void 0, ); + parseAsyncArrowFromCallExpression(asyncStartTokenIndex); + } + } else { + _index3.next.call(void 0, ); + _base.state.tokens[_base.state.tokens.length - 1].subscriptStartIndex = startTokenIndex; + const callContextId = _base.getNextContextId.call(void 0, ); + _base.state.tokens[_base.state.tokens.length - 1].contextId = callContextId; + parseCallExpressionArguments(); + _base.state.tokens[_base.state.tokens.length - 1].contextId = callContextId; + } + } else if (_index3.match.call(void 0, _types3.TokenType.backQuote)) { + // Tagged template expression. + parseTemplate(); + } else { + stopState.stop = true; + } +} exports.baseParseSubscript = baseParseSubscript; + + function atPossibleAsync() { + // This was made less strict than the original version to avoid passing around nodes, but it + // should be safe to have rare false positives here. + return ( + _base.state.tokens[_base.state.tokens.length - 1].contextualKeyword === _keywords.ContextualKeyword._async && + !_util.canInsertSemicolon.call(void 0, ) + ); +} exports.atPossibleAsync = atPossibleAsync; + + function parseCallExpressionArguments() { + let first = true; + while (!_index3.eat.call(void 0, _types3.TokenType.parenR) && !_base.state.error) { + if (first) { + first = false; + } else { + _util.expect.call(void 0, _types3.TokenType.comma); + if (_index3.eat.call(void 0, _types3.TokenType.parenR)) { + break; + } + } + + parseExprListItem(false); + } +} exports.parseCallExpressionArguments = parseCallExpressionArguments; + +function shouldParseAsyncArrow() { + return _index3.match.call(void 0, _types3.TokenType.colon) || _index3.match.call(void 0, _types3.TokenType.arrow); +} + +function parseAsyncArrowFromCallExpression(startTokenIndex) { + if (_base.isTypeScriptEnabled) { + _typescript.tsStartParseAsyncArrowFromCallExpression.call(void 0, ); + } else if (_base.isFlowEnabled) { + _flow.flowStartParseAsyncArrowFromCallExpression.call(void 0, ); + } + _util.expect.call(void 0, _types3.TokenType.arrow); + parseArrowExpression(startTokenIndex); +} + +// Parse a no-call expression (like argument of `new` or `::` operators). + +function parseNoCallExpr() { + const startTokenIndex = _base.state.tokens.length; + parseExprAtom(); + parseSubscripts(startTokenIndex, true); +} + +// Parse an atomic expression — either a single token that is an +// expression, an expression started by a keyword like `function` or +// `new`, or an expression wrapped in punctuation like `()`, `[]`, +// or `{}`. +// Returns true if the parsed expression was an arrow function. + function parseExprAtom() { + if (_index3.eat.call(void 0, _types3.TokenType.modulo)) { + // V8 intrinsic expression. Just parse the identifier, and the function invocation is parsed + // naturally. + parseIdentifier(); + return false; + } + + if (_index3.match.call(void 0, _types3.TokenType.jsxText) || _index3.match.call(void 0, _types3.TokenType.jsxEmptyText)) { + parseLiteral(); + return false; + } else if (_index3.match.call(void 0, _types3.TokenType.lessThan) && _base.isJSXEnabled) { + _base.state.type = _types3.TokenType.jsxTagStart; + _index.jsxParseElement.call(void 0, ); + _index3.next.call(void 0, ); + return false; + } + + const canBeArrow = _base.state.potentialArrowAt === _base.state.start; + switch (_base.state.type) { + case _types3.TokenType.slash: + case _types3.TokenType.assign: + _index3.retokenizeSlashAsRegex.call(void 0, ); + // Fall through. + + case _types3.TokenType._super: + case _types3.TokenType._this: + case _types3.TokenType.regexp: + case _types3.TokenType.num: + case _types3.TokenType.bigint: + case _types3.TokenType.decimal: + case _types3.TokenType.string: + case _types3.TokenType._null: + case _types3.TokenType._true: + case _types3.TokenType._false: + _index3.next.call(void 0, ); + return false; + + case _types3.TokenType._import: + _index3.next.call(void 0, ); + if (_index3.match.call(void 0, _types3.TokenType.dot)) { + // import.meta + _base.state.tokens[_base.state.tokens.length - 1].type = _types3.TokenType.name; + _index3.next.call(void 0, ); + parseIdentifier(); + } + return false; + + case _types3.TokenType.name: { + const startTokenIndex = _base.state.tokens.length; + const functionStart = _base.state.start; + const contextualKeyword = _base.state.contextualKeyword; + parseIdentifier(); + if (contextualKeyword === _keywords.ContextualKeyword._await) { + parseAwait(); + return false; + } else if ( + contextualKeyword === _keywords.ContextualKeyword._async && + _index3.match.call(void 0, _types3.TokenType._function) && + !_util.canInsertSemicolon.call(void 0, ) + ) { + _index3.next.call(void 0, ); + _statement.parseFunction.call(void 0, functionStart, false); + return false; + } else if ( + canBeArrow && + contextualKeyword === _keywords.ContextualKeyword._async && + !_util.canInsertSemicolon.call(void 0, ) && + _index3.match.call(void 0, _types3.TokenType.name) + ) { + _base.state.scopeDepth++; + _lval.parseBindingIdentifier.call(void 0, false); + _util.expect.call(void 0, _types3.TokenType.arrow); + // let foo = async bar => {}; + parseArrowExpression(startTokenIndex); + return true; + } else if (_index3.match.call(void 0, _types3.TokenType._do) && !_util.canInsertSemicolon.call(void 0, )) { + _index3.next.call(void 0, ); + _statement.parseBlock.call(void 0, ); + return false; + } + + if (canBeArrow && !_util.canInsertSemicolon.call(void 0, ) && _index3.match.call(void 0, _types3.TokenType.arrow)) { + _base.state.scopeDepth++; + _lval.markPriorBindingIdentifier.call(void 0, false); + _util.expect.call(void 0, _types3.TokenType.arrow); + parseArrowExpression(startTokenIndex); + return true; + } + + _base.state.tokens[_base.state.tokens.length - 1].identifierRole = _index3.IdentifierRole.Access; + return false; + } + + case _types3.TokenType._do: { + _index3.next.call(void 0, ); + _statement.parseBlock.call(void 0, ); + return false; + } + + case _types3.TokenType.parenL: { + const wasArrow = parseParenAndDistinguishExpression(canBeArrow); + return wasArrow; + } + + case _types3.TokenType.bracketL: + _index3.next.call(void 0, ); + parseExprList(_types3.TokenType.bracketR, true); + return false; + + case _types3.TokenType.braceL: + parseObj(false, false); + return false; + + case _types3.TokenType._function: + parseFunctionExpression(); + return false; + + case _types3.TokenType.at: + _statement.parseDecorators.call(void 0, ); + // Fall through. + + case _types3.TokenType._class: + _statement.parseClass.call(void 0, false); + return false; + + case _types3.TokenType._new: + parseNew(); + return false; + + case _types3.TokenType.backQuote: + parseTemplate(); + return false; + + case _types3.TokenType.doubleColon: { + _index3.next.call(void 0, ); + parseNoCallExpr(); + return false; + } + + case _types3.TokenType.hash: { + const code = _index3.lookaheadCharCode.call(void 0, ); + if (_identifier.IS_IDENTIFIER_START[code] || code === _charcodes.charCodes.backslash) { + parseMaybePrivateName(); + } else { + _index3.next.call(void 0, ); + } + // Smart pipeline topic reference. + return false; + } + + default: + _util.unexpected.call(void 0, ); + return false; + } +} exports.parseExprAtom = parseExprAtom; + +function parseMaybePrivateName() { + _index3.eat.call(void 0, _types3.TokenType.hash); + parseIdentifier(); +} + +function parseFunctionExpression() { + const functionStart = _base.state.start; + parseIdentifier(); + if (_index3.eat.call(void 0, _types3.TokenType.dot)) { + // function.sent + parseIdentifier(); + } + _statement.parseFunction.call(void 0, functionStart, false); +} + + function parseLiteral() { + _index3.next.call(void 0, ); +} exports.parseLiteral = parseLiteral; + + function parseParenExpression() { + _util.expect.call(void 0, _types3.TokenType.parenL); + parseExpression(); + _util.expect.call(void 0, _types3.TokenType.parenR); +} exports.parseParenExpression = parseParenExpression; + +// Returns true if this was an arrow expression. +function parseParenAndDistinguishExpression(canBeArrow) { + // Assume this is a normal parenthesized expression, but if we see an arrow, we'll bail and + // start over as a parameter list. + const snapshot = _base.state.snapshot(); + + const startTokenIndex = _base.state.tokens.length; + _util.expect.call(void 0, _types3.TokenType.parenL); + + let first = true; + + while (!_index3.match.call(void 0, _types3.TokenType.parenR) && !_base.state.error) { + if (first) { + first = false; + } else { + _util.expect.call(void 0, _types3.TokenType.comma); + if (_index3.match.call(void 0, _types3.TokenType.parenR)) { + break; + } + } + + if (_index3.match.call(void 0, _types3.TokenType.ellipsis)) { + _lval.parseRest.call(void 0, false /* isBlockScope */); + parseParenItem(); + break; + } else { + parseMaybeAssign(false, true); + } + } + + _util.expect.call(void 0, _types3.TokenType.parenR); + + if (canBeArrow && shouldParseArrow()) { + const wasArrow = parseArrow(); + if (wasArrow) { + // It was an arrow function this whole time, so start over and parse it as params so that we + // get proper token annotations. + _base.state.restoreFromSnapshot(snapshot); + _base.state.scopeDepth++; + // Don't specify a context ID because arrow functions don't need a context ID. + _statement.parseFunctionParams.call(void 0, ); + parseArrow(); + parseArrowExpression(startTokenIndex); + if (_base.state.error) { + // Nevermind! This must have been something that looks very much like an + // arrow function but where its "parameter list" isn't actually a valid + // parameter list. Force non-arrow parsing. + // See https://github.com/alangpierce/sucrase/issues/666 for an example. + _base.state.restoreFromSnapshot(snapshot); + parseParenAndDistinguishExpression(false); + return false; + } + return true; + } + } + + return false; +} + +function shouldParseArrow() { + return _index3.match.call(void 0, _types3.TokenType.colon) || !_util.canInsertSemicolon.call(void 0, ); +} + +// Returns whether there was an arrow token. + function parseArrow() { + if (_base.isTypeScriptEnabled) { + return _typescript.tsParseArrow.call(void 0, ); + } else if (_base.isFlowEnabled) { + return _flow.flowParseArrow.call(void 0, ); + } else { + return _index3.eat.call(void 0, _types3.TokenType.arrow); + } +} exports.parseArrow = parseArrow; + +function parseParenItem() { + if (_base.isTypeScriptEnabled || _base.isFlowEnabled) { + _types.typedParseParenItem.call(void 0, ); + } +} + +// New's precedence is slightly tricky. It must allow its argument to +// be a `[]` or dot subscript expression, but not a call — at least, +// not without wrapping it in parentheses. Thus, it uses the noCalls +// argument to parseSubscripts to prevent it from consuming the +// argument list. +function parseNew() { + _util.expect.call(void 0, _types3.TokenType._new); + if (_index3.eat.call(void 0, _types3.TokenType.dot)) { + // new.target + parseIdentifier(); + return; + } + parseNewCallee(); + if (_base.isFlowEnabled) { + _flow.flowStartParseNewArguments.call(void 0, ); + } + if (_index3.eat.call(void 0, _types3.TokenType.parenL)) { + parseExprList(_types3.TokenType.parenR); + } +} + +function parseNewCallee() { + parseNoCallExpr(); + _index3.eat.call(void 0, _types3.TokenType.questionDot); +} + + function parseTemplate() { + // Finish `, read quasi + _index3.nextTemplateToken.call(void 0, ); + // Finish quasi, read ${ + _index3.nextTemplateToken.call(void 0, ); + while (!_index3.match.call(void 0, _types3.TokenType.backQuote) && !_base.state.error) { + _util.expect.call(void 0, _types3.TokenType.dollarBraceL); + parseExpression(); + // Finish }, read quasi + _index3.nextTemplateToken.call(void 0, ); + // Finish quasi, read either ${ or ` + _index3.nextTemplateToken.call(void 0, ); + } + _index3.next.call(void 0, ); +} exports.parseTemplate = parseTemplate; + +// Parse an object literal or binding pattern. + function parseObj(isPattern, isBlockScope) { + // Attach a context ID to the object open and close brace and each object key. + const contextId = _base.getNextContextId.call(void 0, ); + let first = true; + + _index3.next.call(void 0, ); + _base.state.tokens[_base.state.tokens.length - 1].contextId = contextId; + + while (!_index3.eat.call(void 0, _types3.TokenType.braceR) && !_base.state.error) { + if (first) { + first = false; + } else { + _util.expect.call(void 0, _types3.TokenType.comma); + if (_index3.eat.call(void 0, _types3.TokenType.braceR)) { + break; + } + } + + let isGenerator = false; + if (_index3.match.call(void 0, _types3.TokenType.ellipsis)) { + const previousIndex = _base.state.tokens.length; + _lval.parseSpread.call(void 0, ); + if (isPattern) { + // Mark role when the only thing being spread over is an identifier. + if (_base.state.tokens.length === previousIndex + 2) { + _lval.markPriorBindingIdentifier.call(void 0, isBlockScope); + } + if (_index3.eat.call(void 0, _types3.TokenType.braceR)) { + break; + } + } + continue; + } + + if (!isPattern) { + isGenerator = _index3.eat.call(void 0, _types3.TokenType.star); + } + + if (!isPattern && _util.isContextual.call(void 0, _keywords.ContextualKeyword._async)) { + if (isGenerator) _util.unexpected.call(void 0, ); + + parseIdentifier(); + if ( + _index3.match.call(void 0, _types3.TokenType.colon) || + _index3.match.call(void 0, _types3.TokenType.parenL) || + _index3.match.call(void 0, _types3.TokenType.braceR) || + _index3.match.call(void 0, _types3.TokenType.eq) || + _index3.match.call(void 0, _types3.TokenType.comma) + ) { + // This is a key called "async" rather than an async function. + } else { + if (_index3.match.call(void 0, _types3.TokenType.star)) { + _index3.next.call(void 0, ); + isGenerator = true; + } + parsePropertyName(contextId); + } + } else { + parsePropertyName(contextId); + } + + parseObjPropValue(isPattern, isBlockScope, contextId); + } + + _base.state.tokens[_base.state.tokens.length - 1].contextId = contextId; +} exports.parseObj = parseObj; + +function isGetterOrSetterMethod(isPattern) { + // We go off of the next and don't bother checking if the node key is actually "get" or "set". + // This lets us avoid generating a node, and should only make the validation worse. + return ( + !isPattern && + (_index3.match.call(void 0, _types3.TokenType.string) || // get "string"() {} + _index3.match.call(void 0, _types3.TokenType.num) || // get 1() {} + _index3.match.call(void 0, _types3.TokenType.bracketL) || // get ["string"]() {} + _index3.match.call(void 0, _types3.TokenType.name) || // get foo() {} + !!(_base.state.type & _types3.TokenType.IS_KEYWORD)) // get debugger() {} + ); +} + +// Returns true if this was a method. +function parseObjectMethod(isPattern, objectContextId) { + // We don't need to worry about modifiers because object methods can't have optional bodies, so + // the start will never be used. + const functionStart = _base.state.start; + if (_index3.match.call(void 0, _types3.TokenType.parenL)) { + if (isPattern) _util.unexpected.call(void 0, ); + parseMethod(functionStart, /* isConstructor */ false); + return true; + } + + if (isGetterOrSetterMethod(isPattern)) { + parsePropertyName(objectContextId); + parseMethod(functionStart, /* isConstructor */ false); + return true; + } + return false; +} + +function parseObjectProperty(isPattern, isBlockScope) { + if (_index3.eat.call(void 0, _types3.TokenType.colon)) { + if (isPattern) { + _lval.parseMaybeDefault.call(void 0, isBlockScope); + } else { + parseMaybeAssign(false); + } + return; + } + + // Since there's no colon, we assume this is an object shorthand. + + // If we're in a destructuring, we've now discovered that the key was actually an assignee, so + // we need to tag it as a declaration with the appropriate scope. Otherwise, we might need to + // transform it on access, so mark it as a normal object shorthand. + let identifierRole; + if (isPattern) { + if (_base.state.scopeDepth === 0) { + identifierRole = _index3.IdentifierRole.ObjectShorthandTopLevelDeclaration; + } else if (isBlockScope) { + identifierRole = _index3.IdentifierRole.ObjectShorthandBlockScopedDeclaration; + } else { + identifierRole = _index3.IdentifierRole.ObjectShorthandFunctionScopedDeclaration; + } + } else { + identifierRole = _index3.IdentifierRole.ObjectShorthand; + } + _base.state.tokens[_base.state.tokens.length - 1].identifierRole = identifierRole; + + // Regardless of whether we know this to be a pattern or if we're in an ambiguous context, allow + // parsing as if there's a default value. + _lval.parseMaybeDefault.call(void 0, isBlockScope, true); +} + +function parseObjPropValue( + isPattern, + isBlockScope, + objectContextId, +) { + if (_base.isTypeScriptEnabled) { + _typescript.tsStartParseObjPropValue.call(void 0, ); + } else if (_base.isFlowEnabled) { + _flow.flowStartParseObjPropValue.call(void 0, ); + } + const wasMethod = parseObjectMethod(isPattern, objectContextId); + if (!wasMethod) { + parseObjectProperty(isPattern, isBlockScope); + } +} + + function parsePropertyName(objectContextId) { + if (_base.isFlowEnabled) { + _flow.flowParseVariance.call(void 0, ); + } + if (_index3.eat.call(void 0, _types3.TokenType.bracketL)) { + _base.state.tokens[_base.state.tokens.length - 1].contextId = objectContextId; + parseMaybeAssign(); + _util.expect.call(void 0, _types3.TokenType.bracketR); + _base.state.tokens[_base.state.tokens.length - 1].contextId = objectContextId; + } else { + if (_index3.match.call(void 0, _types3.TokenType.num) || _index3.match.call(void 0, _types3.TokenType.string) || _index3.match.call(void 0, _types3.TokenType.bigint) || _index3.match.call(void 0, _types3.TokenType.decimal)) { + parseExprAtom(); + } else { + parseMaybePrivateName(); + } + + _base.state.tokens[_base.state.tokens.length - 1].identifierRole = _index3.IdentifierRole.ObjectKey; + _base.state.tokens[_base.state.tokens.length - 1].contextId = objectContextId; + } +} exports.parsePropertyName = parsePropertyName; + +// Parse object or class method. + function parseMethod(functionStart, isConstructor) { + const funcContextId = _base.getNextContextId.call(void 0, ); + + _base.state.scopeDepth++; + const startTokenIndex = _base.state.tokens.length; + const allowModifiers = isConstructor; // For TypeScript parameter properties + _statement.parseFunctionParams.call(void 0, allowModifiers, funcContextId); + parseFunctionBodyAndFinish(functionStart, funcContextId); + const endTokenIndex = _base.state.tokens.length; + _base.state.scopes.push(new (0, _state.Scope)(startTokenIndex, endTokenIndex, true)); + _base.state.scopeDepth--; +} exports.parseMethod = parseMethod; + +// Parse arrow function expression. +// If the parameters are provided, they will be converted to an +// assignable list. + function parseArrowExpression(startTokenIndex) { + parseFunctionBody(true); + const endTokenIndex = _base.state.tokens.length; + _base.state.scopes.push(new (0, _state.Scope)(startTokenIndex, endTokenIndex, true)); + _base.state.scopeDepth--; +} exports.parseArrowExpression = parseArrowExpression; + + function parseFunctionBodyAndFinish(functionStart, funcContextId = 0) { + if (_base.isTypeScriptEnabled) { + _typescript.tsParseFunctionBodyAndFinish.call(void 0, functionStart, funcContextId); + } else if (_base.isFlowEnabled) { + _flow.flowParseFunctionBodyAndFinish.call(void 0, funcContextId); + } else { + parseFunctionBody(false, funcContextId); + } +} exports.parseFunctionBodyAndFinish = parseFunctionBodyAndFinish; + + function parseFunctionBody(allowExpression, funcContextId = 0) { + const isExpression = allowExpression && !_index3.match.call(void 0, _types3.TokenType.braceL); + + if (isExpression) { + parseMaybeAssign(); + } else { + _statement.parseBlock.call(void 0, true /* isFunctionScope */, funcContextId); + } +} exports.parseFunctionBody = parseFunctionBody; + +// Parses a comma-separated list of expressions, and returns them as +// an array. `close` is the token type that ends the list, and +// `allowEmpty` can be turned on to allow subsequent commas with +// nothing in between them to be parsed as `null` (which is needed +// for array literals). + +function parseExprList(close, allowEmpty = false) { + let first = true; + while (!_index3.eat.call(void 0, close) && !_base.state.error) { + if (first) { + first = false; + } else { + _util.expect.call(void 0, _types3.TokenType.comma); + if (_index3.eat.call(void 0, close)) break; + } + parseExprListItem(allowEmpty); + } +} + +function parseExprListItem(allowEmpty) { + if (allowEmpty && _index3.match.call(void 0, _types3.TokenType.comma)) { + // Empty item; nothing more to parse for this item. + } else if (_index3.match.call(void 0, _types3.TokenType.ellipsis)) { + _lval.parseSpread.call(void 0, ); + parseParenItem(); + } else if (_index3.match.call(void 0, _types3.TokenType.question)) { + // Partial function application proposal. + _index3.next.call(void 0, ); + } else { + parseMaybeAssign(false, true); + } +} + +// Parse the next token as an identifier. + function parseIdentifier() { + _index3.next.call(void 0, ); + _base.state.tokens[_base.state.tokens.length - 1].type = _types3.TokenType.name; +} exports.parseIdentifier = parseIdentifier; + +// Parses await expression inside async function. +function parseAwait() { + parseMaybeUnary(); +} + +// Parses yield expression inside generator. +function parseYield() { + _index3.next.call(void 0, ); + if (!_index3.match.call(void 0, _types3.TokenType.semi) && !_util.canInsertSemicolon.call(void 0, )) { + _index3.eat.call(void 0, _types3.TokenType.star); + parseMaybeAssign(); + } +} + +// https://github.com/tc39/proposal-js-module-blocks +function parseModuleExpression() { + _util.expectContextual.call(void 0, _keywords.ContextualKeyword._module); + _util.expect.call(void 0, _types3.TokenType.braceL); + // For now, just call parseBlockBody to parse the block. In the future when we + // implement full support, we'll want to emit scopes and possibly other + // information. + _statement.parseBlockBody.call(void 0, _types3.TokenType.braceR); +} Index: frontend/node_modules/sucrase/dist/parser/traverser/index.js =================================================================== --- frontend/node_modules/sucrase/dist/parser/traverser/index.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/parser/traverser/index.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,18 @@ +"use strict";Object.defineProperty(exports, "__esModule", {value: true}); +var _index = require('../tokenizer/index'); +var _charcodes = require('../util/charcodes'); +var _base = require('./base'); +var _statement = require('./statement'); + + function parseFile() { + // If enabled, skip leading hashbang line. + if ( + _base.state.pos === 0 && + _base.input.charCodeAt(0) === _charcodes.charCodes.numberSign && + _base.input.charCodeAt(1) === _charcodes.charCodes.exclamationMark + ) { + _index.skipLineComment.call(void 0, 2); + } + _index.nextToken.call(void 0, ); + return _statement.parseTopLevel.call(void 0, ); +} exports.parseFile = parseFile; Index: frontend/node_modules/sucrase/dist/parser/traverser/lval.js =================================================================== --- frontend/node_modules/sucrase/dist/parser/traverser/lval.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/parser/traverser/lval.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,159 @@ +"use strict";Object.defineProperty(exports, "__esModule", {value: true});var _flow = require('../plugins/flow'); +var _typescript = require('../plugins/typescript'); + + + + + + + +var _index = require('../tokenizer/index'); +var _keywords = require('../tokenizer/keywords'); +var _types = require('../tokenizer/types'); +var _base = require('./base'); +var _expression = require('./expression'); +var _util = require('./util'); + + function parseSpread() { + _index.next.call(void 0, ); + _expression.parseMaybeAssign.call(void 0, false); +} exports.parseSpread = parseSpread; + + function parseRest(isBlockScope) { + _index.next.call(void 0, ); + parseBindingAtom(isBlockScope); +} exports.parseRest = parseRest; + + function parseBindingIdentifier(isBlockScope) { + _expression.parseIdentifier.call(void 0, ); + markPriorBindingIdentifier(isBlockScope); +} exports.parseBindingIdentifier = parseBindingIdentifier; + + function parseImportedIdentifier() { + _expression.parseIdentifier.call(void 0, ); + _base.state.tokens[_base.state.tokens.length - 1].identifierRole = _index.IdentifierRole.ImportDeclaration; +} exports.parseImportedIdentifier = parseImportedIdentifier; + + function markPriorBindingIdentifier(isBlockScope) { + let identifierRole; + if (_base.state.scopeDepth === 0) { + identifierRole = _index.IdentifierRole.TopLevelDeclaration; + } else if (isBlockScope) { + identifierRole = _index.IdentifierRole.BlockScopedDeclaration; + } else { + identifierRole = _index.IdentifierRole.FunctionScopedDeclaration; + } + _base.state.tokens[_base.state.tokens.length - 1].identifierRole = identifierRole; +} exports.markPriorBindingIdentifier = markPriorBindingIdentifier; + +// Parses lvalue (assignable) atom. + function parseBindingAtom(isBlockScope) { + switch (_base.state.type) { + case _types.TokenType._this: { + // In TypeScript, "this" may be the name of a parameter, so allow it. + const oldIsType = _index.pushTypeContext.call(void 0, 0); + _index.next.call(void 0, ); + _index.popTypeContext.call(void 0, oldIsType); + return; + } + + case _types.TokenType._yield: + case _types.TokenType.name: { + _base.state.type = _types.TokenType.name; + parseBindingIdentifier(isBlockScope); + return; + } + + case _types.TokenType.bracketL: { + _index.next.call(void 0, ); + parseBindingList(_types.TokenType.bracketR, isBlockScope, true /* allowEmpty */); + return; + } + + case _types.TokenType.braceL: + _expression.parseObj.call(void 0, true, isBlockScope); + return; + + default: + _util.unexpected.call(void 0, ); + } +} exports.parseBindingAtom = parseBindingAtom; + + function parseBindingList( + close, + isBlockScope, + allowEmpty = false, + allowModifiers = false, + contextId = 0, +) { + let first = true; + + let hasRemovedComma = false; + const firstItemTokenIndex = _base.state.tokens.length; + + while (!_index.eat.call(void 0, close) && !_base.state.error) { + if (first) { + first = false; + } else { + _util.expect.call(void 0, _types.TokenType.comma); + _base.state.tokens[_base.state.tokens.length - 1].contextId = contextId; + // After a "this" type in TypeScript, we need to set the following comma (if any) to also be + // a type token so that it will be removed. + if (!hasRemovedComma && _base.state.tokens[firstItemTokenIndex].isType) { + _base.state.tokens[_base.state.tokens.length - 1].isType = true; + hasRemovedComma = true; + } + } + if (allowEmpty && _index.match.call(void 0, _types.TokenType.comma)) { + // Empty item; nothing further to parse for this item. + } else if (_index.eat.call(void 0, close)) { + break; + } else if (_index.match.call(void 0, _types.TokenType.ellipsis)) { + parseRest(isBlockScope); + parseAssignableListItemTypes(); + // Support rest element trailing commas allowed by TypeScript <2.9. + _index.eat.call(void 0, _types.TokenType.comma); + _util.expect.call(void 0, close); + break; + } else { + parseAssignableListItem(allowModifiers, isBlockScope); + } + } +} exports.parseBindingList = parseBindingList; + +function parseAssignableListItem(allowModifiers, isBlockScope) { + if (allowModifiers) { + _typescript.tsParseModifiers.call(void 0, [ + _keywords.ContextualKeyword._public, + _keywords.ContextualKeyword._protected, + _keywords.ContextualKeyword._private, + _keywords.ContextualKeyword._readonly, + _keywords.ContextualKeyword._override, + ]); + } + + parseMaybeDefault(isBlockScope); + parseAssignableListItemTypes(); + parseMaybeDefault(isBlockScope, true /* leftAlreadyParsed */); +} + +function parseAssignableListItemTypes() { + if (_base.isFlowEnabled) { + _flow.flowParseAssignableListItemTypes.call(void 0, ); + } else if (_base.isTypeScriptEnabled) { + _typescript.tsParseAssignableListItemTypes.call(void 0, ); + } +} + +// Parses assignment pattern around given atom if possible. + function parseMaybeDefault(isBlockScope, leftAlreadyParsed = false) { + if (!leftAlreadyParsed) { + parseBindingAtom(isBlockScope); + } + if (!_index.eat.call(void 0, _types.TokenType.eq)) { + return; + } + const eqIndex = _base.state.tokens.length - 1; + _expression.parseMaybeAssign.call(void 0, ); + _base.state.tokens[eqIndex].rhsEndIndex = _base.state.tokens.length; +} exports.parseMaybeDefault = parseMaybeDefault; Index: frontend/node_modules/sucrase/dist/parser/traverser/statement.js =================================================================== --- frontend/node_modules/sucrase/dist/parser/traverser/statement.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/parser/traverser/statement.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,1332 @@ +"use strict";Object.defineProperty(exports, "__esModule", {value: true});/* eslint max-len: 0 */ + +var _index = require('../index'); + + + + + + + + + + + + + + + + +var _flow = require('../plugins/flow'); + + + + + + + + + + + + + + + + + + +var _typescript = require('../plugins/typescript'); + + + + + + + + + + + + +var _tokenizer = require('../tokenizer'); +var _keywords = require('../tokenizer/keywords'); +var _state = require('../tokenizer/state'); +var _types = require('../tokenizer/types'); +var _charcodes = require('../util/charcodes'); +var _base = require('./base'); + + + + + + + + + + + + +var _expression = require('./expression'); + + + + + +var _lval = require('./lval'); + + + + + + + + + + + + +var _util = require('./util'); + + function parseTopLevel() { + parseBlockBody(_types.TokenType.eof); + _base.state.scopes.push(new (0, _state.Scope)(0, _base.state.tokens.length, true)); + if (_base.state.scopeDepth !== 0) { + throw new Error(`Invalid scope depth at end of file: ${_base.state.scopeDepth}`); + } + return new (0, _index.File)(_base.state.tokens, _base.state.scopes); +} exports.parseTopLevel = parseTopLevel; + +// Parse a single statement. +// +// If expecting a statement and finding a slash operator, parse a +// regular expression literal. This is to handle cases like +// `if (foo) /blah/.exec(foo)`, where looking at the previous token +// does not help. + + function parseStatement(declaration) { + if (_base.isFlowEnabled) { + if (_flow.flowTryParseStatement.call(void 0, )) { + return; + } + } + if (_tokenizer.match.call(void 0, _types.TokenType.at)) { + parseDecorators(); + } + parseStatementContent(declaration); +} exports.parseStatement = parseStatement; + +function parseStatementContent(declaration) { + if (_base.isTypeScriptEnabled) { + if (_typescript.tsTryParseStatementContent.call(void 0, )) { + return; + } + } + + const starttype = _base.state.type; + + // Most types of statements are recognized by the keyword they + // start with. Many are trivial to parse, some require a bit of + // complexity. + + switch (starttype) { + case _types.TokenType._break: + case _types.TokenType._continue: + parseBreakContinueStatement(); + return; + case _types.TokenType._debugger: + parseDebuggerStatement(); + return; + case _types.TokenType._do: + parseDoStatement(); + return; + case _types.TokenType._for: + parseForStatement(); + return; + case _types.TokenType._function: + if (_tokenizer.lookaheadType.call(void 0, ) === _types.TokenType.dot) break; + if (!declaration) _util.unexpected.call(void 0, ); + parseFunctionStatement(); + return; + + case _types.TokenType._class: + if (!declaration) _util.unexpected.call(void 0, ); + parseClass(true); + return; + + case _types.TokenType._if: + parseIfStatement(); + return; + case _types.TokenType._return: + parseReturnStatement(); + return; + case _types.TokenType._switch: + parseSwitchStatement(); + return; + case _types.TokenType._throw: + parseThrowStatement(); + return; + case _types.TokenType._try: + parseTryStatement(); + return; + + case _types.TokenType._let: + case _types.TokenType._const: + if (!declaration) _util.unexpected.call(void 0, ); // NOTE: falls through to _var + + case _types.TokenType._var: + parseVarStatement(starttype !== _types.TokenType._var); + return; + + case _types.TokenType._while: + parseWhileStatement(); + return; + case _types.TokenType.braceL: + parseBlock(); + return; + case _types.TokenType.semi: + parseEmptyStatement(); + return; + case _types.TokenType._export: + case _types.TokenType._import: { + const nextType = _tokenizer.lookaheadType.call(void 0, ); + if (nextType === _types.TokenType.parenL || nextType === _types.TokenType.dot) { + break; + } + _tokenizer.next.call(void 0, ); + if (starttype === _types.TokenType._import) { + parseImport(); + } else { + parseExport(); + } + return; + } + case _types.TokenType.name: + if (_base.state.contextualKeyword === _keywords.ContextualKeyword._async) { + const functionStart = _base.state.start; + // peek ahead and see if next token is a function + const snapshot = _base.state.snapshot(); + _tokenizer.next.call(void 0, ); + if (_tokenizer.match.call(void 0, _types.TokenType._function) && !_util.canInsertSemicolon.call(void 0, )) { + _util.expect.call(void 0, _types.TokenType._function); + parseFunction(functionStart, true); + return; + } else { + _base.state.restoreFromSnapshot(snapshot); + } + } else if ( + _base.state.contextualKeyword === _keywords.ContextualKeyword._using && + !_util.hasFollowingLineBreak.call(void 0, ) && + // Statements like `using[0]` and `using in foo` aren't actual using + // declarations. + _tokenizer.lookaheadType.call(void 0, ) === _types.TokenType.name + ) { + parseVarStatement(true); + return; + } else if (startsAwaitUsing()) { + _util.expectContextual.call(void 0, _keywords.ContextualKeyword._await); + parseVarStatement(true); + return; + } + default: + // Do nothing. + break; + } + + // If the statement does not start with a statement keyword or a + // brace, it's an ExpressionStatement or LabeledStatement. We + // simply start parsing an expression, and afterwards, if the + // next token is a colon and the expression was a simple + // Identifier node, we switch to interpreting it as a label. + const initialTokensLength = _base.state.tokens.length; + _expression.parseExpression.call(void 0, ); + let simpleName = null; + if (_base.state.tokens.length === initialTokensLength + 1) { + const token = _base.state.tokens[_base.state.tokens.length - 1]; + if (token.type === _types.TokenType.name) { + simpleName = token.contextualKeyword; + } + } + if (simpleName == null) { + _util.semicolon.call(void 0, ); + return; + } + if (_tokenizer.eat.call(void 0, _types.TokenType.colon)) { + parseLabeledStatement(); + } else { + // This was an identifier, so we might want to handle flow/typescript-specific cases. + parseIdentifierStatement(simpleName); + } +} + +/** + * Determine if we're positioned at an `await using` declaration. + * + * Note that this can happen either in place of a regular variable declaration + * or in a loop body, and in both places, there are similar-looking cases where + * we need to return false. + * + * Examples returning true: + * await using foo = bar(); + * for (await using a of b) {} + * + * Examples returning false: + * await using + * await using + 1 + * await using instanceof T + * for (await using;;) {} + * + * For now, we early return if we don't see `await`, then do a simple + * backtracking-based lookahead for the `using` and identifier tokens. In the + * future, this could be optimized with a character-based approach. + */ +function startsAwaitUsing() { + if (!_util.isContextual.call(void 0, _keywords.ContextualKeyword._await)) { + return false; + } + const snapshot = _base.state.snapshot(); + // await + _tokenizer.next.call(void 0, ); + if (!_util.isContextual.call(void 0, _keywords.ContextualKeyword._using) || _util.hasPrecedingLineBreak.call(void 0, )) { + _base.state.restoreFromSnapshot(snapshot); + return false; + } + // using + _tokenizer.next.call(void 0, ); + if (!_tokenizer.match.call(void 0, _types.TokenType.name) || _util.hasPrecedingLineBreak.call(void 0, )) { + _base.state.restoreFromSnapshot(snapshot); + return false; + } + _base.state.restoreFromSnapshot(snapshot); + return true; +} + + function parseDecorators() { + while (_tokenizer.match.call(void 0, _types.TokenType.at)) { + parseDecorator(); + } +} exports.parseDecorators = parseDecorators; + +function parseDecorator() { + _tokenizer.next.call(void 0, ); + if (_tokenizer.eat.call(void 0, _types.TokenType.parenL)) { + _expression.parseExpression.call(void 0, ); + _util.expect.call(void 0, _types.TokenType.parenR); + } else { + _expression.parseIdentifier.call(void 0, ); + while (_tokenizer.eat.call(void 0, _types.TokenType.dot)) { + _expression.parseIdentifier.call(void 0, ); + } + parseMaybeDecoratorArguments(); + } +} + +function parseMaybeDecoratorArguments() { + if (_base.isTypeScriptEnabled) { + _typescript.tsParseMaybeDecoratorArguments.call(void 0, ); + } else { + baseParseMaybeDecoratorArguments(); + } +} + + function baseParseMaybeDecoratorArguments() { + if (_tokenizer.eat.call(void 0, _types.TokenType.parenL)) { + _expression.parseCallExpressionArguments.call(void 0, ); + } +} exports.baseParseMaybeDecoratorArguments = baseParseMaybeDecoratorArguments; + +function parseBreakContinueStatement() { + _tokenizer.next.call(void 0, ); + if (!_util.isLineTerminator.call(void 0, )) { + _expression.parseIdentifier.call(void 0, ); + _util.semicolon.call(void 0, ); + } +} + +function parseDebuggerStatement() { + _tokenizer.next.call(void 0, ); + _util.semicolon.call(void 0, ); +} + +function parseDoStatement() { + _tokenizer.next.call(void 0, ); + parseStatement(false); + _util.expect.call(void 0, _types.TokenType._while); + _expression.parseParenExpression.call(void 0, ); + _tokenizer.eat.call(void 0, _types.TokenType.semi); +} + +function parseForStatement() { + _base.state.scopeDepth++; + const startTokenIndex = _base.state.tokens.length; + parseAmbiguousForStatement(); + const endTokenIndex = _base.state.tokens.length; + _base.state.scopes.push(new (0, _state.Scope)(startTokenIndex, endTokenIndex, false)); + _base.state.scopeDepth--; +} + +/** + * Determine if this token is a `using` declaration (explicit resource + * management) as part of a loop. + * https://github.com/tc39/proposal-explicit-resource-management + */ +function isUsingInLoop() { + if (!_util.isContextual.call(void 0, _keywords.ContextualKeyword._using)) { + return false; + } + // This must be `for (using of`, where `using` is the name of the loop + // variable. + if (_util.isLookaheadContextual.call(void 0, _keywords.ContextualKeyword._of)) { + return false; + } + return true; +} + +// Disambiguating between a `for` and a `for`/`in` or `for`/`of` +// loop is non-trivial. Basically, we have to parse the init `var` +// statement or expression, disallowing the `in` operator (see +// the second parameter to `parseExpression`), and then check +// whether the next token is `in` or `of`. When there is no init +// part (semicolon immediately after the opening parenthesis), it +// is a regular `for` loop. +function parseAmbiguousForStatement() { + _tokenizer.next.call(void 0, ); + + let forAwait = false; + if (_util.isContextual.call(void 0, _keywords.ContextualKeyword._await)) { + forAwait = true; + _tokenizer.next.call(void 0, ); + } + _util.expect.call(void 0, _types.TokenType.parenL); + + if (_tokenizer.match.call(void 0, _types.TokenType.semi)) { + if (forAwait) { + _util.unexpected.call(void 0, ); + } + parseFor(); + return; + } + + const isAwaitUsing = startsAwaitUsing(); + if (isAwaitUsing || _tokenizer.match.call(void 0, _types.TokenType._var) || _tokenizer.match.call(void 0, _types.TokenType._let) || _tokenizer.match.call(void 0, _types.TokenType._const) || isUsingInLoop()) { + if (isAwaitUsing) { + _util.expectContextual.call(void 0, _keywords.ContextualKeyword._await); + } + _tokenizer.next.call(void 0, ); + parseVar(true, _base.state.type !== _types.TokenType._var); + if (_tokenizer.match.call(void 0, _types.TokenType._in) || _util.isContextual.call(void 0, _keywords.ContextualKeyword._of)) { + parseForIn(forAwait); + return; + } + parseFor(); + return; + } + + _expression.parseExpression.call(void 0, true); + if (_tokenizer.match.call(void 0, _types.TokenType._in) || _util.isContextual.call(void 0, _keywords.ContextualKeyword._of)) { + parseForIn(forAwait); + return; + } + if (forAwait) { + _util.unexpected.call(void 0, ); + } + parseFor(); +} + +function parseFunctionStatement() { + const functionStart = _base.state.start; + _tokenizer.next.call(void 0, ); + parseFunction(functionStart, true); +} + +function parseIfStatement() { + _tokenizer.next.call(void 0, ); + _expression.parseParenExpression.call(void 0, ); + parseStatement(false); + if (_tokenizer.eat.call(void 0, _types.TokenType._else)) { + parseStatement(false); + } +} + +function parseReturnStatement() { + _tokenizer.next.call(void 0, ); + + // In `return` (and `break`/`continue`), the keywords with + // optional arguments, we eagerly look for a semicolon or the + // possibility to insert one. + + if (!_util.isLineTerminator.call(void 0, )) { + _expression.parseExpression.call(void 0, ); + _util.semicolon.call(void 0, ); + } +} + +function parseSwitchStatement() { + _tokenizer.next.call(void 0, ); + _expression.parseParenExpression.call(void 0, ); + _base.state.scopeDepth++; + const startTokenIndex = _base.state.tokens.length; + _util.expect.call(void 0, _types.TokenType.braceL); + + // Don't bother validation; just go through any sequence of cases, defaults, and statements. + while (!_tokenizer.match.call(void 0, _types.TokenType.braceR) && !_base.state.error) { + if (_tokenizer.match.call(void 0, _types.TokenType._case) || _tokenizer.match.call(void 0, _types.TokenType._default)) { + const isCase = _tokenizer.match.call(void 0, _types.TokenType._case); + _tokenizer.next.call(void 0, ); + if (isCase) { + _expression.parseExpression.call(void 0, ); + } + _util.expect.call(void 0, _types.TokenType.colon); + } else { + parseStatement(true); + } + } + _tokenizer.next.call(void 0, ); // Closing brace + const endTokenIndex = _base.state.tokens.length; + _base.state.scopes.push(new (0, _state.Scope)(startTokenIndex, endTokenIndex, false)); + _base.state.scopeDepth--; +} + +function parseThrowStatement() { + _tokenizer.next.call(void 0, ); + _expression.parseExpression.call(void 0, ); + _util.semicolon.call(void 0, ); +} + +function parseCatchClauseParam() { + _lval.parseBindingAtom.call(void 0, true /* isBlockScope */); + + if (_base.isTypeScriptEnabled) { + _typescript.tsTryParseTypeAnnotation.call(void 0, ); + } +} + +function parseTryStatement() { + _tokenizer.next.call(void 0, ); + + parseBlock(); + + if (_tokenizer.match.call(void 0, _types.TokenType._catch)) { + _tokenizer.next.call(void 0, ); + let catchBindingStartTokenIndex = null; + if (_tokenizer.match.call(void 0, _types.TokenType.parenL)) { + _base.state.scopeDepth++; + catchBindingStartTokenIndex = _base.state.tokens.length; + _util.expect.call(void 0, _types.TokenType.parenL); + parseCatchClauseParam(); + _util.expect.call(void 0, _types.TokenType.parenR); + } + parseBlock(); + if (catchBindingStartTokenIndex != null) { + // We need a special scope for the catch binding which includes the binding itself and the + // catch block. + const endTokenIndex = _base.state.tokens.length; + _base.state.scopes.push(new (0, _state.Scope)(catchBindingStartTokenIndex, endTokenIndex, false)); + _base.state.scopeDepth--; + } + } + if (_tokenizer.eat.call(void 0, _types.TokenType._finally)) { + parseBlock(); + } +} + + function parseVarStatement(isBlockScope) { + _tokenizer.next.call(void 0, ); + parseVar(false, isBlockScope); + _util.semicolon.call(void 0, ); +} exports.parseVarStatement = parseVarStatement; + +function parseWhileStatement() { + _tokenizer.next.call(void 0, ); + _expression.parseParenExpression.call(void 0, ); + parseStatement(false); +} + +function parseEmptyStatement() { + _tokenizer.next.call(void 0, ); +} + +function parseLabeledStatement() { + parseStatement(true); +} + +/** + * Parse a statement starting with an identifier of the given name. Subclasses match on the name + * to handle statements like "declare". + */ +function parseIdentifierStatement(contextualKeyword) { + if (_base.isTypeScriptEnabled) { + _typescript.tsParseIdentifierStatement.call(void 0, contextualKeyword); + } else if (_base.isFlowEnabled) { + _flow.flowParseIdentifierStatement.call(void 0, contextualKeyword); + } else { + _util.semicolon.call(void 0, ); + } +} + +// Parse a semicolon-enclosed block of statements. + function parseBlock(isFunctionScope = false, contextId = 0) { + const startTokenIndex = _base.state.tokens.length; + _base.state.scopeDepth++; + _util.expect.call(void 0, _types.TokenType.braceL); + if (contextId) { + _base.state.tokens[_base.state.tokens.length - 1].contextId = contextId; + } + parseBlockBody(_types.TokenType.braceR); + if (contextId) { + _base.state.tokens[_base.state.tokens.length - 1].contextId = contextId; + } + const endTokenIndex = _base.state.tokens.length; + _base.state.scopes.push(new (0, _state.Scope)(startTokenIndex, endTokenIndex, isFunctionScope)); + _base.state.scopeDepth--; +} exports.parseBlock = parseBlock; + + function parseBlockBody(end) { + while (!_tokenizer.eat.call(void 0, end) && !_base.state.error) { + parseStatement(true); + } +} exports.parseBlockBody = parseBlockBody; + +// Parse a regular `for` loop. The disambiguation code in +// `parseStatement` will already have parsed the init statement or +// expression. + +function parseFor() { + _util.expect.call(void 0, _types.TokenType.semi); + if (!_tokenizer.match.call(void 0, _types.TokenType.semi)) { + _expression.parseExpression.call(void 0, ); + } + _util.expect.call(void 0, _types.TokenType.semi); + if (!_tokenizer.match.call(void 0, _types.TokenType.parenR)) { + _expression.parseExpression.call(void 0, ); + } + _util.expect.call(void 0, _types.TokenType.parenR); + parseStatement(false); +} + +// Parse a `for`/`in` and `for`/`of` loop, which are almost +// same from parser's perspective. + +function parseForIn(forAwait) { + if (forAwait) { + _util.eatContextual.call(void 0, _keywords.ContextualKeyword._of); + } else { + _tokenizer.next.call(void 0, ); + } + _expression.parseExpression.call(void 0, ); + _util.expect.call(void 0, _types.TokenType.parenR); + parseStatement(false); +} + +// Parse a list of variable declarations. + +function parseVar(isFor, isBlockScope) { + while (true) { + parseVarHead(isBlockScope); + if (_tokenizer.eat.call(void 0, _types.TokenType.eq)) { + const eqIndex = _base.state.tokens.length - 1; + _expression.parseMaybeAssign.call(void 0, isFor); + _base.state.tokens[eqIndex].rhsEndIndex = _base.state.tokens.length; + } + if (!_tokenizer.eat.call(void 0, _types.TokenType.comma)) { + break; + } + } +} + +function parseVarHead(isBlockScope) { + _lval.parseBindingAtom.call(void 0, isBlockScope); + if (_base.isTypeScriptEnabled) { + _typescript.tsAfterParseVarHead.call(void 0, ); + } else if (_base.isFlowEnabled) { + _flow.flowAfterParseVarHead.call(void 0, ); + } +} + +// Parse a function declaration or literal (depending on the +// `isStatement` parameter). + + function parseFunction( + functionStart, + isStatement, + optionalId = false, +) { + if (_tokenizer.match.call(void 0, _types.TokenType.star)) { + _tokenizer.next.call(void 0, ); + } + + if (isStatement && !optionalId && !_tokenizer.match.call(void 0, _types.TokenType.name) && !_tokenizer.match.call(void 0, _types.TokenType._yield)) { + _util.unexpected.call(void 0, ); + } + + let nameScopeStartTokenIndex = null; + + if (_tokenizer.match.call(void 0, _types.TokenType.name)) { + // Expression-style functions should limit their name's scope to the function body, so we make + // a new function scope to enforce that. + if (!isStatement) { + nameScopeStartTokenIndex = _base.state.tokens.length; + _base.state.scopeDepth++; + } + _lval.parseBindingIdentifier.call(void 0, false); + } + + const startTokenIndex = _base.state.tokens.length; + _base.state.scopeDepth++; + parseFunctionParams(); + _expression.parseFunctionBodyAndFinish.call(void 0, functionStart); + const endTokenIndex = _base.state.tokens.length; + // In addition to the block scope of the function body, we need a separate function-style scope + // that includes the params. + _base.state.scopes.push(new (0, _state.Scope)(startTokenIndex, endTokenIndex, true)); + _base.state.scopeDepth--; + if (nameScopeStartTokenIndex !== null) { + _base.state.scopes.push(new (0, _state.Scope)(nameScopeStartTokenIndex, endTokenIndex, true)); + _base.state.scopeDepth--; + } +} exports.parseFunction = parseFunction; + + function parseFunctionParams( + allowModifiers = false, + funcContextId = 0, +) { + if (_base.isTypeScriptEnabled) { + _typescript.tsStartParseFunctionParams.call(void 0, ); + } else if (_base.isFlowEnabled) { + _flow.flowStartParseFunctionParams.call(void 0, ); + } + + _util.expect.call(void 0, _types.TokenType.parenL); + if (funcContextId) { + _base.state.tokens[_base.state.tokens.length - 1].contextId = funcContextId; + } + _lval.parseBindingList.call(void 0, + _types.TokenType.parenR, + false /* isBlockScope */, + false /* allowEmpty */, + allowModifiers, + funcContextId, + ); + if (funcContextId) { + _base.state.tokens[_base.state.tokens.length - 1].contextId = funcContextId; + } +} exports.parseFunctionParams = parseFunctionParams; + +// Parse a class declaration or literal (depending on the +// `isStatement` parameter). + + function parseClass(isStatement, optionalId = false) { + // Put a context ID on the class keyword, the open-brace, and the close-brace, so that later + // code can easily navigate to meaningful points on the class. + const contextId = _base.getNextContextId.call(void 0, ); + + _tokenizer.next.call(void 0, ); + _base.state.tokens[_base.state.tokens.length - 1].contextId = contextId; + _base.state.tokens[_base.state.tokens.length - 1].isExpression = !isStatement; + // Like with functions, we declare a special "name scope" from the start of the name to the end + // of the class, but only with expression-style classes, to represent the fact that the name is + // available to the body of the class but not an outer declaration. + let nameScopeStartTokenIndex = null; + if (!isStatement) { + nameScopeStartTokenIndex = _base.state.tokens.length; + _base.state.scopeDepth++; + } + parseClassId(isStatement, optionalId); + parseClassSuper(); + const openBraceIndex = _base.state.tokens.length; + parseClassBody(contextId); + if (_base.state.error) { + return; + } + _base.state.tokens[openBraceIndex].contextId = contextId; + _base.state.tokens[_base.state.tokens.length - 1].contextId = contextId; + if (nameScopeStartTokenIndex !== null) { + const endTokenIndex = _base.state.tokens.length; + _base.state.scopes.push(new (0, _state.Scope)(nameScopeStartTokenIndex, endTokenIndex, false)); + _base.state.scopeDepth--; + } +} exports.parseClass = parseClass; + +function isClassProperty() { + return _tokenizer.match.call(void 0, _types.TokenType.eq) || _tokenizer.match.call(void 0, _types.TokenType.semi) || _tokenizer.match.call(void 0, _types.TokenType.braceR) || _tokenizer.match.call(void 0, _types.TokenType.bang) || _tokenizer.match.call(void 0, _types.TokenType.colon); +} + +function isClassMethod() { + return _tokenizer.match.call(void 0, _types.TokenType.parenL) || _tokenizer.match.call(void 0, _types.TokenType.lessThan); +} + +function parseClassBody(classContextId) { + _util.expect.call(void 0, _types.TokenType.braceL); + + while (!_tokenizer.eat.call(void 0, _types.TokenType.braceR) && !_base.state.error) { + if (_tokenizer.eat.call(void 0, _types.TokenType.semi)) { + continue; + } + + if (_tokenizer.match.call(void 0, _types.TokenType.at)) { + parseDecorator(); + continue; + } + const memberStart = _base.state.start; + parseClassMember(memberStart, classContextId); + } +} + +function parseClassMember(memberStart, classContextId) { + if (_base.isTypeScriptEnabled) { + _typescript.tsParseModifiers.call(void 0, [ + _keywords.ContextualKeyword._declare, + _keywords.ContextualKeyword._public, + _keywords.ContextualKeyword._protected, + _keywords.ContextualKeyword._private, + _keywords.ContextualKeyword._override, + ]); + } + let isStatic = false; + if (_tokenizer.match.call(void 0, _types.TokenType.name) && _base.state.contextualKeyword === _keywords.ContextualKeyword._static) { + _expression.parseIdentifier.call(void 0, ); // eats 'static' + if (isClassMethod()) { + parseClassMethod(memberStart, /* isConstructor */ false); + return; + } else if (isClassProperty()) { + parseClassProperty(); + return; + } + // otherwise something static + _base.state.tokens[_base.state.tokens.length - 1].type = _types.TokenType._static; + isStatic = true; + + if (_tokenizer.match.call(void 0, _types.TokenType.braceL)) { + // This is a static block. Mark the word "static" with the class context ID for class element + // detection and parse as a regular block. + _base.state.tokens[_base.state.tokens.length - 1].contextId = classContextId; + parseBlock(); + return; + } + } + + parseClassMemberWithIsStatic(memberStart, isStatic, classContextId); +} + +function parseClassMemberWithIsStatic( + memberStart, + isStatic, + classContextId, +) { + if (_base.isTypeScriptEnabled) { + if (_typescript.tsTryParseClassMemberWithIsStatic.call(void 0, isStatic)) { + return; + } + } + if (_tokenizer.eat.call(void 0, _types.TokenType.star)) { + // a generator + parseClassPropertyName(classContextId); + parseClassMethod(memberStart, /* isConstructor */ false); + return; + } + + // Get the identifier name so we can tell if it's actually a keyword like "async", "get", or + // "set". + parseClassPropertyName(classContextId); + let isConstructor = false; + const token = _base.state.tokens[_base.state.tokens.length - 1]; + // We allow "constructor" as either an identifier or a string. + if (token.contextualKeyword === _keywords.ContextualKeyword._constructor) { + isConstructor = true; + } + parsePostMemberNameModifiers(); + + if (isClassMethod()) { + parseClassMethod(memberStart, isConstructor); + } else if (isClassProperty()) { + parseClassProperty(); + } else if (token.contextualKeyword === _keywords.ContextualKeyword._async && !_util.isLineTerminator.call(void 0, )) { + _base.state.tokens[_base.state.tokens.length - 1].type = _types.TokenType._async; + // an async method + const isGenerator = _tokenizer.match.call(void 0, _types.TokenType.star); + if (isGenerator) { + _tokenizer.next.call(void 0, ); + } + + // The so-called parsed name would have been "async": get the real name. + parseClassPropertyName(classContextId); + parsePostMemberNameModifiers(); + parseClassMethod(memberStart, false /* isConstructor */); + } else if ( + (token.contextualKeyword === _keywords.ContextualKeyword._get || + token.contextualKeyword === _keywords.ContextualKeyword._set) && + !(_util.isLineTerminator.call(void 0, ) && _tokenizer.match.call(void 0, _types.TokenType.star)) + ) { + if (token.contextualKeyword === _keywords.ContextualKeyword._get) { + _base.state.tokens[_base.state.tokens.length - 1].type = _types.TokenType._get; + } else { + _base.state.tokens[_base.state.tokens.length - 1].type = _types.TokenType._set; + } + // `get\n*` is an uninitialized property named 'get' followed by a generator. + // a getter or setter + // The so-called parsed name would have been "get/set": get the real name. + parseClassPropertyName(classContextId); + parseClassMethod(memberStart, /* isConstructor */ false); + } else if (token.contextualKeyword === _keywords.ContextualKeyword._accessor && !_util.isLineTerminator.call(void 0, )) { + parseClassPropertyName(classContextId); + parseClassProperty(); + } else if (_util.isLineTerminator.call(void 0, )) { + // an uninitialized class property (due to ASI, since we don't otherwise recognize the next token) + parseClassProperty(); + } else { + _util.unexpected.call(void 0, ); + } +} + +function parseClassMethod(functionStart, isConstructor) { + if (_base.isTypeScriptEnabled) { + _typescript.tsTryParseTypeParameters.call(void 0, ); + } else if (_base.isFlowEnabled) { + if (_tokenizer.match.call(void 0, _types.TokenType.lessThan)) { + _flow.flowParseTypeParameterDeclaration.call(void 0, ); + } + } + _expression.parseMethod.call(void 0, functionStart, isConstructor); +} + +// Return the name of the class property, if it is a simple identifier. + function parseClassPropertyName(classContextId) { + _expression.parsePropertyName.call(void 0, classContextId); +} exports.parseClassPropertyName = parseClassPropertyName; + + function parsePostMemberNameModifiers() { + if (_base.isTypeScriptEnabled) { + const oldIsType = _tokenizer.pushTypeContext.call(void 0, 0); + _tokenizer.eat.call(void 0, _types.TokenType.question); + _tokenizer.popTypeContext.call(void 0, oldIsType); + } +} exports.parsePostMemberNameModifiers = parsePostMemberNameModifiers; + + function parseClassProperty() { + if (_base.isTypeScriptEnabled) { + _tokenizer.eatTypeToken.call(void 0, _types.TokenType.bang); + _typescript.tsTryParseTypeAnnotation.call(void 0, ); + } else if (_base.isFlowEnabled) { + if (_tokenizer.match.call(void 0, _types.TokenType.colon)) { + _flow.flowParseTypeAnnotation.call(void 0, ); + } + } + + if (_tokenizer.match.call(void 0, _types.TokenType.eq)) { + const equalsTokenIndex = _base.state.tokens.length; + _tokenizer.next.call(void 0, ); + _expression.parseMaybeAssign.call(void 0, ); + _base.state.tokens[equalsTokenIndex].rhsEndIndex = _base.state.tokens.length; + } + _util.semicolon.call(void 0, ); +} exports.parseClassProperty = parseClassProperty; + +function parseClassId(isStatement, optionalId = false) { + if ( + _base.isTypeScriptEnabled && + (!isStatement || optionalId) && + _util.isContextual.call(void 0, _keywords.ContextualKeyword._implements) + ) { + return; + } + + if (_tokenizer.match.call(void 0, _types.TokenType.name)) { + _lval.parseBindingIdentifier.call(void 0, true); + } + + if (_base.isTypeScriptEnabled) { + _typescript.tsTryParseTypeParameters.call(void 0, ); + } else if (_base.isFlowEnabled) { + if (_tokenizer.match.call(void 0, _types.TokenType.lessThan)) { + _flow.flowParseTypeParameterDeclaration.call(void 0, ); + } + } +} + +// Returns true if there was a superclass. +function parseClassSuper() { + let hasSuper = false; + if (_tokenizer.eat.call(void 0, _types.TokenType._extends)) { + _expression.parseExprSubscripts.call(void 0, ); + hasSuper = true; + } else { + hasSuper = false; + } + if (_base.isTypeScriptEnabled) { + _typescript.tsAfterParseClassSuper.call(void 0, hasSuper); + } else if (_base.isFlowEnabled) { + _flow.flowAfterParseClassSuper.call(void 0, hasSuper); + } +} + +// Parses module export declaration. + + function parseExport() { + const exportIndex = _base.state.tokens.length - 1; + if (_base.isTypeScriptEnabled) { + if (_typescript.tsTryParseExport.call(void 0, )) { + return; + } + } + // export * from '...' + if (shouldParseExportStar()) { + parseExportStar(); + } else if (isExportDefaultSpecifier()) { + // export default from + _expression.parseIdentifier.call(void 0, ); + if (_tokenizer.match.call(void 0, _types.TokenType.comma) && _tokenizer.lookaheadType.call(void 0, ) === _types.TokenType.star) { + _util.expect.call(void 0, _types.TokenType.comma); + _util.expect.call(void 0, _types.TokenType.star); + _util.expectContextual.call(void 0, _keywords.ContextualKeyword._as); + _expression.parseIdentifier.call(void 0, ); + } else { + parseExportSpecifiersMaybe(); + } + parseExportFrom(); + } else if (_tokenizer.eat.call(void 0, _types.TokenType._default)) { + // export default ... + parseExportDefaultExpression(); + } else if (shouldParseExportDeclaration()) { + parseExportDeclaration(); + } else { + // export { x, y as z } [from '...'] + parseExportSpecifiers(); + parseExportFrom(); + } + _base.state.tokens[exportIndex].rhsEndIndex = _base.state.tokens.length; +} exports.parseExport = parseExport; + +function parseExportDefaultExpression() { + if (_base.isTypeScriptEnabled) { + if (_typescript.tsTryParseExportDefaultExpression.call(void 0, )) { + return; + } + } + if (_base.isFlowEnabled) { + if (_flow.flowTryParseExportDefaultExpression.call(void 0, )) { + return; + } + } + const functionStart = _base.state.start; + if (_tokenizer.eat.call(void 0, _types.TokenType._function)) { + parseFunction(functionStart, true, true); + } else if (_util.isContextual.call(void 0, _keywords.ContextualKeyword._async) && _tokenizer.lookaheadType.call(void 0, ) === _types.TokenType._function) { + // async function declaration + _util.eatContextual.call(void 0, _keywords.ContextualKeyword._async); + _tokenizer.eat.call(void 0, _types.TokenType._function); + parseFunction(functionStart, true, true); + } else if (_tokenizer.match.call(void 0, _types.TokenType._class)) { + parseClass(true, true); + } else if (_tokenizer.match.call(void 0, _types.TokenType.at)) { + parseDecorators(); + parseClass(true, true); + } else { + _expression.parseMaybeAssign.call(void 0, ); + _util.semicolon.call(void 0, ); + } +} + +function parseExportDeclaration() { + if (_base.isTypeScriptEnabled) { + _typescript.tsParseExportDeclaration.call(void 0, ); + } else if (_base.isFlowEnabled) { + _flow.flowParseExportDeclaration.call(void 0, ); + } else { + parseStatement(true); + } +} + +function isExportDefaultSpecifier() { + if (_base.isTypeScriptEnabled && _typescript.tsIsDeclarationStart.call(void 0, )) { + return false; + } else if (_base.isFlowEnabled && _flow.flowShouldDisallowExportDefaultSpecifier.call(void 0, )) { + return false; + } + if (_tokenizer.match.call(void 0, _types.TokenType.name)) { + return _base.state.contextualKeyword !== _keywords.ContextualKeyword._async; + } + + if (!_tokenizer.match.call(void 0, _types.TokenType._default)) { + return false; + } + + const _next = _tokenizer.nextTokenStart.call(void 0, ); + const lookahead = _tokenizer.lookaheadTypeAndKeyword.call(void 0, ); + const hasFrom = + lookahead.type === _types.TokenType.name && lookahead.contextualKeyword === _keywords.ContextualKeyword._from; + if (lookahead.type === _types.TokenType.comma) { + return true; + } + // lookahead again when `export default from` is seen + if (hasFrom) { + const nextAfterFrom = _base.input.charCodeAt(_tokenizer.nextTokenStartSince.call(void 0, _next + 4)); + return nextAfterFrom === _charcodes.charCodes.quotationMark || nextAfterFrom === _charcodes.charCodes.apostrophe; + } + return false; +} + +function parseExportSpecifiersMaybe() { + if (_tokenizer.eat.call(void 0, _types.TokenType.comma)) { + parseExportSpecifiers(); + } +} + + function parseExportFrom() { + if (_util.eatContextual.call(void 0, _keywords.ContextualKeyword._from)) { + _expression.parseExprAtom.call(void 0, ); + maybeParseImportAttributes(); + } + _util.semicolon.call(void 0, ); +} exports.parseExportFrom = parseExportFrom; + +function shouldParseExportStar() { + if (_base.isFlowEnabled) { + return _flow.flowShouldParseExportStar.call(void 0, ); + } else { + return _tokenizer.match.call(void 0, _types.TokenType.star); + } +} + +function parseExportStar() { + if (_base.isFlowEnabled) { + _flow.flowParseExportStar.call(void 0, ); + } else { + baseParseExportStar(); + } +} + + function baseParseExportStar() { + _util.expect.call(void 0, _types.TokenType.star); + + if (_util.isContextual.call(void 0, _keywords.ContextualKeyword._as)) { + parseExportNamespace(); + } else { + parseExportFrom(); + } +} exports.baseParseExportStar = baseParseExportStar; + +function parseExportNamespace() { + _tokenizer.next.call(void 0, ); + _base.state.tokens[_base.state.tokens.length - 1].type = _types.TokenType._as; + _expression.parseIdentifier.call(void 0, ); + parseExportSpecifiersMaybe(); + parseExportFrom(); +} + +function shouldParseExportDeclaration() { + return ( + (_base.isTypeScriptEnabled && _typescript.tsIsDeclarationStart.call(void 0, )) || + (_base.isFlowEnabled && _flow.flowShouldParseExportDeclaration.call(void 0, )) || + _base.state.type === _types.TokenType._var || + _base.state.type === _types.TokenType._const || + _base.state.type === _types.TokenType._let || + _base.state.type === _types.TokenType._function || + _base.state.type === _types.TokenType._class || + _util.isContextual.call(void 0, _keywords.ContextualKeyword._async) || + _tokenizer.match.call(void 0, _types.TokenType.at) + ); +} + +// Parses a comma-separated list of module exports. + function parseExportSpecifiers() { + let first = true; + + // export { x, y as z } [from '...'] + _util.expect.call(void 0, _types.TokenType.braceL); + + while (!_tokenizer.eat.call(void 0, _types.TokenType.braceR) && !_base.state.error) { + if (first) { + first = false; + } else { + _util.expect.call(void 0, _types.TokenType.comma); + if (_tokenizer.eat.call(void 0, _types.TokenType.braceR)) { + break; + } + } + parseExportSpecifier(); + } +} exports.parseExportSpecifiers = parseExportSpecifiers; + +function parseExportSpecifier() { + if (_base.isTypeScriptEnabled) { + _typescript.tsParseExportSpecifier.call(void 0, ); + return; + } + _expression.parseIdentifier.call(void 0, ); + _base.state.tokens[_base.state.tokens.length - 1].identifierRole = _tokenizer.IdentifierRole.ExportAccess; + if (_util.eatContextual.call(void 0, _keywords.ContextualKeyword._as)) { + _expression.parseIdentifier.call(void 0, ); + } +} + +/** + * Starting at the `module` token in an import, determine if it was truly an + * import reflection token or just looks like one. + * + * Returns true for: + * import module foo from "foo"; + * import module from from "foo"; + * + * Returns false for: + * import module from "foo"; + * import module, {bar} from "foo"; + */ +function isImportReflection() { + const snapshot = _base.state.snapshot(); + _util.expectContextual.call(void 0, _keywords.ContextualKeyword._module); + if (_util.eatContextual.call(void 0, _keywords.ContextualKeyword._from)) { + if (_util.isContextual.call(void 0, _keywords.ContextualKeyword._from)) { + _base.state.restoreFromSnapshot(snapshot); + return true; + } else { + _base.state.restoreFromSnapshot(snapshot); + return false; + } + } else if (_tokenizer.match.call(void 0, _types.TokenType.comma)) { + _base.state.restoreFromSnapshot(snapshot); + return false; + } else { + _base.state.restoreFromSnapshot(snapshot); + return true; + } +} + +/** + * Eat the "module" token from the import reflection proposal. + * https://github.com/tc39/proposal-import-reflection + */ +function parseMaybeImportReflection() { + // isImportReflection does snapshot/restore, so only run it if we see the word + // "module". + if (_util.isContextual.call(void 0, _keywords.ContextualKeyword._module) && isImportReflection()) { + _tokenizer.next.call(void 0, ); + } +} + +// Parses import declaration. + + function parseImport() { + if (_base.isTypeScriptEnabled && _tokenizer.match.call(void 0, _types.TokenType.name) && _tokenizer.lookaheadType.call(void 0, ) === _types.TokenType.eq) { + _typescript.tsParseImportEqualsDeclaration.call(void 0, ); + return; + } + if (_base.isTypeScriptEnabled && _util.isContextual.call(void 0, _keywords.ContextualKeyword._type)) { + const lookahead = _tokenizer.lookaheadTypeAndKeyword.call(void 0, ); + if (lookahead.type === _types.TokenType.name && lookahead.contextualKeyword !== _keywords.ContextualKeyword._from) { + // One of these `import type` cases: + // import type T = require('T'); + // import type A from 'A'; + _util.expectContextual.call(void 0, _keywords.ContextualKeyword._type); + if (_tokenizer.lookaheadType.call(void 0, ) === _types.TokenType.eq) { + _typescript.tsParseImportEqualsDeclaration.call(void 0, ); + return; + } + // If this is an `import type...from` statement, then we already ate the + // type token, so proceed to the regular import parser. + } else if (lookahead.type === _types.TokenType.star || lookahead.type === _types.TokenType.braceL) { + // One of these `import type` cases, in which case we can eat the type token + // and proceed as normal: + // import type * as A from 'A'; + // import type {a} from 'A'; + _util.expectContextual.call(void 0, _keywords.ContextualKeyword._type); + } + // Otherwise, we are importing the name "type". + } + + // import '...' + if (_tokenizer.match.call(void 0, _types.TokenType.string)) { + _expression.parseExprAtom.call(void 0, ); + } else { + parseMaybeImportReflection(); + parseImportSpecifiers(); + _util.expectContextual.call(void 0, _keywords.ContextualKeyword._from); + _expression.parseExprAtom.call(void 0, ); + } + maybeParseImportAttributes(); + _util.semicolon.call(void 0, ); +} exports.parseImport = parseImport; + +// eslint-disable-next-line no-unused-vars +function shouldParseDefaultImport() { + return _tokenizer.match.call(void 0, _types.TokenType.name); +} + +function parseImportSpecifierLocal() { + _lval.parseImportedIdentifier.call(void 0, ); +} + +// Parses a comma-separated list of module imports. +function parseImportSpecifiers() { + if (_base.isFlowEnabled) { + _flow.flowStartParseImportSpecifiers.call(void 0, ); + } + + let first = true; + if (shouldParseDefaultImport()) { + // import defaultObj, { x, y as z } from '...' + parseImportSpecifierLocal(); + + if (!_tokenizer.eat.call(void 0, _types.TokenType.comma)) return; + } + + if (_tokenizer.match.call(void 0, _types.TokenType.star)) { + _tokenizer.next.call(void 0, ); + _util.expectContextual.call(void 0, _keywords.ContextualKeyword._as); + + parseImportSpecifierLocal(); + + return; + } + + _util.expect.call(void 0, _types.TokenType.braceL); + while (!_tokenizer.eat.call(void 0, _types.TokenType.braceR) && !_base.state.error) { + if (first) { + first = false; + } else { + // Detect an attempt to deep destructure + if (_tokenizer.eat.call(void 0, _types.TokenType.colon)) { + _util.unexpected.call(void 0, + "ES2015 named imports do not destructure. Use another statement for destructuring after the import.", + ); + } + + _util.expect.call(void 0, _types.TokenType.comma); + if (_tokenizer.eat.call(void 0, _types.TokenType.braceR)) { + break; + } + } + + parseImportSpecifier(); + } +} + +function parseImportSpecifier() { + if (_base.isTypeScriptEnabled) { + _typescript.tsParseImportSpecifier.call(void 0, ); + return; + } + if (_base.isFlowEnabled) { + _flow.flowParseImportSpecifier.call(void 0, ); + return; + } + _lval.parseImportedIdentifier.call(void 0, ); + if (_util.isContextual.call(void 0, _keywords.ContextualKeyword._as)) { + _base.state.tokens[_base.state.tokens.length - 1].identifierRole = _tokenizer.IdentifierRole.ImportAccess; + _tokenizer.next.call(void 0, ); + _lval.parseImportedIdentifier.call(void 0, ); + } +} + +/** + * Parse import attributes like `with {type: "json"}`, or the legacy form + * `assert {type: "json"}`. + * + * Import attributes technically have their own syntax, but are always parseable + * as a plain JS object, so just do that for simplicity. + */ +function maybeParseImportAttributes() { + if (_tokenizer.match.call(void 0, _types.TokenType._with) || (_util.isContextual.call(void 0, _keywords.ContextualKeyword._assert) && !_util.hasPrecedingLineBreak.call(void 0, ))) { + _tokenizer.next.call(void 0, ); + _expression.parseObj.call(void 0, false, false); + } +} Index: frontend/node_modules/sucrase/dist/parser/traverser/util.js =================================================================== --- frontend/node_modules/sucrase/dist/parser/traverser/util.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/parser/traverser/util.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,104 @@ +"use strict";Object.defineProperty(exports, "__esModule", {value: true});var _index = require('../tokenizer/index'); + +var _types = require('../tokenizer/types'); +var _charcodes = require('../util/charcodes'); +var _base = require('./base'); + +// ## Parser utilities + +// Tests whether parsed token is a contextual keyword. + function isContextual(contextualKeyword) { + return _base.state.contextualKeyword === contextualKeyword; +} exports.isContextual = isContextual; + + function isLookaheadContextual(contextualKeyword) { + const l = _index.lookaheadTypeAndKeyword.call(void 0, ); + return l.type === _types.TokenType.name && l.contextualKeyword === contextualKeyword; +} exports.isLookaheadContextual = isLookaheadContextual; + +// Consumes contextual keyword if possible. + function eatContextual(contextualKeyword) { + return _base.state.contextualKeyword === contextualKeyword && _index.eat.call(void 0, _types.TokenType.name); +} exports.eatContextual = eatContextual; + +// Asserts that following token is given contextual keyword. + function expectContextual(contextualKeyword) { + if (!eatContextual(contextualKeyword)) { + unexpected(); + } +} exports.expectContextual = expectContextual; + +// Test whether a semicolon can be inserted at the current position. + function canInsertSemicolon() { + return _index.match.call(void 0, _types.TokenType.eof) || _index.match.call(void 0, _types.TokenType.braceR) || hasPrecedingLineBreak(); +} exports.canInsertSemicolon = canInsertSemicolon; + + function hasPrecedingLineBreak() { + const prevToken = _base.state.tokens[_base.state.tokens.length - 1]; + const lastTokEnd = prevToken ? prevToken.end : 0; + for (let i = lastTokEnd; i < _base.state.start; i++) { + const code = _base.input.charCodeAt(i); + if ( + code === _charcodes.charCodes.lineFeed || + code === _charcodes.charCodes.carriageReturn || + code === 0x2028 || + code === 0x2029 + ) { + return true; + } + } + return false; +} exports.hasPrecedingLineBreak = hasPrecedingLineBreak; + + function hasFollowingLineBreak() { + const nextStart = _index.nextTokenStart.call(void 0, ); + for (let i = _base.state.end; i < nextStart; i++) { + const code = _base.input.charCodeAt(i); + if ( + code === _charcodes.charCodes.lineFeed || + code === _charcodes.charCodes.carriageReturn || + code === 0x2028 || + code === 0x2029 + ) { + return true; + } + } + return false; +} exports.hasFollowingLineBreak = hasFollowingLineBreak; + + function isLineTerminator() { + return _index.eat.call(void 0, _types.TokenType.semi) || canInsertSemicolon(); +} exports.isLineTerminator = isLineTerminator; + +// Consume a semicolon, or, failing that, see if we are allowed to +// pretend that there is a semicolon at this position. + function semicolon() { + if (!isLineTerminator()) { + unexpected('Unexpected token, expected ";"'); + } +} exports.semicolon = semicolon; + +// Expect a token of a given type. If found, consume it, otherwise, +// raise an unexpected token error at given pos. + function expect(type) { + const matched = _index.eat.call(void 0, type); + if (!matched) { + unexpected(`Unexpected token, expected "${_types.formatTokenType.call(void 0, type)}"`); + } +} exports.expect = expect; + +/** + * Transition the parser to an error state. All code needs to be written to naturally unwind in this + * state, which allows us to backtrack without exceptions and without error plumbing everywhere. + */ + function unexpected(message = "Unexpected token", pos = _base.state.start) { + if (_base.state.error) { + return; + } + // eslint-disable-next-line @typescript-eslint/no-explicit-any + const err = new SyntaxError(message); + err.pos = pos; + _base.state.error = err; + _base.state.pos = _base.input.length; + _index.finishToken.call(void 0, _types.TokenType.eof); +} exports.unexpected = unexpected; Index: frontend/node_modules/sucrase/dist/parser/util/charcodes.js =================================================================== --- frontend/node_modules/sucrase/dist/parser/util/charcodes.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/parser/util/charcodes.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,115 @@ +"use strict";Object.defineProperty(exports, "__esModule", {value: true});var charCodes; (function (charCodes) { + const backSpace = 8; charCodes[charCodes["backSpace"] = backSpace] = "backSpace"; + const lineFeed = 10; charCodes[charCodes["lineFeed"] = lineFeed] = "lineFeed"; // '\n' + const tab = 9; charCodes[charCodes["tab"] = tab] = "tab"; // '\t' + const carriageReturn = 13; charCodes[charCodes["carriageReturn"] = carriageReturn] = "carriageReturn"; // '\r' + const shiftOut = 14; charCodes[charCodes["shiftOut"] = shiftOut] = "shiftOut"; + const space = 32; charCodes[charCodes["space"] = space] = "space"; + const exclamationMark = 33; charCodes[charCodes["exclamationMark"] = exclamationMark] = "exclamationMark"; // '!' + const quotationMark = 34; charCodes[charCodes["quotationMark"] = quotationMark] = "quotationMark"; // '"' + const numberSign = 35; charCodes[charCodes["numberSign"] = numberSign] = "numberSign"; // '#' + const dollarSign = 36; charCodes[charCodes["dollarSign"] = dollarSign] = "dollarSign"; // '$' + const percentSign = 37; charCodes[charCodes["percentSign"] = percentSign] = "percentSign"; // '%' + const ampersand = 38; charCodes[charCodes["ampersand"] = ampersand] = "ampersand"; // '&' + const apostrophe = 39; charCodes[charCodes["apostrophe"] = apostrophe] = "apostrophe"; // ''' + const leftParenthesis = 40; charCodes[charCodes["leftParenthesis"] = leftParenthesis] = "leftParenthesis"; // '(' + const rightParenthesis = 41; charCodes[charCodes["rightParenthesis"] = rightParenthesis] = "rightParenthesis"; // ')' + const asterisk = 42; charCodes[charCodes["asterisk"] = asterisk] = "asterisk"; // '*' + const plusSign = 43; charCodes[charCodes["plusSign"] = plusSign] = "plusSign"; // '+' + const comma = 44; charCodes[charCodes["comma"] = comma] = "comma"; // ',' + const dash = 45; charCodes[charCodes["dash"] = dash] = "dash"; // '-' + const dot = 46; charCodes[charCodes["dot"] = dot] = "dot"; // '.' + const slash = 47; charCodes[charCodes["slash"] = slash] = "slash"; // '/' + const digit0 = 48; charCodes[charCodes["digit0"] = digit0] = "digit0"; // '0' + const digit1 = 49; charCodes[charCodes["digit1"] = digit1] = "digit1"; // '1' + const digit2 = 50; charCodes[charCodes["digit2"] = digit2] = "digit2"; // '2' + const digit3 = 51; charCodes[charCodes["digit3"] = digit3] = "digit3"; // '3' + const digit4 = 52; charCodes[charCodes["digit4"] = digit4] = "digit4"; // '4' + const digit5 = 53; charCodes[charCodes["digit5"] = digit5] = "digit5"; // '5' + const digit6 = 54; charCodes[charCodes["digit6"] = digit6] = "digit6"; // '6' + const digit7 = 55; charCodes[charCodes["digit7"] = digit7] = "digit7"; // '7' + const digit8 = 56; charCodes[charCodes["digit8"] = digit8] = "digit8"; // '8' + const digit9 = 57; charCodes[charCodes["digit9"] = digit9] = "digit9"; // '9' + const colon = 58; charCodes[charCodes["colon"] = colon] = "colon"; // ':' + const semicolon = 59; charCodes[charCodes["semicolon"] = semicolon] = "semicolon"; // ';' + const lessThan = 60; charCodes[charCodes["lessThan"] = lessThan] = "lessThan"; // '<' + const equalsTo = 61; charCodes[charCodes["equalsTo"] = equalsTo] = "equalsTo"; // '=' + const greaterThan = 62; charCodes[charCodes["greaterThan"] = greaterThan] = "greaterThan"; // '>' + const questionMark = 63; charCodes[charCodes["questionMark"] = questionMark] = "questionMark"; // '?' + const atSign = 64; charCodes[charCodes["atSign"] = atSign] = "atSign"; // '@' + const uppercaseA = 65; charCodes[charCodes["uppercaseA"] = uppercaseA] = "uppercaseA"; // 'A' + const uppercaseB = 66; charCodes[charCodes["uppercaseB"] = uppercaseB] = "uppercaseB"; // 'B' + const uppercaseC = 67; charCodes[charCodes["uppercaseC"] = uppercaseC] = "uppercaseC"; // 'C' + const uppercaseD = 68; charCodes[charCodes["uppercaseD"] = uppercaseD] = "uppercaseD"; // 'D' + const uppercaseE = 69; charCodes[charCodes["uppercaseE"] = uppercaseE] = "uppercaseE"; // 'E' + const uppercaseF = 70; charCodes[charCodes["uppercaseF"] = uppercaseF] = "uppercaseF"; // 'F' + const uppercaseG = 71; charCodes[charCodes["uppercaseG"] = uppercaseG] = "uppercaseG"; // 'G' + const uppercaseH = 72; charCodes[charCodes["uppercaseH"] = uppercaseH] = "uppercaseH"; // 'H' + const uppercaseI = 73; charCodes[charCodes["uppercaseI"] = uppercaseI] = "uppercaseI"; // 'I' + const uppercaseJ = 74; charCodes[charCodes["uppercaseJ"] = uppercaseJ] = "uppercaseJ"; // 'J' + const uppercaseK = 75; charCodes[charCodes["uppercaseK"] = uppercaseK] = "uppercaseK"; // 'K' + const uppercaseL = 76; charCodes[charCodes["uppercaseL"] = uppercaseL] = "uppercaseL"; // 'L' + const uppercaseM = 77; charCodes[charCodes["uppercaseM"] = uppercaseM] = "uppercaseM"; // 'M' + const uppercaseN = 78; charCodes[charCodes["uppercaseN"] = uppercaseN] = "uppercaseN"; // 'N' + const uppercaseO = 79; charCodes[charCodes["uppercaseO"] = uppercaseO] = "uppercaseO"; // 'O' + const uppercaseP = 80; charCodes[charCodes["uppercaseP"] = uppercaseP] = "uppercaseP"; // 'P' + const uppercaseQ = 81; charCodes[charCodes["uppercaseQ"] = uppercaseQ] = "uppercaseQ"; // 'Q' + const uppercaseR = 82; charCodes[charCodes["uppercaseR"] = uppercaseR] = "uppercaseR"; // 'R' + const uppercaseS = 83; charCodes[charCodes["uppercaseS"] = uppercaseS] = "uppercaseS"; // 'S' + const uppercaseT = 84; charCodes[charCodes["uppercaseT"] = uppercaseT] = "uppercaseT"; // 'T' + const uppercaseU = 85; charCodes[charCodes["uppercaseU"] = uppercaseU] = "uppercaseU"; // 'U' + const uppercaseV = 86; charCodes[charCodes["uppercaseV"] = uppercaseV] = "uppercaseV"; // 'V' + const uppercaseW = 87; charCodes[charCodes["uppercaseW"] = uppercaseW] = "uppercaseW"; // 'W' + const uppercaseX = 88; charCodes[charCodes["uppercaseX"] = uppercaseX] = "uppercaseX"; // 'X' + const uppercaseY = 89; charCodes[charCodes["uppercaseY"] = uppercaseY] = "uppercaseY"; // 'Y' + const uppercaseZ = 90; charCodes[charCodes["uppercaseZ"] = uppercaseZ] = "uppercaseZ"; // 'Z' + const leftSquareBracket = 91; charCodes[charCodes["leftSquareBracket"] = leftSquareBracket] = "leftSquareBracket"; // '[' + const backslash = 92; charCodes[charCodes["backslash"] = backslash] = "backslash"; // '\ ' + const rightSquareBracket = 93; charCodes[charCodes["rightSquareBracket"] = rightSquareBracket] = "rightSquareBracket"; // ']' + const caret = 94; charCodes[charCodes["caret"] = caret] = "caret"; // '^' + const underscore = 95; charCodes[charCodes["underscore"] = underscore] = "underscore"; // '_' + const graveAccent = 96; charCodes[charCodes["graveAccent"] = graveAccent] = "graveAccent"; // '`' + const lowercaseA = 97; charCodes[charCodes["lowercaseA"] = lowercaseA] = "lowercaseA"; // 'a' + const lowercaseB = 98; charCodes[charCodes["lowercaseB"] = lowercaseB] = "lowercaseB"; // 'b' + const lowercaseC = 99; charCodes[charCodes["lowercaseC"] = lowercaseC] = "lowercaseC"; // 'c' + const lowercaseD = 100; charCodes[charCodes["lowercaseD"] = lowercaseD] = "lowercaseD"; // 'd' + const lowercaseE = 101; charCodes[charCodes["lowercaseE"] = lowercaseE] = "lowercaseE"; // 'e' + const lowercaseF = 102; charCodes[charCodes["lowercaseF"] = lowercaseF] = "lowercaseF"; // 'f' + const lowercaseG = 103; charCodes[charCodes["lowercaseG"] = lowercaseG] = "lowercaseG"; // 'g' + const lowercaseH = 104; charCodes[charCodes["lowercaseH"] = lowercaseH] = "lowercaseH"; // 'h' + const lowercaseI = 105; charCodes[charCodes["lowercaseI"] = lowercaseI] = "lowercaseI"; // 'i' + const lowercaseJ = 106; charCodes[charCodes["lowercaseJ"] = lowercaseJ] = "lowercaseJ"; // 'j' + const lowercaseK = 107; charCodes[charCodes["lowercaseK"] = lowercaseK] = "lowercaseK"; // 'k' + const lowercaseL = 108; charCodes[charCodes["lowercaseL"] = lowercaseL] = "lowercaseL"; // 'l' + const lowercaseM = 109; charCodes[charCodes["lowercaseM"] = lowercaseM] = "lowercaseM"; // 'm' + const lowercaseN = 110; charCodes[charCodes["lowercaseN"] = lowercaseN] = "lowercaseN"; // 'n' + const lowercaseO = 111; charCodes[charCodes["lowercaseO"] = lowercaseO] = "lowercaseO"; // 'o' + const lowercaseP = 112; charCodes[charCodes["lowercaseP"] = lowercaseP] = "lowercaseP"; // 'p' + const lowercaseQ = 113; charCodes[charCodes["lowercaseQ"] = lowercaseQ] = "lowercaseQ"; // 'q' + const lowercaseR = 114; charCodes[charCodes["lowercaseR"] = lowercaseR] = "lowercaseR"; // 'r' + const lowercaseS = 115; charCodes[charCodes["lowercaseS"] = lowercaseS] = "lowercaseS"; // 's' + const lowercaseT = 116; charCodes[charCodes["lowercaseT"] = lowercaseT] = "lowercaseT"; // 't' + const lowercaseU = 117; charCodes[charCodes["lowercaseU"] = lowercaseU] = "lowercaseU"; // 'u' + const lowercaseV = 118; charCodes[charCodes["lowercaseV"] = lowercaseV] = "lowercaseV"; // 'v' + const lowercaseW = 119; charCodes[charCodes["lowercaseW"] = lowercaseW] = "lowercaseW"; // 'w' + const lowercaseX = 120; charCodes[charCodes["lowercaseX"] = lowercaseX] = "lowercaseX"; // 'x' + const lowercaseY = 121; charCodes[charCodes["lowercaseY"] = lowercaseY] = "lowercaseY"; // 'y' + const lowercaseZ = 122; charCodes[charCodes["lowercaseZ"] = lowercaseZ] = "lowercaseZ"; // 'z' + const leftCurlyBrace = 123; charCodes[charCodes["leftCurlyBrace"] = leftCurlyBrace] = "leftCurlyBrace"; // '{' + const verticalBar = 124; charCodes[charCodes["verticalBar"] = verticalBar] = "verticalBar"; // '|' + const rightCurlyBrace = 125; charCodes[charCodes["rightCurlyBrace"] = rightCurlyBrace] = "rightCurlyBrace"; // '}' + const tilde = 126; charCodes[charCodes["tilde"] = tilde] = "tilde"; // '~' + const nonBreakingSpace = 160; charCodes[charCodes["nonBreakingSpace"] = nonBreakingSpace] = "nonBreakingSpace"; + // eslint-disable-next-line no-irregular-whitespace + const oghamSpaceMark = 5760; charCodes[charCodes["oghamSpaceMark"] = oghamSpaceMark] = "oghamSpaceMark"; // ' ' + const lineSeparator = 8232; charCodes[charCodes["lineSeparator"] = lineSeparator] = "lineSeparator"; + const paragraphSeparator = 8233; charCodes[charCodes["paragraphSeparator"] = paragraphSeparator] = "paragraphSeparator"; +})(charCodes || (exports.charCodes = charCodes = {})); + + function isDigit(code) { + return ( + (code >= charCodes.digit0 && code <= charCodes.digit9) || + (code >= charCodes.lowercaseA && code <= charCodes.lowercaseF) || + (code >= charCodes.uppercaseA && code <= charCodes.uppercaseF) + ); +} exports.isDigit = isDigit; Index: frontend/node_modules/sucrase/dist/parser/util/identifier.js =================================================================== --- frontend/node_modules/sucrase/dist/parser/util/identifier.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/parser/util/identifier.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,34 @@ +"use strict";Object.defineProperty(exports, "__esModule", {value: true});var _charcodes = require('./charcodes'); +var _whitespace = require('./whitespace'); + +function computeIsIdentifierChar(code) { + if (code < 48) return code === 36; + if (code < 58) return true; + if (code < 65) return false; + if (code < 91) return true; + if (code < 97) return code === 95; + if (code < 123) return true; + if (code < 128) return false; + throw new Error("Should not be called with non-ASCII char code."); +} + + const IS_IDENTIFIER_CHAR = new Uint8Array(65536); exports.IS_IDENTIFIER_CHAR = IS_IDENTIFIER_CHAR; +for (let i = 0; i < 128; i++) { + exports.IS_IDENTIFIER_CHAR[i] = computeIsIdentifierChar(i) ? 1 : 0; +} +for (let i = 128; i < 65536; i++) { + exports.IS_IDENTIFIER_CHAR[i] = 1; +} +// Aside from whitespace and newlines, all characters outside the ASCII space are either +// identifier characters or invalid. Since we're not performing code validation, we can just +// treat all invalid characters as identifier characters. +for (const whitespaceChar of _whitespace.WHITESPACE_CHARS) { + exports.IS_IDENTIFIER_CHAR[whitespaceChar] = 0; +} +exports.IS_IDENTIFIER_CHAR[0x2028] = 0; +exports.IS_IDENTIFIER_CHAR[0x2029] = 0; + + const IS_IDENTIFIER_START = exports.IS_IDENTIFIER_CHAR.slice(); exports.IS_IDENTIFIER_START = IS_IDENTIFIER_START; +for (let numChar = _charcodes.charCodes.digit0; numChar <= _charcodes.charCodes.digit9; numChar++) { + exports.IS_IDENTIFIER_START[numChar] = 0; +} Index: frontend/node_modules/sucrase/dist/parser/util/whitespace.js =================================================================== --- frontend/node_modules/sucrase/dist/parser/util/whitespace.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/parser/util/whitespace.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,33 @@ +"use strict";Object.defineProperty(exports, "__esModule", {value: true});var _charcodes = require('./charcodes'); + +// https://tc39.github.io/ecma262/#sec-white-space + const WHITESPACE_CHARS = [ + 0x0009, + 0x000b, + 0x000c, + _charcodes.charCodes.space, + _charcodes.charCodes.nonBreakingSpace, + _charcodes.charCodes.oghamSpaceMark, + 0x2000, // EN QUAD + 0x2001, // EM QUAD + 0x2002, // EN SPACE + 0x2003, // EM SPACE + 0x2004, // THREE-PER-EM SPACE + 0x2005, // FOUR-PER-EM SPACE + 0x2006, // SIX-PER-EM SPACE + 0x2007, // FIGURE SPACE + 0x2008, // PUNCTUATION SPACE + 0x2009, // THIN SPACE + 0x200a, // HAIR SPACE + 0x202f, // NARROW NO-BREAK SPACE + 0x205f, // MEDIUM MATHEMATICAL SPACE + 0x3000, // IDEOGRAPHIC SPACE + 0xfeff, // ZERO WIDTH NO-BREAK SPACE +]; exports.WHITESPACE_CHARS = WHITESPACE_CHARS; + + const skipWhiteSpace = /(?:\s|\/\/.*|\/\*[^]*?\*\/)*/g; exports.skipWhiteSpace = skipWhiteSpace; + + const IS_WHITESPACE = new Uint8Array(65536); exports.IS_WHITESPACE = IS_WHITESPACE; +for (const char of exports.WHITESPACE_CHARS) { + exports.IS_WHITESPACE[char] = 1; +} Index: frontend/node_modules/sucrase/dist/register.js =================================================================== --- frontend/node_modules/sucrase/dist/register.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/register.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,88 @@ +"use strict";Object.defineProperty(exports, "__esModule", {value: true}); function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { newObj[key] = obj[key]; } } } newObj.default = obj; return newObj; } }var _pirates = require('pirates'); var pirates = _interopRequireWildcard(_pirates); + +var _index = require('./index'); + + + + + + + + + function addHook( + extension, + sucraseOptions, + hookOptions, +) { + let mergedSucraseOptions = sucraseOptions; + const sucraseOptionsEnvJSON = process.env.SUCRASE_OPTIONS; + if (sucraseOptionsEnvJSON) { + mergedSucraseOptions = {...mergedSucraseOptions, ...JSON.parse(sucraseOptionsEnvJSON)}; + } + return pirates.addHook( + (code, filePath) => { + const {code: transformedCode, sourceMap} = _index.transform.call(void 0, code, { + ...mergedSucraseOptions, + sourceMapOptions: {compiledFilename: filePath}, + filePath, + }); + const mapBase64 = Buffer.from(JSON.stringify(sourceMap)).toString("base64"); + const suffix = `//# sourceMappingURL=data:application/json;charset=utf-8;base64,${mapBase64}`; + return `${transformedCode}\n${suffix}`; + }, + {...hookOptions, exts: [extension]}, + ); +} exports.addHook = addHook; + + function registerJS(hookOptions) { + return addHook(".js", {transforms: ["imports", "flow", "jsx"]}, hookOptions); +} exports.registerJS = registerJS; + + function registerJSX(hookOptions) { + return addHook(".jsx", {transforms: ["imports", "flow", "jsx"]}, hookOptions); +} exports.registerJSX = registerJSX; + + function registerTS(hookOptions) { + return addHook(".ts", {transforms: ["imports", "typescript"]}, hookOptions); +} exports.registerTS = registerTS; + + function registerTSX(hookOptions) { + return addHook(".tsx", {transforms: ["imports", "typescript", "jsx"]}, hookOptions); +} exports.registerTSX = registerTSX; + + function registerTSLegacyModuleInterop(hookOptions) { + return addHook( + ".ts", + { + transforms: ["imports", "typescript"], + enableLegacyTypeScriptModuleInterop: true, + }, + hookOptions, + ); +} exports.registerTSLegacyModuleInterop = registerTSLegacyModuleInterop; + + function registerTSXLegacyModuleInterop(hookOptions) { + return addHook( + ".tsx", + { + transforms: ["imports", "typescript", "jsx"], + enableLegacyTypeScriptModuleInterop: true, + }, + hookOptions, + ); +} exports.registerTSXLegacyModuleInterop = registerTSXLegacyModuleInterop; + + function registerAll(hookOptions) { + const reverts = [ + registerJS(hookOptions), + registerJSX(hookOptions), + registerTS(hookOptions), + registerTSX(hookOptions), + ]; + + return () => { + for (const fn of reverts) { + fn(); + } + }; +} exports.registerAll = registerAll; Index: frontend/node_modules/sucrase/dist/transformers/CJSImportTransformer.js =================================================================== --- frontend/node_modules/sucrase/dist/transformers/CJSImportTransformer.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/transformers/CJSImportTransformer.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,916 @@ +"use strict";Object.defineProperty(exports, "__esModule", {value: true}); function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; } + + +var _tokenizer = require('../parser/tokenizer'); +var _keywords = require('../parser/tokenizer/keywords'); +var _types = require('../parser/tokenizer/types'); + +var _elideImportEquals = require('../util/elideImportEquals'); var _elideImportEquals2 = _interopRequireDefault(_elideImportEquals); + + + +var _getDeclarationInfo = require('../util/getDeclarationInfo'); var _getDeclarationInfo2 = _interopRequireDefault(_getDeclarationInfo); +var _getImportExportSpecifierInfo = require('../util/getImportExportSpecifierInfo'); var _getImportExportSpecifierInfo2 = _interopRequireDefault(_getImportExportSpecifierInfo); +var _isExportFrom = require('../util/isExportFrom'); var _isExportFrom2 = _interopRequireDefault(_isExportFrom); +var _removeMaybeImportAttributes = require('../util/removeMaybeImportAttributes'); +var _shouldElideDefaultExport = require('../util/shouldElideDefaultExport'); var _shouldElideDefaultExport2 = _interopRequireDefault(_shouldElideDefaultExport); + + +var _Transformer = require('./Transformer'); var _Transformer2 = _interopRequireDefault(_Transformer); + +/** + * Class for editing import statements when we are transforming to commonjs. + */ + class CJSImportTransformer extends _Transformer2.default { + __init() {this.hadExport = false} + __init2() {this.hadNamedExport = false} + __init3() {this.hadDefaultExport = false} + + + constructor( + rootTransformer, + tokens, + importProcessor, + nameManager, + helperManager, + reactHotLoaderTransformer, + enableLegacyBabel5ModuleInterop, + enableLegacyTypeScriptModuleInterop, + isTypeScriptTransformEnabled, + isFlowTransformEnabled, + preserveDynamicImport, + keepUnusedImports, + ) { + super();this.rootTransformer = rootTransformer;this.tokens = tokens;this.importProcessor = importProcessor;this.nameManager = nameManager;this.helperManager = helperManager;this.reactHotLoaderTransformer = reactHotLoaderTransformer;this.enableLegacyBabel5ModuleInterop = enableLegacyBabel5ModuleInterop;this.enableLegacyTypeScriptModuleInterop = enableLegacyTypeScriptModuleInterop;this.isTypeScriptTransformEnabled = isTypeScriptTransformEnabled;this.isFlowTransformEnabled = isFlowTransformEnabled;this.preserveDynamicImport = preserveDynamicImport;this.keepUnusedImports = keepUnusedImports;CJSImportTransformer.prototype.__init.call(this);CJSImportTransformer.prototype.__init2.call(this);CJSImportTransformer.prototype.__init3.call(this);; + this.declarationInfo = isTypeScriptTransformEnabled + ? _getDeclarationInfo2.default.call(void 0, tokens) + : _getDeclarationInfo.EMPTY_DECLARATION_INFO; + } + + getPrefixCode() { + let prefix = ""; + if (this.hadExport) { + prefix += 'Object.defineProperty(exports, "__esModule", {value: true});'; + } + return prefix; + } + + getSuffixCode() { + if (this.enableLegacyBabel5ModuleInterop && this.hadDefaultExport && !this.hadNamedExport) { + return "\nmodule.exports = exports.default;\n"; + } + return ""; + } + + process() { + // TypeScript `import foo = require('foo');` should always just be translated to plain require. + if (this.tokens.matches3(_types.TokenType._import, _types.TokenType.name, _types.TokenType.eq)) { + return this.processImportEquals(); + } + if (this.tokens.matches1(_types.TokenType._import)) { + this.processImport(); + return true; + } + if (this.tokens.matches2(_types.TokenType._export, _types.TokenType.eq)) { + this.tokens.replaceToken("module.exports"); + return true; + } + if (this.tokens.matches1(_types.TokenType._export) && !this.tokens.currentToken().isType) { + this.hadExport = true; + return this.processExport(); + } + if (this.tokens.matches2(_types.TokenType.name, _types.TokenType.postIncDec)) { + // Fall through to normal identifier matching if this doesn't apply. + if (this.processPostIncDec()) { + return true; + } + } + if (this.tokens.matches1(_types.TokenType.name) || this.tokens.matches1(_types.TokenType.jsxName)) { + return this.processIdentifier(); + } + if (this.tokens.matches1(_types.TokenType.eq)) { + return this.processAssignment(); + } + if (this.tokens.matches1(_types.TokenType.assign)) { + return this.processComplexAssignment(); + } + if (this.tokens.matches1(_types.TokenType.preIncDec)) { + return this.processPreIncDec(); + } + return false; + } + + processImportEquals() { + const importName = this.tokens.identifierNameAtIndex(this.tokens.currentIndex() + 1); + if (this.importProcessor.shouldAutomaticallyElideImportedName(importName)) { + // If this name is only used as a type, elide the whole import. + _elideImportEquals2.default.call(void 0, this.tokens); + } else { + // Otherwise, switch `import` to `const`. + this.tokens.replaceToken("const"); + } + return true; + } + + /** + * Transform this: + * import foo, {bar} from 'baz'; + * into + * var _baz = require('baz'); var _baz2 = _interopRequireDefault(_baz); + * + * The import code was already generated in the import preprocessing step, so + * we just need to look it up. + */ + processImport() { + if (this.tokens.matches2(_types.TokenType._import, _types.TokenType.parenL)) { + if (this.preserveDynamicImport) { + // Bail out, only making progress for this one token. + this.tokens.copyToken(); + return; + } + const requireWrapper = this.enableLegacyTypeScriptModuleInterop + ? "" + : `${this.helperManager.getHelperName("interopRequireWildcard")}(`; + this.tokens.replaceToken(`Promise.resolve().then(() => ${requireWrapper}require`); + const contextId = this.tokens.currentToken().contextId; + if (contextId == null) { + throw new Error("Expected context ID on dynamic import invocation."); + } + this.tokens.copyToken(); + while (!this.tokens.matchesContextIdAndLabel(_types.TokenType.parenR, contextId)) { + this.rootTransformer.processToken(); + } + this.tokens.replaceToken(requireWrapper ? ")))" : "))"); + return; + } + + const shouldElideImport = this.removeImportAndDetectIfShouldElide(); + if (shouldElideImport) { + this.tokens.removeToken(); + } else { + const path = this.tokens.stringValue(); + this.tokens.replaceTokenTrimmingLeftWhitespace(this.importProcessor.claimImportCode(path)); + this.tokens.appendCode(this.importProcessor.claimImportCode(path)); + } + _removeMaybeImportAttributes.removeMaybeImportAttributes.call(void 0, this.tokens); + if (this.tokens.matches1(_types.TokenType.semi)) { + this.tokens.removeToken(); + } + } + + /** + * Erase this import (since any CJS output would be completely different), and + * return true if this import is should be elided due to being a type-only + * import. Such imports will not be emitted at all to avoid side effects. + * + * Import elision only happens with the TypeScript or Flow transforms enabled. + * + * TODO: This function has some awkward overlap with + * CJSImportProcessor.pruneTypeOnlyImports , and the two should be unified. + * That function handles TypeScript implicit import name elision, and removes + * an import if all typical imported names (without `type`) are removed due + * to being type-only imports. This function handles Flow import removal and + * properly distinguishes `import 'foo'` from `import {} from 'foo'` for TS + * purposes. + * + * The position should end at the import string. + */ + removeImportAndDetectIfShouldElide() { + this.tokens.removeInitialToken(); + if ( + this.tokens.matchesContextual(_keywords.ContextualKeyword._type) && + !this.tokens.matches1AtIndex(this.tokens.currentIndex() + 1, _types.TokenType.comma) && + !this.tokens.matchesContextualAtIndex(this.tokens.currentIndex() + 1, _keywords.ContextualKeyword._from) + ) { + // This is an "import type" statement, so exit early. + this.removeRemainingImport(); + return true; + } + + if (this.tokens.matches1(_types.TokenType.name) || this.tokens.matches1(_types.TokenType.star)) { + // We have a default import or namespace import, so there must be some + // non-type import. + this.removeRemainingImport(); + return false; + } + + if (this.tokens.matches1(_types.TokenType.string)) { + // This is a bare import, so we should proceed with the import. + return false; + } + + let foundNonTypeImport = false; + let foundAnyNamedImport = false; + while (!this.tokens.matches1(_types.TokenType.string)) { + // Check if any named imports are of the form "foo" or "foo as bar", with + // no leading "type". + if ( + (!foundNonTypeImport && this.tokens.matches1(_types.TokenType.braceL)) || + this.tokens.matches1(_types.TokenType.comma) + ) { + this.tokens.removeToken(); + if (!this.tokens.matches1(_types.TokenType.braceR)) { + foundAnyNamedImport = true; + } + if ( + this.tokens.matches2(_types.TokenType.name, _types.TokenType.comma) || + this.tokens.matches2(_types.TokenType.name, _types.TokenType.braceR) || + this.tokens.matches4(_types.TokenType.name, _types.TokenType.name, _types.TokenType.name, _types.TokenType.comma) || + this.tokens.matches4(_types.TokenType.name, _types.TokenType.name, _types.TokenType.name, _types.TokenType.braceR) + ) { + foundNonTypeImport = true; + } + } + this.tokens.removeToken(); + } + if (this.keepUnusedImports) { + return false; + } + if (this.isTypeScriptTransformEnabled) { + return !foundNonTypeImport; + } else if (this.isFlowTransformEnabled) { + // In Flow, unlike TS, `import {} from 'foo';` preserves the import. + return foundAnyNamedImport && !foundNonTypeImport; + } else { + return false; + } + } + + removeRemainingImport() { + while (!this.tokens.matches1(_types.TokenType.string)) { + this.tokens.removeToken(); + } + } + + processIdentifier() { + const token = this.tokens.currentToken(); + if (token.shadowsGlobal) { + return false; + } + + if (token.identifierRole === _tokenizer.IdentifierRole.ObjectShorthand) { + return this.processObjectShorthand(); + } + + if (token.identifierRole !== _tokenizer.IdentifierRole.Access) { + return false; + } + const replacement = this.importProcessor.getIdentifierReplacement( + this.tokens.identifierNameForToken(token), + ); + if (!replacement) { + return false; + } + // Tolerate any number of closing parens while looking for an opening paren + // that indicates a function call. + let possibleOpenParenIndex = this.tokens.currentIndex() + 1; + while ( + possibleOpenParenIndex < this.tokens.tokens.length && + this.tokens.tokens[possibleOpenParenIndex].type === _types.TokenType.parenR + ) { + possibleOpenParenIndex++; + } + // Avoid treating imported functions as methods of their `exports` object + // by using `(0, f)` when the identifier is in a paren expression. Else + // use `Function.prototype.call` when the identifier is a guaranteed + // function call. When using `call`, pass undefined as the context. + if (this.tokens.tokens[possibleOpenParenIndex].type === _types.TokenType.parenL) { + if ( + this.tokens.tokenAtRelativeIndex(1).type === _types.TokenType.parenL && + this.tokens.tokenAtRelativeIndex(-1).type !== _types.TokenType._new + ) { + this.tokens.replaceToken(`${replacement}.call(void 0, `); + // Remove the old paren. + this.tokens.removeToken(); + // Balance out the new paren. + this.rootTransformer.processBalancedCode(); + this.tokens.copyExpectedToken(_types.TokenType.parenR); + } else { + // See here: http://2ality.com/2015/12/references.html + this.tokens.replaceToken(`(0, ${replacement})`); + } + } else { + this.tokens.replaceToken(replacement); + } + return true; + } + + processObjectShorthand() { + const identifier = this.tokens.identifierName(); + const replacement = this.importProcessor.getIdentifierReplacement(identifier); + if (!replacement) { + return false; + } + this.tokens.replaceToken(`${identifier}: ${replacement}`); + return true; + } + + processExport() { + if ( + this.tokens.matches2(_types.TokenType._export, _types.TokenType._enum) || + this.tokens.matches3(_types.TokenType._export, _types.TokenType._const, _types.TokenType._enum) + ) { + this.hadNamedExport = true; + // Let the TypeScript transform handle it. + return false; + } + if (this.tokens.matches2(_types.TokenType._export, _types.TokenType._default)) { + if (this.tokens.matches3(_types.TokenType._export, _types.TokenType._default, _types.TokenType._enum)) { + this.hadDefaultExport = true; + // Flow export default enums need some special handling, so handle them + // in that tranform rather than this one. + return false; + } + this.processExportDefault(); + return true; + } else if (this.tokens.matches2(_types.TokenType._export, _types.TokenType.braceL)) { + this.processExportBindings(); + return true; + } else if ( + this.tokens.matches2(_types.TokenType._export, _types.TokenType.name) && + this.tokens.matchesContextualAtIndex(this.tokens.currentIndex() + 1, _keywords.ContextualKeyword._type) + ) { + // export type {a}; + // export type {a as b}; + // export type {a} from './b'; + // export type * from './b'; + // export type * as ns from './b'; + this.tokens.removeInitialToken(); + this.tokens.removeToken(); + if (this.tokens.matches1(_types.TokenType.braceL)) { + while (!this.tokens.matches1(_types.TokenType.braceR)) { + this.tokens.removeToken(); + } + this.tokens.removeToken(); + } else { + // * + this.tokens.removeToken(); + if (this.tokens.matches1(_types.TokenType._as)) { + // as + this.tokens.removeToken(); + // ns + this.tokens.removeToken(); + } + } + // Remove type re-export `... } from './T'` + if ( + this.tokens.matchesContextual(_keywords.ContextualKeyword._from) && + this.tokens.matches1AtIndex(this.tokens.currentIndex() + 1, _types.TokenType.string) + ) { + this.tokens.removeToken(); + this.tokens.removeToken(); + _removeMaybeImportAttributes.removeMaybeImportAttributes.call(void 0, this.tokens); + } + return true; + } + this.hadNamedExport = true; + if ( + this.tokens.matches2(_types.TokenType._export, _types.TokenType._var) || + this.tokens.matches2(_types.TokenType._export, _types.TokenType._let) || + this.tokens.matches2(_types.TokenType._export, _types.TokenType._const) + ) { + this.processExportVar(); + return true; + } else if ( + this.tokens.matches2(_types.TokenType._export, _types.TokenType._function) || + // export async function + this.tokens.matches3(_types.TokenType._export, _types.TokenType.name, _types.TokenType._function) + ) { + this.processExportFunction(); + return true; + } else if ( + this.tokens.matches2(_types.TokenType._export, _types.TokenType._class) || + this.tokens.matches3(_types.TokenType._export, _types.TokenType._abstract, _types.TokenType._class) || + this.tokens.matches2(_types.TokenType._export, _types.TokenType.at) + ) { + this.processExportClass(); + return true; + } else if (this.tokens.matches2(_types.TokenType._export, _types.TokenType.star)) { + this.processExportStar(); + return true; + } else { + throw new Error("Unrecognized export syntax."); + } + } + + processAssignment() { + const index = this.tokens.currentIndex(); + const identifierToken = this.tokens.tokens[index - 1]; + // If the LHS is a type identifier, this must be a declaration like `let a: b = c;`, + // with `b` as the identifier, so nothing needs to be done in that case. + if (identifierToken.isType || identifierToken.type !== _types.TokenType.name) { + return false; + } + if (identifierToken.shadowsGlobal) { + return false; + } + if (index >= 2 && this.tokens.matches1AtIndex(index - 2, _types.TokenType.dot)) { + return false; + } + if (index >= 2 && [_types.TokenType._var, _types.TokenType._let, _types.TokenType._const].includes(this.tokens.tokens[index - 2].type)) { + // Declarations don't need an extra assignment. This doesn't avoid the + // assignment for comma-separated declarations, but it's still correct + // since the assignment is just redundant. + return false; + } + const assignmentSnippet = this.importProcessor.resolveExportBinding( + this.tokens.identifierNameForToken(identifierToken), + ); + if (!assignmentSnippet) { + return false; + } + this.tokens.copyToken(); + this.tokens.appendCode(` ${assignmentSnippet} =`); + return true; + } + + /** + * Process something like `a += 3`, where `a` might be an exported value. + */ + processComplexAssignment() { + const index = this.tokens.currentIndex(); + const identifierToken = this.tokens.tokens[index - 1]; + if (identifierToken.type !== _types.TokenType.name) { + return false; + } + if (identifierToken.shadowsGlobal) { + return false; + } + if (index >= 2 && this.tokens.matches1AtIndex(index - 2, _types.TokenType.dot)) { + return false; + } + const assignmentSnippet = this.importProcessor.resolveExportBinding( + this.tokens.identifierNameForToken(identifierToken), + ); + if (!assignmentSnippet) { + return false; + } + this.tokens.appendCode(` = ${assignmentSnippet}`); + this.tokens.copyToken(); + return true; + } + + /** + * Process something like `++a`, where `a` might be an exported value. + */ + processPreIncDec() { + const index = this.tokens.currentIndex(); + const identifierToken = this.tokens.tokens[index + 1]; + if (identifierToken.type !== _types.TokenType.name) { + return false; + } + if (identifierToken.shadowsGlobal) { + return false; + } + // Ignore things like ++a.b and ++a[b] and ++a().b. + if ( + index + 2 < this.tokens.tokens.length && + (this.tokens.matches1AtIndex(index + 2, _types.TokenType.dot) || + this.tokens.matches1AtIndex(index + 2, _types.TokenType.bracketL) || + this.tokens.matches1AtIndex(index + 2, _types.TokenType.parenL)) + ) { + return false; + } + const identifierName = this.tokens.identifierNameForToken(identifierToken); + const assignmentSnippet = this.importProcessor.resolveExportBinding(identifierName); + if (!assignmentSnippet) { + return false; + } + this.tokens.appendCode(`${assignmentSnippet} = `); + this.tokens.copyToken(); + return true; + } + + /** + * Process something like `a++`, where `a` might be an exported value. + * This starts at the `a`, not at the `++`. + */ + processPostIncDec() { + const index = this.tokens.currentIndex(); + const identifierToken = this.tokens.tokens[index]; + const operatorToken = this.tokens.tokens[index + 1]; + if (identifierToken.type !== _types.TokenType.name) { + return false; + } + if (identifierToken.shadowsGlobal) { + return false; + } + if (index >= 1 && this.tokens.matches1AtIndex(index - 1, _types.TokenType.dot)) { + return false; + } + const identifierName = this.tokens.identifierNameForToken(identifierToken); + const assignmentSnippet = this.importProcessor.resolveExportBinding(identifierName); + if (!assignmentSnippet) { + return false; + } + const operatorCode = this.tokens.rawCodeForToken(operatorToken); + // We might also replace the identifier with something like exports.x, so + // do that replacement here as well. + const base = this.importProcessor.getIdentifierReplacement(identifierName) || identifierName; + if (operatorCode === "++") { + this.tokens.replaceToken(`(${base} = ${assignmentSnippet} = ${base} + 1, ${base} - 1)`); + } else if (operatorCode === "--") { + this.tokens.replaceToken(`(${base} = ${assignmentSnippet} = ${base} - 1, ${base} + 1)`); + } else { + throw new Error(`Unexpected operator: ${operatorCode}`); + } + this.tokens.removeToken(); + return true; + } + + processExportDefault() { + let exportedRuntimeValue = true; + if ( + this.tokens.matches4(_types.TokenType._export, _types.TokenType._default, _types.TokenType._function, _types.TokenType.name) || + // export default async function + (this.tokens.matches5(_types.TokenType._export, _types.TokenType._default, _types.TokenType.name, _types.TokenType._function, _types.TokenType.name) && + this.tokens.matchesContextualAtIndex( + this.tokens.currentIndex() + 2, + _keywords.ContextualKeyword._async, + )) + ) { + this.tokens.removeInitialToken(); + this.tokens.removeToken(); + // Named function export case: change it to a top-level function + // declaration followed by exports statement. + const name = this.processNamedFunction(); + this.tokens.appendCode(` exports.default = ${name};`); + } else if ( + this.tokens.matches4(_types.TokenType._export, _types.TokenType._default, _types.TokenType._class, _types.TokenType.name) || + this.tokens.matches5(_types.TokenType._export, _types.TokenType._default, _types.TokenType._abstract, _types.TokenType._class, _types.TokenType.name) || + this.tokens.matches3(_types.TokenType._export, _types.TokenType._default, _types.TokenType.at) + ) { + this.tokens.removeInitialToken(); + this.tokens.removeToken(); + this.copyDecorators(); + if (this.tokens.matches1(_types.TokenType._abstract)) { + this.tokens.removeToken(); + } + const name = this.rootTransformer.processNamedClass(); + this.tokens.appendCode(` exports.default = ${name};`); + // After this point, this is a plain "export default E" statement. + } else if ( + _shouldElideDefaultExport2.default.call(void 0, + this.isTypeScriptTransformEnabled, + this.keepUnusedImports, + this.tokens, + this.declarationInfo, + ) + ) { + // If the exported value is just an identifier and should be elided by TypeScript + // rules, then remove it entirely. It will always have the form `export default e`, + // where `e` is an identifier. + exportedRuntimeValue = false; + this.tokens.removeInitialToken(); + this.tokens.removeToken(); + this.tokens.removeToken(); + } else if (this.reactHotLoaderTransformer) { + // We need to assign E to a variable. Change "export default E" to + // "let _default; exports.default = _default = E" + const defaultVarName = this.nameManager.claimFreeName("_default"); + this.tokens.replaceToken(`let ${defaultVarName}; exports.`); + this.tokens.copyToken(); + this.tokens.appendCode(` = ${defaultVarName} =`); + this.reactHotLoaderTransformer.setExtractedDefaultExportName(defaultVarName); + } else { + // Change "export default E" to "exports.default = E" + this.tokens.replaceToken("exports."); + this.tokens.copyToken(); + this.tokens.appendCode(" ="); + } + if (exportedRuntimeValue) { + this.hadDefaultExport = true; + } + } + + copyDecorators() { + while (this.tokens.matches1(_types.TokenType.at)) { + this.tokens.copyToken(); + if (this.tokens.matches1(_types.TokenType.parenL)) { + this.tokens.copyExpectedToken(_types.TokenType.parenL); + this.rootTransformer.processBalancedCode(); + this.tokens.copyExpectedToken(_types.TokenType.parenR); + } else { + this.tokens.copyExpectedToken(_types.TokenType.name); + while (this.tokens.matches1(_types.TokenType.dot)) { + this.tokens.copyExpectedToken(_types.TokenType.dot); + this.tokens.copyExpectedToken(_types.TokenType.name); + } + if (this.tokens.matches1(_types.TokenType.parenL)) { + this.tokens.copyExpectedToken(_types.TokenType.parenL); + this.rootTransformer.processBalancedCode(); + this.tokens.copyExpectedToken(_types.TokenType.parenR); + } + } + } + } + + /** + * Transform a declaration like `export var`, `export let`, or `export const`. + */ + processExportVar() { + if (this.isSimpleExportVar()) { + this.processSimpleExportVar(); + } else { + this.processComplexExportVar(); + } + } + + /** + * Determine if the export is of the form: + * export var/let/const [varName] = [expr]; + * In other words, determine if function name inference might apply. + */ + isSimpleExportVar() { + let tokenIndex = this.tokens.currentIndex(); + // export + tokenIndex++; + // var/let/const + tokenIndex++; + if (!this.tokens.matches1AtIndex(tokenIndex, _types.TokenType.name)) { + return false; + } + tokenIndex++; + while (tokenIndex < this.tokens.tokens.length && this.tokens.tokens[tokenIndex].isType) { + tokenIndex++; + } + if (!this.tokens.matches1AtIndex(tokenIndex, _types.TokenType.eq)) { + return false; + } + return true; + } + + /** + * Transform an `export var` declaration initializing a single variable. + * + * For example, this: + * export const f = () => {}; + * becomes this: + * const f = () => {}; exports.f = f; + * + * The variable is unused (e.g. exports.f has the true value of the export). + * We need to produce an assignment of this form so that the function will + * have an inferred name of "f", which wouldn't happen in the more general + * case below. + */ + processSimpleExportVar() { + // export + this.tokens.removeInitialToken(); + // var/let/const + this.tokens.copyToken(); + const varName = this.tokens.identifierName(); + // x: number -> x + while (!this.tokens.matches1(_types.TokenType.eq)) { + this.rootTransformer.processToken(); + } + const endIndex = this.tokens.currentToken().rhsEndIndex; + if (endIndex == null) { + throw new Error("Expected = token with an end index."); + } + while (this.tokens.currentIndex() < endIndex) { + this.rootTransformer.processToken(); + } + this.tokens.appendCode(`; exports.${varName} = ${varName}`); + } + + /** + * Transform normal declaration exports, including handling destructuring. + * For example, this: + * export const {x: [a = 2, b], c} = d; + * becomes this: + * ({x: [exports.a = 2, exports.b], c: exports.c} = d;) + */ + processComplexExportVar() { + this.tokens.removeInitialToken(); + this.tokens.removeToken(); + const needsParens = this.tokens.matches1(_types.TokenType.braceL); + if (needsParens) { + this.tokens.appendCode("("); + } + + let depth = 0; + while (true) { + if ( + this.tokens.matches1(_types.TokenType.braceL) || + this.tokens.matches1(_types.TokenType.dollarBraceL) || + this.tokens.matches1(_types.TokenType.bracketL) + ) { + depth++; + this.tokens.copyToken(); + } else if (this.tokens.matches1(_types.TokenType.braceR) || this.tokens.matches1(_types.TokenType.bracketR)) { + depth--; + this.tokens.copyToken(); + } else if ( + depth === 0 && + !this.tokens.matches1(_types.TokenType.name) && + !this.tokens.currentToken().isType + ) { + break; + } else if (this.tokens.matches1(_types.TokenType.eq)) { + // Default values might have assignments in the RHS that we want to ignore, so skip past + // them. + const endIndex = this.tokens.currentToken().rhsEndIndex; + if (endIndex == null) { + throw new Error("Expected = token with an end index."); + } + while (this.tokens.currentIndex() < endIndex) { + this.rootTransformer.processToken(); + } + } else { + const token = this.tokens.currentToken(); + if (_tokenizer.isDeclaration.call(void 0, token)) { + const name = this.tokens.identifierName(); + let replacement = this.importProcessor.getIdentifierReplacement(name); + if (replacement === null) { + throw new Error(`Expected a replacement for ${name} in \`export var\` syntax.`); + } + if (_tokenizer.isObjectShorthandDeclaration.call(void 0, token)) { + replacement = `${name}: ${replacement}`; + } + this.tokens.replaceToken(replacement); + } else { + this.rootTransformer.processToken(); + } + } + } + + if (needsParens) { + // Seek to the end of the RHS. + const endIndex = this.tokens.currentToken().rhsEndIndex; + if (endIndex == null) { + throw new Error("Expected = token with an end index."); + } + while (this.tokens.currentIndex() < endIndex) { + this.rootTransformer.processToken(); + } + this.tokens.appendCode(")"); + } + } + + /** + * Transform this: + * export function foo() {} + * into this: + * function foo() {} exports.foo = foo; + */ + processExportFunction() { + this.tokens.replaceToken(""); + const name = this.processNamedFunction(); + this.tokens.appendCode(` exports.${name} = ${name};`); + } + + /** + * Skip past a function with a name and return that name. + */ + processNamedFunction() { + if (this.tokens.matches1(_types.TokenType._function)) { + this.tokens.copyToken(); + } else if (this.tokens.matches2(_types.TokenType.name, _types.TokenType._function)) { + if (!this.tokens.matchesContextual(_keywords.ContextualKeyword._async)) { + throw new Error("Expected async keyword in function export."); + } + this.tokens.copyToken(); + this.tokens.copyToken(); + } + if (this.tokens.matches1(_types.TokenType.star)) { + this.tokens.copyToken(); + } + if (!this.tokens.matches1(_types.TokenType.name)) { + throw new Error("Expected identifier for exported function name."); + } + const name = this.tokens.identifierName(); + this.tokens.copyToken(); + if (this.tokens.currentToken().isType) { + this.tokens.removeInitialToken(); + while (this.tokens.currentToken().isType) { + this.tokens.removeToken(); + } + } + this.tokens.copyExpectedToken(_types.TokenType.parenL); + this.rootTransformer.processBalancedCode(); + this.tokens.copyExpectedToken(_types.TokenType.parenR); + this.rootTransformer.processPossibleTypeRange(); + this.tokens.copyExpectedToken(_types.TokenType.braceL); + this.rootTransformer.processBalancedCode(); + this.tokens.copyExpectedToken(_types.TokenType.braceR); + return name; + } + + /** + * Transform this: + * export class A {} + * into this: + * class A {} exports.A = A; + */ + processExportClass() { + this.tokens.removeInitialToken(); + this.copyDecorators(); + if (this.tokens.matches1(_types.TokenType._abstract)) { + this.tokens.removeToken(); + } + const name = this.rootTransformer.processNamedClass(); + this.tokens.appendCode(` exports.${name} = ${name};`); + } + + /** + * Transform this: + * export {a, b as c}; + * into this: + * exports.a = a; exports.c = b; + * + * OR + * + * Transform this: + * export {a, b as c} from './foo'; + * into the pre-generated Object.defineProperty code from the ImportProcessor. + * + * For the first case, if the TypeScript transform is enabled, we need to skip + * exports that are only defined as types. + */ + processExportBindings() { + this.tokens.removeInitialToken(); + this.tokens.removeToken(); + + const isReExport = _isExportFrom2.default.call(void 0, this.tokens); + + const exportStatements = []; + while (true) { + if (this.tokens.matches1(_types.TokenType.braceR)) { + this.tokens.removeToken(); + break; + } + + const specifierInfo = _getImportExportSpecifierInfo2.default.call(void 0, this.tokens); + + while (this.tokens.currentIndex() < specifierInfo.endIndex) { + this.tokens.removeToken(); + } + + const shouldRemoveExport = + specifierInfo.isType || + (!isReExport && this.shouldElideExportedIdentifier(specifierInfo.leftName)); + if (!shouldRemoveExport) { + const exportedName = specifierInfo.rightName; + if (exportedName === "default") { + this.hadDefaultExport = true; + } else { + this.hadNamedExport = true; + } + const localName = specifierInfo.leftName; + const newLocalName = this.importProcessor.getIdentifierReplacement(localName); + exportStatements.push(`exports.${exportedName} = ${newLocalName || localName};`); + } + + if (this.tokens.matches1(_types.TokenType.braceR)) { + this.tokens.removeToken(); + break; + } + if (this.tokens.matches2(_types.TokenType.comma, _types.TokenType.braceR)) { + this.tokens.removeToken(); + this.tokens.removeToken(); + break; + } else if (this.tokens.matches1(_types.TokenType.comma)) { + this.tokens.removeToken(); + } else { + throw new Error(`Unexpected token: ${JSON.stringify(this.tokens.currentToken())}`); + } + } + + if (this.tokens.matchesContextual(_keywords.ContextualKeyword._from)) { + // This is an export...from, so throw away the normal named export code + // and use the Object.defineProperty code from ImportProcessor. + this.tokens.removeToken(); + const path = this.tokens.stringValue(); + this.tokens.replaceTokenTrimmingLeftWhitespace(this.importProcessor.claimImportCode(path)); + _removeMaybeImportAttributes.removeMaybeImportAttributes.call(void 0, this.tokens); + } else { + // This is a normal named export, so use that. + this.tokens.appendCode(exportStatements.join(" ")); + } + + if (this.tokens.matches1(_types.TokenType.semi)) { + this.tokens.removeToken(); + } + } + + processExportStar() { + this.tokens.removeInitialToken(); + while (!this.tokens.matches1(_types.TokenType.string)) { + this.tokens.removeToken(); + } + const path = this.tokens.stringValue(); + this.tokens.replaceTokenTrimmingLeftWhitespace(this.importProcessor.claimImportCode(path)); + _removeMaybeImportAttributes.removeMaybeImportAttributes.call(void 0, this.tokens); + if (this.tokens.matches1(_types.TokenType.semi)) { + this.tokens.removeToken(); + } + } + + shouldElideExportedIdentifier(name) { + return ( + this.isTypeScriptTransformEnabled && + !this.keepUnusedImports && + !this.declarationInfo.valueDeclarations.has(name) + ); + } +} exports.default = CJSImportTransformer; Index: frontend/node_modules/sucrase/dist/transformers/ESMImportTransformer.js =================================================================== --- frontend/node_modules/sucrase/dist/transformers/ESMImportTransformer.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/transformers/ESMImportTransformer.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,415 @@ +"use strict";Object.defineProperty(exports, "__esModule", {value: true}); function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; } + + +var _keywords = require('../parser/tokenizer/keywords'); +var _types = require('../parser/tokenizer/types'); + +var _elideImportEquals = require('../util/elideImportEquals'); var _elideImportEquals2 = _interopRequireDefault(_elideImportEquals); + + + +var _getDeclarationInfo = require('../util/getDeclarationInfo'); var _getDeclarationInfo2 = _interopRequireDefault(_getDeclarationInfo); +var _getImportExportSpecifierInfo = require('../util/getImportExportSpecifierInfo'); var _getImportExportSpecifierInfo2 = _interopRequireDefault(_getImportExportSpecifierInfo); +var _getNonTypeIdentifiers = require('../util/getNonTypeIdentifiers'); +var _isExportFrom = require('../util/isExportFrom'); var _isExportFrom2 = _interopRequireDefault(_isExportFrom); +var _removeMaybeImportAttributes = require('../util/removeMaybeImportAttributes'); +var _shouldElideDefaultExport = require('../util/shouldElideDefaultExport'); var _shouldElideDefaultExport2 = _interopRequireDefault(_shouldElideDefaultExport); + +var _Transformer = require('./Transformer'); var _Transformer2 = _interopRequireDefault(_Transformer); + +/** + * Class for editing import statements when we are keeping the code as ESM. We still need to remove + * type-only imports in TypeScript and Flow. + */ + class ESMImportTransformer extends _Transformer2.default { + + + + + constructor( + tokens, + nameManager, + helperManager, + reactHotLoaderTransformer, + isTypeScriptTransformEnabled, + isFlowTransformEnabled, + keepUnusedImports, + options, + ) { + super();this.tokens = tokens;this.nameManager = nameManager;this.helperManager = helperManager;this.reactHotLoaderTransformer = reactHotLoaderTransformer;this.isTypeScriptTransformEnabled = isTypeScriptTransformEnabled;this.isFlowTransformEnabled = isFlowTransformEnabled;this.keepUnusedImports = keepUnusedImports;; + this.nonTypeIdentifiers = + isTypeScriptTransformEnabled && !keepUnusedImports + ? _getNonTypeIdentifiers.getNonTypeIdentifiers.call(void 0, tokens, options) + : new Set(); + this.declarationInfo = + isTypeScriptTransformEnabled && !keepUnusedImports + ? _getDeclarationInfo2.default.call(void 0, tokens) + : _getDeclarationInfo.EMPTY_DECLARATION_INFO; + this.injectCreateRequireForImportRequire = Boolean(options.injectCreateRequireForImportRequire); + } + + process() { + // TypeScript `import foo = require('foo');` should always just be translated to plain require. + if (this.tokens.matches3(_types.TokenType._import, _types.TokenType.name, _types.TokenType.eq)) { + return this.processImportEquals(); + } + if ( + this.tokens.matches4(_types.TokenType._import, _types.TokenType.name, _types.TokenType.name, _types.TokenType.eq) && + this.tokens.matchesContextualAtIndex(this.tokens.currentIndex() + 1, _keywords.ContextualKeyword._type) + ) { + // import type T = require('T') + this.tokens.removeInitialToken(); + // This construct is always exactly 8 tokens long, so remove the 7 remaining tokens. + for (let i = 0; i < 7; i++) { + this.tokens.removeToken(); + } + return true; + } + if (this.tokens.matches2(_types.TokenType._export, _types.TokenType.eq)) { + this.tokens.replaceToken("module.exports"); + return true; + } + if ( + this.tokens.matches5(_types.TokenType._export, _types.TokenType._import, _types.TokenType.name, _types.TokenType.name, _types.TokenType.eq) && + this.tokens.matchesContextualAtIndex(this.tokens.currentIndex() + 2, _keywords.ContextualKeyword._type) + ) { + // export import type T = require('T') + this.tokens.removeInitialToken(); + // This construct is always exactly 9 tokens long, so remove the 8 remaining tokens. + for (let i = 0; i < 8; i++) { + this.tokens.removeToken(); + } + return true; + } + if (this.tokens.matches1(_types.TokenType._import)) { + return this.processImport(); + } + if (this.tokens.matches2(_types.TokenType._export, _types.TokenType._default)) { + return this.processExportDefault(); + } + if (this.tokens.matches2(_types.TokenType._export, _types.TokenType.braceL)) { + return this.processNamedExports(); + } + if ( + this.tokens.matches2(_types.TokenType._export, _types.TokenType.name) && + this.tokens.matchesContextualAtIndex(this.tokens.currentIndex() + 1, _keywords.ContextualKeyword._type) + ) { + // export type {a}; + // export type {a as b}; + // export type {a} from './b'; + // export type * from './b'; + // export type * as ns from './b'; + this.tokens.removeInitialToken(); + this.tokens.removeToken(); + if (this.tokens.matches1(_types.TokenType.braceL)) { + while (!this.tokens.matches1(_types.TokenType.braceR)) { + this.tokens.removeToken(); + } + this.tokens.removeToken(); + } else { + // * + this.tokens.removeToken(); + if (this.tokens.matches1(_types.TokenType._as)) { + // as + this.tokens.removeToken(); + // ns + this.tokens.removeToken(); + } + } + // Remove type re-export `... } from './T'` + if ( + this.tokens.matchesContextual(_keywords.ContextualKeyword._from) && + this.tokens.matches1AtIndex(this.tokens.currentIndex() + 1, _types.TokenType.string) + ) { + this.tokens.removeToken(); + this.tokens.removeToken(); + _removeMaybeImportAttributes.removeMaybeImportAttributes.call(void 0, this.tokens); + } + return true; + } + return false; + } + + processImportEquals() { + const importName = this.tokens.identifierNameAtIndex(this.tokens.currentIndex() + 1); + if (this.shouldAutomaticallyElideImportedName(importName)) { + // If this name is only used as a type, elide the whole import. + _elideImportEquals2.default.call(void 0, this.tokens); + } else if (this.injectCreateRequireForImportRequire) { + // We're using require in an environment (Node ESM) that doesn't provide + // it as a global, so generate a helper to import it. + // import -> const + this.tokens.replaceToken("const"); + // Foo + this.tokens.copyToken(); + // = + this.tokens.copyToken(); + // require + this.tokens.replaceToken(this.helperManager.getHelperName("require")); + } else { + // Otherwise, just switch `import` to `const`. + this.tokens.replaceToken("const"); + } + return true; + } + + processImport() { + if (this.tokens.matches2(_types.TokenType._import, _types.TokenType.parenL)) { + // Dynamic imports don't need to be transformed. + return false; + } + + const snapshot = this.tokens.snapshot(); + const allImportsRemoved = this.removeImportTypeBindings(); + if (allImportsRemoved) { + this.tokens.restoreToSnapshot(snapshot); + while (!this.tokens.matches1(_types.TokenType.string)) { + this.tokens.removeToken(); + } + this.tokens.removeToken(); + _removeMaybeImportAttributes.removeMaybeImportAttributes.call(void 0, this.tokens); + if (this.tokens.matches1(_types.TokenType.semi)) { + this.tokens.removeToken(); + } + } + return true; + } + + /** + * Remove type bindings from this import, leaving the rest of the import intact. + * + * Return true if this import was ONLY types, and thus is eligible for removal. This will bail out + * of the replacement operation, so we can return early here. + */ + removeImportTypeBindings() { + this.tokens.copyExpectedToken(_types.TokenType._import); + if ( + this.tokens.matchesContextual(_keywords.ContextualKeyword._type) && + !this.tokens.matches1AtIndex(this.tokens.currentIndex() + 1, _types.TokenType.comma) && + !this.tokens.matchesContextualAtIndex(this.tokens.currentIndex() + 1, _keywords.ContextualKeyword._from) + ) { + // This is an "import type" statement, so exit early. + return true; + } + + if (this.tokens.matches1(_types.TokenType.string)) { + // This is a bare import, so we should proceed with the import. + this.tokens.copyToken(); + return false; + } + + // Skip the "module" token in import reflection. + if ( + this.tokens.matchesContextual(_keywords.ContextualKeyword._module) && + this.tokens.matchesContextualAtIndex(this.tokens.currentIndex() + 2, _keywords.ContextualKeyword._from) + ) { + this.tokens.copyToken(); + } + + let foundNonTypeImport = false; + let foundAnyNamedImport = false; + let needsComma = false; + + // Handle default import. + if (this.tokens.matches1(_types.TokenType.name)) { + if (this.shouldAutomaticallyElideImportedName(this.tokens.identifierName())) { + this.tokens.removeToken(); + if (this.tokens.matches1(_types.TokenType.comma)) { + this.tokens.removeToken(); + } + } else { + foundNonTypeImport = true; + this.tokens.copyToken(); + if (this.tokens.matches1(_types.TokenType.comma)) { + // We're in a statement like: + // import A, * as B from './A'; + // or + // import A, {foo} from './A'; + // where the `A` is being kept. The comma should be removed if an only + // if the next part of the import statement is elided, but that's hard + // to determine at this point in the code. Instead, always remove it + // and set a flag to add it back if necessary. + needsComma = true; + this.tokens.removeToken(); + } + } + } + + if (this.tokens.matches1(_types.TokenType.star)) { + if (this.shouldAutomaticallyElideImportedName(this.tokens.identifierNameAtRelativeIndex(2))) { + this.tokens.removeToken(); + this.tokens.removeToken(); + this.tokens.removeToken(); + } else { + if (needsComma) { + this.tokens.appendCode(","); + } + foundNonTypeImport = true; + this.tokens.copyExpectedToken(_types.TokenType.star); + this.tokens.copyExpectedToken(_types.TokenType.name); + this.tokens.copyExpectedToken(_types.TokenType.name); + } + } else if (this.tokens.matches1(_types.TokenType.braceL)) { + if (needsComma) { + this.tokens.appendCode(","); + } + this.tokens.copyToken(); + while (!this.tokens.matches1(_types.TokenType.braceR)) { + foundAnyNamedImport = true; + const specifierInfo = _getImportExportSpecifierInfo2.default.call(void 0, this.tokens); + if ( + specifierInfo.isType || + this.shouldAutomaticallyElideImportedName(specifierInfo.rightName) + ) { + while (this.tokens.currentIndex() < specifierInfo.endIndex) { + this.tokens.removeToken(); + } + if (this.tokens.matches1(_types.TokenType.comma)) { + this.tokens.removeToken(); + } + } else { + foundNonTypeImport = true; + while (this.tokens.currentIndex() < specifierInfo.endIndex) { + this.tokens.copyToken(); + } + if (this.tokens.matches1(_types.TokenType.comma)) { + this.tokens.copyToken(); + } + } + } + this.tokens.copyExpectedToken(_types.TokenType.braceR); + } + + if (this.keepUnusedImports) { + return false; + } + if (this.isTypeScriptTransformEnabled) { + return !foundNonTypeImport; + } else if (this.isFlowTransformEnabled) { + // In Flow, unlike TS, `import {} from 'foo';` preserves the import. + return foundAnyNamedImport && !foundNonTypeImport; + } else { + return false; + } + } + + shouldAutomaticallyElideImportedName(name) { + return ( + this.isTypeScriptTransformEnabled && + !this.keepUnusedImports && + !this.nonTypeIdentifiers.has(name) + ); + } + + processExportDefault() { + if ( + _shouldElideDefaultExport2.default.call(void 0, + this.isTypeScriptTransformEnabled, + this.keepUnusedImports, + this.tokens, + this.declarationInfo, + ) + ) { + // If the exported value is just an identifier and should be elided by TypeScript + // rules, then remove it entirely. It will always have the form `export default e`, + // where `e` is an identifier. + this.tokens.removeInitialToken(); + this.tokens.removeToken(); + this.tokens.removeToken(); + return true; + } + + const alreadyHasName = + this.tokens.matches4(_types.TokenType._export, _types.TokenType._default, _types.TokenType._function, _types.TokenType.name) || + // export default async function + (this.tokens.matches5(_types.TokenType._export, _types.TokenType._default, _types.TokenType.name, _types.TokenType._function, _types.TokenType.name) && + this.tokens.matchesContextualAtIndex( + this.tokens.currentIndex() + 2, + _keywords.ContextualKeyword._async, + )) || + this.tokens.matches4(_types.TokenType._export, _types.TokenType._default, _types.TokenType._class, _types.TokenType.name) || + this.tokens.matches5(_types.TokenType._export, _types.TokenType._default, _types.TokenType._abstract, _types.TokenType._class, _types.TokenType.name); + + if (!alreadyHasName && this.reactHotLoaderTransformer) { + // This is a plain "export default E" statement and we need to assign E to a variable. + // Change "export default E" to "let _default; export default _default = E" + const defaultVarName = this.nameManager.claimFreeName("_default"); + this.tokens.replaceToken(`let ${defaultVarName}; export`); + this.tokens.copyToken(); + this.tokens.appendCode(` ${defaultVarName} =`); + this.reactHotLoaderTransformer.setExtractedDefaultExportName(defaultVarName); + return true; + } + return false; + } + + /** + * Handle a statement with one of these forms: + * export {a, type b}; + * export {c, type d} from 'foo'; + * + * In both cases, any explicit type exports should be removed. In the first + * case, we also need to handle implicit export elision for names declared as + * types. In the second case, we must NOT do implicit named export elision, + * but we must remove the runtime import if all exports are type exports. + */ + processNamedExports() { + if (!this.isTypeScriptTransformEnabled) { + return false; + } + this.tokens.copyExpectedToken(_types.TokenType._export); + this.tokens.copyExpectedToken(_types.TokenType.braceL); + + const isReExport = _isExportFrom2.default.call(void 0, this.tokens); + let foundNonTypeExport = false; + while (!this.tokens.matches1(_types.TokenType.braceR)) { + const specifierInfo = _getImportExportSpecifierInfo2.default.call(void 0, this.tokens); + if ( + specifierInfo.isType || + (!isReExport && this.shouldElideExportedName(specifierInfo.leftName)) + ) { + // Type export, so remove all tokens, including any comma. + while (this.tokens.currentIndex() < specifierInfo.endIndex) { + this.tokens.removeToken(); + } + if (this.tokens.matches1(_types.TokenType.comma)) { + this.tokens.removeToken(); + } + } else { + // Non-type export, so copy all tokens, including any comma. + foundNonTypeExport = true; + while (this.tokens.currentIndex() < specifierInfo.endIndex) { + this.tokens.copyToken(); + } + if (this.tokens.matches1(_types.TokenType.comma)) { + this.tokens.copyToken(); + } + } + } + this.tokens.copyExpectedToken(_types.TokenType.braceR); + + if (!this.keepUnusedImports && isReExport && !foundNonTypeExport) { + // This is a type-only re-export, so skip evaluating the other module. Technically this + // leaves the statement as `export {}`, but that's ok since that's a no-op. + this.tokens.removeToken(); + this.tokens.removeToken(); + _removeMaybeImportAttributes.removeMaybeImportAttributes.call(void 0, this.tokens); + } + + return true; + } + + /** + * ESM elides all imports with the rule that we only elide if we see that it's + * a type and never see it as a value. This is in contrast to CJS, which + * elides imports that are completely unknown. + */ + shouldElideExportedName(name) { + return ( + this.isTypeScriptTransformEnabled && + !this.keepUnusedImports && + this.declarationInfo.typeDeclarations.has(name) && + !this.declarationInfo.valueDeclarations.has(name) + ); + } +} exports.default = ESMImportTransformer; Index: frontend/node_modules/sucrase/dist/transformers/FlowTransformer.js =================================================================== --- frontend/node_modules/sucrase/dist/transformers/FlowTransformer.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/transformers/FlowTransformer.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,182 @@ +"use strict";Object.defineProperty(exports, "__esModule", {value: true}); function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }var _keywords = require('../parser/tokenizer/keywords'); +var _types = require('../parser/tokenizer/types'); + + +var _Transformer = require('./Transformer'); var _Transformer2 = _interopRequireDefault(_Transformer); + + class FlowTransformer extends _Transformer2.default { + constructor( + rootTransformer, + tokens, + isImportsTransformEnabled, + ) { + super();this.rootTransformer = rootTransformer;this.tokens = tokens;this.isImportsTransformEnabled = isImportsTransformEnabled;; + } + + process() { + if ( + this.rootTransformer.processPossibleArrowParamEnd() || + this.rootTransformer.processPossibleAsyncArrowWithTypeParams() || + this.rootTransformer.processPossibleTypeRange() + ) { + return true; + } + if (this.tokens.matches1(_types.TokenType._enum)) { + this.processEnum(); + return true; + } + if (this.tokens.matches2(_types.TokenType._export, _types.TokenType._enum)) { + this.processNamedExportEnum(); + return true; + } + if (this.tokens.matches3(_types.TokenType._export, _types.TokenType._default, _types.TokenType._enum)) { + this.processDefaultExportEnum(); + return true; + } + return false; + } + + /** + * Handle a declaration like: + * export enum E ... + * + * With this imports transform, this becomes: + * const E = [[enum]]; exports.E = E; + * + * otherwise, it becomes: + * export const E = [[enum]]; + */ + processNamedExportEnum() { + if (this.isImportsTransformEnabled) { + // export + this.tokens.removeInitialToken(); + const enumName = this.tokens.identifierNameAtRelativeIndex(1); + this.processEnum(); + this.tokens.appendCode(` exports.${enumName} = ${enumName};`); + } else { + this.tokens.copyToken(); + this.processEnum(); + } + } + + /** + * Handle a declaration like: + * export default enum E + * + * With the imports transform, this becomes: + * const E = [[enum]]; exports.default = E; + * + * otherwise, it becomes: + * const E = [[enum]]; export default E; + */ + processDefaultExportEnum() { + // export + this.tokens.removeInitialToken(); + // default + this.tokens.removeToken(); + const enumName = this.tokens.identifierNameAtRelativeIndex(1); + this.processEnum(); + if (this.isImportsTransformEnabled) { + this.tokens.appendCode(` exports.default = ${enumName};`); + } else { + this.tokens.appendCode(` export default ${enumName};`); + } + } + + /** + * Transpile flow enums to invoke the "flow-enums-runtime" library. + * + * Currently, the transpiled code always uses `require("flow-enums-runtime")`, + * but if future flexibility is needed, we could expose a config option for + * this string (similar to configurable JSX). Even when targeting ESM, the + * default behavior of babel-plugin-transform-flow-enums is to use require + * rather than injecting an import. + * + * Flow enums are quite a bit simpler than TS enums and have some convenient + * constraints: + * - Element initializers must be either always present or always absent. That + * means that we can use fixed lookahead on the first element (if any) and + * assume that all elements are like that. + * - The right-hand side of an element initializer must be a literal value, + * not a complex expression and not referencing other elements. That means + * we can simply copy a single token. + * + * Enums can be broken up into three basic cases: + * + * Mirrored enums: + * enum E {A, B} + * -> + * const E = require("flow-enums-runtime").Mirrored(["A", "B"]); + * + * Initializer enums: + * enum E {A = 1, B = 2} + * -> + * const E = require("flow-enums-runtime")({A: 1, B: 2}); + * + * Symbol enums: + * enum E of symbol {A, B} + * -> + * const E = require("flow-enums-runtime")({A: Symbol("A"), B: Symbol("B")}); + * + * We can statically detect which of the three cases this is by looking at the + * "of" declaration (if any) and seeing if the first element has an initializer. + * Since the other transform details are so similar between the three cases, we + * use a single implementation and vary the transform within processEnumElement + * based on case. + */ + processEnum() { + // enum E -> const E + this.tokens.replaceToken("const"); + this.tokens.copyExpectedToken(_types.TokenType.name); + + let isSymbolEnum = false; + if (this.tokens.matchesContextual(_keywords.ContextualKeyword._of)) { + this.tokens.removeToken(); + isSymbolEnum = this.tokens.matchesContextual(_keywords.ContextualKeyword._symbol); + this.tokens.removeToken(); + } + const hasInitializers = this.tokens.matches3(_types.TokenType.braceL, _types.TokenType.name, _types.TokenType.eq); + this.tokens.appendCode(' = require("flow-enums-runtime")'); + + const isMirrored = !isSymbolEnum && !hasInitializers; + this.tokens.replaceTokenTrimmingLeftWhitespace(isMirrored ? ".Mirrored([" : "({"); + + while (!this.tokens.matches1(_types.TokenType.braceR)) { + // ... is allowed at the end and has no runtime behavior. + if (this.tokens.matches1(_types.TokenType.ellipsis)) { + this.tokens.removeToken(); + break; + } + this.processEnumElement(isSymbolEnum, hasInitializers); + if (this.tokens.matches1(_types.TokenType.comma)) { + this.tokens.copyToken(); + } + } + + this.tokens.replaceToken(isMirrored ? "]);" : "});"); + } + + /** + * Process an individual enum element, producing either an array element or an + * object element based on what type of enum this is. + */ + processEnumElement(isSymbolEnum, hasInitializers) { + if (isSymbolEnum) { + // Symbol enums never have initializers and are expanded to object elements. + // A, -> A: Symbol("A"), + const elementName = this.tokens.identifierName(); + this.tokens.copyToken(); + this.tokens.appendCode(`: Symbol("${elementName}")`); + } else if (hasInitializers) { + // Initializers are expanded to object elements. + // A = 1, -> A: 1, + this.tokens.copyToken(); + this.tokens.replaceTokenTrimmingLeftWhitespace(":"); + this.tokens.copyToken(); + } else { + // Enum elements without initializers become string literal array elements. + // A, -> "A", + this.tokens.replaceToken(`"${this.tokens.identifierName()}"`); + } + } +} exports.default = FlowTransformer; Index: frontend/node_modules/sucrase/dist/transformers/JSXTransformer.js =================================================================== --- frontend/node_modules/sucrase/dist/transformers/JSXTransformer.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/transformers/JSXTransformer.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,733 @@ +"use strict";Object.defineProperty(exports, "__esModule", {value: true}); function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; } + + +var _xhtml = require('../parser/plugins/jsx/xhtml'); var _xhtml2 = _interopRequireDefault(_xhtml); +var _tokenizer = require('../parser/tokenizer'); +var _types = require('../parser/tokenizer/types'); +var _charcodes = require('../parser/util/charcodes'); + +var _getJSXPragmaInfo = require('../util/getJSXPragmaInfo'); var _getJSXPragmaInfo2 = _interopRequireDefault(_getJSXPragmaInfo); + +var _Transformer = require('./Transformer'); var _Transformer2 = _interopRequireDefault(_Transformer); + + class JSXTransformer extends _Transformer2.default { + + + + + // State for calculating the line number of each JSX tag in development. + __init() {this.lastLineNumber = 1} + __init2() {this.lastIndex = 0} + + // In development, variable name holding the name of the current file. + __init3() {this.filenameVarName = null} + // Mapping of claimed names for imports in the automatic transform, e,g. + // {jsx: "_jsx"}. This determines which imports to generate in the prefix. + __init4() {this.esmAutomaticImportNameResolutions = {}} + // When automatically adding imports in CJS mode, we store the variable name + // holding the imported CJS module so we can require it in the prefix. + __init5() {this.cjsAutomaticModuleNameResolutions = {}} + + constructor( + rootTransformer, + tokens, + importProcessor, + nameManager, + options, + ) { + super();this.rootTransformer = rootTransformer;this.tokens = tokens;this.importProcessor = importProcessor;this.nameManager = nameManager;this.options = options;JSXTransformer.prototype.__init.call(this);JSXTransformer.prototype.__init2.call(this);JSXTransformer.prototype.__init3.call(this);JSXTransformer.prototype.__init4.call(this);JSXTransformer.prototype.__init5.call(this);; + this.jsxPragmaInfo = _getJSXPragmaInfo2.default.call(void 0, options); + this.isAutomaticRuntime = options.jsxRuntime === "automatic"; + this.jsxImportSource = options.jsxImportSource || "react"; + } + + process() { + if (this.tokens.matches1(_types.TokenType.jsxTagStart)) { + this.processJSXTag(); + return true; + } + return false; + } + + getPrefixCode() { + let prefix = ""; + if (this.filenameVarName) { + prefix += `const ${this.filenameVarName} = ${JSON.stringify(this.options.filePath || "")};`; + } + if (this.isAutomaticRuntime) { + if (this.importProcessor) { + // CJS mode: emit require statements for all modules that were referenced. + for (const [path, resolvedName] of Object.entries(this.cjsAutomaticModuleNameResolutions)) { + prefix += `var ${resolvedName} = require("${path}");`; + } + } else { + // ESM mode: consolidate and emit import statements for referenced names. + const {createElement: createElementResolution, ...otherResolutions} = + this.esmAutomaticImportNameResolutions; + if (createElementResolution) { + prefix += `import {createElement as ${createElementResolution}} from "${this.jsxImportSource}";`; + } + const importSpecifiers = Object.entries(otherResolutions) + .map(([name, resolvedName]) => `${name} as ${resolvedName}`) + .join(", "); + if (importSpecifiers) { + const importPath = + this.jsxImportSource + (this.options.production ? "/jsx-runtime" : "/jsx-dev-runtime"); + prefix += `import {${importSpecifiers}} from "${importPath}";`; + } + } + } + return prefix; + } + + processJSXTag() { + const {jsxRole, start} = this.tokens.currentToken(); + // Calculate line number information at the very start (if in development + // mode) so that the information is guaranteed to be queried in token order. + const elementLocationCode = this.options.production ? null : this.getElementLocationCode(start); + if (this.isAutomaticRuntime && jsxRole !== _tokenizer.JSXRole.KeyAfterPropSpread) { + this.transformTagToJSXFunc(elementLocationCode, jsxRole); + } else { + this.transformTagToCreateElement(elementLocationCode); + } + } + + getElementLocationCode(firstTokenStart) { + const lineNumber = this.getLineNumberForIndex(firstTokenStart); + return `lineNumber: ${lineNumber}`; + } + + /** + * Get the line number for this source position. This is calculated lazily and + * must be called in increasing order by index. + */ + getLineNumberForIndex(index) { + const code = this.tokens.code; + while (this.lastIndex < index && this.lastIndex < code.length) { + if (code[this.lastIndex] === "\n") { + this.lastLineNumber++; + } + this.lastIndex++; + } + return this.lastLineNumber; + } + + /** + * Convert the current JSX element to a call to jsx, jsxs, or jsxDEV. This is + * the primary transformation for the automatic transform. + * + * Example: + *
Hello{x}
+ * becomes + * jsxs('div', {a: 1, children: ["Hello", x]}, 2) + */ + transformTagToJSXFunc(elementLocationCode, jsxRole) { + const isStatic = jsxRole === _tokenizer.JSXRole.StaticChildren; + // First tag is always jsxTagStart. + this.tokens.replaceToken(this.getJSXFuncInvocationCode(isStatic)); + + let keyCode = null; + if (this.tokens.matches1(_types.TokenType.jsxTagEnd)) { + // Fragment syntax. + this.tokens.replaceToken(`${this.getFragmentCode()}, {`); + this.processAutomaticChildrenAndEndProps(jsxRole); + } else { + // Normal open tag or self-closing tag. + this.processTagIntro(); + this.tokens.appendCode(", {"); + keyCode = this.processProps(true); + + if (this.tokens.matches2(_types.TokenType.slash, _types.TokenType.jsxTagEnd)) { + // Self-closing tag, no children to add, so close the props. + this.tokens.appendCode("}"); + } else if (this.tokens.matches1(_types.TokenType.jsxTagEnd)) { + // Tag with children. + this.tokens.removeToken(); + this.processAutomaticChildrenAndEndProps(jsxRole); + } else { + throw new Error("Expected either /> or > at the end of the tag."); + } + // If a key was present, move it to its own arg. Note that moving code + // like this will cause line numbers to get out of sync within the JSX + // element if the key expression has a newline in it. This is unfortunate, + // but hopefully should be rare. + if (keyCode) { + this.tokens.appendCode(`, ${keyCode}`); + } + } + if (!this.options.production) { + // If the key wasn't already added, add it now so we can correctly set + // positional args for jsxDEV. + if (keyCode === null) { + this.tokens.appendCode(", void 0"); + } + this.tokens.appendCode(`, ${isStatic}, ${this.getDevSource(elementLocationCode)}, this`); + } + // We're at the close-tag or the end of a self-closing tag, so remove + // everything else and close the function call. + this.tokens.removeInitialToken(); + while (!this.tokens.matches1(_types.TokenType.jsxTagEnd)) { + this.tokens.removeToken(); + } + this.tokens.replaceToken(")"); + } + + /** + * Convert the current JSX element to a createElement call. In the classic + * runtime, this is the only case. In the automatic runtime, this is called + * as a fallback in some situations. + * + * Example: + *
Hello{x}
+ * becomes + * React.createElement('div', {a: 1, key: 2}, "Hello", x) + */ + transformTagToCreateElement(elementLocationCode) { + // First tag is always jsxTagStart. + this.tokens.replaceToken(this.getCreateElementInvocationCode()); + + if (this.tokens.matches1(_types.TokenType.jsxTagEnd)) { + // Fragment syntax. + this.tokens.replaceToken(`${this.getFragmentCode()}, null`); + this.processChildren(true); + } else { + // Normal open tag or self-closing tag. + this.processTagIntro(); + this.processPropsObjectWithDevInfo(elementLocationCode); + + if (this.tokens.matches2(_types.TokenType.slash, _types.TokenType.jsxTagEnd)) { + // Self-closing tag; no children to process. + } else if (this.tokens.matches1(_types.TokenType.jsxTagEnd)) { + // Tag with children and a close-tag; process the children as args. + this.tokens.removeToken(); + this.processChildren(true); + } else { + throw new Error("Expected either /> or > at the end of the tag."); + } + } + // We're at the close-tag or the end of a self-closing tag, so remove + // everything else and close the function call. + this.tokens.removeInitialToken(); + while (!this.tokens.matches1(_types.TokenType.jsxTagEnd)) { + this.tokens.removeToken(); + } + this.tokens.replaceToken(")"); + } + + /** + * Get the code for the relevant function for this context: jsx, jsxs, + * or jsxDEV. The following open-paren is included as well. + * + * These functions are only used for the automatic runtime, so they are always + * auto-imported, but the auto-import will be either CJS or ESM based on the + * target module format. + */ + getJSXFuncInvocationCode(isStatic) { + if (this.options.production) { + if (isStatic) { + return this.claimAutoImportedFuncInvocation("jsxs", "/jsx-runtime"); + } else { + return this.claimAutoImportedFuncInvocation("jsx", "/jsx-runtime"); + } + } else { + return this.claimAutoImportedFuncInvocation("jsxDEV", "/jsx-dev-runtime"); + } + } + + /** + * Return the code to use for the createElement function, e.g. + * `React.createElement`, including the following open-paren. + * + * This is the main function to use for the classic runtime. For the + * automatic runtime, this function is used as a fallback function to + * preserve behavior when there is a prop spread followed by an explicit + * key. In that automatic runtime case, the function should be automatically + * imported. + */ + getCreateElementInvocationCode() { + if (this.isAutomaticRuntime) { + return this.claimAutoImportedFuncInvocation("createElement", ""); + } else { + const {jsxPragmaInfo} = this; + const resolvedPragmaBaseName = this.importProcessor + ? this.importProcessor.getIdentifierReplacement(jsxPragmaInfo.base) || jsxPragmaInfo.base + : jsxPragmaInfo.base; + return `${resolvedPragmaBaseName}${jsxPragmaInfo.suffix}(`; + } + } + + /** + * Return the code to use as the component when compiling a shorthand + * fragment, e.g. `React.Fragment`. + * + * This may be called from either the classic or automatic runtime, and + * the value should be auto-imported for the automatic runtime. + */ + getFragmentCode() { + if (this.isAutomaticRuntime) { + return this.claimAutoImportedName( + "Fragment", + this.options.production ? "/jsx-runtime" : "/jsx-dev-runtime", + ); + } else { + const {jsxPragmaInfo} = this; + const resolvedFragmentPragmaBaseName = this.importProcessor + ? this.importProcessor.getIdentifierReplacement(jsxPragmaInfo.fragmentBase) || + jsxPragmaInfo.fragmentBase + : jsxPragmaInfo.fragmentBase; + return resolvedFragmentPragmaBaseName + jsxPragmaInfo.fragmentSuffix; + } + } + + /** + * Return code that invokes the given function. + * + * When the imports transform is enabled, use the CJSImportTransformer + * strategy of using `.call(void 0, ...` to avoid passing a `this` value in a + * situation that would otherwise look like a method call. + */ + claimAutoImportedFuncInvocation(funcName, importPathSuffix) { + const funcCode = this.claimAutoImportedName(funcName, importPathSuffix); + if (this.importProcessor) { + return `${funcCode}.call(void 0, `; + } else { + return `${funcCode}(`; + } + } + + claimAutoImportedName(funcName, importPathSuffix) { + if (this.importProcessor) { + // CJS mode: claim a name for the module and mark it for import. + const path = this.jsxImportSource + importPathSuffix; + if (!this.cjsAutomaticModuleNameResolutions[path]) { + this.cjsAutomaticModuleNameResolutions[path] = + this.importProcessor.getFreeIdentifierForPath(path); + } + return `${this.cjsAutomaticModuleNameResolutions[path]}.${funcName}`; + } else { + // ESM mode: claim a name for this function and add it to the names that + // should be auto-imported when the prefix is generated. + if (!this.esmAutomaticImportNameResolutions[funcName]) { + this.esmAutomaticImportNameResolutions[funcName] = this.nameManager.claimFreeName( + `_${funcName}`, + ); + } + return this.esmAutomaticImportNameResolutions[funcName]; + } + } + + /** + * Process the first part of a tag, before any props. + */ + processTagIntro() { + // Walk forward until we see one of these patterns: + // jsxName to start the first prop, preceded by another jsxName to end the tag name. + // jsxName to start the first prop, preceded by greaterThan to end the type argument. + // [open brace] to start the first prop. + // [jsxTagEnd] to end the open-tag. + // [slash, jsxTagEnd] to end the self-closing tag. + let introEnd = this.tokens.currentIndex() + 1; + while ( + this.tokens.tokens[introEnd].isType || + (!this.tokens.matches2AtIndex(introEnd - 1, _types.TokenType.jsxName, _types.TokenType.jsxName) && + !this.tokens.matches2AtIndex(introEnd - 1, _types.TokenType.greaterThan, _types.TokenType.jsxName) && + !this.tokens.matches1AtIndex(introEnd, _types.TokenType.braceL) && + !this.tokens.matches1AtIndex(introEnd, _types.TokenType.jsxTagEnd) && + !this.tokens.matches2AtIndex(introEnd, _types.TokenType.slash, _types.TokenType.jsxTagEnd)) + ) { + introEnd++; + } + if (introEnd === this.tokens.currentIndex() + 1) { + const tagName = this.tokens.identifierName(); + if (startsWithLowerCase(tagName)) { + this.tokens.replaceToken(`'${tagName}'`); + } + } + while (this.tokens.currentIndex() < introEnd) { + this.rootTransformer.processToken(); + } + } + + /** + * Starting at the beginning of the props, add the props argument to + * React.createElement, including the comma before it. + */ + processPropsObjectWithDevInfo(elementLocationCode) { + const devProps = this.options.production + ? "" + : `__self: this, __source: ${this.getDevSource(elementLocationCode)}`; + if (!this.tokens.matches1(_types.TokenType.jsxName) && !this.tokens.matches1(_types.TokenType.braceL)) { + if (devProps) { + this.tokens.appendCode(`, {${devProps}}`); + } else { + this.tokens.appendCode(`, null`); + } + return; + } + this.tokens.appendCode(`, {`); + this.processProps(false); + if (devProps) { + this.tokens.appendCode(` ${devProps}}`); + } else { + this.tokens.appendCode("}"); + } + } + + /** + * Transform the core part of the props, assuming that a { has already been + * inserted before us and that a } will be inserted after us. + * + * If extractKeyCode is true (i.e. when using any jsx... function), any prop + * named "key" has its code captured and returned rather than being emitted to + * the output code. This shifts line numbers, and emitting the code later will + * correct line numbers again. If no key is found or if extractKeyCode is + * false, this function returns null. + */ + processProps(extractKeyCode) { + let keyCode = null; + while (true) { + if (this.tokens.matches2(_types.TokenType.jsxName, _types.TokenType.eq)) { + // This is a regular key={value} or key="value" prop. + const propName = this.tokens.identifierName(); + if (extractKeyCode && propName === "key") { + if (keyCode !== null) { + // The props list has multiple keys. Different implementations are + // inconsistent about what to do here: as of this writing, Babel and + // swc keep the *last* key and completely remove the rest, while + // TypeScript uses the *first* key and leaves the others as regular + // props. The React team collaborated with Babel on the + // implementation of this behavior, so presumably the Babel behavior + // is the one to use. + // Since we won't ever be emitting the previous key code, we need to + // at least emit its newlines here so that the line numbers match up + // in the long run. + this.tokens.appendCode(keyCode.replace(/[^\n]/g, "")); + } + // key + this.tokens.removeToken(); + // = + this.tokens.removeToken(); + const snapshot = this.tokens.snapshot(); + this.processPropValue(); + keyCode = this.tokens.dangerouslyGetAndRemoveCodeSinceSnapshot(snapshot); + // Don't add a comma + continue; + } else { + this.processPropName(propName); + this.tokens.replaceToken(": "); + this.processPropValue(); + } + } else if (this.tokens.matches1(_types.TokenType.jsxName)) { + // This is a shorthand prop like . + const propName = this.tokens.identifierName(); + this.processPropName(propName); + this.tokens.appendCode(": true"); + } else if (this.tokens.matches1(_types.TokenType.braceL)) { + // This is prop spread, like
, which we can pass + // through fairly directly as an object spread. + this.tokens.replaceToken(""); + this.rootTransformer.processBalancedCode(); + this.tokens.replaceToken(""); + } else { + break; + } + this.tokens.appendCode(","); + } + return keyCode; + } + + processPropName(propName) { + if (propName.includes("-")) { + this.tokens.replaceToken(`'${propName}'`); + } else { + this.tokens.copyToken(); + } + } + + processPropValue() { + if (this.tokens.matches1(_types.TokenType.braceL)) { + this.tokens.replaceToken(""); + this.rootTransformer.processBalancedCode(); + this.tokens.replaceToken(""); + } else if (this.tokens.matches1(_types.TokenType.jsxTagStart)) { + this.processJSXTag(); + } else { + this.processStringPropValue(); + } + } + + processStringPropValue() { + const token = this.tokens.currentToken(); + const valueCode = this.tokens.code.slice(token.start + 1, token.end - 1); + const replacementCode = formatJSXTextReplacement(valueCode); + const literalCode = formatJSXStringValueLiteral(valueCode); + this.tokens.replaceToken(literalCode + replacementCode); + } + + /** + * Starting in the middle of the props object literal, produce an additional + * prop for the children and close the object literal. + */ + processAutomaticChildrenAndEndProps(jsxRole) { + if (jsxRole === _tokenizer.JSXRole.StaticChildren) { + this.tokens.appendCode(" children: ["); + this.processChildren(false); + this.tokens.appendCode("]}"); + } else { + // The parser information tells us whether we will see a real child or if + // all remaining children (if any) will resolve to empty. If there are no + // non-empty children, don't emit a children prop at all, but still + // process children so that we properly transform the code into nothing. + if (jsxRole === _tokenizer.JSXRole.OneChild) { + this.tokens.appendCode(" children: "); + } + this.processChildren(false); + this.tokens.appendCode("}"); + } + } + + /** + * Transform children into a comma-separated list, which will be either + * arguments to createElement or array elements of a children prop. + */ + processChildren(needsInitialComma) { + let needsComma = needsInitialComma; + while (true) { + if (this.tokens.matches2(_types.TokenType.jsxTagStart, _types.TokenType.slash)) { + // Closing tag, so no more children. + return; + } + let didEmitElement = false; + if (this.tokens.matches1(_types.TokenType.braceL)) { + if (this.tokens.matches2(_types.TokenType.braceL, _types.TokenType.braceR)) { + // Empty interpolations and comment-only interpolations are allowed + // and don't create an extra child arg. + this.tokens.replaceToken(""); + this.tokens.replaceToken(""); + } else { + // Interpolated expression. + this.tokens.replaceToken(needsComma ? ", " : ""); + this.rootTransformer.processBalancedCode(); + this.tokens.replaceToken(""); + didEmitElement = true; + } + } else if (this.tokens.matches1(_types.TokenType.jsxTagStart)) { + // Child JSX element + this.tokens.appendCode(needsComma ? ", " : ""); + this.processJSXTag(); + didEmitElement = true; + } else if (this.tokens.matches1(_types.TokenType.jsxText) || this.tokens.matches1(_types.TokenType.jsxEmptyText)) { + didEmitElement = this.processChildTextElement(needsComma); + } else { + throw new Error("Unexpected token when processing JSX children."); + } + if (didEmitElement) { + needsComma = true; + } + } + } + + /** + * Turn a JSX text element into a string literal, or nothing at all if the JSX + * text resolves to the empty string. + * + * Returns true if a string literal is emitted, false otherwise. + */ + processChildTextElement(needsComma) { + const token = this.tokens.currentToken(); + const valueCode = this.tokens.code.slice(token.start, token.end); + const replacementCode = formatJSXTextReplacement(valueCode); + const literalCode = formatJSXTextLiteral(valueCode); + if (literalCode === '""') { + this.tokens.replaceToken(replacementCode); + return false; + } else { + this.tokens.replaceToken(`${needsComma ? ", " : ""}${literalCode}${replacementCode}`); + return true; + } + } + + getDevSource(elementLocationCode) { + return `{fileName: ${this.getFilenameVarName()}, ${elementLocationCode}}`; + } + + getFilenameVarName() { + if (!this.filenameVarName) { + this.filenameVarName = this.nameManager.claimFreeName("_jsxFileName"); + } + return this.filenameVarName; + } +} exports.default = JSXTransformer; + +/** + * Spec for identifiers: https://tc39.github.io/ecma262/#prod-IdentifierStart. + * + * Really only treat anything starting with a-z as tag names. `_`, `$`, `é` + * should be treated as component names + */ + function startsWithLowerCase(s) { + const firstChar = s.charCodeAt(0); + return firstChar >= _charcodes.charCodes.lowercaseA && firstChar <= _charcodes.charCodes.lowercaseZ; +} exports.startsWithLowerCase = startsWithLowerCase; + +/** + * Turn the given jsxText string into a JS string literal. Leading and trailing + * whitespace on lines is removed, except immediately after the open-tag and + * before the close-tag. Empty lines are completely removed, and spaces are + * added between lines after that. + * + * We use JSON.stringify to introduce escape characters as necessary, and trim + * the start and end of each line and remove blank lines. + */ +function formatJSXTextLiteral(text) { + let result = ""; + let whitespace = ""; + + let isInInitialLineWhitespace = false; + let seenNonWhitespace = false; + for (let i = 0; i < text.length; i++) { + const c = text[i]; + if (c === " " || c === "\t" || c === "\r") { + if (!isInInitialLineWhitespace) { + whitespace += c; + } + } else if (c === "\n") { + whitespace = ""; + isInInitialLineWhitespace = true; + } else { + if (seenNonWhitespace && isInInitialLineWhitespace) { + result += " "; + } + result += whitespace; + whitespace = ""; + if (c === "&") { + const {entity, newI} = processEntity(text, i + 1); + i = newI - 1; + result += entity; + } else { + result += c; + } + seenNonWhitespace = true; + isInInitialLineWhitespace = false; + } + } + if (!isInInitialLineWhitespace) { + result += whitespace; + } + return JSON.stringify(result); +} + +/** + * Produce the code that should be printed after the JSX text string literal, + * with most content removed, but all newlines preserved and all spacing at the + * end preserved. + */ +function formatJSXTextReplacement(text) { + let numNewlines = 0; + let numSpaces = 0; + for (const c of text) { + if (c === "\n") { + numNewlines++; + numSpaces = 0; + } else if (c === " ") { + numSpaces++; + } + } + return "\n".repeat(numNewlines) + " ".repeat(numSpaces); +} + +/** + * Format a string in the value position of a JSX prop. + * + * Use the same implementation as convertAttribute from + * babel-helper-builder-react-jsx. + */ +function formatJSXStringValueLiteral(text) { + let result = ""; + for (let i = 0; i < text.length; i++) { + const c = text[i]; + if (c === "\n") { + if (/\s/.test(text[i + 1])) { + result += " "; + while (i < text.length && /\s/.test(text[i + 1])) { + i++; + } + } else { + result += "\n"; + } + } else if (c === "&") { + const {entity, newI} = processEntity(text, i + 1); + result += entity; + i = newI - 1; + } else { + result += c; + } + } + return JSON.stringify(result); +} + +/** + * Starting at a &, see if there's an HTML entity (specified by name, decimal + * char code, or hex char code) and return it if so. + * + * Modified from jsxReadString in babel-parser. + */ +function processEntity(text, indexAfterAmpersand) { + let str = ""; + let count = 0; + let entity; + let i = indexAfterAmpersand; + + if (text[i] === "#") { + let radix = 10; + i++; + let numStart; + if (text[i] === "x") { + radix = 16; + i++; + numStart = i; + while (i < text.length && isHexDigit(text.charCodeAt(i))) { + i++; + } + } else { + numStart = i; + while (i < text.length && isDecimalDigit(text.charCodeAt(i))) { + i++; + } + } + if (text[i] === ";") { + const numStr = text.slice(numStart, i); + if (numStr) { + i++; + entity = String.fromCodePoint(parseInt(numStr, radix)); + } + } + } else { + while (i < text.length && count++ < 10) { + const ch = text[i]; + i++; + if (ch === ";") { + entity = _xhtml2.default.get(str); + break; + } + str += ch; + } + } + + if (!entity) { + return {entity: "&", newI: indexAfterAmpersand}; + } + return {entity, newI: i}; +} + +function isDecimalDigit(code) { + return code >= _charcodes.charCodes.digit0 && code <= _charcodes.charCodes.digit9; +} + +function isHexDigit(code) { + return ( + (code >= _charcodes.charCodes.digit0 && code <= _charcodes.charCodes.digit9) || + (code >= _charcodes.charCodes.lowercaseA && code <= _charcodes.charCodes.lowercaseF) || + (code >= _charcodes.charCodes.uppercaseA && code <= _charcodes.charCodes.uppercaseF) + ); +} Index: frontend/node_modules/sucrase/dist/transformers/JestHoistTransformer.js =================================================================== --- frontend/node_modules/sucrase/dist/transformers/JestHoistTransformer.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/transformers/JestHoistTransformer.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,111 @@ +"use strict";Object.defineProperty(exports, "__esModule", {value: true}); function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; } function _optionalChain(ops) { let lastAccessLHS = undefined; let value = ops[0]; let i = 1; while (i < ops.length) { const op = ops[i]; const fn = ops[i + 1]; i += 2; if ((op === 'optionalAccess' || op === 'optionalCall') && value == null) { return undefined; } if (op === 'access' || op === 'optionalAccess') { lastAccessLHS = value; value = fn(value); } else if (op === 'call' || op === 'optionalCall') { value = fn((...args) => value.call(lastAccessLHS, ...args)); lastAccessLHS = undefined; } } return value; } + +var _types = require('../parser/tokenizer/types'); + + +var _Transformer = require('./Transformer'); var _Transformer2 = _interopRequireDefault(_Transformer); + +const JEST_GLOBAL_NAME = "jest"; +const HOISTED_METHODS = ["mock", "unmock", "enableAutomock", "disableAutomock"]; + +/** + * Implementation of babel-plugin-jest-hoist, which hoists up some jest method + * calls above the imports to allow them to override other imports. + * + * To preserve line numbers, rather than directly moving the jest.mock code, we + * wrap each invocation in a function statement and then call the function from + * the top of the file. + */ + class JestHoistTransformer extends _Transformer2.default { + __init() {this.hoistedFunctionNames = []} + + constructor( + rootTransformer, + tokens, + nameManager, + importProcessor, + ) { + super();this.rootTransformer = rootTransformer;this.tokens = tokens;this.nameManager = nameManager;this.importProcessor = importProcessor;JestHoistTransformer.prototype.__init.call(this);; + } + + process() { + if ( + this.tokens.currentToken().scopeDepth === 0 && + this.tokens.matches4(_types.TokenType.name, _types.TokenType.dot, _types.TokenType.name, _types.TokenType.parenL) && + this.tokens.identifierName() === JEST_GLOBAL_NAME + ) { + // TODO: This only works if imports transform is active, which it will be for jest. + // But if jest adds module support and we no longer need the import transform, this needs fixing. + if (_optionalChain([this, 'access', _ => _.importProcessor, 'optionalAccess', _2 => _2.getGlobalNames, 'call', _3 => _3(), 'optionalAccess', _4 => _4.has, 'call', _5 => _5(JEST_GLOBAL_NAME)])) { + return false; + } + return this.extractHoistedCalls(); + } + + return false; + } + + getHoistedCode() { + if (this.hoistedFunctionNames.length > 0) { + // This will be placed before module interop code, but that's fine since + // imports aren't allowed in module mock factories. + return this.hoistedFunctionNames.map((name) => `${name}();`).join(""); + } + return ""; + } + + /** + * Extracts any methods calls on the jest-object that should be hoisted. + * + * According to the jest docs, https://jestjs.io/docs/en/jest-object#jestmockmodulename-factory-options, + * mock, unmock, enableAutomock, disableAutomock, are the methods that should be hoisted. + * + * We do not apply the same checks of the arguments as babel-plugin-jest-hoist does. + */ + extractHoistedCalls() { + // We're handling a chain of calls where `jest` may or may not need to be inserted for each call + // in the chain, so remove the initial `jest` to make the loop implementation cleaner. + this.tokens.removeToken(); + // Track some state so that multiple non-hoisted chained calls in a row keep their chaining + // syntax. + let followsNonHoistedJestCall = false; + + // Iterate through all chained calls on the jest object. + while (this.tokens.matches3(_types.TokenType.dot, _types.TokenType.name, _types.TokenType.parenL)) { + const methodName = this.tokens.identifierNameAtIndex(this.tokens.currentIndex() + 1); + const shouldHoist = HOISTED_METHODS.includes(methodName); + if (shouldHoist) { + // We've matched e.g. `.mock(...)` or similar call. + // Replace the initial `.` with `function __jestHoist(){jest.` + const hoistedFunctionName = this.nameManager.claimFreeName("__jestHoist"); + this.hoistedFunctionNames.push(hoistedFunctionName); + this.tokens.replaceToken(`function ${hoistedFunctionName}(){${JEST_GLOBAL_NAME}.`); + this.tokens.copyToken(); + this.tokens.copyToken(); + this.rootTransformer.processBalancedCode(); + this.tokens.copyExpectedToken(_types.TokenType.parenR); + this.tokens.appendCode(";}"); + followsNonHoistedJestCall = false; + } else { + // This is a non-hoisted method, so just transform the code as usual. + if (followsNonHoistedJestCall) { + // If we didn't hoist the previous call, we can leave the code as-is to chain off of the + // previous method call. It's important to preserve the code here because we don't know + // for sure that the method actually returned the jest object for chaining. + this.tokens.copyToken(); + } else { + // If we hoisted the previous call, we know it returns the jest object back, so we insert + // the identifier `jest` to continue the chain. + this.tokens.replaceToken(`${JEST_GLOBAL_NAME}.`); + } + this.tokens.copyToken(); + this.tokens.copyToken(); + this.rootTransformer.processBalancedCode(); + this.tokens.copyExpectedToken(_types.TokenType.parenR); + followsNonHoistedJestCall = true; + } + } + + return true; + } +} exports.default = JestHoistTransformer; Index: frontend/node_modules/sucrase/dist/transformers/NumericSeparatorTransformer.js =================================================================== --- frontend/node_modules/sucrase/dist/transformers/NumericSeparatorTransformer.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/transformers/NumericSeparatorTransformer.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,20 @@ +"use strict";Object.defineProperty(exports, "__esModule", {value: true}); function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }var _types = require('../parser/tokenizer/types'); + +var _Transformer = require('./Transformer'); var _Transformer2 = _interopRequireDefault(_Transformer); + + class NumericSeparatorTransformer extends _Transformer2.default { + constructor( tokens) { + super();this.tokens = tokens;; + } + + process() { + if (this.tokens.matches1(_types.TokenType.num)) { + const code = this.tokens.currentTokenCode(); + if (code.includes("_")) { + this.tokens.replaceToken(code.replace(/_/g, "")); + return true; + } + } + return false; + } +} exports.default = NumericSeparatorTransformer; Index: frontend/node_modules/sucrase/dist/transformers/OptionalCatchBindingTransformer.js =================================================================== --- frontend/node_modules/sucrase/dist/transformers/OptionalCatchBindingTransformer.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/transformers/OptionalCatchBindingTransformer.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,19 @@ +"use strict";Object.defineProperty(exports, "__esModule", {value: true}); function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; } +var _types = require('../parser/tokenizer/types'); + +var _Transformer = require('./Transformer'); var _Transformer2 = _interopRequireDefault(_Transformer); + + class OptionalCatchBindingTransformer extends _Transformer2.default { + constructor( tokens, nameManager) { + super();this.tokens = tokens;this.nameManager = nameManager;; + } + + process() { + if (this.tokens.matches2(_types.TokenType._catch, _types.TokenType.braceL)) { + this.tokens.copyToken(); + this.tokens.appendCode(` (${this.nameManager.claimFreeName("e")})`); + return true; + } + return false; + } +} exports.default = OptionalCatchBindingTransformer; Index: frontend/node_modules/sucrase/dist/transformers/OptionalChainingNullishTransformer.js =================================================================== --- frontend/node_modules/sucrase/dist/transformers/OptionalChainingNullishTransformer.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/transformers/OptionalChainingNullishTransformer.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,155 @@ +"use strict";Object.defineProperty(exports, "__esModule", {value: true}); function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; } +var _types = require('../parser/tokenizer/types'); + +var _Transformer = require('./Transformer'); var _Transformer2 = _interopRequireDefault(_Transformer); + +/** + * Transformer supporting the optional chaining and nullish coalescing operators. + * + * Tech plan here: + * https://github.com/alangpierce/sucrase/wiki/Sucrase-Optional-Chaining-and-Nullish-Coalescing-Technical-Plan + * + * The prefix and suffix code snippets are handled by TokenProcessor, and this transformer handles + * the operators themselves. + */ + class OptionalChainingNullishTransformer extends _Transformer2.default { + constructor( tokens, nameManager) { + super();this.tokens = tokens;this.nameManager = nameManager;; + } + + process() { + if (this.tokens.matches1(_types.TokenType.nullishCoalescing)) { + const token = this.tokens.currentToken(); + if (this.tokens.tokens[token.nullishStartIndex].isAsyncOperation) { + this.tokens.replaceTokenTrimmingLeftWhitespace(", async () => ("); + } else { + this.tokens.replaceTokenTrimmingLeftWhitespace(", () => ("); + } + return true; + } + if (this.tokens.matches1(_types.TokenType._delete)) { + const nextToken = this.tokens.tokenAtRelativeIndex(1); + if (nextToken.isOptionalChainStart) { + this.tokens.removeInitialToken(); + return true; + } + } + const token = this.tokens.currentToken(); + const chainStart = token.subscriptStartIndex; + if ( + chainStart != null && + this.tokens.tokens[chainStart].isOptionalChainStart && + // Super subscripts can't be optional (since super is never null/undefined), and the syntax + // relies on the subscript being intact, so leave this token alone. + this.tokens.tokenAtRelativeIndex(-1).type !== _types.TokenType._super + ) { + const param = this.nameManager.claimFreeName("_"); + let arrowStartSnippet; + if ( + chainStart > 0 && + this.tokens.matches1AtIndex(chainStart - 1, _types.TokenType._delete) && + this.isLastSubscriptInChain() + ) { + // Delete operations are special: we already removed the delete keyword, and to still + // perform a delete, we need to insert a delete in the very last part of the chain, which + // in correct code will always be a property access. + arrowStartSnippet = `${param} => delete ${param}`; + } else { + arrowStartSnippet = `${param} => ${param}`; + } + if (this.tokens.tokens[chainStart].isAsyncOperation) { + arrowStartSnippet = `async ${arrowStartSnippet}`; + } + if ( + this.tokens.matches2(_types.TokenType.questionDot, _types.TokenType.parenL) || + this.tokens.matches2(_types.TokenType.questionDot, _types.TokenType.lessThan) + ) { + if (this.justSkippedSuper()) { + this.tokens.appendCode(".bind(this)"); + } + this.tokens.replaceTokenTrimmingLeftWhitespace(`, 'optionalCall', ${arrowStartSnippet}`); + } else if (this.tokens.matches2(_types.TokenType.questionDot, _types.TokenType.bracketL)) { + this.tokens.replaceTokenTrimmingLeftWhitespace(`, 'optionalAccess', ${arrowStartSnippet}`); + } else if (this.tokens.matches1(_types.TokenType.questionDot)) { + this.tokens.replaceTokenTrimmingLeftWhitespace(`, 'optionalAccess', ${arrowStartSnippet}.`); + } else if (this.tokens.matches1(_types.TokenType.dot)) { + this.tokens.replaceTokenTrimmingLeftWhitespace(`, 'access', ${arrowStartSnippet}.`); + } else if (this.tokens.matches1(_types.TokenType.bracketL)) { + this.tokens.replaceTokenTrimmingLeftWhitespace(`, 'access', ${arrowStartSnippet}[`); + } else if (this.tokens.matches1(_types.TokenType.parenL)) { + if (this.justSkippedSuper()) { + this.tokens.appendCode(".bind(this)"); + } + this.tokens.replaceTokenTrimmingLeftWhitespace(`, 'call', ${arrowStartSnippet}(`); + } else { + throw new Error("Unexpected subscript operator in optional chain."); + } + return true; + } + return false; + } + + /** + * Determine if the current token is the last of its chain, so that we know whether it's eligible + * to have a delete op inserted. + * + * We can do this by walking forward until we determine one way or another. Each + * isOptionalChainStart token must be paired with exactly one isOptionalChainEnd token after it in + * a nesting way, so we can track depth and walk to the end of the chain (the point where the + * depth goes negative) and see if any other subscript token is after us in the chain. + */ + isLastSubscriptInChain() { + let depth = 0; + for (let i = this.tokens.currentIndex() + 1; ; i++) { + if (i >= this.tokens.tokens.length) { + throw new Error("Reached the end of the code while finding the end of the access chain."); + } + if (this.tokens.tokens[i].isOptionalChainStart) { + depth++; + } else if (this.tokens.tokens[i].isOptionalChainEnd) { + depth--; + } + if (depth < 0) { + return true; + } + + // This subscript token is a later one in the same chain. + if (depth === 0 && this.tokens.tokens[i].subscriptStartIndex != null) { + return false; + } + } + } + + /** + * Determine if we are the open-paren in an expression like super.a()?.b. + * + * We can do this by walking backward to find the previous subscript. If that subscript was + * preceded by a super, then we must be the subscript after it, so if this is a call expression, + * we'll need to attach the right context. + */ + justSkippedSuper() { + let depth = 0; + let index = this.tokens.currentIndex() - 1; + while (true) { + if (index < 0) { + throw new Error( + "Reached the start of the code while finding the start of the access chain.", + ); + } + if (this.tokens.tokens[index].isOptionalChainStart) { + depth--; + } else if (this.tokens.tokens[index].isOptionalChainEnd) { + depth++; + } + if (depth < 0) { + return false; + } + + // This subscript token is a later one in the same chain. + if (depth === 0 && this.tokens.tokens[index].subscriptStartIndex != null) { + return this.tokens.tokens[index - 1].type === _types.TokenType._super; + } + index--; + } + } +} exports.default = OptionalChainingNullishTransformer; Index: frontend/node_modules/sucrase/dist/transformers/ReactDisplayNameTransformer.js =================================================================== --- frontend/node_modules/sucrase/dist/transformers/ReactDisplayNameTransformer.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/transformers/ReactDisplayNameTransformer.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,160 @@ +"use strict";Object.defineProperty(exports, "__esModule", {value: true}); function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; } + +var _tokenizer = require('../parser/tokenizer'); +var _types = require('../parser/tokenizer/types'); + + +var _Transformer = require('./Transformer'); var _Transformer2 = _interopRequireDefault(_Transformer); + +/** + * Implementation of babel-plugin-transform-react-display-name, which adds a + * display name to usages of React.createClass and createReactClass. + */ + class ReactDisplayNameTransformer extends _Transformer2.default { + constructor( + rootTransformer, + tokens, + importProcessor, + options, + ) { + super();this.rootTransformer = rootTransformer;this.tokens = tokens;this.importProcessor = importProcessor;this.options = options;; + } + + process() { + const startIndex = this.tokens.currentIndex(); + if (this.tokens.identifierName() === "createReactClass") { + const newName = + this.importProcessor && this.importProcessor.getIdentifierReplacement("createReactClass"); + if (newName) { + this.tokens.replaceToken(`(0, ${newName})`); + } else { + this.tokens.copyToken(); + } + this.tryProcessCreateClassCall(startIndex); + return true; + } + if ( + this.tokens.matches3(_types.TokenType.name, _types.TokenType.dot, _types.TokenType.name) && + this.tokens.identifierName() === "React" && + this.tokens.identifierNameAtIndex(this.tokens.currentIndex() + 2) === "createClass" + ) { + const newName = this.importProcessor + ? this.importProcessor.getIdentifierReplacement("React") || "React" + : "React"; + if (newName) { + this.tokens.replaceToken(newName); + this.tokens.copyToken(); + this.tokens.copyToken(); + } else { + this.tokens.copyToken(); + this.tokens.copyToken(); + this.tokens.copyToken(); + } + this.tryProcessCreateClassCall(startIndex); + return true; + } + return false; + } + + /** + * This is called with the token position at the open-paren. + */ + tryProcessCreateClassCall(startIndex) { + const displayName = this.findDisplayName(startIndex); + if (!displayName) { + return; + } + + if (this.classNeedsDisplayName()) { + this.tokens.copyExpectedToken(_types.TokenType.parenL); + this.tokens.copyExpectedToken(_types.TokenType.braceL); + this.tokens.appendCode(`displayName: '${displayName}',`); + this.rootTransformer.processBalancedCode(); + this.tokens.copyExpectedToken(_types.TokenType.braceR); + this.tokens.copyExpectedToken(_types.TokenType.parenR); + } + } + + findDisplayName(startIndex) { + if (startIndex < 2) { + return null; + } + if (this.tokens.matches2AtIndex(startIndex - 2, _types.TokenType.name, _types.TokenType.eq)) { + // This is an assignment (or declaration) and the LHS is either an identifier or a member + // expression ending in an identifier, so use that identifier name. + return this.tokens.identifierNameAtIndex(startIndex - 2); + } + if ( + startIndex >= 2 && + this.tokens.tokens[startIndex - 2].identifierRole === _tokenizer.IdentifierRole.ObjectKey + ) { + // This is an object literal value. + return this.tokens.identifierNameAtIndex(startIndex - 2); + } + if (this.tokens.matches2AtIndex(startIndex - 2, _types.TokenType._export, _types.TokenType._default)) { + return this.getDisplayNameFromFilename(); + } + return null; + } + + getDisplayNameFromFilename() { + const filePath = this.options.filePath || "unknown"; + const pathSegments = filePath.split("/"); + const filename = pathSegments[pathSegments.length - 1]; + const dotIndex = filename.lastIndexOf("."); + const baseFilename = dotIndex === -1 ? filename : filename.slice(0, dotIndex); + if (baseFilename === "index" && pathSegments[pathSegments.length - 2]) { + return pathSegments[pathSegments.length - 2]; + } else { + return baseFilename; + } + } + + /** + * We only want to add a display name when this is a function call containing + * one argument, which is an object literal without `displayName` as an + * existing key. + */ + classNeedsDisplayName() { + let index = this.tokens.currentIndex(); + if (!this.tokens.matches2(_types.TokenType.parenL, _types.TokenType.braceL)) { + return false; + } + // The block starts on the {, and we expect any displayName key to be in + // that context. We need to ignore other other contexts to avoid matching + // nested displayName keys. + const objectStartIndex = index + 1; + const objectContextId = this.tokens.tokens[objectStartIndex].contextId; + if (objectContextId == null) { + throw new Error("Expected non-null context ID on object open-brace."); + } + + for (; index < this.tokens.tokens.length; index++) { + const token = this.tokens.tokens[index]; + if (token.type === _types.TokenType.braceR && token.contextId === objectContextId) { + index++; + break; + } + + if ( + this.tokens.identifierNameAtIndex(index) === "displayName" && + this.tokens.tokens[index].identifierRole === _tokenizer.IdentifierRole.ObjectKey && + token.contextId === objectContextId + ) { + // We found a displayName key, so bail out. + return false; + } + } + + if (index === this.tokens.tokens.length) { + throw new Error("Unexpected end of input when processing React class."); + } + + // If we got this far, we know we have createClass with an object with no + // display name, so we want to proceed as long as that was the only argument. + return ( + this.tokens.matches1AtIndex(index, _types.TokenType.parenR) || + this.tokens.matches2AtIndex(index, _types.TokenType.comma, _types.TokenType.parenR) + ); + } +} exports.default = ReactDisplayNameTransformer; Index: frontend/node_modules/sucrase/dist/transformers/ReactHotLoaderTransformer.js =================================================================== --- frontend/node_modules/sucrase/dist/transformers/ReactHotLoaderTransformer.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/transformers/ReactHotLoaderTransformer.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,69 @@ +"use strict";Object.defineProperty(exports, "__esModule", {value: true}); function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }var _tokenizer = require('../parser/tokenizer'); + +var _Transformer = require('./Transformer'); var _Transformer2 = _interopRequireDefault(_Transformer); + + class ReactHotLoaderTransformer extends _Transformer2.default { + __init() {this.extractedDefaultExportName = null} + + constructor( tokens, filePath) { + super();this.tokens = tokens;this.filePath = filePath;ReactHotLoaderTransformer.prototype.__init.call(this);; + } + + setExtractedDefaultExportName(extractedDefaultExportName) { + this.extractedDefaultExportName = extractedDefaultExportName; + } + + getPrefixCode() { + return ` + (function () { + var enterModule = require('react-hot-loader').enterModule; + enterModule && enterModule(module); + })();` + .replace(/\s+/g, " ") + .trim(); + } + + getSuffixCode() { + const topLevelNames = new Set(); + for (const token of this.tokens.tokens) { + if ( + !token.isType && + _tokenizer.isTopLevelDeclaration.call(void 0, token) && + token.identifierRole !== _tokenizer.IdentifierRole.ImportDeclaration + ) { + topLevelNames.add(this.tokens.identifierNameForToken(token)); + } + } + const namesToRegister = Array.from(topLevelNames).map((name) => ({ + variableName: name, + uniqueLocalName: name, + })); + if (this.extractedDefaultExportName) { + namesToRegister.push({ + variableName: this.extractedDefaultExportName, + uniqueLocalName: "default", + }); + } + return ` +;(function () { + var reactHotLoader = require('react-hot-loader').default; + var leaveModule = require('react-hot-loader').leaveModule; + if (!reactHotLoader) { + return; + } +${namesToRegister + .map( + ({variableName, uniqueLocalName}) => + ` reactHotLoader.register(${variableName}, "${uniqueLocalName}", ${JSON.stringify( + this.filePath || "", + )});`, + ) + .join("\n")} + leaveModule(module); +})();`; + } + + process() { + return false; + } +} exports.default = ReactHotLoaderTransformer; Index: frontend/node_modules/sucrase/dist/transformers/RootTransformer.js =================================================================== --- frontend/node_modules/sucrase/dist/transformers/RootTransformer.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/transformers/RootTransformer.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,462 @@ +"use strict";Object.defineProperty(exports, "__esModule", {value: true}); function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; } + + +var _keywords = require('../parser/tokenizer/keywords'); +var _types = require('../parser/tokenizer/types'); + +var _getClassInfo = require('../util/getClassInfo'); var _getClassInfo2 = _interopRequireDefault(_getClassInfo); +var _CJSImportTransformer = require('./CJSImportTransformer'); var _CJSImportTransformer2 = _interopRequireDefault(_CJSImportTransformer); +var _ESMImportTransformer = require('./ESMImportTransformer'); var _ESMImportTransformer2 = _interopRequireDefault(_ESMImportTransformer); +var _FlowTransformer = require('./FlowTransformer'); var _FlowTransformer2 = _interopRequireDefault(_FlowTransformer); +var _JestHoistTransformer = require('./JestHoistTransformer'); var _JestHoistTransformer2 = _interopRequireDefault(_JestHoistTransformer); +var _JSXTransformer = require('./JSXTransformer'); var _JSXTransformer2 = _interopRequireDefault(_JSXTransformer); +var _NumericSeparatorTransformer = require('./NumericSeparatorTransformer'); var _NumericSeparatorTransformer2 = _interopRequireDefault(_NumericSeparatorTransformer); +var _OptionalCatchBindingTransformer = require('./OptionalCatchBindingTransformer'); var _OptionalCatchBindingTransformer2 = _interopRequireDefault(_OptionalCatchBindingTransformer); +var _OptionalChainingNullishTransformer = require('./OptionalChainingNullishTransformer'); var _OptionalChainingNullishTransformer2 = _interopRequireDefault(_OptionalChainingNullishTransformer); +var _ReactDisplayNameTransformer = require('./ReactDisplayNameTransformer'); var _ReactDisplayNameTransformer2 = _interopRequireDefault(_ReactDisplayNameTransformer); +var _ReactHotLoaderTransformer = require('./ReactHotLoaderTransformer'); var _ReactHotLoaderTransformer2 = _interopRequireDefault(_ReactHotLoaderTransformer); + +var _TypeScriptTransformer = require('./TypeScriptTransformer'); var _TypeScriptTransformer2 = _interopRequireDefault(_TypeScriptTransformer); + + + + + + + + + class RootTransformer { + __init() {this.transformers = []} + + + __init2() {this.generatedVariables = []} + + + + + + constructor( + sucraseContext, + transforms, + enableLegacyBabel5ModuleInterop, + options, + ) {;RootTransformer.prototype.__init.call(this);RootTransformer.prototype.__init2.call(this); + this.nameManager = sucraseContext.nameManager; + this.helperManager = sucraseContext.helperManager; + const {tokenProcessor, importProcessor} = sucraseContext; + this.tokens = tokenProcessor; + this.isImportsTransformEnabled = transforms.includes("imports"); + this.isReactHotLoaderTransformEnabled = transforms.includes("react-hot-loader"); + this.disableESTransforms = Boolean(options.disableESTransforms); + + if (!options.disableESTransforms) { + this.transformers.push( + new (0, _OptionalChainingNullishTransformer2.default)(tokenProcessor, this.nameManager), + ); + this.transformers.push(new (0, _NumericSeparatorTransformer2.default)(tokenProcessor)); + this.transformers.push(new (0, _OptionalCatchBindingTransformer2.default)(tokenProcessor, this.nameManager)); + } + + if (transforms.includes("jsx")) { + if (options.jsxRuntime !== "preserve") { + this.transformers.push( + new (0, _JSXTransformer2.default)(this, tokenProcessor, importProcessor, this.nameManager, options), + ); + } + this.transformers.push( + new (0, _ReactDisplayNameTransformer2.default)(this, tokenProcessor, importProcessor, options), + ); + } + + let reactHotLoaderTransformer = null; + if (transforms.includes("react-hot-loader")) { + if (!options.filePath) { + throw new Error("filePath is required when using the react-hot-loader transform."); + } + reactHotLoaderTransformer = new (0, _ReactHotLoaderTransformer2.default)(tokenProcessor, options.filePath); + this.transformers.push(reactHotLoaderTransformer); + } + + // Note that we always want to enable the imports transformer, even when the import transform + // itself isn't enabled, since we need to do type-only import pruning for both Flow and + // TypeScript. + if (transforms.includes("imports")) { + if (importProcessor === null) { + throw new Error("Expected non-null importProcessor with imports transform enabled."); + } + this.transformers.push( + new (0, _CJSImportTransformer2.default)( + this, + tokenProcessor, + importProcessor, + this.nameManager, + this.helperManager, + reactHotLoaderTransformer, + enableLegacyBabel5ModuleInterop, + Boolean(options.enableLegacyTypeScriptModuleInterop), + transforms.includes("typescript"), + transforms.includes("flow"), + Boolean(options.preserveDynamicImport), + Boolean(options.keepUnusedImports), + ), + ); + } else { + this.transformers.push( + new (0, _ESMImportTransformer2.default)( + tokenProcessor, + this.nameManager, + this.helperManager, + reactHotLoaderTransformer, + transforms.includes("typescript"), + transforms.includes("flow"), + Boolean(options.keepUnusedImports), + options, + ), + ); + } + + if (transforms.includes("flow")) { + this.transformers.push( + new (0, _FlowTransformer2.default)(this, tokenProcessor, transforms.includes("imports")), + ); + } + if (transforms.includes("typescript")) { + this.transformers.push( + new (0, _TypeScriptTransformer2.default)(this, tokenProcessor, transforms.includes("imports")), + ); + } + if (transforms.includes("jest")) { + this.transformers.push( + new (0, _JestHoistTransformer2.default)(this, tokenProcessor, this.nameManager, importProcessor), + ); + } + } + + transform() { + this.tokens.reset(); + this.processBalancedCode(); + const shouldAddUseStrict = this.isImportsTransformEnabled; + // "use strict" always needs to be first, so override the normal transformer order. + let prefix = shouldAddUseStrict ? '"use strict";' : ""; + for (const transformer of this.transformers) { + prefix += transformer.getPrefixCode(); + } + prefix += this.helperManager.emitHelpers(); + prefix += this.generatedVariables.map((v) => ` var ${v};`).join(""); + for (const transformer of this.transformers) { + prefix += transformer.getHoistedCode(); + } + let suffix = ""; + for (const transformer of this.transformers) { + suffix += transformer.getSuffixCode(); + } + const result = this.tokens.finish(); + let {code} = result; + if (code.startsWith("#!")) { + let newlineIndex = code.indexOf("\n"); + if (newlineIndex === -1) { + newlineIndex = code.length; + code += "\n"; + } + return { + code: code.slice(0, newlineIndex + 1) + prefix + code.slice(newlineIndex + 1) + suffix, + // The hashbang line has no tokens, so shifting the tokens to account + // for prefix can happen normally. + mappings: this.shiftMappings(result.mappings, prefix.length), + }; + } else { + return { + code: prefix + code + suffix, + mappings: this.shiftMappings(result.mappings, prefix.length), + }; + } + } + + processBalancedCode() { + let braceDepth = 0; + let parenDepth = 0; + while (!this.tokens.isAtEnd()) { + if (this.tokens.matches1(_types.TokenType.braceL) || this.tokens.matches1(_types.TokenType.dollarBraceL)) { + braceDepth++; + } else if (this.tokens.matches1(_types.TokenType.braceR)) { + if (braceDepth === 0) { + return; + } + braceDepth--; + } + if (this.tokens.matches1(_types.TokenType.parenL)) { + parenDepth++; + } else if (this.tokens.matches1(_types.TokenType.parenR)) { + if (parenDepth === 0) { + return; + } + parenDepth--; + } + this.processToken(); + } + } + + processToken() { + if (this.tokens.matches1(_types.TokenType._class)) { + this.processClass(); + return; + } + for (const transformer of this.transformers) { + const wasProcessed = transformer.process(); + if (wasProcessed) { + return; + } + } + this.tokens.copyToken(); + } + + /** + * Skip past a class with a name and return that name. + */ + processNamedClass() { + if (!this.tokens.matches2(_types.TokenType._class, _types.TokenType.name)) { + throw new Error("Expected identifier for exported class name."); + } + const name = this.tokens.identifierNameAtIndex(this.tokens.currentIndex() + 1); + this.processClass(); + return name; + } + + processClass() { + const classInfo = _getClassInfo2.default.call(void 0, this, this.tokens, this.nameManager, this.disableESTransforms); + + // Both static and instance initializers need a class name to use to invoke the initializer, so + // assign to one if necessary. + const needsCommaExpression = + (classInfo.headerInfo.isExpression || !classInfo.headerInfo.className) && + classInfo.staticInitializerNames.length + classInfo.instanceInitializerNames.length > 0; + + let className = classInfo.headerInfo.className; + if (needsCommaExpression) { + className = this.nameManager.claimFreeName("_class"); + this.generatedVariables.push(className); + this.tokens.appendCode(` (${className} =`); + } + + const classToken = this.tokens.currentToken(); + const contextId = classToken.contextId; + if (contextId == null) { + throw new Error("Expected class to have a context ID."); + } + this.tokens.copyExpectedToken(_types.TokenType._class); + while (!this.tokens.matchesContextIdAndLabel(_types.TokenType.braceL, contextId)) { + this.processToken(); + } + + this.processClassBody(classInfo, className); + + const staticInitializerStatements = classInfo.staticInitializerNames.map( + (name) => `${className}.${name}()`, + ); + if (needsCommaExpression) { + this.tokens.appendCode( + `, ${staticInitializerStatements.map((s) => `${s}, `).join("")}${className})`, + ); + } else if (classInfo.staticInitializerNames.length > 0) { + this.tokens.appendCode(` ${staticInitializerStatements.map((s) => `${s};`).join(" ")}`); + } + } + + /** + * We want to just handle class fields in all contexts, since TypeScript supports them. Later, + * when some JS implementations support class fields, this should be made optional. + */ + processClassBody(classInfo, className) { + const { + headerInfo, + constructorInsertPos, + constructorInitializerStatements, + fields, + instanceInitializerNames, + rangesToRemove, + } = classInfo; + let fieldIndex = 0; + let rangeToRemoveIndex = 0; + const classContextId = this.tokens.currentToken().contextId; + if (classContextId == null) { + throw new Error("Expected non-null context ID on class."); + } + this.tokens.copyExpectedToken(_types.TokenType.braceL); + if (this.isReactHotLoaderTransformEnabled) { + this.tokens.appendCode( + "__reactstandin__regenerateByEval(key, code) {this[key] = eval(code);}", + ); + } + + const needsConstructorInit = + constructorInitializerStatements.length + instanceInitializerNames.length > 0; + + if (constructorInsertPos === null && needsConstructorInit) { + const constructorInitializersCode = this.makeConstructorInitCode( + constructorInitializerStatements, + instanceInitializerNames, + className, + ); + if (headerInfo.hasSuperclass) { + const argsName = this.nameManager.claimFreeName("args"); + this.tokens.appendCode( + `constructor(...${argsName}) { super(...${argsName}); ${constructorInitializersCode}; }`, + ); + } else { + this.tokens.appendCode(`constructor() { ${constructorInitializersCode}; }`); + } + } + + while (!this.tokens.matchesContextIdAndLabel(_types.TokenType.braceR, classContextId)) { + if (fieldIndex < fields.length && this.tokens.currentIndex() === fields[fieldIndex].start) { + let needsCloseBrace = false; + if (this.tokens.matches1(_types.TokenType.bracketL)) { + this.tokens.copyTokenWithPrefix(`${fields[fieldIndex].initializerName}() {this`); + } else if (this.tokens.matches1(_types.TokenType.string) || this.tokens.matches1(_types.TokenType.num)) { + this.tokens.copyTokenWithPrefix(`${fields[fieldIndex].initializerName}() {this[`); + needsCloseBrace = true; + } else { + this.tokens.copyTokenWithPrefix(`${fields[fieldIndex].initializerName}() {this.`); + } + while (this.tokens.currentIndex() < fields[fieldIndex].end) { + if (needsCloseBrace && this.tokens.currentIndex() === fields[fieldIndex].equalsIndex) { + this.tokens.appendCode("]"); + } + this.processToken(); + } + this.tokens.appendCode("}"); + fieldIndex++; + } else if ( + rangeToRemoveIndex < rangesToRemove.length && + this.tokens.currentIndex() >= rangesToRemove[rangeToRemoveIndex].start + ) { + if (this.tokens.currentIndex() < rangesToRemove[rangeToRemoveIndex].end) { + this.tokens.removeInitialToken(); + } + while (this.tokens.currentIndex() < rangesToRemove[rangeToRemoveIndex].end) { + this.tokens.removeToken(); + } + rangeToRemoveIndex++; + } else if (this.tokens.currentIndex() === constructorInsertPos) { + this.tokens.copyToken(); + if (needsConstructorInit) { + this.tokens.appendCode( + `;${this.makeConstructorInitCode( + constructorInitializerStatements, + instanceInitializerNames, + className, + )};`, + ); + } + this.processToken(); + } else { + this.processToken(); + } + } + this.tokens.copyExpectedToken(_types.TokenType.braceR); + } + + makeConstructorInitCode( + constructorInitializerStatements, + instanceInitializerNames, + className, + ) { + return [ + ...constructorInitializerStatements, + ...instanceInitializerNames.map((name) => `${className}.prototype.${name}.call(this)`), + ].join(";"); + } + + /** + * Normally it's ok to simply remove type tokens, but we need to be more careful when dealing with + * arrow function return types since they can confuse the parser. In that case, we want to move + * the close-paren to the same line as the arrow. + * + * See https://github.com/alangpierce/sucrase/issues/391 for more details. + */ + processPossibleArrowParamEnd() { + if (this.tokens.matches2(_types.TokenType.parenR, _types.TokenType.colon) && this.tokens.tokenAtRelativeIndex(1).isType) { + let nextNonTypeIndex = this.tokens.currentIndex() + 1; + // Look ahead to see if this is an arrow function or something else. + while (this.tokens.tokens[nextNonTypeIndex].isType) { + nextNonTypeIndex++; + } + if (this.tokens.matches1AtIndex(nextNonTypeIndex, _types.TokenType.arrow)) { + this.tokens.removeInitialToken(); + while (this.tokens.currentIndex() < nextNonTypeIndex) { + this.tokens.removeToken(); + } + this.tokens.replaceTokenTrimmingLeftWhitespace(") =>"); + return true; + } + } + return false; + } + + /** + * An async arrow function might be of the form: + * + * async < + * T + * >() => {} + * + * in which case, removing the type parameters will cause a syntax error. Detect this case and + * move the open-paren earlier. + */ + processPossibleAsyncArrowWithTypeParams() { + if ( + !this.tokens.matchesContextual(_keywords.ContextualKeyword._async) && + !this.tokens.matches1(_types.TokenType._async) + ) { + return false; + } + const nextToken = this.tokens.tokenAtRelativeIndex(1); + if (nextToken.type !== _types.TokenType.lessThan || !nextToken.isType) { + return false; + } + + let nextNonTypeIndex = this.tokens.currentIndex() + 1; + // Look ahead to see if this is an arrow function or something else. + while (this.tokens.tokens[nextNonTypeIndex].isType) { + nextNonTypeIndex++; + } + if (this.tokens.matches1AtIndex(nextNonTypeIndex, _types.TokenType.parenL)) { + this.tokens.replaceToken("async ("); + this.tokens.removeInitialToken(); + while (this.tokens.currentIndex() < nextNonTypeIndex) { + this.tokens.removeToken(); + } + this.tokens.removeToken(); + // We ate a ( token, so we need to process the tokens in between and then the ) token so that + // we remain balanced. + this.processBalancedCode(); + this.processToken(); + return true; + } + return false; + } + + processPossibleTypeRange() { + if (this.tokens.currentToken().isType) { + this.tokens.removeInitialToken(); + while (this.tokens.currentToken().isType) { + this.tokens.removeToken(); + } + return true; + } + return false; + } + + shiftMappings( + mappings, + prefixLength, + ) { + for (let i = 0; i < mappings.length; i++) { + const mapping = mappings[i]; + if (mapping !== undefined) { + mappings[i] = mapping + prefixLength; + } + } + return mappings; + } +} exports.default = RootTransformer; Index: frontend/node_modules/sucrase/dist/transformers/Transformer.js =================================================================== --- frontend/node_modules/sucrase/dist/transformers/Transformer.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/transformers/Transformer.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,16 @@ +"use strict";Object.defineProperty(exports, "__esModule", {value: true}); class Transformer { + // Return true if anything was processed, false otherwise. + + + getPrefixCode() { + return ""; + } + + getHoistedCode() { + return ""; + } + + getSuffixCode() { + return ""; + } +} exports.default = Transformer; Index: frontend/node_modules/sucrase/dist/transformers/TypeScriptTransformer.js =================================================================== --- frontend/node_modules/sucrase/dist/transformers/TypeScriptTransformer.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/transformers/TypeScriptTransformer.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,279 @@ +"use strict";Object.defineProperty(exports, "__esModule", {value: true}); function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; } +var _types = require('../parser/tokenizer/types'); + +var _isIdentifier = require('../util/isIdentifier'); var _isIdentifier2 = _interopRequireDefault(_isIdentifier); + +var _Transformer = require('./Transformer'); var _Transformer2 = _interopRequireDefault(_Transformer); + + class TypeScriptTransformer extends _Transformer2.default { + constructor( + rootTransformer, + tokens, + isImportsTransformEnabled, + ) { + super();this.rootTransformer = rootTransformer;this.tokens = tokens;this.isImportsTransformEnabled = isImportsTransformEnabled;; + } + + process() { + if ( + this.rootTransformer.processPossibleArrowParamEnd() || + this.rootTransformer.processPossibleAsyncArrowWithTypeParams() || + this.rootTransformer.processPossibleTypeRange() + ) { + return true; + } + if ( + this.tokens.matches1(_types.TokenType._public) || + this.tokens.matches1(_types.TokenType._protected) || + this.tokens.matches1(_types.TokenType._private) || + this.tokens.matches1(_types.TokenType._abstract) || + this.tokens.matches1(_types.TokenType._readonly) || + this.tokens.matches1(_types.TokenType._override) || + this.tokens.matches1(_types.TokenType.nonNullAssertion) + ) { + this.tokens.removeInitialToken(); + return true; + } + if (this.tokens.matches1(_types.TokenType._enum) || this.tokens.matches2(_types.TokenType._const, _types.TokenType._enum)) { + this.processEnum(); + return true; + } + if ( + this.tokens.matches2(_types.TokenType._export, _types.TokenType._enum) || + this.tokens.matches3(_types.TokenType._export, _types.TokenType._const, _types.TokenType._enum) + ) { + this.processEnum(true); + return true; + } + return false; + } + + processEnum(isExport = false) { + // We might have "export const enum", so just remove all relevant tokens. + this.tokens.removeInitialToken(); + while (this.tokens.matches1(_types.TokenType._const) || this.tokens.matches1(_types.TokenType._enum)) { + this.tokens.removeToken(); + } + const enumName = this.tokens.identifierName(); + this.tokens.removeToken(); + if (isExport && !this.isImportsTransformEnabled) { + this.tokens.appendCode("export "); + } + this.tokens.appendCode(`var ${enumName}; (function (${enumName})`); + this.tokens.copyExpectedToken(_types.TokenType.braceL); + this.processEnumBody(enumName); + this.tokens.copyExpectedToken(_types.TokenType.braceR); + if (isExport && this.isImportsTransformEnabled) { + this.tokens.appendCode(`)(${enumName} || (exports.${enumName} = ${enumName} = {}));`); + } else { + this.tokens.appendCode(`)(${enumName} || (${enumName} = {}));`); + } + } + + /** + * Transform an enum into equivalent JS. This has complexity in a few places: + * - TS allows string enums, numeric enums, and a mix of the two styles within an enum. + * - Enum keys are allowed to be referenced in later enum values. + * - Enum keys are allowed to be strings. + * - When enum values are omitted, they should follow an auto-increment behavior. + */ + processEnumBody(enumName) { + // Code that can be used to reference the previous enum member, or null if this is the first + // enum member. + let previousValueCode = null; + while (true) { + if (this.tokens.matches1(_types.TokenType.braceR)) { + break; + } + const {nameStringCode, variableName} = this.extractEnumKeyInfo(this.tokens.currentToken()); + this.tokens.removeInitialToken(); + + if ( + this.tokens.matches3(_types.TokenType.eq, _types.TokenType.string, _types.TokenType.comma) || + this.tokens.matches3(_types.TokenType.eq, _types.TokenType.string, _types.TokenType.braceR) + ) { + this.processStringLiteralEnumMember(enumName, nameStringCode, variableName); + } else if (this.tokens.matches1(_types.TokenType.eq)) { + this.processExplicitValueEnumMember(enumName, nameStringCode, variableName); + } else { + this.processImplicitValueEnumMember( + enumName, + nameStringCode, + variableName, + previousValueCode, + ); + } + if (this.tokens.matches1(_types.TokenType.comma)) { + this.tokens.removeToken(); + } + + if (variableName != null) { + previousValueCode = variableName; + } else { + previousValueCode = `${enumName}[${nameStringCode}]`; + } + } + } + + /** + * Detect name information about this enum key, which will be used to determine which code to emit + * and whether we should declare a variable as part of this declaration. + * + * Some cases to keep in mind: + * - Enum keys can be implicitly referenced later, e.g. `X = 1, Y = X`. In Sucrase, we implement + * this by declaring a variable `X` so that later expressions can use it. + * - In addition to the usual identifier key syntax, enum keys are allowed to be string literals, + * e.g. `"hello world" = 3,`. Template literal syntax is NOT allowed. + * - Even if the enum key is defined as a string literal, it may still be referenced by identifier + * later, e.g. `"X" = 1, Y = X`. That means that we need to detect whether or not a string + * literal is identifier-like and emit a variable if so, even if the declaration did not use an + * identifier. + * - Reserved keywords like `break` are valid enum keys, but are not valid to be referenced later + * and would be a syntax error if we emitted a variable, so we need to skip the variable + * declaration in those cases. + * + * The variableName return value captures these nuances: if non-null, we can and must emit a + * variable declaration, and if null, we can't and shouldn't. + */ + extractEnumKeyInfo(nameToken) { + if (nameToken.type === _types.TokenType.name) { + const name = this.tokens.identifierNameForToken(nameToken); + return { + nameStringCode: `"${name}"`, + variableName: _isIdentifier2.default.call(void 0, name) ? name : null, + }; + } else if (nameToken.type === _types.TokenType.string) { + const name = this.tokens.stringValueForToken(nameToken); + return { + nameStringCode: this.tokens.code.slice(nameToken.start, nameToken.end), + variableName: _isIdentifier2.default.call(void 0, name) ? name : null, + }; + } else { + throw new Error("Expected name or string at beginning of enum element."); + } + } + + /** + * Handle an enum member where the RHS is just a string literal (not omitted, not a number, and + * not a complex expression). This is the typical form for TS string enums, and in this case, we + * do *not* create a reverse mapping. + * + * This is called after deleting the key token, when the token processor is at the equals sign. + * + * Example 1: + * someKey = "some value" + * -> + * const someKey = "some value"; MyEnum["someKey"] = someKey; + * + * Example 2: + * "some key" = "some value" + * -> + * MyEnum["some key"] = "some value"; + */ + processStringLiteralEnumMember( + enumName, + nameStringCode, + variableName, + ) { + if (variableName != null) { + this.tokens.appendCode(`const ${variableName}`); + // = + this.tokens.copyToken(); + // value string + this.tokens.copyToken(); + this.tokens.appendCode(`; ${enumName}[${nameStringCode}] = ${variableName};`); + } else { + this.tokens.appendCode(`${enumName}[${nameStringCode}]`); + // = + this.tokens.copyToken(); + // value string + this.tokens.copyToken(); + this.tokens.appendCode(";"); + } + } + + /** + * Handle an enum member initialized with an expression on the right-hand side (other than a + * string literal). In these cases, we should transform the expression and emit code that sets up + * a reverse mapping. + * + * The TypeScript implementation of this operation distinguishes between expressions that can be + * "constant folded" at compile time (i.e. consist of number literals and simple math operations + * on those numbers) and ones that are dynamic. For constant expressions, it emits the resolved + * numeric value, and auto-incrementing is only allowed in that case. Evaluating expressions at + * compile time would add significant complexity to Sucrase, so Sucrase instead leaves the + * expression as-is, and will later emit something like `MyEnum["previousKey"] + 1` to implement + * auto-incrementing. + * + * This is called after deleting the key token, when the token processor is at the equals sign. + * + * Example 1: + * someKey = 1 + 1 + * -> + * const someKey = 1 + 1; MyEnum[MyEnum["someKey"] = someKey] = "someKey"; + * + * Example 2: + * "some key" = 1 + 1 + * -> + * MyEnum[MyEnum["some key"] = 1 + 1] = "some key"; + */ + processExplicitValueEnumMember( + enumName, + nameStringCode, + variableName, + ) { + const rhsEndIndex = this.tokens.currentToken().rhsEndIndex; + if (rhsEndIndex == null) { + throw new Error("Expected rhsEndIndex on enum assign."); + } + + if (variableName != null) { + this.tokens.appendCode(`const ${variableName}`); + this.tokens.copyToken(); + while (this.tokens.currentIndex() < rhsEndIndex) { + this.rootTransformer.processToken(); + } + this.tokens.appendCode( + `; ${enumName}[${enumName}[${nameStringCode}] = ${variableName}] = ${nameStringCode};`, + ); + } else { + this.tokens.appendCode(`${enumName}[${enumName}[${nameStringCode}]`); + this.tokens.copyToken(); + while (this.tokens.currentIndex() < rhsEndIndex) { + this.rootTransformer.processToken(); + } + this.tokens.appendCode(`] = ${nameStringCode};`); + } + } + + /** + * Handle an enum member with no right-hand side expression. In this case, the value is the + * previous value plus 1, or 0 if there was no previous value. We should also always emit a + * reverse mapping. + * + * Example 1: + * someKey2 + * -> + * const someKey2 = someKey1 + 1; MyEnum[MyEnum["someKey2"] = someKey2] = "someKey2"; + * + * Example 2: + * "some key 2" + * -> + * MyEnum[MyEnum["some key 2"] = someKey1 + 1] = "some key 2"; + */ + processImplicitValueEnumMember( + enumName, + nameStringCode, + variableName, + previousValueCode, + ) { + let valueCode = previousValueCode != null ? `${previousValueCode} + 1` : "0"; + if (variableName != null) { + this.tokens.appendCode(`const ${variableName} = ${valueCode}; `); + valueCode = variableName; + } + this.tokens.appendCode( + `${enumName}[${enumName}[${nameStringCode}] = ${valueCode}] = ${nameStringCode};`, + ); + } +} exports.default = TypeScriptTransformer; Index: frontend/node_modules/sucrase/dist/types/CJSImportProcessor.d.ts =================================================================== --- frontend/node_modules/sucrase/dist/types/CJSImportProcessor.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/types/CJSImportProcessor.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,67 @@ +import type { HelperManager } from "./HelperManager"; +import type { Options } from "./index"; +import type NameManager from "./NameManager"; +import type TokenProcessor from "./TokenProcessor"; +/** + * Class responsible for preprocessing and bookkeeping import and export declarations within the + * file. + * + * TypeScript uses a simpler mechanism that does not use functions like interopRequireDefault and + * interopRequireWildcard, so we also allow that mode for compatibility. + */ +export default class CJSImportProcessor { + readonly nameManager: NameManager; + readonly tokens: TokenProcessor; + readonly enableLegacyTypeScriptModuleInterop: boolean; + readonly options: Options; + readonly isTypeScriptTransformEnabled: boolean; + readonly keepUnusedImports: boolean; + readonly helperManager: HelperManager; + private nonTypeIdentifiers; + private importInfoByPath; + private importsToReplace; + private identifierReplacements; + private exportBindingsByLocalName; + constructor(nameManager: NameManager, tokens: TokenProcessor, enableLegacyTypeScriptModuleInterop: boolean, options: Options, isTypeScriptTransformEnabled: boolean, keepUnusedImports: boolean, helperManager: HelperManager); + preprocessTokens(): void; + /** + * In TypeScript, import statements that only import types should be removed. + * This includes `import {} from 'foo';`, but not `import 'foo';`. + */ + pruneTypeOnlyImports(): void; + shouldAutomaticallyElideImportedName(name: string): boolean; + private generateImportReplacements; + getFreeIdentifierForPath(path: string): string; + private preprocessImportAtIndex; + private preprocessExportAtIndex; + private preprocessVarExportAtIndex; + /** + * Walk this export statement just in case it's an export...from statement. + * If it is, combine it into the import info for that path. Otherwise, just + * bail out; it'll be handled later. + */ + private preprocessNamedExportAtIndex; + private preprocessExportStarAtIndex; + private getNamedImports; + /** + * Get a mutable import info object for this path, creating one if it doesn't + * exist yet. + */ + private getImportInfo; + private addExportBinding; + /** + * Return the code to use for the import for this path, or the empty string if + * the code has already been "claimed" by a previous import. + */ + claimImportCode(importPath: string): string; + getIdentifierReplacement(identifierName: string): string | null; + /** + * Return a string like `exports.foo = exports.bar`. + */ + resolveExportBinding(assignedName: string): string | null; + /** + * Return all imported/exported names where we might be interested in whether usages of those + * names are shadowed. + */ + getGlobalNames(): Set; +} Index: frontend/node_modules/sucrase/dist/types/HelperManager.d.ts =================================================================== --- frontend/node_modules/sucrase/dist/types/HelperManager.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/types/HelperManager.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,15 @@ +import type NameManager from "./NameManager"; +declare const HELPERS: { + [name: string]: string; +}; +export declare class HelperManager { + readonly nameManager: NameManager; + helperNames: { + [baseName in keyof typeof HELPERS]?: string; + }; + createRequireName: string | null; + constructor(nameManager: NameManager); + getHelperName(baseName: keyof typeof HELPERS): string; + emitHelpers(): string; +} +export {}; Index: frontend/node_modules/sucrase/dist/types/NameManager.d.ts =================================================================== --- frontend/node_modules/sucrase/dist/types/NameManager.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/types/NameManager.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,7 @@ +import type { Token } from "./parser/tokenizer"; +export default class NameManager { + private readonly usedNames; + constructor(code: string, tokens: Array); + claimFreeName(name: string): string; + findFreeName(name: string): string; +} Index: frontend/node_modules/sucrase/dist/types/Options-gen-types.d.ts =================================================================== --- frontend/node_modules/sucrase/dist/types/Options-gen-types.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/types/Options-gen-types.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,9 @@ +/** + * This module was automatically generated by `ts-interface-builder` + */ +import * as t from "ts-interface-checker"; +export declare const Transform: t.TUnion; +export declare const SourceMapOptions: t.TIface; +export declare const Options: t.TIface; +declare const exportedTypeSuite: t.ITypeSuite; +export default exportedTypeSuite; Index: frontend/node_modules/sucrase/dist/types/Options.d.ts =================================================================== --- frontend/node_modules/sucrase/dist/types/Options.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/types/Options.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,90 @@ +export type Transform = "jsx" | "typescript" | "flow" | "imports" | "react-hot-loader" | "jest"; +export interface SourceMapOptions { + /** + * The name to use in the "file" field of the source map. This should be the name of the compiled + * file. + */ + compiledFilename: string; +} +export interface Options { + /** + * Unordered array of transform names describing both the allowed syntax + * (where applicable) and the transformation behavior. + */ + transforms: Array; + /** + * Opts out of all ES syntax transformations: optional chaining, nullish + * coalescing, class fields, numeric separators, optional catch binding. + */ + disableESTransforms?: boolean; + /** + * Transformation mode for the JSX transform. + * - "classic" refers to the original behavior using `React.createElement`. + * - "automatic" refers to the transform behavior released with React 17, + * where the `jsx` function (or a variation) is automatically imported. + * - "preserve" leaves the JSX as-is. + * + * Default value: "classic". + */ + jsxRuntime?: "classic" | "automatic" | "preserve"; + /** + * Compile code for production use. Currently only applies to the JSX + * transform. + */ + production?: boolean; + /** + * If specified, import path prefix to use in place of "react" when compiling + * JSX with the automatic runtime. + */ + jsxImportSource?: string; + /** + * If specified, function name to use in place of React.createClass when + * compiling JSX with the classic runtime. + */ + jsxPragma?: string; + /** + * If specified, function name to use in place of React.Fragment when + * compiling JSX with the classic runtime. + */ + jsxFragmentPragma?: string; + /** + * If specified, disable automatic removal of type-only import and export + * statements and names. Only statements and names that explicitly use the + * `type` keyword are removed. + */ + keepUnusedImports?: boolean; + /** + * If specified, the imports transform does not attempt to change dynamic + * import() expressions into require() calls. + */ + preserveDynamicImport?: boolean; + /** + * Only relevant when targeting ESM (i.e. when the imports transform is *not* + * specified). This flag changes the behavior of TS require imports: + * + * import Foo = require("foo"); + * + * to import createRequire, create a require function, and use that function. + * This is the TS behavior with module: nodenext and makes it easier for the + * same code to target ESM and CJS. + */ + injectCreateRequireForImportRequire?: boolean; + /** + * If true, replicate the import behavior of TypeScript's esModuleInterop: false. + */ + enableLegacyTypeScriptModuleInterop?: boolean; + /** + * If true, replicate the import behavior Babel 5 and babel-plugin-add-module-exports. + */ + enableLegacyBabel5ModuleInterop?: boolean; + /** + * If specified, we also return a RawSourceMap object alongside the code. + * filePath must be specified if this option is enabled. + */ + sourceMapOptions?: SourceMapOptions; + /** + * File path to use in error messages, React display names, and source maps. + */ + filePath?: string; +} +export declare function validateOptions(options: Options): void; Index: frontend/node_modules/sucrase/dist/types/TokenProcessor.d.ts =================================================================== --- frontend/node_modules/sucrase/dist/types/TokenProcessor.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/types/TokenProcessor.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,87 @@ +import type { HelperManager } from "./HelperManager"; +import type { Token } from "./parser/tokenizer"; +import type { ContextualKeyword } from "./parser/tokenizer/keywords"; +import { type TokenType } from "./parser/tokenizer/types"; +export interface TokenProcessorSnapshot { + resultCode: string; + tokenIndex: number; +} +export interface TokenProcessorResult { + code: string; + mappings: Array; +} +export default class TokenProcessor { + readonly code: string; + readonly tokens: Array; + readonly isFlowEnabled: boolean; + readonly disableESTransforms: boolean; + readonly helperManager: HelperManager; + private resultCode; + private resultMappings; + private tokenIndex; + constructor(code: string, tokens: Array, isFlowEnabled: boolean, disableESTransforms: boolean, helperManager: HelperManager); + /** + * Snapshot the token state in a way that can be restored later, useful for + * things like lookahead. + * + * resultMappings do not need to be copied since in all use cases, they will + * be overwritten anyway after restore. + */ + snapshot(): TokenProcessorSnapshot; + restoreToSnapshot(snapshot: TokenProcessorSnapshot): void; + /** + * Remove and return the code generated since the snapshot, leaving the + * current token position in-place. Unlike most TokenProcessor operations, + * this operation can result in input/output line number mismatches because + * the removed code may contain newlines, so this operation should be used + * sparingly. + */ + dangerouslyGetAndRemoveCodeSinceSnapshot(snapshot: TokenProcessorSnapshot): string; + reset(): void; + matchesContextualAtIndex(index: number, contextualKeyword: ContextualKeyword): boolean; + identifierNameAtIndex(index: number): string; + identifierNameAtRelativeIndex(relativeIndex: number): string; + identifierName(): string; + identifierNameForToken(token: Token): string; + rawCodeForToken(token: Token): string; + stringValueAtIndex(index: number): string; + stringValue(): string; + stringValueForToken(token: Token): string; + matches1AtIndex(index: number, t1: TokenType): boolean; + matches2AtIndex(index: number, t1: TokenType, t2: TokenType): boolean; + matches3AtIndex(index: number, t1: TokenType, t2: TokenType, t3: TokenType): boolean; + matches1(t1: TokenType): boolean; + matches2(t1: TokenType, t2: TokenType): boolean; + matches3(t1: TokenType, t2: TokenType, t3: TokenType): boolean; + matches4(t1: TokenType, t2: TokenType, t3: TokenType, t4: TokenType): boolean; + matches5(t1: TokenType, t2: TokenType, t3: TokenType, t4: TokenType, t5: TokenType): boolean; + matchesContextual(contextualKeyword: ContextualKeyword): boolean; + matchesContextIdAndLabel(type: TokenType, contextId: number): boolean; + previousWhitespaceAndComments(): string; + replaceToken(newCode: string): void; + replaceTokenTrimmingLeftWhitespace(newCode: string): void; + removeInitialToken(): void; + removeToken(): void; + /** + * Remove all code until the next }, accounting for balanced braces. + */ + removeBalancedCode(): void; + copyExpectedToken(tokenType: TokenType): void; + copyToken(): void; + copyTokenWithPrefix(prefix: string): void; + private appendTokenPrefix; + private appendTokenSuffix; + appendCode(code: string): void; + currentToken(): Token; + currentTokenCode(): string; + tokenAtRelativeIndex(relativeIndex: number): Token; + currentIndex(): number; + /** + * Move to the next token. Only suitable in preprocessing steps. When + * generating new code, you should use copyToken or removeToken. + */ + nextToken(): void; + previousToken(): void; + finish(): TokenProcessorResult; + isAtEnd(): boolean; +} Index: frontend/node_modules/sucrase/dist/types/cli.d.ts =================================================================== --- frontend/node_modules/sucrase/dist/types/cli.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/types/cli.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,1 @@ +export default function run(): void; Index: frontend/node_modules/sucrase/dist/types/computeSourceMap.d.ts =================================================================== --- frontend/node_modules/sucrase/dist/types/computeSourceMap.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/types/computeSourceMap.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,17 @@ +import type { SourceMapOptions } from "./index"; +import type { Token } from "./parser/tokenizer"; +import type { RootTransformerResult } from "./transformers/RootTransformer"; +export interface RawSourceMap { + version: number; + file: string; + sources: Array; + sourceRoot?: string; + sourcesContent?: Array; + mappings: string; + names: Array; +} +/** + * Generate a source map indicating that each line maps directly to the original line, + * with the tokens in their new positions. + */ +export default function computeSourceMap({ code: generatedCode, mappings: rawMappings }: RootTransformerResult, filePath: string, options: SourceMapOptions, source: string, tokens: Array): RawSourceMap; Index: frontend/node_modules/sucrase/dist/types/identifyShadowedGlobals.d.ts =================================================================== --- frontend/node_modules/sucrase/dist/types/identifyShadowedGlobals.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/types/identifyShadowedGlobals.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,12 @@ +import type { Scope } from "./parser/tokenizer/state"; +import type TokenProcessor from "./TokenProcessor"; +/** + * Traverse the given tokens and modify them if necessary to indicate that some names shadow global + * variables. + */ +export default function identifyShadowedGlobals(tokens: TokenProcessor, scopes: Array, globalNames: Set): void; +/** + * We can do a fast up-front check to see if there are any declarations to global names. If not, + * then there's no point in computing scope assignments. + */ +export declare function hasShadowedGlobals(tokens: TokenProcessor, globalNames: Set): boolean; Index: frontend/node_modules/sucrase/dist/types/index.d.ts =================================================================== --- frontend/node_modules/sucrase/dist/types/index.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/types/index.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,26 @@ +import CJSImportProcessor from "./CJSImportProcessor"; +import { type RawSourceMap } from "./computeSourceMap"; +import { HelperManager } from "./HelperManager"; +import NameManager from "./NameManager"; +import type { Options, SourceMapOptions, Transform } from "./Options"; +import type { Scope } from "./parser/tokenizer/state"; +import TokenProcessor from "./TokenProcessor"; +export interface TransformResult { + code: string; + sourceMap?: RawSourceMap; +} +export interface SucraseContext { + tokenProcessor: TokenProcessor; + scopes: Array; + nameManager: NameManager; + importProcessor: CJSImportProcessor | null; + helperManager: HelperManager; +} +export type { Options, SourceMapOptions, Transform }; +export declare function getVersion(): string; +export declare function transform(code: string, options: Options): TransformResult; +/** + * Return a string representation of the sucrase tokens, mostly useful for + * diagnostic purposes. + */ +export declare function getFormattedTokens(code: string, options: Options): string; Index: frontend/node_modules/sucrase/dist/types/parser/index.d.ts =================================================================== --- frontend/node_modules/sucrase/dist/types/parser/index.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/types/parser/index.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,8 @@ +import type { Token } from "./tokenizer/index"; +import type { Scope } from "./tokenizer/state"; +export declare class File { + tokens: Array; + scopes: Array; + constructor(tokens: Array, scopes: Array); +} +export declare function parse(input: string, isJSXEnabled: boolean, isTypeScriptEnabled: boolean, isFlowEnabled: boolean): File; Index: frontend/node_modules/sucrase/dist/types/parser/plugins/flow.d.ts =================================================================== --- frontend/node_modules/sucrase/dist/types/parser/plugins/flow.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/types/parser/plugins/flow.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,27 @@ +import { ContextualKeyword } from "../tokenizer/keywords"; +import { type StopState } from "../traverser/expression"; +export declare function flowParseTypeParameterDeclaration(): void; +export declare function flowParseTypeAnnotation(): void; +export declare function flowParseVariance(): void; +export declare function flowParseFunctionBodyAndFinish(funcContextId: number): void; +export declare function flowParseSubscript(startTokenIndex: number, noCalls: boolean, stopState: StopState): void; +export declare function flowStartParseNewArguments(): void; +export declare function flowTryParseStatement(): boolean; +export declare function flowTryParseExportDefaultExpression(): boolean; +export declare function flowParseIdentifierStatement(contextualKeyword: ContextualKeyword): void; +export declare function flowShouldParseExportDeclaration(): boolean; +export declare function flowShouldDisallowExportDefaultSpecifier(): boolean; +export declare function flowParseExportDeclaration(): void; +export declare function flowShouldParseExportStar(): boolean; +export declare function flowParseExportStar(): void; +export declare function flowAfterParseClassSuper(hasSuper: boolean): void; +export declare function flowStartParseObjPropValue(): void; +export declare function flowParseAssignableListItemTypes(): void; +export declare function flowStartParseImportSpecifiers(): void; +export declare function flowParseImportSpecifier(): void; +export declare function flowStartParseFunctionParams(): void; +export declare function flowAfterParseVarHead(): void; +export declare function flowStartParseAsyncArrowFromCallExpression(): void; +export declare function flowParseMaybeAssign(noIn: boolean, isWithinParens: boolean): boolean; +export declare function flowParseArrow(): boolean; +export declare function flowParseSubscripts(startTokenIndex: number, noCalls?: boolean): void; Index: frontend/node_modules/sucrase/dist/types/parser/plugins/jsx/index.d.ts =================================================================== --- frontend/node_modules/sucrase/dist/types/parser/plugins/jsx/index.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/types/parser/plugins/jsx/index.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,2 @@ +export declare function jsxParseElement(): void; +export declare function nextJSXTagToken(): void; Index: frontend/node_modules/sucrase/dist/types/parser/plugins/jsx/xhtml.d.ts =================================================================== --- frontend/node_modules/sucrase/dist/types/parser/plugins/jsx/xhtml.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/types/parser/plugins/jsx/xhtml.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,2 @@ +declare const _default: Map; +export default _default; Index: frontend/node_modules/sucrase/dist/types/parser/plugins/types.d.ts =================================================================== --- frontend/node_modules/sucrase/dist/types/parser/plugins/types.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/types/parser/plugins/types.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,5 @@ +/** + * Common parser code for TypeScript and Flow. + */ +export declare function typedParseConditional(noIn: boolean): void; +export declare function typedParseParenItem(): void; Index: frontend/node_modules/sucrase/dist/types/parser/plugins/typescript.d.ts =================================================================== --- frontend/node_modules/sucrase/dist/types/parser/plugins/typescript.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/types/parser/plugins/typescript.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,49 @@ +import { ContextualKeyword } from "../tokenizer/keywords"; +import { type StopState } from "../traverser/expression"; +export declare function tsParseModifiers(allowedModifiers: Array): void; +/** Parses a modifier matching one the given modifier names. */ +export declare function tsParseModifier(allowedModifiers: Array): ContextualKeyword | null; +export declare function tsTryParseTypeParameters(): void; +export declare function tsTryParseTypeAnnotation(): void; +export declare function tsParseTypeAnnotation(): void; +export declare function tsParseType(): void; +export declare function tsParseNonConditionalType(): void; +export declare function tsParseTypeAssertion(): void; +export declare function tsTryParseJSXTypeArgument(): void; +export declare function tsParseImportEqualsDeclaration(): void; +export declare function tsIsDeclarationStart(): boolean; +export declare function tsParseFunctionBodyAndFinish(functionStart: number, funcContextId: number): void; +export declare function tsParseSubscript(startTokenIndex: number, noCalls: boolean, stopState: StopState): void; +export declare function tsTryParseExport(): boolean; +/** + * Parse a TS import specifier, which may be prefixed with "type" and may be of + * the form `foo as bar`. + * + * The number of identifier-like tokens we see happens to be enough to uniquely + * identify the form, so simply count the number of identifiers rather than + * matching the words `type` or `as`. This is particularly important because + * `type` and `as` could each actually be plain identifiers rather than + * keywords. + */ +export declare function tsParseImportSpecifier(): void; +/** + * Just like named import specifiers, export specifiers can have from 1 to 4 + * tokens, inclusive, and the number of tokens determines the role of each token. + */ +export declare function tsParseExportSpecifier(): void; +export declare function tsTryParseExportDefaultExpression(): boolean; +export declare function tsTryParseStatementContent(): boolean; +export declare function tsTryParseClassMemberWithIsStatic(isStatic: boolean): boolean; +export declare function tsParseIdentifierStatement(contextualKeyword: ContextualKeyword): void; +export declare function tsParseExportDeclaration(): void; +export declare function tsAfterParseClassSuper(hasSuper: boolean): void; +export declare function tsStartParseObjPropValue(): void; +export declare function tsStartParseFunctionParams(): void; +export declare function tsAfterParseVarHead(): void; +export declare function tsStartParseAsyncArrowFromCallExpression(): void; +export declare function tsParseMaybeAssign(noIn: boolean, isWithinParens: boolean): boolean; +export declare function tsParseMaybeAssignWithJSX(noIn: boolean, isWithinParens: boolean): boolean; +export declare function tsParseMaybeAssignWithoutJSX(noIn: boolean, isWithinParens: boolean): boolean; +export declare function tsParseArrow(): boolean; +export declare function tsParseAssignableListItemTypes(): void; +export declare function tsParseMaybeDecoratorArguments(): void; Index: frontend/node_modules/sucrase/dist/types/parser/tokenizer/index.d.ts =================================================================== --- frontend/node_modules/sucrase/dist/types/parser/tokenizer/index.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/types/parser/tokenizer/index.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,93 @@ +import { ContextualKeyword } from "./keywords"; +import { type TokenType } from "./types"; +export declare enum IdentifierRole { + Access = 0, + ExportAccess = 1, + TopLevelDeclaration = 2, + FunctionScopedDeclaration = 3, + BlockScopedDeclaration = 4, + ObjectShorthandTopLevelDeclaration = 5, + ObjectShorthandFunctionScopedDeclaration = 6, + ObjectShorthandBlockScopedDeclaration = 7, + ObjectShorthand = 8, + ImportDeclaration = 9, + ObjectKey = 10, + ImportAccess = 11 +} +/** + * Extra information on jsxTagStart tokens, used to determine which of the three + * jsx functions are called in the automatic transform. + */ +export declare enum JSXRole { + NoChildren = 0, + OneChild = 1, + StaticChildren = 2, + KeyAfterPropSpread = 3 +} +export declare function isDeclaration(token: Token): boolean; +export declare function isNonTopLevelDeclaration(token: Token): boolean; +export declare function isTopLevelDeclaration(token: Token): boolean; +export declare function isBlockScopedDeclaration(token: Token): boolean; +export declare function isFunctionScopedDeclaration(token: Token): boolean; +export declare function isObjectShorthandDeclaration(token: Token): boolean; +export declare class Token { + constructor(); + type: TokenType; + contextualKeyword: ContextualKeyword; + start: number; + end: number; + scopeDepth: number; + isType: boolean; + identifierRole: IdentifierRole | null; + jsxRole: JSXRole | null; + shadowsGlobal: boolean; + isAsyncOperation: boolean; + contextId: number | null; + rhsEndIndex: number | null; + isExpression: boolean; + numNullishCoalesceStarts: number; + numNullishCoalesceEnds: number; + isOptionalChainStart: boolean; + isOptionalChainEnd: boolean; + subscriptStartIndex: number | null; + nullishStartIndex: number | null; +} +export declare function next(): void; +export declare function nextTemplateToken(): void; +export declare function retokenizeSlashAsRegex(): void; +export declare function pushTypeContext(existingTokensInType: number): boolean; +export declare function popTypeContext(oldIsType: boolean): void; +export declare function eat(type: TokenType): boolean; +export declare function eatTypeToken(tokenType: TokenType): void; +export declare function match(type: TokenType): boolean; +export declare function lookaheadType(): TokenType; +export declare class TypeAndKeyword { + type: TokenType; + contextualKeyword: ContextualKeyword; + constructor(type: TokenType, contextualKeyword: ContextualKeyword); +} +export declare function lookaheadTypeAndKeyword(): TypeAndKeyword; +export declare function nextTokenStart(): number; +export declare function nextTokenStartSince(pos: number): number; +export declare function lookaheadCharCode(): number; +export declare function nextToken(): void; +export declare function skipLineComment(startSkip: number): void; +export declare function skipSpace(): void; +export declare function finishToken(type: TokenType, contextualKeyword?: ContextualKeyword): void; +/** + * Reinterpret a possible > token when transitioning from a type to a non-type + * context. + * + * This comes up in two situations where >= needs to be treated as one token: + * - After an `as` expression, like in the code `a as T >= 1`. + * - In a type argument in an expression context, e.g. `f(a < b, c >= d)`, we + * need to see the token as >= so that we get an error and backtrack to + * normal expression parsing. + * + * Other situations require >= to be seen as two tokens, e.g. + * `const x: Array=[];`, so it's important to treat > as its own token in + * typical type parsing situations. + */ +export declare function rescan_gt(): void; +export declare function getTokenFromCode(code: number): void; +export declare function skipWord(): void; Index: frontend/node_modules/sucrase/dist/types/parser/tokenizer/keywords.d.ts =================================================================== --- frontend/node_modules/sucrase/dist/types/parser/tokenizer/keywords.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/types/parser/tokenizer/keywords.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,43 @@ +export declare enum ContextualKeyword { + NONE = 0, + _abstract = 1, + _accessor = 2, + _as = 3, + _assert = 4, + _asserts = 5, + _async = 6, + _await = 7, + _checks = 8, + _constructor = 9, + _declare = 10, + _enum = 11, + _exports = 12, + _from = 13, + _get = 14, + _global = 15, + _implements = 16, + _infer = 17, + _interface = 18, + _is = 19, + _keyof = 20, + _mixins = 21, + _module = 22, + _namespace = 23, + _of = 24, + _opaque = 25, + _out = 26, + _override = 27, + _private = 28, + _protected = 29, + _proto = 30, + _public = 31, + _readonly = 32, + _require = 33, + _satisfies = 34, + _set = 35, + _static = 36, + _symbol = 37, + _type = 38, + _unique = 39, + _using = 40 +} Index: frontend/node_modules/sucrase/dist/types/parser/tokenizer/readWord.d.ts =================================================================== --- frontend/node_modules/sucrase/dist/types/parser/tokenizer/readWord.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/types/parser/tokenizer/readWord.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,7 @@ +/** + * Read an identifier, producing either a name token or matching on one of the existing keywords. + * For performance, we pre-generate big decision tree that we traverse. Each node represents a + * prefix and has 27 values, where the first value is the token or contextual token, if any (-1 if + * not), and the other 26 values are the transitions to other nodes, or -1 to stop. + */ +export default function readWord(): void; Index: frontend/node_modules/sucrase/dist/types/parser/tokenizer/readWordTree.d.ts =================================================================== --- frontend/node_modules/sucrase/dist/types/parser/tokenizer/readWordTree.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/types/parser/tokenizer/readWordTree.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,1 @@ +export declare const READ_WORD_TREE: Int32Array; Index: frontend/node_modules/sucrase/dist/types/parser/tokenizer/state.d.ts =================================================================== --- frontend/node_modules/sucrase/dist/types/parser/tokenizer/state.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/types/parser/tokenizer/state.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,50 @@ +import type { Token } from "./index"; +import { ContextualKeyword } from "./keywords"; +import { type TokenType } from "./types"; +export declare class Scope { + startTokenIndex: number; + endTokenIndex: number; + isFunctionScope: boolean; + constructor(startTokenIndex: number, endTokenIndex: number, isFunctionScope: boolean); +} +export declare class StateSnapshot { + readonly potentialArrowAt: number; + readonly noAnonFunctionType: boolean; + readonly inDisallowConditionalTypesContext: boolean; + readonly tokensLength: number; + readonly scopesLength: number; + readonly pos: number; + readonly type: TokenType; + readonly contextualKeyword: ContextualKeyword; + readonly start: number; + readonly end: number; + readonly isType: boolean; + readonly scopeDepth: number; + readonly error: Error | null; + constructor(potentialArrowAt: number, noAnonFunctionType: boolean, inDisallowConditionalTypesContext: boolean, tokensLength: number, scopesLength: number, pos: number, type: TokenType, contextualKeyword: ContextualKeyword, start: number, end: number, isType: boolean, scopeDepth: number, error: Error | null); +} +export default class State { + potentialArrowAt: number; + noAnonFunctionType: boolean; + inDisallowConditionalTypesContext: boolean; + tokens: Array; + scopes: Array; + pos: number; + type: TokenType; + contextualKeyword: ContextualKeyword; + start: number; + end: number; + isType: boolean; + scopeDepth: number; + /** + * If the parser is in an error state, then the token is always tt.eof and all functions can + * keep executing but should be written so they don't get into an infinite loop in this situation. + * + * This approach, combined with the ability to snapshot and restore state, allows us to implement + * backtracking without exceptions and without needing to explicitly propagate error states + * everywhere. + */ + error: Error | null; + snapshot(): StateSnapshot; + restoreFromSnapshot(snapshot: StateSnapshot): void; +} Index: frontend/node_modules/sucrase/dist/types/parser/tokenizer/types.d.ts =================================================================== --- frontend/node_modules/sucrase/dist/types/parser/tokenizer/types.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/types/parser/tokenizer/types.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,126 @@ +/** + * Enum of all token types, with bit fields to signify meaningful properties. + */ +export declare enum TokenType { + PRECEDENCE_MASK = 15, + IS_KEYWORD = 16, + IS_ASSIGN = 32, + IS_RIGHT_ASSOCIATIVE = 64, + IS_PREFIX = 128, + IS_POSTFIX = 256, + IS_EXPRESSION_START = 512, + num = 512, + bigint = 1536, + decimal = 2560, + regexp = 3584, + string = 4608, + name = 5632, + eof = 6144, + bracketL = 7680, + bracketR = 8192, + braceL = 9728, + braceBarL = 10752, + braceR = 11264, + braceBarR = 12288, + parenL = 13824, + parenR = 14336, + comma = 15360, + semi = 16384, + colon = 17408, + doubleColon = 18432, + dot = 19456, + question = 20480, + questionDot = 21504, + arrow = 22528, + template = 23552, + ellipsis = 24576, + backQuote = 25600, + dollarBraceL = 27136, + at = 27648, + hash = 29184, + eq = 29728, + assign = 30752, + preIncDec = 32640, + postIncDec = 33664, + bang = 34432, + tilde = 35456, + pipeline = 35841, + nullishCoalescing = 36866, + logicalOR = 37890, + logicalAND = 38915, + bitwiseOR = 39940, + bitwiseXOR = 40965, + bitwiseAND = 41990, + equality = 43015, + lessThan = 44040, + greaterThan = 45064, + relationalOrEqual = 46088, + bitShiftL = 47113, + bitShiftR = 48137, + plus = 49802, + minus = 50826, + modulo = 51723, + star = 52235, + slash = 53259, + exponent = 54348, + jsxName = 55296, + jsxText = 56320, + jsxEmptyText = 57344, + jsxTagStart = 58880, + jsxTagEnd = 59392, + typeParameterStart = 60928, + nonNullAssertion = 61440, + _break = 62480, + _case = 63504, + _catch = 64528, + _continue = 65552, + _debugger = 66576, + _default = 67600, + _do = 68624, + _else = 69648, + _finally = 70672, + _for = 71696, + _function = 73232, + _if = 73744, + _return = 74768, + _switch = 75792, + _throw = 77456, + _try = 77840, + _var = 78864, + _let = 79888, + _const = 80912, + _while = 81936, + _with = 82960, + _new = 84496, + _this = 85520, + _super = 86544, + _class = 87568, + _extends = 88080, + _export = 89104, + _import = 90640, + _yield = 91664, + _null = 92688, + _true = 93712, + _false = 94736, + _in = 95256, + _instanceof = 96280, + _typeof = 97936, + _void = 98960, + _delete = 99984, + _async = 100880, + _get = 101904, + _set = 102928, + _declare = 103952, + _readonly = 104976, + _abstract = 106000, + _static = 107024, + _public = 107536, + _private = 108560, + _protected = 109584, + _override = 110608, + _as = 112144, + _enum = 113168, + _type = 114192, + _implements = 115216 +} +export declare function formatTokenType(tokenType: TokenType): string; Index: frontend/node_modules/sucrase/dist/types/parser/traverser/base.d.ts =================================================================== --- frontend/node_modules/sucrase/dist/types/parser/traverser/base.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/types/parser/traverser/base.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,16 @@ +import State from "../tokenizer/state"; +export declare let isJSXEnabled: boolean; +export declare let isTypeScriptEnabled: boolean; +export declare let isFlowEnabled: boolean; +export declare let state: State; +export declare let input: string; +export declare let nextContextId: number; +export declare function getNextContextId(): number; +export declare function augmentError(error: any): any; +export declare class Loc { + line: number; + column: number; + constructor(line: number, column: number); +} +export declare function locationForIndex(pos: number): Loc; +export declare function initParser(inputCode: string, isJSXEnabledArg: boolean, isTypeScriptEnabledArg: boolean, isFlowEnabledArg: boolean): void; Index: frontend/node_modules/sucrase/dist/types/parser/traverser/expression.d.ts =================================================================== --- frontend/node_modules/sucrase/dist/types/parser/traverser/expression.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/types/parser/traverser/expression.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,34 @@ +export declare class StopState { + stop: boolean; + constructor(stop: boolean); +} +export declare function parseExpression(noIn?: boolean): void; +/** + * noIn is used when parsing a for loop so that we don't interpret a following "in" as the binary + * operatior. + * isWithinParens is used to indicate that we're parsing something that might be a comma expression + * or might be an arrow function or might be a Flow type assertion (which requires explicit parens). + * In these cases, we should allow : and ?: after the initial "left" part. + */ +export declare function parseMaybeAssign(noIn?: boolean, isWithinParens?: boolean): boolean; +export declare function baseParseMaybeAssign(noIn: boolean, isWithinParens: boolean): boolean; +export declare function baseParseConditional(noIn: boolean): void; +export declare function parseMaybeUnary(): boolean; +export declare function parseExprSubscripts(): boolean; +export declare function baseParseSubscripts(startTokenIndex: number, noCalls?: boolean): void; +/** Set 'state.stop = true' to indicate that we should stop parsing subscripts. */ +export declare function baseParseSubscript(startTokenIndex: number, noCalls: boolean, stopState: StopState): void; +export declare function atPossibleAsync(): boolean; +export declare function parseCallExpressionArguments(): void; +export declare function parseExprAtom(): boolean; +export declare function parseLiteral(): void; +export declare function parseParenExpression(): void; +export declare function parseArrow(): boolean; +export declare function parseTemplate(): void; +export declare function parseObj(isPattern: boolean, isBlockScope: boolean): void; +export declare function parsePropertyName(objectContextId: number): void; +export declare function parseMethod(functionStart: number, isConstructor: boolean): void; +export declare function parseArrowExpression(startTokenIndex: number): void; +export declare function parseFunctionBodyAndFinish(functionStart: number, funcContextId?: number): void; +export declare function parseFunctionBody(allowExpression: boolean, funcContextId?: number): void; +export declare function parseIdentifier(): void; Index: frontend/node_modules/sucrase/dist/types/parser/traverser/index.d.ts =================================================================== --- frontend/node_modules/sucrase/dist/types/parser/traverser/index.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/types/parser/traverser/index.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,2 @@ +import type { File } from "../index"; +export declare function parseFile(): File; Index: frontend/node_modules/sucrase/dist/types/parser/traverser/lval.d.ts =================================================================== --- frontend/node_modules/sucrase/dist/types/parser/traverser/lval.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/types/parser/traverser/lval.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,9 @@ +import { TokenType } from "../tokenizer/types"; +export declare function parseSpread(): void; +export declare function parseRest(isBlockScope: boolean): void; +export declare function parseBindingIdentifier(isBlockScope: boolean): void; +export declare function parseImportedIdentifier(): void; +export declare function markPriorBindingIdentifier(isBlockScope: boolean): void; +export declare function parseBindingAtom(isBlockScope: boolean): void; +export declare function parseBindingList(close: TokenType, isBlockScope: boolean, allowEmpty?: boolean, allowModifiers?: boolean, contextId?: number): void; +export declare function parseMaybeDefault(isBlockScope: boolean, leftAlreadyParsed?: boolean): void; Index: frontend/node_modules/sucrase/dist/types/parser/traverser/statement.d.ts =================================================================== --- frontend/node_modules/sucrase/dist/types/parser/traverser/statement.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/types/parser/traverser/statement.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,20 @@ +import { File } from "../index"; +import { type TokenType } from "../tokenizer/types"; +export declare function parseTopLevel(): File; +export declare function parseStatement(declaration: boolean): void; +export declare function parseDecorators(): void; +export declare function baseParseMaybeDecoratorArguments(): void; +export declare function parseVarStatement(isBlockScope: boolean): void; +export declare function parseBlock(isFunctionScope?: boolean, contextId?: number): void; +export declare function parseBlockBody(end: TokenType): void; +export declare function parseFunction(functionStart: number, isStatement: boolean, optionalId?: boolean): void; +export declare function parseFunctionParams(allowModifiers?: boolean, funcContextId?: number): void; +export declare function parseClass(isStatement: boolean, optionalId?: boolean): void; +export declare function parseClassPropertyName(classContextId: number): void; +export declare function parsePostMemberNameModifiers(): void; +export declare function parseClassProperty(): void; +export declare function parseExport(): void; +export declare function parseExportFrom(): void; +export declare function baseParseExportStar(): void; +export declare function parseExportSpecifiers(): void; +export declare function parseImport(): void; Index: frontend/node_modules/sucrase/dist/types/parser/traverser/util.d.ts =================================================================== --- frontend/node_modules/sucrase/dist/types/parser/traverser/util.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/types/parser/traverser/util.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,17 @@ +import type { ContextualKeyword } from "../tokenizer/keywords"; +import { type TokenType } from "../tokenizer/types"; +export declare function isContextual(contextualKeyword: ContextualKeyword): boolean; +export declare function isLookaheadContextual(contextualKeyword: ContextualKeyword): boolean; +export declare function eatContextual(contextualKeyword: ContextualKeyword): boolean; +export declare function expectContextual(contextualKeyword: ContextualKeyword): void; +export declare function canInsertSemicolon(): boolean; +export declare function hasPrecedingLineBreak(): boolean; +export declare function hasFollowingLineBreak(): boolean; +export declare function isLineTerminator(): boolean; +export declare function semicolon(): void; +export declare function expect(type: TokenType): void; +/** + * Transition the parser to an error state. All code needs to be written to naturally unwind in this + * state, which allows us to backtrack without exceptions and without error plumbing everywhere. + */ +export declare function unexpected(message?: string, pos?: number): void; Index: frontend/node_modules/sucrase/dist/types/parser/util/charcodes.d.ts =================================================================== --- frontend/node_modules/sucrase/dist/types/parser/util/charcodes.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/types/parser/util/charcodes.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,107 @@ +export declare enum charCodes { + backSpace = 8, + lineFeed = 10, + tab = 9, + carriageReturn = 13, + shiftOut = 14, + space = 32, + exclamationMark = 33, + quotationMark = 34, + numberSign = 35, + dollarSign = 36, + percentSign = 37, + ampersand = 38, + apostrophe = 39, + leftParenthesis = 40, + rightParenthesis = 41, + asterisk = 42, + plusSign = 43, + comma = 44, + dash = 45, + dot = 46, + slash = 47, + digit0 = 48, + digit1 = 49, + digit2 = 50, + digit3 = 51, + digit4 = 52, + digit5 = 53, + digit6 = 54, + digit7 = 55, + digit8 = 56, + digit9 = 57, + colon = 58, + semicolon = 59, + lessThan = 60, + equalsTo = 61, + greaterThan = 62, + questionMark = 63, + atSign = 64, + uppercaseA = 65, + uppercaseB = 66, + uppercaseC = 67, + uppercaseD = 68, + uppercaseE = 69, + uppercaseF = 70, + uppercaseG = 71, + uppercaseH = 72, + uppercaseI = 73, + uppercaseJ = 74, + uppercaseK = 75, + uppercaseL = 76, + uppercaseM = 77, + uppercaseN = 78, + uppercaseO = 79, + uppercaseP = 80, + uppercaseQ = 81, + uppercaseR = 82, + uppercaseS = 83, + uppercaseT = 84, + uppercaseU = 85, + uppercaseV = 86, + uppercaseW = 87, + uppercaseX = 88, + uppercaseY = 89, + uppercaseZ = 90, + leftSquareBracket = 91, + backslash = 92, + rightSquareBracket = 93, + caret = 94, + underscore = 95, + graveAccent = 96, + lowercaseA = 97, + lowercaseB = 98, + lowercaseC = 99, + lowercaseD = 100, + lowercaseE = 101, + lowercaseF = 102, + lowercaseG = 103, + lowercaseH = 104, + lowercaseI = 105, + lowercaseJ = 106, + lowercaseK = 107, + lowercaseL = 108, + lowercaseM = 109, + lowercaseN = 110, + lowercaseO = 111, + lowercaseP = 112, + lowercaseQ = 113, + lowercaseR = 114, + lowercaseS = 115, + lowercaseT = 116, + lowercaseU = 117, + lowercaseV = 118, + lowercaseW = 119, + lowercaseX = 120, + lowercaseY = 121, + lowercaseZ = 122, + leftCurlyBrace = 123, + verticalBar = 124, + rightCurlyBrace = 125, + tilde = 126, + nonBreakingSpace = 160, + oghamSpaceMark = 5760, + lineSeparator = 8232, + paragraphSeparator = 8233 +} +export declare function isDigit(code: number): boolean; Index: frontend/node_modules/sucrase/dist/types/parser/util/identifier.d.ts =================================================================== --- frontend/node_modules/sucrase/dist/types/parser/util/identifier.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/types/parser/util/identifier.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,2 @@ +export declare const IS_IDENTIFIER_CHAR: Uint8Array; +export declare const IS_IDENTIFIER_START: Uint8Array; Index: frontend/node_modules/sucrase/dist/types/parser/util/whitespace.d.ts =================================================================== --- frontend/node_modules/sucrase/dist/types/parser/util/whitespace.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/types/parser/util/whitespace.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,3 @@ +export declare const WHITESPACE_CHARS: Array; +export declare const skipWhiteSpace: RegExp; +export declare const IS_WHITESPACE: Uint8Array; Index: frontend/node_modules/sucrase/dist/types/register.d.ts =================================================================== --- frontend/node_modules/sucrase/dist/types/register.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/types/register.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,14 @@ +import { type Options } from "./index"; +export interface HookOptions { + matcher?: (code: string) => boolean; + ignoreNodeModules?: boolean; +} +export type RevertFunction = () => void; +export declare function addHook(extension: string, sucraseOptions: Options, hookOptions?: HookOptions): RevertFunction; +export declare function registerJS(hookOptions?: HookOptions): RevertFunction; +export declare function registerJSX(hookOptions?: HookOptions): RevertFunction; +export declare function registerTS(hookOptions?: HookOptions): RevertFunction; +export declare function registerTSX(hookOptions?: HookOptions): RevertFunction; +export declare function registerTSLegacyModuleInterop(hookOptions?: HookOptions): RevertFunction; +export declare function registerTSXLegacyModuleInterop(hookOptions?: HookOptions): RevertFunction; +export declare function registerAll(hookOptions?: HookOptions): RevertFunction; Index: frontend/node_modules/sucrase/dist/types/transformers/CJSImportTransformer.d.ts =================================================================== --- frontend/node_modules/sucrase/dist/types/transformers/CJSImportTransformer.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/types/transformers/CJSImportTransformer.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,149 @@ +import type CJSImportProcessor from "../CJSImportProcessor"; +import type { HelperManager } from "../HelperManager"; +import type NameManager from "../NameManager"; +import type TokenProcessor from "../TokenProcessor"; +import type ReactHotLoaderTransformer from "./ReactHotLoaderTransformer"; +import type RootTransformer from "./RootTransformer"; +import Transformer from "./Transformer"; +/** + * Class for editing import statements when we are transforming to commonjs. + */ +export default class CJSImportTransformer extends Transformer { + readonly rootTransformer: RootTransformer; + readonly tokens: TokenProcessor; + readonly importProcessor: CJSImportProcessor; + readonly nameManager: NameManager; + readonly helperManager: HelperManager; + readonly reactHotLoaderTransformer: ReactHotLoaderTransformer | null; + readonly enableLegacyBabel5ModuleInterop: boolean; + readonly enableLegacyTypeScriptModuleInterop: boolean; + readonly isTypeScriptTransformEnabled: boolean; + readonly isFlowTransformEnabled: boolean; + readonly preserveDynamicImport: boolean; + readonly keepUnusedImports: boolean; + private hadExport; + private hadNamedExport; + private hadDefaultExport; + private declarationInfo; + constructor(rootTransformer: RootTransformer, tokens: TokenProcessor, importProcessor: CJSImportProcessor, nameManager: NameManager, helperManager: HelperManager, reactHotLoaderTransformer: ReactHotLoaderTransformer | null, enableLegacyBabel5ModuleInterop: boolean, enableLegacyTypeScriptModuleInterop: boolean, isTypeScriptTransformEnabled: boolean, isFlowTransformEnabled: boolean, preserveDynamicImport: boolean, keepUnusedImports: boolean); + getPrefixCode(): string; + getSuffixCode(): string; + process(): boolean; + private processImportEquals; + /** + * Transform this: + * import foo, {bar} from 'baz'; + * into + * var _baz = require('baz'); var _baz2 = _interopRequireDefault(_baz); + * + * The import code was already generated in the import preprocessing step, so + * we just need to look it up. + */ + private processImport; + /** + * Erase this import (since any CJS output would be completely different), and + * return true if this import is should be elided due to being a type-only + * import. Such imports will not be emitted at all to avoid side effects. + * + * Import elision only happens with the TypeScript or Flow transforms enabled. + * + * TODO: This function has some awkward overlap with + * CJSImportProcessor.pruneTypeOnlyImports , and the two should be unified. + * That function handles TypeScript implicit import name elision, and removes + * an import if all typical imported names (without `type`) are removed due + * to being type-only imports. This function handles Flow import removal and + * properly distinguishes `import 'foo'` from `import {} from 'foo'` for TS + * purposes. + * + * The position should end at the import string. + */ + private removeImportAndDetectIfShouldElide; + private removeRemainingImport; + private processIdentifier; + processObjectShorthand(): boolean; + processExport(): boolean; + private processAssignment; + /** + * Process something like `a += 3`, where `a` might be an exported value. + */ + private processComplexAssignment; + /** + * Process something like `++a`, where `a` might be an exported value. + */ + private processPreIncDec; + /** + * Process something like `a++`, where `a` might be an exported value. + * This starts at the `a`, not at the `++`. + */ + private processPostIncDec; + private processExportDefault; + private copyDecorators; + /** + * Transform a declaration like `export var`, `export let`, or `export const`. + */ + private processExportVar; + /** + * Determine if the export is of the form: + * export var/let/const [varName] = [expr]; + * In other words, determine if function name inference might apply. + */ + private isSimpleExportVar; + /** + * Transform an `export var` declaration initializing a single variable. + * + * For example, this: + * export const f = () => {}; + * becomes this: + * const f = () => {}; exports.f = f; + * + * The variable is unused (e.g. exports.f has the true value of the export). + * We need to produce an assignment of this form so that the function will + * have an inferred name of "f", which wouldn't happen in the more general + * case below. + */ + private processSimpleExportVar; + /** + * Transform normal declaration exports, including handling destructuring. + * For example, this: + * export const {x: [a = 2, b], c} = d; + * becomes this: + * ({x: [exports.a = 2, exports.b], c: exports.c} = d;) + */ + private processComplexExportVar; + /** + * Transform this: + * export function foo() {} + * into this: + * function foo() {} exports.foo = foo; + */ + private processExportFunction; + /** + * Skip past a function with a name and return that name. + */ + private processNamedFunction; + /** + * Transform this: + * export class A {} + * into this: + * class A {} exports.A = A; + */ + private processExportClass; + /** + * Transform this: + * export {a, b as c}; + * into this: + * exports.a = a; exports.c = b; + * + * OR + * + * Transform this: + * export {a, b as c} from './foo'; + * into the pre-generated Object.defineProperty code from the ImportProcessor. + * + * For the first case, if the TypeScript transform is enabled, we need to skip + * exports that are only defined as types. + */ + private processExportBindings; + private processExportStar; + private shouldElideExportedIdentifier; +} Index: frontend/node_modules/sucrase/dist/types/transformers/ESMImportTransformer.d.ts =================================================================== --- frontend/node_modules/sucrase/dist/types/transformers/ESMImportTransformer.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/types/transformers/ESMImportTransformer.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,52 @@ +import type { HelperManager } from "../HelperManager"; +import type { Options } from "../index"; +import type NameManager from "../NameManager"; +import type TokenProcessor from "../TokenProcessor"; +import type ReactHotLoaderTransformer from "./ReactHotLoaderTransformer"; +import Transformer from "./Transformer"; +/** + * Class for editing import statements when we are keeping the code as ESM. We still need to remove + * type-only imports in TypeScript and Flow. + */ +export default class ESMImportTransformer extends Transformer { + readonly tokens: TokenProcessor; + readonly nameManager: NameManager; + readonly helperManager: HelperManager; + readonly reactHotLoaderTransformer: ReactHotLoaderTransformer | null; + readonly isTypeScriptTransformEnabled: boolean; + readonly isFlowTransformEnabled: boolean; + readonly keepUnusedImports: boolean; + private nonTypeIdentifiers; + private declarationInfo; + private injectCreateRequireForImportRequire; + constructor(tokens: TokenProcessor, nameManager: NameManager, helperManager: HelperManager, reactHotLoaderTransformer: ReactHotLoaderTransformer | null, isTypeScriptTransformEnabled: boolean, isFlowTransformEnabled: boolean, keepUnusedImports: boolean, options: Options); + process(): boolean; + private processImportEquals; + private processImport; + /** + * Remove type bindings from this import, leaving the rest of the import intact. + * + * Return true if this import was ONLY types, and thus is eligible for removal. This will bail out + * of the replacement operation, so we can return early here. + */ + private removeImportTypeBindings; + private shouldAutomaticallyElideImportedName; + private processExportDefault; + /** + * Handle a statement with one of these forms: + * export {a, type b}; + * export {c, type d} from 'foo'; + * + * In both cases, any explicit type exports should be removed. In the first + * case, we also need to handle implicit export elision for names declared as + * types. In the second case, we must NOT do implicit named export elision, + * but we must remove the runtime import if all exports are type exports. + */ + private processNamedExports; + /** + * ESM elides all imports with the rule that we only elide if we see that it's + * a type and never see it as a value. This is in contrast to CJS, which + * elides imports that are completely unknown. + */ + private shouldElideExportedName; +} Index: frontend/node_modules/sucrase/dist/types/transformers/FlowTransformer.d.ts =================================================================== --- frontend/node_modules/sucrase/dist/types/transformers/FlowTransformer.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/types/transformers/FlowTransformer.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,79 @@ +import type TokenProcessor from "../TokenProcessor"; +import type RootTransformer from "./RootTransformer"; +import Transformer from "./Transformer"; +export default class FlowTransformer extends Transformer { + readonly rootTransformer: RootTransformer; + readonly tokens: TokenProcessor; + readonly isImportsTransformEnabled: boolean; + constructor(rootTransformer: RootTransformer, tokens: TokenProcessor, isImportsTransformEnabled: boolean); + process(): boolean; + /** + * Handle a declaration like: + * export enum E ... + * + * With this imports transform, this becomes: + * const E = [[enum]]; exports.E = E; + * + * otherwise, it becomes: + * export const E = [[enum]]; + */ + processNamedExportEnum(): void; + /** + * Handle a declaration like: + * export default enum E + * + * With the imports transform, this becomes: + * const E = [[enum]]; exports.default = E; + * + * otherwise, it becomes: + * const E = [[enum]]; export default E; + */ + processDefaultExportEnum(): void; + /** + * Transpile flow enums to invoke the "flow-enums-runtime" library. + * + * Currently, the transpiled code always uses `require("flow-enums-runtime")`, + * but if future flexibility is needed, we could expose a config option for + * this string (similar to configurable JSX). Even when targeting ESM, the + * default behavior of babel-plugin-transform-flow-enums is to use require + * rather than injecting an import. + * + * Flow enums are quite a bit simpler than TS enums and have some convenient + * constraints: + * - Element initializers must be either always present or always absent. That + * means that we can use fixed lookahead on the first element (if any) and + * assume that all elements are like that. + * - The right-hand side of an element initializer must be a literal value, + * not a complex expression and not referencing other elements. That means + * we can simply copy a single token. + * + * Enums can be broken up into three basic cases: + * + * Mirrored enums: + * enum E {A, B} + * -> + * const E = require("flow-enums-runtime").Mirrored(["A", "B"]); + * + * Initializer enums: + * enum E {A = 1, B = 2} + * -> + * const E = require("flow-enums-runtime")({A: 1, B: 2}); + * + * Symbol enums: + * enum E of symbol {A, B} + * -> + * const E = require("flow-enums-runtime")({A: Symbol("A"), B: Symbol("B")}); + * + * We can statically detect which of the three cases this is by looking at the + * "of" declaration (if any) and seeing if the first element has an initializer. + * Since the other transform details are so similar between the three cases, we + * use a single implementation and vary the transform within processEnumElement + * based on case. + */ + processEnum(): void; + /** + * Process an individual enum element, producing either an array element or an + * object element based on what type of enum this is. + */ + processEnumElement(isSymbolEnum: boolean, hasInitializers: boolean): void; +} Index: frontend/node_modules/sucrase/dist/types/transformers/JSXTransformer.d.ts =================================================================== --- frontend/node_modules/sucrase/dist/types/transformers/JSXTransformer.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/types/transformers/JSXTransformer.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,144 @@ +import type CJSImportProcessor from "../CJSImportProcessor"; +import type { Options } from "../index"; +import type NameManager from "../NameManager"; +import { JSXRole } from "../parser/tokenizer"; +import type TokenProcessor from "../TokenProcessor"; +import { type JSXPragmaInfo } from "../util/getJSXPragmaInfo"; +import type RootTransformer from "./RootTransformer"; +import Transformer from "./Transformer"; +export default class JSXTransformer extends Transformer { + readonly rootTransformer: RootTransformer; + readonly tokens: TokenProcessor; + readonly importProcessor: CJSImportProcessor | null; + readonly nameManager: NameManager; + readonly options: Options; + jsxPragmaInfo: JSXPragmaInfo; + jsxImportSource: string; + isAutomaticRuntime: boolean; + lastLineNumber: number; + lastIndex: number; + filenameVarName: string | null; + esmAutomaticImportNameResolutions: { + [name: string]: string; + }; + cjsAutomaticModuleNameResolutions: { + [path: string]: string; + }; + constructor(rootTransformer: RootTransformer, tokens: TokenProcessor, importProcessor: CJSImportProcessor | null, nameManager: NameManager, options: Options); + process(): boolean; + getPrefixCode(): string; + processJSXTag(): void; + getElementLocationCode(firstTokenStart: number): string; + /** + * Get the line number for this source position. This is calculated lazily and + * must be called in increasing order by index. + */ + getLineNumberForIndex(index: number): number; + /** + * Convert the current JSX element to a call to jsx, jsxs, or jsxDEV. This is + * the primary transformation for the automatic transform. + * + * Example: + *
Hello{x}
+ * becomes + * jsxs('div', {a: 1, children: ["Hello", x]}, 2) + */ + transformTagToJSXFunc(elementLocationCode: string | null, jsxRole: JSXRole): void; + /** + * Convert the current JSX element to a createElement call. In the classic + * runtime, this is the only case. In the automatic runtime, this is called + * as a fallback in some situations. + * + * Example: + *
Hello{x}
+ * becomes + * React.createElement('div', {a: 1, key: 2}, "Hello", x) + */ + transformTagToCreateElement(elementLocationCode: string | null): void; + /** + * Get the code for the relevant function for this context: jsx, jsxs, + * or jsxDEV. The following open-paren is included as well. + * + * These functions are only used for the automatic runtime, so they are always + * auto-imported, but the auto-import will be either CJS or ESM based on the + * target module format. + */ + getJSXFuncInvocationCode(isStatic: boolean): string; + /** + * Return the code to use for the createElement function, e.g. + * `React.createElement`, including the following open-paren. + * + * This is the main function to use for the classic runtime. For the + * automatic runtime, this function is used as a fallback function to + * preserve behavior when there is a prop spread followed by an explicit + * key. In that automatic runtime case, the function should be automatically + * imported. + */ + getCreateElementInvocationCode(): string; + /** + * Return the code to use as the component when compiling a shorthand + * fragment, e.g. `React.Fragment`. + * + * This may be called from either the classic or automatic runtime, and + * the value should be auto-imported for the automatic runtime. + */ + getFragmentCode(): string; + /** + * Return code that invokes the given function. + * + * When the imports transform is enabled, use the CJSImportTransformer + * strategy of using `.call(void 0, ...` to avoid passing a `this` value in a + * situation that would otherwise look like a method call. + */ + claimAutoImportedFuncInvocation(funcName: string, importPathSuffix: string): string; + claimAutoImportedName(funcName: string, importPathSuffix: string): string; + /** + * Process the first part of a tag, before any props. + */ + processTagIntro(): void; + /** + * Starting at the beginning of the props, add the props argument to + * React.createElement, including the comma before it. + */ + processPropsObjectWithDevInfo(elementLocationCode: string | null): void; + /** + * Transform the core part of the props, assuming that a { has already been + * inserted before us and that a } will be inserted after us. + * + * If extractKeyCode is true (i.e. when using any jsx... function), any prop + * named "key" has its code captured and returned rather than being emitted to + * the output code. This shifts line numbers, and emitting the code later will + * correct line numbers again. If no key is found or if extractKeyCode is + * false, this function returns null. + */ + processProps(extractKeyCode: boolean): string | null; + processPropName(propName: string): void; + processPropValue(): void; + processStringPropValue(): void; + /** + * Starting in the middle of the props object literal, produce an additional + * prop for the children and close the object literal. + */ + processAutomaticChildrenAndEndProps(jsxRole: JSXRole): void; + /** + * Transform children into a comma-separated list, which will be either + * arguments to createElement or array elements of a children prop. + */ + processChildren(needsInitialComma: boolean): void; + /** + * Turn a JSX text element into a string literal, or nothing at all if the JSX + * text resolves to the empty string. + * + * Returns true if a string literal is emitted, false otherwise. + */ + processChildTextElement(needsComma: boolean): boolean; + getDevSource(elementLocationCode: string): string; + getFilenameVarName(): string; +} +/** + * Spec for identifiers: https://tc39.github.io/ecma262/#prod-IdentifierStart. + * + * Really only treat anything starting with a-z as tag names. `_`, `$`, `é` + * should be treated as component names + */ +export declare function startsWithLowerCase(s: string): boolean; Index: frontend/node_modules/sucrase/dist/types/transformers/JestHoistTransformer.d.ts =================================================================== --- frontend/node_modules/sucrase/dist/types/transformers/JestHoistTransformer.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/types/transformers/JestHoistTransformer.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,32 @@ +import type CJSImportProcessor from "../CJSImportProcessor"; +import type NameManager from "../NameManager"; +import type TokenProcessor from "../TokenProcessor"; +import type RootTransformer from "./RootTransformer"; +import Transformer from "./Transformer"; +/** + * Implementation of babel-plugin-jest-hoist, which hoists up some jest method + * calls above the imports to allow them to override other imports. + * + * To preserve line numbers, rather than directly moving the jest.mock code, we + * wrap each invocation in a function statement and then call the function from + * the top of the file. + */ +export default class JestHoistTransformer extends Transformer { + readonly rootTransformer: RootTransformer; + readonly tokens: TokenProcessor; + readonly nameManager: NameManager; + readonly importProcessor: CJSImportProcessor | null; + private readonly hoistedFunctionNames; + constructor(rootTransformer: RootTransformer, tokens: TokenProcessor, nameManager: NameManager, importProcessor: CJSImportProcessor | null); + process(): boolean; + getHoistedCode(): string; + /** + * Extracts any methods calls on the jest-object that should be hoisted. + * + * According to the jest docs, https://jestjs.io/docs/en/jest-object#jestmockmodulename-factory-options, + * mock, unmock, enableAutomock, disableAutomock, are the methods that should be hoisted. + * + * We do not apply the same checks of the arguments as babel-plugin-jest-hoist does. + */ + private extractHoistedCalls; +} Index: frontend/node_modules/sucrase/dist/types/transformers/NumericSeparatorTransformer.d.ts =================================================================== --- frontend/node_modules/sucrase/dist/types/transformers/NumericSeparatorTransformer.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/types/transformers/NumericSeparatorTransformer.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,7 @@ +import type TokenProcessor from "../TokenProcessor"; +import Transformer from "./Transformer"; +export default class NumericSeparatorTransformer extends Transformer { + readonly tokens: TokenProcessor; + constructor(tokens: TokenProcessor); + process(): boolean; +} Index: frontend/node_modules/sucrase/dist/types/transformers/OptionalCatchBindingTransformer.d.ts =================================================================== --- frontend/node_modules/sucrase/dist/types/transformers/OptionalCatchBindingTransformer.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/types/transformers/OptionalCatchBindingTransformer.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,9 @@ +import type NameManager from "../NameManager"; +import type TokenProcessor from "../TokenProcessor"; +import Transformer from "./Transformer"; +export default class OptionalCatchBindingTransformer extends Transformer { + readonly tokens: TokenProcessor; + readonly nameManager: NameManager; + constructor(tokens: TokenProcessor, nameManager: NameManager); + process(): boolean; +} Index: frontend/node_modules/sucrase/dist/types/transformers/OptionalChainingNullishTransformer.d.ts =================================================================== --- frontend/node_modules/sucrase/dist/types/transformers/OptionalChainingNullishTransformer.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/types/transformers/OptionalChainingNullishTransformer.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,36 @@ +import type NameManager from "../NameManager"; +import type TokenProcessor from "../TokenProcessor"; +import Transformer from "./Transformer"; +/** + * Transformer supporting the optional chaining and nullish coalescing operators. + * + * Tech plan here: + * https://github.com/alangpierce/sucrase/wiki/Sucrase-Optional-Chaining-and-Nullish-Coalescing-Technical-Plan + * + * The prefix and suffix code snippets are handled by TokenProcessor, and this transformer handles + * the operators themselves. + */ +export default class OptionalChainingNullishTransformer extends Transformer { + readonly tokens: TokenProcessor; + readonly nameManager: NameManager; + constructor(tokens: TokenProcessor, nameManager: NameManager); + process(): boolean; + /** + * Determine if the current token is the last of its chain, so that we know whether it's eligible + * to have a delete op inserted. + * + * We can do this by walking forward until we determine one way or another. Each + * isOptionalChainStart token must be paired with exactly one isOptionalChainEnd token after it in + * a nesting way, so we can track depth and walk to the end of the chain (the point where the + * depth goes negative) and see if any other subscript token is after us in the chain. + */ + isLastSubscriptInChain(): boolean; + /** + * Determine if we are the open-paren in an expression like super.a()?.b. + * + * We can do this by walking backward to find the previous subscript. If that subscript was + * preceded by a super, then we must be the subscript after it, so if this is a call expression, + * we'll need to attach the right context. + */ + justSkippedSuper(): boolean; +} Index: frontend/node_modules/sucrase/dist/types/transformers/ReactDisplayNameTransformer.d.ts =================================================================== --- frontend/node_modules/sucrase/dist/types/transformers/ReactDisplayNameTransformer.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/types/transformers/ReactDisplayNameTransformer.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,29 @@ +import type CJSImportProcessor from "../CJSImportProcessor"; +import type { Options } from "../index"; +import type TokenProcessor from "../TokenProcessor"; +import type RootTransformer from "./RootTransformer"; +import Transformer from "./Transformer"; +/** + * Implementation of babel-plugin-transform-react-display-name, which adds a + * display name to usages of React.createClass and createReactClass. + */ +export default class ReactDisplayNameTransformer extends Transformer { + readonly rootTransformer: RootTransformer; + readonly tokens: TokenProcessor; + readonly importProcessor: CJSImportProcessor | null; + readonly options: Options; + constructor(rootTransformer: RootTransformer, tokens: TokenProcessor, importProcessor: CJSImportProcessor | null, options: Options); + process(): boolean; + /** + * This is called with the token position at the open-paren. + */ + private tryProcessCreateClassCall; + private findDisplayName; + private getDisplayNameFromFilename; + /** + * We only want to add a display name when this is a function call containing + * one argument, which is an object literal without `displayName` as an + * existing key. + */ + private classNeedsDisplayName; +} Index: frontend/node_modules/sucrase/dist/types/transformers/ReactHotLoaderTransformer.d.ts =================================================================== --- frontend/node_modules/sucrase/dist/types/transformers/ReactHotLoaderTransformer.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/types/transformers/ReactHotLoaderTransformer.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,12 @@ +import type TokenProcessor from "../TokenProcessor"; +import Transformer from "./Transformer"; +export default class ReactHotLoaderTransformer extends Transformer { + readonly tokens: TokenProcessor; + readonly filePath: string; + private extractedDefaultExportName; + constructor(tokens: TokenProcessor, filePath: string); + setExtractedDefaultExportName(extractedDefaultExportName: string): void; + getPrefixCode(): string; + getSuffixCode(): string; + process(): boolean; +} Index: frontend/node_modules/sucrase/dist/types/transformers/RootTransformer.d.ts =================================================================== --- frontend/node_modules/sucrase/dist/types/transformers/RootTransformer.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/types/transformers/RootTransformer.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,52 @@ +import type { Options, SucraseContext, Transform } from "../index"; +import { type ClassInfo } from "../util/getClassInfo"; +export interface RootTransformerResult { + code: string; + mappings: Array; +} +export default class RootTransformer { + private transformers; + private nameManager; + private tokens; + private generatedVariables; + private isImportsTransformEnabled; + private isReactHotLoaderTransformEnabled; + private disableESTransforms; + private helperManager; + constructor(sucraseContext: SucraseContext, transforms: Array, enableLegacyBabel5ModuleInterop: boolean, options: Options); + transform(): RootTransformerResult; + processBalancedCode(): void; + processToken(): void; + /** + * Skip past a class with a name and return that name. + */ + processNamedClass(): string; + processClass(): void; + /** + * We want to just handle class fields in all contexts, since TypeScript supports them. Later, + * when some JS implementations support class fields, this should be made optional. + */ + processClassBody(classInfo: ClassInfo, className: string | null): void; + makeConstructorInitCode(constructorInitializerStatements: Array, instanceInitializerNames: Array, className: string): string; + /** + * Normally it's ok to simply remove type tokens, but we need to be more careful when dealing with + * arrow function return types since they can confuse the parser. In that case, we want to move + * the close-paren to the same line as the arrow. + * + * See https://github.com/alangpierce/sucrase/issues/391 for more details. + */ + processPossibleArrowParamEnd(): boolean; + /** + * An async arrow function might be of the form: + * + * async < + * T + * >() => {} + * + * in which case, removing the type parameters will cause a syntax error. Detect this case and + * move the open-paren earlier. + */ + processPossibleAsyncArrowWithTypeParams(): boolean; + processPossibleTypeRange(): boolean; + shiftMappings(mappings: Array, prefixLength: number): Array; +} Index: frontend/node_modules/sucrase/dist/types/transformers/Transformer.d.ts =================================================================== --- frontend/node_modules/sucrase/dist/types/transformers/Transformer.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/types/transformers/Transformer.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,6 @@ +export default abstract class Transformer { + abstract process(): boolean; + getPrefixCode(): string; + getHoistedCode(): string; + getSuffixCode(): string; +} Index: frontend/node_modules/sucrase/dist/types/transformers/TypeScriptTransformer.d.ts =================================================================== --- frontend/node_modules/sucrase/dist/types/transformers/TypeScriptTransformer.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/types/transformers/TypeScriptTransformer.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,104 @@ +import type { Token } from "../parser/tokenizer"; +import type TokenProcessor from "../TokenProcessor"; +import type RootTransformer from "./RootTransformer"; +import Transformer from "./Transformer"; +export default class TypeScriptTransformer extends Transformer { + readonly rootTransformer: RootTransformer; + readonly tokens: TokenProcessor; + readonly isImportsTransformEnabled: boolean; + constructor(rootTransformer: RootTransformer, tokens: TokenProcessor, isImportsTransformEnabled: boolean); + process(): boolean; + processEnum(isExport?: boolean): void; + /** + * Transform an enum into equivalent JS. This has complexity in a few places: + * - TS allows string enums, numeric enums, and a mix of the two styles within an enum. + * - Enum keys are allowed to be referenced in later enum values. + * - Enum keys are allowed to be strings. + * - When enum values are omitted, they should follow an auto-increment behavior. + */ + processEnumBody(enumName: string): void; + /** + * Detect name information about this enum key, which will be used to determine which code to emit + * and whether we should declare a variable as part of this declaration. + * + * Some cases to keep in mind: + * - Enum keys can be implicitly referenced later, e.g. `X = 1, Y = X`. In Sucrase, we implement + * this by declaring a variable `X` so that later expressions can use it. + * - In addition to the usual identifier key syntax, enum keys are allowed to be string literals, + * e.g. `"hello world" = 3,`. Template literal syntax is NOT allowed. + * - Even if the enum key is defined as a string literal, it may still be referenced by identifier + * later, e.g. `"X" = 1, Y = X`. That means that we need to detect whether or not a string + * literal is identifier-like and emit a variable if so, even if the declaration did not use an + * identifier. + * - Reserved keywords like `break` are valid enum keys, but are not valid to be referenced later + * and would be a syntax error if we emitted a variable, so we need to skip the variable + * declaration in those cases. + * + * The variableName return value captures these nuances: if non-null, we can and must emit a + * variable declaration, and if null, we can't and shouldn't. + */ + extractEnumKeyInfo(nameToken: Token): { + nameStringCode: string; + variableName: string | null; + }; + /** + * Handle an enum member where the RHS is just a string literal (not omitted, not a number, and + * not a complex expression). This is the typical form for TS string enums, and in this case, we + * do *not* create a reverse mapping. + * + * This is called after deleting the key token, when the token processor is at the equals sign. + * + * Example 1: + * someKey = "some value" + * -> + * const someKey = "some value"; MyEnum["someKey"] = someKey; + * + * Example 2: + * "some key" = "some value" + * -> + * MyEnum["some key"] = "some value"; + */ + processStringLiteralEnumMember(enumName: string, nameStringCode: string, variableName: string | null): void; + /** + * Handle an enum member initialized with an expression on the right-hand side (other than a + * string literal). In these cases, we should transform the expression and emit code that sets up + * a reverse mapping. + * + * The TypeScript implementation of this operation distinguishes between expressions that can be + * "constant folded" at compile time (i.e. consist of number literals and simple math operations + * on those numbers) and ones that are dynamic. For constant expressions, it emits the resolved + * numeric value, and auto-incrementing is only allowed in that case. Evaluating expressions at + * compile time would add significant complexity to Sucrase, so Sucrase instead leaves the + * expression as-is, and will later emit something like `MyEnum["previousKey"] + 1` to implement + * auto-incrementing. + * + * This is called after deleting the key token, when the token processor is at the equals sign. + * + * Example 1: + * someKey = 1 + 1 + * -> + * const someKey = 1 + 1; MyEnum[MyEnum["someKey"] = someKey] = "someKey"; + * + * Example 2: + * "some key" = 1 + 1 + * -> + * MyEnum[MyEnum["some key"] = 1 + 1] = "some key"; + */ + processExplicitValueEnumMember(enumName: string, nameStringCode: string, variableName: string | null): void; + /** + * Handle an enum member with no right-hand side expression. In this case, the value is the + * previous value plus 1, or 0 if there was no previous value. We should also always emit a + * reverse mapping. + * + * Example 1: + * someKey2 + * -> + * const someKey2 = someKey1 + 1; MyEnum[MyEnum["someKey2"] = someKey2] = "someKey2"; + * + * Example 2: + * "some key 2" + * -> + * MyEnum[MyEnum["some key 2"] = someKey1 + 1] = "some key 2"; + */ + processImplicitValueEnumMember(enumName: string, nameStringCode: string, variableName: string | null, previousValueCode: string | null): void; +} Index: frontend/node_modules/sucrase/dist/types/util/elideImportEquals.d.ts =================================================================== --- frontend/node_modules/sucrase/dist/types/util/elideImportEquals.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/types/util/elideImportEquals.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,2 @@ +import type TokenProcessor from "../TokenProcessor"; +export default function elideImportEquals(tokens: TokenProcessor): void; Index: frontend/node_modules/sucrase/dist/types/util/formatTokens.d.ts =================================================================== --- frontend/node_modules/sucrase/dist/types/util/formatTokens.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/types/util/formatTokens.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,2 @@ +import type { Token } from "../parser/tokenizer"; +export default function formatTokens(code: string, tokens: Array): string; Index: frontend/node_modules/sucrase/dist/types/util/getClassInfo.d.ts =================================================================== --- frontend/node_modules/sucrase/dist/types/util/getClassInfo.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/types/util/getClassInfo.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,34 @@ +import type NameManager from "../NameManager"; +import type TokenProcessor from "../TokenProcessor"; +import type RootTransformer from "../transformers/RootTransformer"; +export interface ClassHeaderInfo { + isExpression: boolean; + className: string | null; + hasSuperclass: boolean; +} +export interface TokenRange { + start: number; + end: number; +} +export interface FieldInfo extends TokenRange { + equalsIndex: number; + initializerName: string; +} +/** + * Information about a class returned to inform the implementation of class fields and constructor + * initializers. + */ +export interface ClassInfo { + headerInfo: ClassHeaderInfo; + constructorInitializerStatements: Array; + instanceInitializerNames: Array; + staticInitializerNames: Array; + constructorInsertPos: number | null; + fields: Array; + rangesToRemove: Array; +} +/** + * Get information about the class fields for this class, given a token processor pointing to the + * open-brace at the start of the class. + */ +export default function getClassInfo(rootTransformer: RootTransformer, tokens: TokenProcessor, nameManager: NameManager, disableESTransforms: boolean): ClassInfo; Index: frontend/node_modules/sucrase/dist/types/util/getDeclarationInfo.d.ts =================================================================== --- frontend/node_modules/sucrase/dist/types/util/getDeclarationInfo.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/types/util/getDeclarationInfo.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,18 @@ +import type TokenProcessor from "../TokenProcessor"; +export interface DeclarationInfo { + typeDeclarations: Set; + valueDeclarations: Set; +} +export declare const EMPTY_DECLARATION_INFO: DeclarationInfo; +/** + * Get all top-level identifiers that should be preserved when exported in TypeScript. + * + * Examples: + * - If an identifier is declared as `const x`, then `export {x}` should be preserved. + * - If it's declared as `type x`, then `export {x}` should be removed. + * - If it's declared as both `const x` and `type x`, then the export should be preserved. + * - Classes and enums should be preserved (even though they also introduce types). + * - Imported identifiers should be preserved since we don't have enough information to + * rule them out. --isolatedModules disallows re-exports, which catches errors here. + */ +export default function getDeclarationInfo(tokens: TokenProcessor): DeclarationInfo; Index: frontend/node_modules/sucrase/dist/types/util/getIdentifierNames.d.ts =================================================================== --- frontend/node_modules/sucrase/dist/types/util/getIdentifierNames.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/types/util/getIdentifierNames.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,5 @@ +import type { Token } from "../parser/tokenizer"; +/** + * Get all identifier names in the code, in order, including duplicates. + */ +export default function getIdentifierNames(code: string, tokens: Array): Array; Index: frontend/node_modules/sucrase/dist/types/util/getImportExportSpecifierInfo.d.ts =================================================================== --- frontend/node_modules/sucrase/dist/types/util/getImportExportSpecifierInfo.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/types/util/getImportExportSpecifierInfo.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,36 @@ +import type TokenProcessor from "../TokenProcessor"; +export type ImportExportSpecifierInfo = { + isType: false; + leftName: string; + rightName: string; + endIndex: number; +} | { + isType: true; + leftName: null; + rightName: null; + endIndex: number; +}; +/** + * Determine information about this named import or named export specifier. + * + * This syntax is the `a` from statements like these: + * import {A} from "./foo"; + * export {A}; + * export {A} from "./foo"; + * + * As it turns out, we can exactly characterize the syntax meaning by simply + * counting the number of tokens, which can be from 1 to 4: + * {A} + * {type A} + * {A as B} + * {type A as B} + * + * In the type case, we never actually need the names in practice, so don't get + * them. + * + * TODO: There's some redundancy with the type detection here and the isType + * flag that's already present on tokens in TS mode. This function could + * potentially be simplified and/or pushed to the call sites to avoid the object + * allocation. + */ +export default function getImportExportSpecifierInfo(tokens: TokenProcessor, index?: number): ImportExportSpecifierInfo; Index: frontend/node_modules/sucrase/dist/types/util/getJSXPragmaInfo.d.ts =================================================================== --- frontend/node_modules/sucrase/dist/types/util/getJSXPragmaInfo.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/types/util/getJSXPragmaInfo.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,8 @@ +import type { Options } from "../index"; +export interface JSXPragmaInfo { + base: string; + suffix: string; + fragmentBase: string; + fragmentSuffix: string; +} +export default function getJSXPragmaInfo(options: Options): JSXPragmaInfo; Index: frontend/node_modules/sucrase/dist/types/util/getNonTypeIdentifiers.d.ts =================================================================== --- frontend/node_modules/sucrase/dist/types/util/getNonTypeIdentifiers.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/types/util/getNonTypeIdentifiers.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,3 @@ +import type { Options } from "../index"; +import type TokenProcessor from "../TokenProcessor"; +export declare function getNonTypeIdentifiers(tokens: TokenProcessor, options: Options): Set; Index: frontend/node_modules/sucrase/dist/types/util/getTSImportedNames.d.ts =================================================================== --- frontend/node_modules/sucrase/dist/types/util/getTSImportedNames.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/types/util/getTSImportedNames.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,9 @@ +import type TokenProcessor from "../TokenProcessor"; +/** + * Special case code to scan for imported names in ESM TypeScript. We need to do this so we can + * properly get globals so we can compute shadowed globals. + * + * This is similar to logic in CJSImportProcessor, but trimmed down to avoid logic with CJS + * replacement and flow type imports. + */ +export default function getTSImportedNames(tokens: TokenProcessor): Set; Index: frontend/node_modules/sucrase/dist/types/util/isAsyncOperation.d.ts =================================================================== --- frontend/node_modules/sucrase/dist/types/util/isAsyncOperation.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/types/util/isAsyncOperation.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,11 @@ +import type TokenProcessor from "../TokenProcessor"; +/** + * Determine whether this optional chain or nullish coalescing operation has any await statements in + * it. If so, we'll need to transpile to an async operation. + * + * We compute this by walking the length of the operation and returning true if we see an await + * keyword used as a real await (rather than an object key or property access). Nested optional + * chain/nullish operations need to be tracked but don't silence await, but a nested async function + * (or any other nested scope) will make the await not count. + */ +export default function isAsyncOperation(tokens: TokenProcessor): boolean; Index: frontend/node_modules/sucrase/dist/types/util/isExportFrom.d.ts =================================================================== --- frontend/node_modules/sucrase/dist/types/util/isExportFrom.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/types/util/isExportFrom.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,6 @@ +import type TokenProcessor from "../TokenProcessor"; +/** + * Starting at `export {`, look ahead and return `true` if this is an + * `export {...} from` statement and `false` if this is a plain multi-export. + */ +export default function isExportFrom(tokens: TokenProcessor): boolean; Index: frontend/node_modules/sucrase/dist/types/util/isIdentifier.d.ts =================================================================== --- frontend/node_modules/sucrase/dist/types/util/isIdentifier.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/types/util/isIdentifier.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,8 @@ +/** + * Determine if the given name is a legal variable name. + * + * This is needed when transforming TypeScript enums; if an enum key is a valid + * variable name, it might be referenced later in the enum, so we need to + * declare a variable. + */ +export default function isIdentifier(name: string): boolean; Index: frontend/node_modules/sucrase/dist/types/util/removeMaybeImportAttributes.d.ts =================================================================== --- frontend/node_modules/sucrase/dist/types/util/removeMaybeImportAttributes.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/types/util/removeMaybeImportAttributes.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,6 @@ +import type TokenProcessor from "../TokenProcessor"; +/** + * Starting at a potential `with` or (legacy) `assert` token, remove the import + * attributes if they exist. + */ +export declare function removeMaybeImportAttributes(tokens: TokenProcessor): void; Index: frontend/node_modules/sucrase/dist/types/util/shouldElideDefaultExport.d.ts =================================================================== --- frontend/node_modules/sucrase/dist/types/util/shouldElideDefaultExport.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/types/util/shouldElideDefaultExport.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,6 @@ +import type TokenProcessor from "../TokenProcessor"; +import type { DeclarationInfo } from "./getDeclarationInfo"; +/** + * Common method sharing code between CJS and ESM cases, since they're the same here. + */ +export default function shouldElideDefaultExport(isTypeScriptTransformEnabled: boolean, keepUnusedImports: boolean, tokens: TokenProcessor, declarationInfo: DeclarationInfo): boolean; Index: frontend/node_modules/sucrase/dist/util/elideImportEquals.js =================================================================== --- frontend/node_modules/sucrase/dist/util/elideImportEquals.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/util/elideImportEquals.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,29 @@ +"use strict";Object.defineProperty(exports, "__esModule", {value: true});var _types = require('../parser/tokenizer/types'); + + + function elideImportEquals(tokens) { + // import + tokens.removeInitialToken(); + // name + tokens.removeToken(); + // = + tokens.removeToken(); + // name or require + tokens.removeToken(); + // Handle either `import A = require('A')` or `import A = B.C.D`. + if (tokens.matches1(_types.TokenType.parenL)) { + // ( + tokens.removeToken(); + // path string + tokens.removeToken(); + // ) + tokens.removeToken(); + } else { + while (tokens.matches1(_types.TokenType.dot)) { + // . + tokens.removeToken(); + // name + tokens.removeToken(); + } + } +} exports.default = elideImportEquals; Index: frontend/node_modules/sucrase/dist/util/formatTokens.js =================================================================== --- frontend/node_modules/sucrase/dist/util/formatTokens.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/util/formatTokens.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,74 @@ +"use strict";Object.defineProperty(exports, "__esModule", {value: true}); function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }var _linesandcolumns = require('lines-and-columns'); var _linesandcolumns2 = _interopRequireDefault(_linesandcolumns); + + +var _types = require('../parser/tokenizer/types'); + + function formatTokens(code, tokens) { + if (tokens.length === 0) { + return ""; + } + + const tokenKeys = Object.keys(tokens[0]).filter( + (k) => k !== "type" && k !== "value" && k !== "start" && k !== "end" && k !== "loc", + ); + const typeKeys = Object.keys(tokens[0].type).filter((k) => k !== "label" && k !== "keyword"); + + const headings = ["Location", "Label", "Raw", ...tokenKeys, ...typeKeys]; + + const lines = new (0, _linesandcolumns2.default)(code); + const rows = [headings, ...tokens.map(getTokenComponents)]; + const padding = headings.map(() => 0); + for (const components of rows) { + for (let i = 0; i < components.length; i++) { + padding[i] = Math.max(padding[i], components[i].length); + } + } + return rows + .map((components) => components.map((component, i) => component.padEnd(padding[i])).join(" ")) + .join("\n"); + + function getTokenComponents(token) { + const raw = code.slice(token.start, token.end); + return [ + formatRange(token.start, token.end), + _types.formatTokenType.call(void 0, token.type), + truncate(String(raw), 14), + // @ts-ignore: Intentional dynamic access by key. + ...tokenKeys.map((key) => formatValue(token[key], key)), + // @ts-ignore: Intentional dynamic access by key. + ...typeKeys.map((key) => formatValue(token.type[key], key)), + ]; + } + + // eslint-disable-next-line @typescript-eslint/no-explicit-any + function formatValue(value, key) { + if (value === true) { + return key; + } else if (value === false || value === null) { + return ""; + } else { + return String(value); + } + } + + function formatRange(start, end) { + return `${formatPos(start)}-${formatPos(end)}`; + } + + function formatPos(pos) { + const location = lines.locationForIndex(pos); + if (!location) { + return "Unknown"; + } else { + return `${location.line + 1}:${location.column + 1}`; + } + } +} exports.default = formatTokens; + +function truncate(s, length) { + if (s.length > length) { + return `${s.slice(0, length - 3)}...`; + } else { + return s; + } +} Index: frontend/node_modules/sucrase/dist/util/getClassInfo.js =================================================================== --- frontend/node_modules/sucrase/dist/util/getClassInfo.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/util/getClassInfo.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,352 @@ +"use strict";Object.defineProperty(exports, "__esModule", {value: true}); + +var _keywords = require('../parser/tokenizer/keywords'); +var _types = require('../parser/tokenizer/types'); + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +/** + * Get information about the class fields for this class, given a token processor pointing to the + * open-brace at the start of the class. + */ + function getClassInfo( + rootTransformer, + tokens, + nameManager, + disableESTransforms, +) { + const snapshot = tokens.snapshot(); + + const headerInfo = processClassHeader(tokens); + + let constructorInitializerStatements = []; + const instanceInitializerNames = []; + const staticInitializerNames = []; + let constructorInsertPos = null; + const fields = []; + const rangesToRemove = []; + + const classContextId = tokens.currentToken().contextId; + if (classContextId == null) { + throw new Error("Expected non-null class context ID on class open-brace."); + } + + tokens.nextToken(); + while (!tokens.matchesContextIdAndLabel(_types.TokenType.braceR, classContextId)) { + if (tokens.matchesContextual(_keywords.ContextualKeyword._constructor) && !tokens.currentToken().isType) { + ({constructorInitializerStatements, constructorInsertPos} = processConstructor(tokens)); + } else if (tokens.matches1(_types.TokenType.semi)) { + if (!disableESTransforms) { + rangesToRemove.push({start: tokens.currentIndex(), end: tokens.currentIndex() + 1}); + } + tokens.nextToken(); + } else if (tokens.currentToken().isType) { + tokens.nextToken(); + } else { + // Either a method or a field. Skip to the identifier part. + const statementStartIndex = tokens.currentIndex(); + let isStatic = false; + let isESPrivate = false; + let isDeclareOrAbstract = false; + while (isAccessModifier(tokens.currentToken())) { + if (tokens.matches1(_types.TokenType._static)) { + isStatic = true; + } + if (tokens.matches1(_types.TokenType.hash)) { + isESPrivate = true; + } + if (tokens.matches1(_types.TokenType._declare) || tokens.matches1(_types.TokenType._abstract)) { + isDeclareOrAbstract = true; + } + tokens.nextToken(); + } + if (isStatic && tokens.matches1(_types.TokenType.braceL)) { + // This is a static block, so don't process it in any special way. + skipToNextClassElement(tokens, classContextId); + continue; + } + if (isESPrivate) { + // Sucrase doesn't attempt to transpile private fields; just leave them as-is. + skipToNextClassElement(tokens, classContextId); + continue; + } + if ( + tokens.matchesContextual(_keywords.ContextualKeyword._constructor) && + !tokens.currentToken().isType + ) { + ({constructorInitializerStatements, constructorInsertPos} = processConstructor(tokens)); + continue; + } + + const nameStartIndex = tokens.currentIndex(); + skipFieldName(tokens); + if (tokens.matches1(_types.TokenType.lessThan) || tokens.matches1(_types.TokenType.parenL)) { + // This is a method, so nothing to process. + skipToNextClassElement(tokens, classContextId); + continue; + } + // There might be a type annotation that we need to skip. + while (tokens.currentToken().isType) { + tokens.nextToken(); + } + if (tokens.matches1(_types.TokenType.eq)) { + const equalsIndex = tokens.currentIndex(); + // This is an initializer, so we need to wrap in an initializer method. + const valueEnd = tokens.currentToken().rhsEndIndex; + if (valueEnd == null) { + throw new Error("Expected rhsEndIndex on class field assignment."); + } + tokens.nextToken(); + while (tokens.currentIndex() < valueEnd) { + rootTransformer.processToken(); + } + let initializerName; + if (isStatic) { + initializerName = nameManager.claimFreeName("__initStatic"); + staticInitializerNames.push(initializerName); + } else { + initializerName = nameManager.claimFreeName("__init"); + instanceInitializerNames.push(initializerName); + } + // Fields start at the name, so `static x = 1;` has a field range of `x = 1;`. + fields.push({ + initializerName, + equalsIndex, + start: nameStartIndex, + end: tokens.currentIndex(), + }); + } else if (!disableESTransforms || isDeclareOrAbstract) { + // This is a regular field declaration, like `x;`. With the class transform enabled, we just + // remove the line so that no output is produced. With the class transform disabled, we + // usually want to preserve the declaration (but still strip types), but if the `declare` + // or `abstract` keyword is specified, we should remove the line to avoid initializing the + // value to undefined. + rangesToRemove.push({start: statementStartIndex, end: tokens.currentIndex()}); + } + } + } + + tokens.restoreToSnapshot(snapshot); + if (disableESTransforms) { + // With ES transforms disabled, we don't want to transform regular class + // field declarations, and we don't need to do any additional tricks to + // reference the constructor for static init, but we still need to transform + // TypeScript field initializers defined as constructor parameters and we + // still need to remove `declare` fields. For now, we run the same code + // path but omit any field information, as if the class had no field + // declarations. In the future, when we fully drop the class fields + // transform, we can simplify this code significantly. + return { + headerInfo, + constructorInitializerStatements, + instanceInitializerNames: [], + staticInitializerNames: [], + constructorInsertPos, + fields: [], + rangesToRemove, + }; + } else { + return { + headerInfo, + constructorInitializerStatements, + instanceInitializerNames, + staticInitializerNames, + constructorInsertPos, + fields, + rangesToRemove, + }; + } +} exports.default = getClassInfo; + +/** + * Move the token processor to the next method/field in the class. + * + * To do that, we seek forward to the next start of a class name (either an open + * bracket or an identifier, or the closing curly brace), then seek backward to + * include any access modifiers. + */ +function skipToNextClassElement(tokens, classContextId) { + tokens.nextToken(); + while (tokens.currentToken().contextId !== classContextId) { + tokens.nextToken(); + } + while (isAccessModifier(tokens.tokenAtRelativeIndex(-1))) { + tokens.previousToken(); + } +} + +function processClassHeader(tokens) { + const classToken = tokens.currentToken(); + const contextId = classToken.contextId; + if (contextId == null) { + throw new Error("Expected context ID on class token."); + } + const isExpression = classToken.isExpression; + if (isExpression == null) { + throw new Error("Expected isExpression on class token."); + } + let className = null; + let hasSuperclass = false; + tokens.nextToken(); + if (tokens.matches1(_types.TokenType.name)) { + className = tokens.identifierName(); + } + while (!tokens.matchesContextIdAndLabel(_types.TokenType.braceL, contextId)) { + // If this has a superclass, there will always be an `extends` token. If it doesn't have a + // superclass, only type parameters and `implements` clauses can show up here, all of which + // consist only of type tokens. A declaration like `class A {` should *not* count + // as having a superclass. + if (tokens.matches1(_types.TokenType._extends) && !tokens.currentToken().isType) { + hasSuperclass = true; + } + tokens.nextToken(); + } + return {isExpression, className, hasSuperclass}; +} + +/** + * Extract useful information out of a constructor, starting at the "constructor" name. + */ +function processConstructor(tokens) + + + { + const constructorInitializerStatements = []; + + tokens.nextToken(); + const constructorContextId = tokens.currentToken().contextId; + if (constructorContextId == null) { + throw new Error("Expected context ID on open-paren starting constructor params."); + } + // Advance through parameters looking for access modifiers. + while (!tokens.matchesContextIdAndLabel(_types.TokenType.parenR, constructorContextId)) { + if (tokens.currentToken().contextId === constructorContextId) { + // Current token is an open paren or comma just before a param, so check + // that param for access modifiers. + tokens.nextToken(); + if (isAccessModifier(tokens.currentToken())) { + tokens.nextToken(); + while (isAccessModifier(tokens.currentToken())) { + tokens.nextToken(); + } + const token = tokens.currentToken(); + if (token.type !== _types.TokenType.name) { + throw new Error("Expected identifier after access modifiers in constructor arg."); + } + const name = tokens.identifierNameForToken(token); + constructorInitializerStatements.push(`this.${name} = ${name}`); + } + } else { + tokens.nextToken(); + } + } + // ) + tokens.nextToken(); + // Constructor type annotations are invalid, but skip them anyway since + // they're easy to skip. + while (tokens.currentToken().isType) { + tokens.nextToken(); + } + let constructorInsertPos = tokens.currentIndex(); + + // Advance through body looking for a super call. + let foundSuperCall = false; + while (!tokens.matchesContextIdAndLabel(_types.TokenType.braceR, constructorContextId)) { + if (!foundSuperCall && tokens.matches2(_types.TokenType._super, _types.TokenType.parenL)) { + tokens.nextToken(); + const superCallContextId = tokens.currentToken().contextId; + if (superCallContextId == null) { + throw new Error("Expected a context ID on the super call"); + } + while (!tokens.matchesContextIdAndLabel(_types.TokenType.parenR, superCallContextId)) { + tokens.nextToken(); + } + constructorInsertPos = tokens.currentIndex(); + foundSuperCall = true; + } + tokens.nextToken(); + } + // } + tokens.nextToken(); + + return {constructorInitializerStatements, constructorInsertPos}; +} + +/** + * Determine if this is any token that can go before the name in a method/field. + */ +function isAccessModifier(token) { + return [ + _types.TokenType._async, + _types.TokenType._get, + _types.TokenType._set, + _types.TokenType.plus, + _types.TokenType.minus, + _types.TokenType._readonly, + _types.TokenType._static, + _types.TokenType._public, + _types.TokenType._private, + _types.TokenType._protected, + _types.TokenType._override, + _types.TokenType._abstract, + _types.TokenType.star, + _types.TokenType._declare, + _types.TokenType.hash, + ].includes(token.type); +} + +/** + * The next token or set of tokens is either an identifier or an expression in square brackets, for + * a method or field name. + */ +function skipFieldName(tokens) { + if (tokens.matches1(_types.TokenType.bracketL)) { + const startToken = tokens.currentToken(); + const classContextId = startToken.contextId; + if (classContextId == null) { + throw new Error("Expected class context ID on computed name open bracket."); + } + while (!tokens.matchesContextIdAndLabel(_types.TokenType.bracketR, classContextId)) { + tokens.nextToken(); + } + tokens.nextToken(); + } else { + tokens.nextToken(); + } +} Index: frontend/node_modules/sucrase/dist/util/getDeclarationInfo.js =================================================================== --- frontend/node_modules/sucrase/dist/util/getDeclarationInfo.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/util/getDeclarationInfo.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,40 @@ +"use strict";Object.defineProperty(exports, "__esModule", {value: true});var _tokenizer = require('../parser/tokenizer'); +var _types = require('../parser/tokenizer/types'); + + + + + + + + const EMPTY_DECLARATION_INFO = { + typeDeclarations: new Set(), + valueDeclarations: new Set(), +}; exports.EMPTY_DECLARATION_INFO = EMPTY_DECLARATION_INFO; + +/** + * Get all top-level identifiers that should be preserved when exported in TypeScript. + * + * Examples: + * - If an identifier is declared as `const x`, then `export {x}` should be preserved. + * - If it's declared as `type x`, then `export {x}` should be removed. + * - If it's declared as both `const x` and `type x`, then the export should be preserved. + * - Classes and enums should be preserved (even though they also introduce types). + * - Imported identifiers should be preserved since we don't have enough information to + * rule them out. --isolatedModules disallows re-exports, which catches errors here. + */ + function getDeclarationInfo(tokens) { + const typeDeclarations = new Set(); + const valueDeclarations = new Set(); + for (let i = 0; i < tokens.tokens.length; i++) { + const token = tokens.tokens[i]; + if (token.type === _types.TokenType.name && _tokenizer.isTopLevelDeclaration.call(void 0, token)) { + if (token.isType) { + typeDeclarations.add(tokens.identifierNameForToken(token)); + } else { + valueDeclarations.add(tokens.identifierNameForToken(token)); + } + } + } + return {typeDeclarations, valueDeclarations}; +} exports.default = getDeclarationInfo; Index: frontend/node_modules/sucrase/dist/util/getIdentifierNames.js =================================================================== --- frontend/node_modules/sucrase/dist/util/getIdentifierNames.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/util/getIdentifierNames.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,15 @@ +"use strict";Object.defineProperty(exports, "__esModule", {value: true}); +var _types = require('../parser/tokenizer/types'); + +/** + * Get all identifier names in the code, in order, including duplicates. + */ + function getIdentifierNames(code, tokens) { + const names = []; + for (const token of tokens) { + if (token.type === _types.TokenType.name) { + names.push(code.slice(token.start, token.end)); + } + } + return names; +} exports.default = getIdentifierNames; Index: frontend/node_modules/sucrase/dist/util/getImportExportSpecifierInfo.js =================================================================== --- frontend/node_modules/sucrase/dist/util/getImportExportSpecifierInfo.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/util/getImportExportSpecifierInfo.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,92 @@ +"use strict";Object.defineProperty(exports, "__esModule", {value: true});var _types = require('../parser/tokenizer/types'); + + + + + + + + + + + + + + + + +/** + * Determine information about this named import or named export specifier. + * + * This syntax is the `a` from statements like these: + * import {A} from "./foo"; + * export {A}; + * export {A} from "./foo"; + * + * As it turns out, we can exactly characterize the syntax meaning by simply + * counting the number of tokens, which can be from 1 to 4: + * {A} + * {type A} + * {A as B} + * {type A as B} + * + * In the type case, we never actually need the names in practice, so don't get + * them. + * + * TODO: There's some redundancy with the type detection here and the isType + * flag that's already present on tokens in TS mode. This function could + * potentially be simplified and/or pushed to the call sites to avoid the object + * allocation. + */ + function getImportExportSpecifierInfo( + tokens, + index = tokens.currentIndex(), +) { + let endIndex = index + 1; + if (isSpecifierEnd(tokens, endIndex)) { + // import {A} + const name = tokens.identifierNameAtIndex(index); + return { + isType: false, + leftName: name, + rightName: name, + endIndex, + }; + } + endIndex++; + if (isSpecifierEnd(tokens, endIndex)) { + // import {type A} + return { + isType: true, + leftName: null, + rightName: null, + endIndex, + }; + } + endIndex++; + if (isSpecifierEnd(tokens, endIndex)) { + // import {A as B} + return { + isType: false, + leftName: tokens.identifierNameAtIndex(index), + rightName: tokens.identifierNameAtIndex(index + 2), + endIndex, + }; + } + endIndex++; + if (isSpecifierEnd(tokens, endIndex)) { + // import {type A as B} + return { + isType: true, + leftName: null, + rightName: null, + endIndex, + }; + } + throw new Error(`Unexpected import/export specifier at ${index}`); +} exports.default = getImportExportSpecifierInfo; + +function isSpecifierEnd(tokens, index) { + const token = tokens.tokens[index]; + return token.type === _types.TokenType.braceR || token.type === _types.TokenType.comma; +} Index: frontend/node_modules/sucrase/dist/util/getJSXPragmaInfo.js =================================================================== --- frontend/node_modules/sucrase/dist/util/getJSXPragmaInfo.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/util/getJSXPragmaInfo.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,22 @@ +"use strict";Object.defineProperty(exports, "__esModule", {value: true}); + + + + + + + + + function getJSXPragmaInfo(options) { + const [base, suffix] = splitPragma(options.jsxPragma || "React.createElement"); + const [fragmentBase, fragmentSuffix] = splitPragma(options.jsxFragmentPragma || "React.Fragment"); + return {base, suffix, fragmentBase, fragmentSuffix}; +} exports.default = getJSXPragmaInfo; + +function splitPragma(pragma) { + let dotIndex = pragma.indexOf("."); + if (dotIndex === -1) { + dotIndex = pragma.length; + } + return [pragma.slice(0, dotIndex), pragma.slice(dotIndex)]; +} Index: frontend/node_modules/sucrase/dist/util/getNonTypeIdentifiers.js =================================================================== --- frontend/node_modules/sucrase/dist/util/getNonTypeIdentifiers.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/util/getNonTypeIdentifiers.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,43 @@ +"use strict";Object.defineProperty(exports, "__esModule", {value: true}); function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; } +var _tokenizer = require('../parser/tokenizer'); +var _types = require('../parser/tokenizer/types'); + +var _JSXTransformer = require('../transformers/JSXTransformer'); +var _getJSXPragmaInfo = require('./getJSXPragmaInfo'); var _getJSXPragmaInfo2 = _interopRequireDefault(_getJSXPragmaInfo); + + function getNonTypeIdentifiers(tokens, options) { + const jsxPragmaInfo = _getJSXPragmaInfo2.default.call(void 0, options); + const nonTypeIdentifiers = new Set(); + for (let i = 0; i < tokens.tokens.length; i++) { + const token = tokens.tokens[i]; + if ( + token.type === _types.TokenType.name && + !token.isType && + (token.identifierRole === _tokenizer.IdentifierRole.Access || + token.identifierRole === _tokenizer.IdentifierRole.ObjectShorthand || + token.identifierRole === _tokenizer.IdentifierRole.ExportAccess) && + !token.shadowsGlobal + ) { + nonTypeIdentifiers.add(tokens.identifierNameForToken(token)); + } + if (token.type === _types.TokenType.jsxTagStart) { + nonTypeIdentifiers.add(jsxPragmaInfo.base); + } + if ( + token.type === _types.TokenType.jsxTagStart && + i + 1 < tokens.tokens.length && + tokens.tokens[i + 1].type === _types.TokenType.jsxTagEnd + ) { + nonTypeIdentifiers.add(jsxPragmaInfo.base); + nonTypeIdentifiers.add(jsxPragmaInfo.fragmentBase); + } + if (token.type === _types.TokenType.jsxName && token.identifierRole === _tokenizer.IdentifierRole.Access) { + const identifierName = tokens.identifierNameForToken(token); + // Lower-case single-component tag names like "div" don't count. + if (!_JSXTransformer.startsWithLowerCase.call(void 0, identifierName) || tokens.tokens[i + 1].type === _types.TokenType.dot) { + nonTypeIdentifiers.add(tokens.identifierNameForToken(token)); + } + } + } + return nonTypeIdentifiers; +} exports.getNonTypeIdentifiers = getNonTypeIdentifiers; Index: frontend/node_modules/sucrase/dist/util/getTSImportedNames.js =================================================================== --- frontend/node_modules/sucrase/dist/util/getTSImportedNames.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/util/getTSImportedNames.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,84 @@ +"use strict";Object.defineProperty(exports, "__esModule", {value: true}); function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }var _types = require('../parser/tokenizer/types'); + +var _getImportExportSpecifierInfo = require('./getImportExportSpecifierInfo'); var _getImportExportSpecifierInfo2 = _interopRequireDefault(_getImportExportSpecifierInfo); + +/** + * Special case code to scan for imported names in ESM TypeScript. We need to do this so we can + * properly get globals so we can compute shadowed globals. + * + * This is similar to logic in CJSImportProcessor, but trimmed down to avoid logic with CJS + * replacement and flow type imports. + */ + function getTSImportedNames(tokens) { + const importedNames = new Set(); + for (let i = 0; i < tokens.tokens.length; i++) { + if ( + tokens.matches1AtIndex(i, _types.TokenType._import) && + !tokens.matches3AtIndex(i, _types.TokenType._import, _types.TokenType.name, _types.TokenType.eq) + ) { + collectNamesForImport(tokens, i, importedNames); + } + } + return importedNames; +} exports.default = getTSImportedNames; + +function collectNamesForImport( + tokens, + index, + importedNames, +) { + index++; + + if (tokens.matches1AtIndex(index, _types.TokenType.parenL)) { + // Dynamic import, so nothing to do + return; + } + + if (tokens.matches1AtIndex(index, _types.TokenType.name)) { + importedNames.add(tokens.identifierNameAtIndex(index)); + index++; + if (tokens.matches1AtIndex(index, _types.TokenType.comma)) { + index++; + } + } + + if (tokens.matches1AtIndex(index, _types.TokenType.star)) { + // * as + index += 2; + importedNames.add(tokens.identifierNameAtIndex(index)); + index++; + } + + if (tokens.matches1AtIndex(index, _types.TokenType.braceL)) { + index++; + collectNamesForNamedImport(tokens, index, importedNames); + } +} + +function collectNamesForNamedImport( + tokens, + index, + importedNames, +) { + while (true) { + if (tokens.matches1AtIndex(index, _types.TokenType.braceR)) { + return; + } + + const specifierInfo = _getImportExportSpecifierInfo2.default.call(void 0, tokens, index); + index = specifierInfo.endIndex; + if (!specifierInfo.isType) { + importedNames.add(specifierInfo.rightName); + } + + if (tokens.matches2AtIndex(index, _types.TokenType.comma, _types.TokenType.braceR)) { + return; + } else if (tokens.matches1AtIndex(index, _types.TokenType.braceR)) { + return; + } else if (tokens.matches1AtIndex(index, _types.TokenType.comma)) { + index++; + } else { + throw new Error(`Unexpected token: ${JSON.stringify(tokens.tokens[index])}`); + } + } +} Index: frontend/node_modules/sucrase/dist/util/isAsyncOperation.js =================================================================== --- frontend/node_modules/sucrase/dist/util/isAsyncOperation.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/util/isAsyncOperation.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,38 @@ +"use strict";Object.defineProperty(exports, "__esModule", {value: true});var _keywords = require('../parser/tokenizer/keywords'); + + +/** + * Determine whether this optional chain or nullish coalescing operation has any await statements in + * it. If so, we'll need to transpile to an async operation. + * + * We compute this by walking the length of the operation and returning true if we see an await + * keyword used as a real await (rather than an object key or property access). Nested optional + * chain/nullish operations need to be tracked but don't silence await, but a nested async function + * (or any other nested scope) will make the await not count. + */ + function isAsyncOperation(tokens) { + let index = tokens.currentIndex(); + let depth = 0; + const startToken = tokens.currentToken(); + do { + const token = tokens.tokens[index]; + if (token.isOptionalChainStart) { + depth++; + } + if (token.isOptionalChainEnd) { + depth--; + } + depth += token.numNullishCoalesceStarts; + depth -= token.numNullishCoalesceEnds; + + if ( + token.contextualKeyword === _keywords.ContextualKeyword._await && + token.identifierRole == null && + token.scopeDepth === startToken.scopeDepth + ) { + return true; + } + index += 1; + } while (depth > 0 && index < tokens.tokens.length); + return false; +} exports.default = isAsyncOperation; Index: frontend/node_modules/sucrase/dist/util/isExportFrom.js =================================================================== --- frontend/node_modules/sucrase/dist/util/isExportFrom.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/util/isExportFrom.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,18 @@ +"use strict";Object.defineProperty(exports, "__esModule", {value: true});var _keywords = require('../parser/tokenizer/keywords'); +var _types = require('../parser/tokenizer/types'); + + +/** + * Starting at `export {`, look ahead and return `true` if this is an + * `export {...} from` statement and `false` if this is a plain multi-export. + */ + function isExportFrom(tokens) { + let closeBraceIndex = tokens.currentIndex(); + while (!tokens.matches1AtIndex(closeBraceIndex, _types.TokenType.braceR)) { + closeBraceIndex++; + } + return ( + tokens.matchesContextualAtIndex(closeBraceIndex + 1, _keywords.ContextualKeyword._from) && + tokens.matches1AtIndex(closeBraceIndex + 2, _types.TokenType.string) + ); +} exports.default = isExportFrom; Index: frontend/node_modules/sucrase/dist/util/isIdentifier.js =================================================================== --- frontend/node_modules/sucrase/dist/util/isIdentifier.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/util/isIdentifier.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,81 @@ +"use strict";Object.defineProperty(exports, "__esModule", {value: true});var _identifier = require('../parser/util/identifier'); + +// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Lexical_grammar +// Hard-code a list of reserved words rather than trying to use keywords or contextual keywords +// from the parser, since currently there are various exceptions, like `package` being reserved +// but unused and various contextual keywords being reserved. Note that we assume that all code +// compiled by Sucrase is in a module, so strict mode words and await are all considered reserved +// here. +const RESERVED_WORDS = new Set([ + // Reserved keywords as of ECMAScript 2015 + "break", + "case", + "catch", + "class", + "const", + "continue", + "debugger", + "default", + "delete", + "do", + "else", + "export", + "extends", + "finally", + "for", + "function", + "if", + "import", + "in", + "instanceof", + "new", + "return", + "super", + "switch", + "this", + "throw", + "try", + "typeof", + "var", + "void", + "while", + "with", + "yield", + // Future reserved keywords + "enum", + "implements", + "interface", + "let", + "package", + "private", + "protected", + "public", + "static", + "await", + // Literals that cannot be used as identifiers + "false", + "null", + "true", +]); + +/** + * Determine if the given name is a legal variable name. + * + * This is needed when transforming TypeScript enums; if an enum key is a valid + * variable name, it might be referenced later in the enum, so we need to + * declare a variable. + */ + function isIdentifier(name) { + if (name.length === 0) { + return false; + } + if (!_identifier.IS_IDENTIFIER_START[name.charCodeAt(0)]) { + return false; + } + for (let i = 1; i < name.length; i++) { + if (!_identifier.IS_IDENTIFIER_CHAR[name.charCodeAt(i)]) { + return false; + } + } + return !RESERVED_WORDS.has(name); +} exports.default = isIdentifier; Index: frontend/node_modules/sucrase/dist/util/removeMaybeImportAttributes.js =================================================================== --- frontend/node_modules/sucrase/dist/util/removeMaybeImportAttributes.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/util/removeMaybeImportAttributes.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,22 @@ +"use strict";Object.defineProperty(exports, "__esModule", {value: true});var _keywords = require('../parser/tokenizer/keywords'); +var _types = require('../parser/tokenizer/types'); + + +/** + * Starting at a potential `with` or (legacy) `assert` token, remove the import + * attributes if they exist. + */ + function removeMaybeImportAttributes(tokens) { + if ( + tokens.matches2(_types.TokenType._with, _types.TokenType.braceL) || + (tokens.matches2(_types.TokenType.name, _types.TokenType.braceL) && tokens.matchesContextual(_keywords.ContextualKeyword._assert)) + ) { + // assert + tokens.removeToken(); + // { + tokens.removeToken(); + tokens.removeBalancedCode(); + // } + tokens.removeToken(); + } +} exports.removeMaybeImportAttributes = removeMaybeImportAttributes; Index: frontend/node_modules/sucrase/dist/util/shouldElideDefaultExport.js =================================================================== --- frontend/node_modules/sucrase/dist/util/shouldElideDefaultExport.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/dist/util/shouldElideDefaultExport.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,38 @@ +"use strict";Object.defineProperty(exports, "__esModule", {value: true});var _types = require('../parser/tokenizer/types'); + + + +/** + * Common method sharing code between CJS and ESM cases, since they're the same here. + */ + function shouldElideDefaultExport( + isTypeScriptTransformEnabled, + keepUnusedImports, + tokens, + declarationInfo, +) { + if (!isTypeScriptTransformEnabled || keepUnusedImports) { + return false; + } + const exportToken = tokens.currentToken(); + if (exportToken.rhsEndIndex == null) { + throw new Error("Expected non-null rhsEndIndex on export token."); + } + // The export must be of the form `export default a` or `export default a;`. + const numTokens = exportToken.rhsEndIndex - tokens.currentIndex(); + if ( + numTokens !== 3 && + !(numTokens === 4 && tokens.matches1AtIndex(exportToken.rhsEndIndex - 1, _types.TokenType.semi)) + ) { + return false; + } + const identifierToken = tokens.tokenAtRelativeIndex(2); + if (identifierToken.type !== _types.TokenType.name) { + return false; + } + const exportedName = tokens.identifierNameForToken(identifierToken); + return ( + declarationInfo.typeDeclarations.has(exportedName) && + !declarationInfo.valueDeclarations.has(exportedName) + ); +} exports.default = shouldElideDefaultExport; Index: frontend/node_modules/sucrase/node_modules/commander/CHANGELOG.md =================================================================== --- frontend/node_modules/sucrase/node_modules/commander/CHANGELOG.md (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/node_modules/commander/CHANGELOG.md (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,436 @@ +# Changelog + +All notable changes to this project will be documented in this file. + +The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/) +and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html). (Format adopted after v3.0.0.) + + + +## [4.1.1] (2020-02-02) + +### Fixed + +* TypeScript definition for `.action()` should include Promise for async ([#1157]) + +## [4.1.0] (2020-01-06) + +### Added + +* two routines to change how option values are handled, and eliminate name clashes with command properties ([#933] [#1102]) + * see storeOptionsAsProperties and passCommandToAction in README +* `.parseAsync` to use instead of `.parse` if supply async action handlers ([#806] [#1118]) + +### Fixed + +* Remove trailing blanks from wrapped help text ([#1096]) + +### Changed + +* update dependencies +* extend security coverage for Commander 2.x to 2020-02-03 +* improvements to README +* improvements to TypeScript definition documentation +* move old versions out of main CHANGELOG +* removed explicit use of `ts-node` in tests + +## [4.0.1] (2019-11-12) + +### Fixed + +* display help when requested, even if there are missing required options ([#1091]) + +## [4.0.0] (2019-11-02) + +### Added + +* automatically wrap and indent help descriptions for options and commands ([#1051]) +* `.exitOverride()` allows override of calls to `process.exit` for additional error handling and to keep program running ([#1040]) +* support for declaring required options with `.requiredOptions()` ([#1071]) +* GitHub Actions support ([#1027]) +* translation links in README + +### Changed + +* dev: switch tests from Sinon+Should to Jest with major rewrite of tests ([#1035]) +* call default subcommand even when there are unknown options ([#1047]) +* *Breaking* Commander is only officially supported on Node 8 and above, and requires Node 6 ([#1053]) + +### Fixed + +* *Breaking* keep command object out of program.args when action handler called ([#1048]) + * also, action handler now passed array of unknown arguments +* complain about unknown options when program argument supplied and action handler ([#1049]) + * this changes parameters to `command:*` event to include unknown arguments +* removed deprecated `customFds` option from call to `child_process.spawn` ([#1052]) +* rework TypeScript declarations to bring all types into imported namespace ([#1081]) + +### Migration Tips + +#### Testing for no arguments + +If you were previously using code like: + +```js +if (!program.args.length) ... +``` + +a partial replacement is: + +```js +if (program.rawArgs.length < 3) ... +``` + +## [4.0.0-1] Prerelease (2019-10-08) + +(Released in 4.0.0) + +## [4.0.0-0] Prerelease (2019-10-01) + +(Released in 4.0.0) + +## [2.20.1] (2019-09-29) + +### Fixed + +* Improve tracking of executable subcommands. + +### Changed + +* update development dependencies + +## [3.0.2] (2019-09-27) + +### Fixed + +* Improve tracking of executable subcommands. + +### Changed + +* update development dependencies + +## [3.0.1] (2019-08-30) + +### Added + +* .name and .usage to README ([#1010]) +* Table of Contents to README ([#1010]) +* TypeScript definition for `executableFile` in CommandOptions ([#1028]) + +### Changed + +* consistently use `const` rather than `var` in README ([#1026]) + +### Fixed + +* help for sub commands with custom executableFile ([#1018]) + +## [3.0.0] / 2019-08-08 + +* Add option to specify executable file name ([#999]) + * e.g. `.command('clone', 'clone description', { executableFile: 'myClone' })` +* Change docs for `.command` to contrast action handler vs git-style executable. ([#938] [#990]) +* **Breaking** Change TypeScript to use overloaded function for `.command`. ([#938] [#990]) +* Change to use straight quotes around strings in error messages (like 'this' instead of `this') ([#915]) +* Add TypeScript "reference types" for node ([#974]) +* Add support for hyphen as an option argument in subcommands ([#697]) +* Add support for a short option flag and its value to be concatenated for action handler subcommands ([#599]) + * e.g. `-p 80` can also be supplied as `-p80` +* Add executable arguments to spawn in win32, for git-style executables ([#611]) + * e.g. `node --harmony myCommand.js clone` +* Add parent command as prefix of subcommand in help ([#980]) +* Add optional custom description to `.version` ([#963]) + * e.g. `program.version('0.0.1', '-v, --vers', 'output the current version')` +* Add `.helpOption(flags, description)` routine to customise help flags and description ([#963]) + * e.g. `.helpOption('-e, --HELP', 'read more information')` +* Fix behavior of --no-* options ([#795]) + * can now define both `--foo` and `--no-foo` + * **Breaking** custom event listeners: `--no-foo` on cli now emits `option:no-foo` (previously `option:foo`) + * **Breaking** default value: defining `--no-foo` after defining `--foo` leaves the default value unchanged (previously set it to false) + * allow boolean default value, such as from environment ([#987]) +* Increment inspector port for spawned subcommands ([#991]) + * e.g. `node --inspect myCommand.js clone` + +### Migration Tips + +The custom event for a negated option like `--no-foo` is `option:no-foo` (previously `option:foo`). + +```js +program + .option('--no-foo') + .on('option:no-foo', () => { + console.log('removing foo'); + }); +``` + +When using TypeScript, adding a command does not allow an explicit `undefined` for an unwanted executable description (e.g +for a command with an action handler). + +```js +program + .command('action1', undefined, { noHelp: true }) // No longer valid + .command('action2', { noHelp: true }) // Correct +``` + +## 3.0.0-0 Prerelease / 2019-07-28 + +(Released as 3.0.0) + +## 2.20.0 / 2019-04-02 + +* fix: resolve symbolic links completely when hunting for subcommands (#935) +* Update index.d.ts (#930) +* Update Readme.md (#924) +* Remove --save option as it isn't required anymore (#918) +* Add link to the license file (#900) +* Added example of receiving args from options (#858) +* Added missing semicolon (#882) +* Add extension to .eslintrc (#876) + +## 2.19.0 / 2018-10-02 + +* Removed newline after Options and Commands headers (#864) +* Bugfix - Error output (#862) +* Fix to change default value to string (#856) + +## 2.18.0 / 2018-09-07 + +* Standardize help output (#853) +* chmod 644 travis.yml (#851) +* add support for execute typescript subcommand via ts-node (#849) + +## 2.17.1 / 2018-08-07 + +* Fix bug in command emit (#844) + +## 2.17.0 / 2018-08-03 + +* fixed newline output after help information (#833) +* Fix to emit the action even without command (#778) +* npm update (#823) + +## 2.16.0 / 2018-06-29 + +* Remove Makefile and `test/run` (#821) +* Make 'npm test' run on Windows (#820) +* Add badge to display install size (#807) +* chore: cache node_modules (#814) +* chore: remove Node.js 4 (EOL), add Node.js 10 (#813) +* fixed typo in readme (#812) +* Fix types (#804) +* Update eslint to resolve vulnerabilities in lodash (#799) +* updated readme with custom event listeners. (#791) +* fix tests (#794) + +## 2.15.0 / 2018-03-07 + +* Update downloads badge to point to graph of downloads over time instead of duplicating link to npm +* Arguments description + +## 2.14.1 / 2018-02-07 + +* Fix typing of help function + +## 2.14.0 / 2018-02-05 + +* only register the option:version event once +* Fixes issue #727: Passing empty string for option on command is set to undefined +* enable eqeqeq rule +* resolves #754 add linter configuration to project +* resolves #560 respect custom name for version option +* document how to override the version flag +* document using options per command + +## 2.13.0 / 2018-01-09 + +* Do not print default for --no- +* remove trailing spaces in command help +* Update CI's Node.js to LTS and latest version +* typedefs: Command and Option types added to commander namespace + +## 2.12.2 / 2017-11-28 + +* fix: typings are not shipped + +## 2.12.1 / 2017-11-23 + +* Move @types/node to dev dependency + +## 2.12.0 / 2017-11-22 + +* add attributeName() method to Option objects +* Documentation updated for options with --no prefix +* typings: `outputHelp` takes a string as the first parameter +* typings: use overloads +* feat(typings): update to match js api +* Print default value in option help +* Fix translation error +* Fail when using same command and alias (#491) +* feat(typings): add help callback +* fix bug when description is add after command with options (#662) +* Format js code +* Rename History.md to CHANGELOG.md (#668) +* feat(typings): add typings to support TypeScript (#646) +* use current node + +## 2.11.0 / 2017-07-03 + +* Fix help section order and padding (#652) +* feature: support for signals to subcommands (#632) +* Fixed #37, --help should not display first (#447) +* Fix translation errors. (#570) +* Add package-lock.json +* Remove engines +* Upgrade package version +* Prefix events to prevent conflicts between commands and options (#494) +* Removing dependency on graceful-readlink +* Support setting name in #name function and make it chainable +* Add .vscode directory to .gitignore (Visual Studio Code metadata) +* Updated link to ruby commander in readme files + +## 2.10.0 / 2017-06-19 + +* Update .travis.yml. drop support for older node.js versions. +* Fix require arguments in README.md +* On SemVer you do not start from 0.0.1 +* Add missing semi colon in readme +* Add save param to npm install +* node v6 travis test +* Update Readme_zh-CN.md +* Allow literal '--' to be passed-through as an argument +* Test subcommand alias help +* link build badge to master branch +* Support the alias of Git style sub-command +* added keyword commander for better search result on npm +* Fix Sub-Subcommands +* test node.js stable +* Fixes TypeError when a command has an option called `--description` +* Update README.md to make it beginner friendly and elaborate on the difference between angled and square brackets. +* Add chinese Readme file + +## 2.9.0 / 2015-10-13 + +* Add option `isDefault` to set default subcommand #415 @Qix- +* Add callback to allow filtering or post-processing of help text #434 @djulien +* Fix `undefined` text in help information close #414 #416 @zhiyelee + +## 2.8.1 / 2015-04-22 + +* Back out `support multiline description` Close #396 #397 + +## 2.8.0 / 2015-04-07 + +* Add `process.execArg` support, execution args like `--harmony` will be passed to sub-commands #387 @DigitalIO @zhiyelee +* Fix bug in Git-style sub-commands #372 @zhiyelee +* Allow commands to be hidden from help #383 @tonylukasavage +* When git-style sub-commands are in use, yet none are called, display help #382 @claylo +* Add ability to specify arguments syntax for top-level command #258 @rrthomas +* Support multiline descriptions #208 @zxqfox + +## 2.7.1 / 2015-03-11 + +* Revert #347 (fix collisions when option and first arg have same name) which causes a bug in #367. + +## 2.7.0 / 2015-03-09 + +* Fix git-style bug when installed globally. Close #335 #349 @zhiyelee +* Fix collisions when option and first arg have same name. Close #346 #347 @tonylukasavage +* Add support for camelCase on `opts()`. Close #353 @nkzawa +* Add node.js 0.12 and io.js to travis.yml +* Allow RegEx options. #337 @palanik +* Fixes exit code when sub-command failing. Close #260 #332 @pirelenito +* git-style `bin` files in $PATH make sense. Close #196 #327 @zhiyelee + +## 2.6.0 / 2014-12-30 + +* added `Command#allowUnknownOption` method. Close #138 #318 @doozr @zhiyelee +* Add application description to the help msg. Close #112 @dalssoft + +## 2.5.1 / 2014-12-15 + +* fixed two bugs incurred by variadic arguments. Close #291 @Quentin01 #302 @zhiyelee + +## 2.5.0 / 2014-10-24 + +* add support for variadic arguments. Closes #277 @whitlockjc + +## 2.4.0 / 2014-10-17 + +* fixed a bug on executing the coercion function of subcommands option. Closes #270 +* added `Command.prototype.name` to retrieve command name. Closes #264 #266 @tonylukasavage +* added `Command.prototype.opts` to retrieve all the options as a simple object of key-value pairs. Closes #262 @tonylukasavage +* fixed a bug on subcommand name. Closes #248 @jonathandelgado +* fixed function normalize doesn’t honor option terminator. Closes #216 @abbr + +## 2.3.0 / 2014-07-16 + +* add command alias'. Closes PR #210 +* fix: Typos. Closes #99 +* fix: Unused fs module. Closes #217 + +## 2.2.0 / 2014-03-29 + +* add passing of previous option value +* fix: support subcommands on windows. Closes #142 +* Now the defaultValue passed as the second argument of the coercion function. + +## 2.1.0 / 2013-11-21 + +* add: allow cflag style option params, unit test, fixes #174 + +## 2.0.0 / 2013-07-18 + +* remove input methods (.prompt, .confirm, etc) + +## Older versions + +* [1.x](./changelogs/CHANGELOG-1.md) +* [0.x](./changelogs/CHANGELOG-0.md) + +[#599]: https://github.com/tj/commander.js/issues/599 +[#611]: https://github.com/tj/commander.js/issues/611 +[#697]: https://github.com/tj/commander.js/issues/697 +[#795]: https://github.com/tj/commander.js/issues/795 +[#806]: https://github.com/tj/commander.js/issues/806 +[#915]: https://github.com/tj/commander.js/issues/915 +[#938]: https://github.com/tj/commander.js/issues/938 +[#963]: https://github.com/tj/commander.js/issues/963 +[#974]: https://github.com/tj/commander.js/issues/974 +[#980]: https://github.com/tj/commander.js/issues/980 +[#987]: https://github.com/tj/commander.js/issues/987 +[#990]: https://github.com/tj/commander.js/issues/990 +[#991]: https://github.com/tj/commander.js/issues/991 +[#993]: https://github.com/tj/commander.js/issues/993 +[#999]: https://github.com/tj/commander.js/issues/999 +[#1010]: https://github.com/tj/commander.js/pull/1010 +[#1018]: https://github.com/tj/commander.js/pull/1018 +[#1026]: https://github.com/tj/commander.js/pull/1026 +[#1027]: https://github.com/tj/commander.js/pull/1027 +[#1028]: https://github.com/tj/commander.js/pull/1028 +[#1035]: https://github.com/tj/commander.js/pull/1035 +[#1040]: https://github.com/tj/commander.js/pull/1040 +[#1047]: https://github.com/tj/commander.js/pull/1047 +[#1048]: https://github.com/tj/commander.js/pull/1048 +[#1049]: https://github.com/tj/commander.js/pull/1049 +[#1051]: https://github.com/tj/commander.js/pull/1051 +[#1052]: https://github.com/tj/commander.js/pull/1052 +[#1053]: https://github.com/tj/commander.js/pull/1053 +[#1071]: https://github.com/tj/commander.js/pull/1071 +[#1081]: https://github.com/tj/commander.js/pull/1081 +[#1091]: https://github.com/tj/commander.js/pull/1091 +[#1096]: https://github.com/tj/commander.js/pull/1096 +[#1102]: https://github.com/tj/commander.js/pull/1102 +[#1118]: https://github.com/tj/commander.js/pull/1118 +[#1157]: https://github.com/tj/commander.js/pull/1157 + +[Unreleased]: https://github.com/tj/commander.js/compare/master...develop +[4.1.1]: https://github.com/tj/commander.js/compare/v4.0.0..v4.1.1 +[4.1.0]: https://github.com/tj/commander.js/compare/v4.0.1..v4.1.0 +[4.0.1]: https://github.com/tj/commander.js/compare/v4.0.0..v4.0.1 +[4.0.0]: https://github.com/tj/commander.js/compare/v3.0.2..v4.0.0 +[4.0.0-1]: https://github.com/tj/commander.js/compare/v4.0.0-0..v4.0.0-1 +[4.0.0-0]: https://github.com/tj/commander.js/compare/v3.0.2...v4.0.0-0 +[3.0.2]: https://github.com/tj/commander.js/compare/v3.0.1...v3.0.2 +[3.0.1]: https://github.com/tj/commander.js/compare/v3.0.0...v3.0.1 +[3.0.0]: https://github.com/tj/commander.js/compare/v2.20.1...v3.0.0 +[2.20.1]: https://github.com/tj/commander.js/compare/v2.20.0...v2.20.1 Index: frontend/node_modules/sucrase/node_modules/commander/LICENSE =================================================================== --- frontend/node_modules/sucrase/node_modules/commander/LICENSE (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/node_modules/commander/LICENSE (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,22 @@ +(The MIT License) + +Copyright (c) 2011 TJ Holowaychuk + +Permission is hereby granted, free of charge, to any person obtaining +a copy of this software and associated documentation files (the +'Software'), to deal in the Software without restriction, including +without limitation the rights to use, copy, modify, merge, publish, +distribute, sublicense, and/or sell copies of the Software, and to +permit persons to whom the Software is furnished to do so, subject to +the following conditions: + +The above copyright notice and this permission notice shall be +included in all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, +EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. +IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY +CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, +TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE +SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. Index: frontend/node_modules/sucrase/node_modules/commander/Readme.md =================================================================== --- frontend/node_modules/sucrase/node_modules/commander/Readme.md (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/node_modules/commander/Readme.md (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,713 @@ +# Commander.js + +[![Build Status](https://api.travis-ci.org/tj/commander.js.svg?branch=master)](http://travis-ci.org/tj/commander.js) +[![NPM Version](http://img.shields.io/npm/v/commander.svg?style=flat)](https://www.npmjs.org/package/commander) +[![NPM Downloads](https://img.shields.io/npm/dm/commander.svg?style=flat)](https://npmcharts.com/compare/commander?minimal=true) +[![Install Size](https://packagephobia.now.sh/badge?p=commander)](https://packagephobia.now.sh/result?p=commander) + +The complete solution for [node.js](http://nodejs.org) command-line interfaces, inspired by Ruby's [commander](https://github.com/commander-rb/commander). + +Read this in other languages: English | [简体中文](./Readme_zh-CN.md) + +- [Commander.js](#commanderjs) + - [Installation](#installation) + - [Declaring program variable](#declaring-program-variable) + - [Options](#options) + - [Common option types, boolean and value](#common-option-types-boolean-and-value) + - [Default option value](#default-option-value) + - [Other option types, negatable boolean and flag|value](#other-option-types-negatable-boolean-and-flagvalue) + - [Custom option processing](#custom-option-processing) + - [Required option](#required-option) + - [Version option](#version-option) + - [Commands](#commands) + - [Specify the argument syntax](#specify-the-argument-syntax) + - [Action handler (sub)commands](#action-handler-subcommands) + - [Git-style executable (sub)commands](#git-style-executable-subcommands) + - [Automated --help](#automated---help) + - [Custom help](#custom-help) + - [.usage and .name](#usage-and-name) + - [.outputHelp(cb)](#outputhelpcb) + - [.helpOption(flags, description)](#helpoptionflags-description) + - [.help(cb)](#helpcb) + - [Custom event listeners](#custom-event-listeners) + - [Bits and pieces](#bits-and-pieces) + - [Avoiding option name clashes](#avoiding-option-name-clashes) + - [TypeScript](#typescript) + - [Node options such as --harmony](#node-options-such-as---harmony) + - [Node debugging](#node-debugging) + - [Override exit handling](#override-exit-handling) + - [Examples](#examples) + - [License](#license) + - [Support](#support) + - [Commander for enterprise](#commander-for-enterprise) + +## Installation + +```bash +npm install commander +``` + +## Declaring _program_ variable + +Commander exports a global object which is convenient for quick programs. +This is used in the examples in this README for brevity. + +```js +const program = require('commander'); +program.version('0.0.1'); +``` + +For larger programs which may use commander in multiple ways, including unit testing, it is better to create a local Command object to use. + + ```js + const commander = require('commander'); + const program = new commander.Command(); + program.version('0.0.1'); + ``` + +## Options + +Options are defined with the `.option()` method, also serving as documentation for the options. Each option can have a short flag (single character) and a long name, separated by a comma or space. + +The options can be accessed as properties on the Command object. Multi-word options such as "--template-engine" are camel-cased, becoming `program.templateEngine` etc. Multiple short flags may be combined as a single arg, for example `-abc` is equivalent to `-a -b -c`. + +See also optional new behaviour to [avoid name clashes](#avoiding-option-name-clashes). + +### Common option types, boolean and value + +The two most used option types are a boolean flag, and an option which takes a value (declared using angle brackets). Both are `undefined` unless specified on command line. + +```js +const program = require('commander'); + +program + .option('-d, --debug', 'output extra debugging') + .option('-s, --small', 'small pizza size') + .option('-p, --pizza-type ', 'flavour of pizza'); + +program.parse(process.argv); + +if (program.debug) console.log(program.opts()); +console.log('pizza details:'); +if (program.small) console.log('- small pizza size'); +if (program.pizzaType) console.log(`- ${program.pizzaType}`); +``` + +```bash +$ pizza-options -d +{ debug: true, small: undefined, pizzaType: undefined } +pizza details: +$ pizza-options -p +error: option '-p, --pizza-type ' argument missing +$ pizza-options -ds -p vegetarian +{ debug: true, small: true, pizzaType: 'vegetarian' } +pizza details: +- small pizza size +- vegetarian +$ pizza-options --pizza-type=cheese +pizza details: +- cheese +``` + +`program.parse(arguments)` processes the arguments, leaving any args not consumed by the options as the `program.args` array. + +### Default option value + +You can specify a default value for an option which takes a value. + +```js +const program = require('commander'); + +program + .option('-c, --cheese ', 'add the specified type of cheese', 'blue'); + +program.parse(process.argv); + +console.log(`cheese: ${program.cheese}`); +``` + +```bash +$ pizza-options +cheese: blue +$ pizza-options --cheese stilton +cheese: stilton +``` + +### Other option types, negatable boolean and flag|value + +You can specify a boolean option long name with a leading `no-` to set the option value to false when used. +Defined alone this also makes the option true by default. + +If you define `--foo` first, adding `--no-foo` does not change the default value from what it would +otherwise be. You can specify a default boolean value for a boolean flag and it can be overridden on command line. + +```js +const program = require('commander'); + +program + .option('--no-sauce', 'Remove sauce') + .option('--cheese ', 'cheese flavour', 'mozzarella') + .option('--no-cheese', 'plain with no cheese') + .parse(process.argv); + +const sauceStr = program.sauce ? 'sauce' : 'no sauce'; +const cheeseStr = (program.cheese === false) ? 'no cheese' : `${program.cheese} cheese`; +console.log(`You ordered a pizza with ${sauceStr} and ${cheeseStr}`); +``` + +```bash +$ pizza-options +You ordered a pizza with sauce and mozzarella cheese +$ pizza-options --sauce +error: unknown option '--sauce' +$ pizza-options --cheese=blue +You ordered a pizza with sauce and blue cheese +$ pizza-options --no-sauce --no-cheese +You ordered a pizza with no sauce and no cheese +``` + +You can specify an option which functions as a flag but may also take a value (declared using square brackets). + +```js +const program = require('commander'); + +program + .option('-c, --cheese [type]', 'Add cheese with optional type'); + +program.parse(process.argv); + +if (program.cheese === undefined) console.log('no cheese'); +else if (program.cheese === true) console.log('add cheese'); +else console.log(`add cheese type ${program.cheese}`); +``` + +```bash +$ pizza-options +no cheese +$ pizza-options --cheese +add cheese +$ pizza-options --cheese mozzarella +add cheese type mozzarella +``` + +### Custom option processing + +You may specify a function to do custom processing of option values. The callback function receives two parameters, the user specified value and the +previous value for the option. It returns the new value for the option. + +This allows you to coerce the option value to the desired type, or accumulate values, or do entirely custom processing. + +You can optionally specify the default/starting value for the option after the function. + +```js +const program = require('commander'); + +function myParseInt(value, dummyPrevious) { + // parseInt takes a string and an optional radix + return parseInt(value); +} + +function increaseVerbosity(dummyValue, previous) { + return previous + 1; +} + +function collect(value, previous) { + return previous.concat([value]); +} + +function commaSeparatedList(value, dummyPrevious) { + return value.split(','); +} + +program + .option('-f, --float ', 'float argument', parseFloat) + .option('-i, --integer ', 'integer argument', myParseInt) + .option('-v, --verbose', 'verbosity that can be increased', increaseVerbosity, 0) + .option('-c, --collect ', 'repeatable value', collect, []) + .option('-l, --list ', 'comma separated list', commaSeparatedList) +; + +program.parse(process.argv); + +if (program.float !== undefined) console.log(`float: ${program.float}`); +if (program.integer !== undefined) console.log(`integer: ${program.integer}`); +if (program.verbose > 0) console.log(`verbosity: ${program.verbose}`); +if (program.collect.length > 0) console.log(program.collect); +if (program.list !== undefined) console.log(program.list); +``` + +```bash +$ custom -f 1e2 +float: 100 +$ custom --integer 2 +integer: 2 +$ custom -v -v -v +verbose: 3 +$ custom -c a -c b -c c +[ 'a', 'b', 'c' ] +$ custom --list x,y,z +[ 'x', 'y', 'z' ] +``` + +### Required option + +You may specify a required (mandatory) option using `.requiredOption`. The option must be specified on the command line, or by having a default value. The method is otherwise the same as `.option` in format, taking flags and description, and optional default value or custom processing. + +```js +const program = require('commander'); + +program + .requiredOption('-c, --cheese ', 'pizza must have cheese'); + +program.parse(process.argv); +``` + +``` +$ pizza +error: required option '-c, --cheese ' not specified +``` + +### Version option + +The optional `version` method adds handling for displaying the command version. The default option flags are `-V` and `--version`, and when present the command prints the version number and exits. + +```js +program.version('0.0.1'); +``` + +```bash +$ ./examples/pizza -V +0.0.1 +``` + +You may change the flags and description by passing additional parameters to the `version` method, using +the same syntax for flags as the `option` method. The version flags can be named anything, but a long name is required. + +```js +program.version('0.0.1', '-v, --vers', 'output the current version'); +``` + +## Commands + +You can specify (sub)commands for your top-level command using `.command`. There are two ways these can be implemented: using an action handler attached to the command, or as a separate executable file (described in more detail later). In the first parameter to `.command` you specify the command name and any command arguments. The arguments may be `` or `[optional]`, and the last argument may also be `variadic...`. + +For example: + +```js +// Command implemented using action handler (description is supplied separately to `.command`) +// Returns new command for configuring. +program + .command('clone [destination]') + .description('clone a repository into a newly created directory') + .action((source, destination) => { + console.log('clone command called'); + }); + +// Command implemented using separate executable file (description is second parameter to `.command`) +// Returns top-level command for adding more commands. +program + .command('start ', 'start named service') + .command('stop [service]', 'stop named service, or all if no name supplied'); +``` + +### Specify the argument syntax + +You use `.arguments` to specify the arguments for the top-level command, and for subcommands they are included in the `.command` call. Angled brackets (e.g. ``) indicate required input. Square brackets (e.g. `[optional]`) indicate optional input. + +```js +const program = require('commander'); + +program + .version('0.1.0') + .arguments(' [env]') + .action(function (cmd, env) { + cmdValue = cmd; + envValue = env; + }); + +program.parse(process.argv); + +if (typeof cmdValue === 'undefined') { + console.error('no command given!'); + process.exit(1); +} +console.log('command:', cmdValue); +console.log('environment:', envValue || "no environment given"); +``` + + The last argument of a command can be variadic, and only the last argument. To make an argument variadic you + append `...` to the argument name. For example: + +```js +const program = require('commander'); + +program + .version('0.1.0') + .command('rmdir [otherDirs...]') + .action(function (dir, otherDirs) { + console.log('rmdir %s', dir); + if (otherDirs) { + otherDirs.forEach(function (oDir) { + console.log('rmdir %s', oDir); + }); + } + }); + +program.parse(process.argv); +``` + +The variadic argument is passed to the action handler as an array. (And this also applies to `program.args`.) + +### Action handler (sub)commands + +You can add options to a command that uses an action handler. +The action handler gets passed a parameter for each argument you declared, and one additional argument which is the +command object itself. This command argument has the values for the command-specific options added as properties. + +```js +const program = require('commander'); + +program + .command('rm ') + .option('-r, --recursive', 'Remove recursively') + .action(function (dir, cmdObj) { + console.log('remove ' + dir + (cmdObj.recursive ? ' recursively' : '')) + }) + +program.parse(process.argv) +``` + +You may supply an `async` action handler, in which case you call `.parseAsync` rather than `.parse`. + +```js +async function run() { /* code goes here */ } + +async function main() { + program + .command('run') + .action(run); + await program.parseAsync(process.argv); +} +``` + +A command's options on the command line are validated when the command is used. Any unknown options will be reported as an error. However, if an action-based command does not define an action, then the options are not validated. + +Configuration options can be passed with the call to `.command()`. Specifying `true` for `opts.noHelp` will remove the command from the generated help output. + +### Git-style executable (sub)commands + +When `.command()` is invoked with a description argument, this tells commander that you're going to use separate executables for sub-commands, much like `git(1)` and other popular tools. +Commander will search the executables in the directory of the entry script (like `./examples/pm`) with the name `program-subcommand`, like `pm-install`, `pm-search`. +You can specify a custom name with the `executableFile` configuration option. + +You handle the options for an executable (sub)command in the executable, and don't declare them at the top-level. + +```js +// file: ./examples/pm +const program = require('commander'); + +program + .version('0.1.0') + .command('install [name]', 'install one or more packages') + .command('search [query]', 'search with optional query') + .command('update', 'update installed packages', {executableFile: 'myUpdateSubCommand'}) + .command('list', 'list packages installed', {isDefault: true}) + .parse(process.argv); +``` + +Configuration options can be passed with the call to `.command()`. Specifying `true` for `opts.noHelp` will remove the command from the generated help output. Specifying `true` for `opts.isDefault` will run the subcommand if no other subcommand is specified. +Specifying a name with `executableFile` will override the default constructed name. + +If the program is designed to be installed globally, make sure the executables have proper modes, like `755`. + +## Automated --help + + The help information is auto-generated based on the information commander already knows about your program, so the following `--help` info is for free: + +```bash +$ ./examples/pizza --help +Usage: pizza [options] + +An application for pizzas ordering + +Options: + -V, --version output the version number + -p, --peppers Add peppers + -P, --pineapple Add pineapple + -b, --bbq Add bbq sauce + -c, --cheese Add the specified type of cheese (default: "marble") + -C, --no-cheese You do not want any cheese + -h, --help output usage information +``` + +### Custom help + + You can display arbitrary `-h, --help` information + by listening for "--help". Commander will automatically + exit once you are done so that the remainder of your program + does not execute causing undesired behaviors, for example + in the following executable "stuff" will not output when + `--help` is used. + +```js +#!/usr/bin/env node + +const program = require('commander'); + +program + .version('0.1.0') + .option('-f, --foo', 'enable some foo') + .option('-b, --bar', 'enable some bar') + .option('-B, --baz', 'enable some baz'); + +// must be before .parse() since +// node's emit() is immediate + +program.on('--help', function(){ + console.log('') + console.log('Examples:'); + console.log(' $ custom-help --help'); + console.log(' $ custom-help -h'); +}); + +program.parse(process.argv); + +console.log('stuff'); +``` + +Yields the following help output when `node script-name.js -h` or `node script-name.js --help` are run: + +```Text +Usage: custom-help [options] + +Options: + -h, --help output usage information + -V, --version output the version number + -f, --foo enable some foo + -b, --bar enable some bar + -B, --baz enable some baz + +Examples: + $ custom-help --help + $ custom-help -h +``` + +### .usage and .name + +These allow you to customise the usage description in the first line of the help. The name is otherwise +deduced from the (full) program arguments. Given: + +```js +program + .name("my-command") + .usage("[global options] command") +``` + +The help will start with: + +```Text +Usage: my-command [global options] command +``` + +### .outputHelp(cb) + +Output help information without exiting. +Optional callback cb allows post-processing of help text before it is displayed. + +If you want to display help by default (e.g. if no command was provided), you can use something like: + +```js +const program = require('commander'); +const colors = require('colors'); + +program + .version('0.1.0') + .command('getstream [url]', 'get stream URL') + .parse(process.argv); + +if (!process.argv.slice(2).length) { + program.outputHelp(make_red); +} + +function make_red(txt) { + return colors.red(txt); //display the help text in red on the console +} +``` + +### .helpOption(flags, description) + + Override the default help flags and description. + +```js +program + .helpOption('-e, --HELP', 'read more information'); +``` + +### .help(cb) + + Output help information and exit immediately. + Optional callback cb allows post-processing of help text before it is displayed. + +## Custom event listeners + + You can execute custom actions by listening to command and option events. + +```js +program.on('option:verbose', function () { + process.env.VERBOSE = this.verbose; +}); + +// error on unknown commands +program.on('command:*', function () { + console.error('Invalid command: %s\nSee --help for a list of available commands.', program.args.join(' ')); + process.exit(1); +}); +``` + +## Bits and pieces + +### Avoiding option name clashes + +The original and default behaviour is that the option values are stored +as properties on the program, and the action handler is passed a +command object with the options values stored as properties. +This is very convenient to code, but the downside is possible clashes with +existing properties of Command. + +There are two new routines to change the behaviour, and the default behaviour may change in the future: + +- `storeOptionsAsProperties`: whether to store option values as properties on command object, or store separately (specify false) and access using `.opts()` +- `passCommandToAction`: whether to pass command to action handler, +or just the options (specify false) + +```js +// file: ./examples/storeOptionsAsProperties.action.js +program + .storeOptionsAsProperties(false) + .passCommandToAction(false); + +program + .name('my-program-name') + .option('-n,--name '); + +program + .command('show') + .option('-a,--action ') + .action((options) => { + console.log(options.action); + }); + +program.parse(process.argv); + +const programOptions = program.opts(); +console.log(programOptions.name); +``` + +### TypeScript + +The Commander package includes its TypeScript Definition file, but also requires the node types which you need to install yourself. e.g. + +```bash +npm install commander +npm install --save-dev @types/node +``` + +If you use `ts-node` and git-style sub-commands written as `.ts` files, you need to call your program through node to get the sub-commands called correctly. e.g. + +```bash +node -r ts-node/register pm.ts +``` + +### Node options such as `--harmony` + +You can enable `--harmony` option in two ways: + +- Use `#! /usr/bin/env node --harmony` in the sub-commands scripts. (Note Windows does not support this pattern.) +- Use the `--harmony` option when call the command, like `node --harmony examples/pm publish`. The `--harmony` option will be preserved when spawning sub-command process. + +### Node debugging + +If you are using the node inspector for [debugging](https://nodejs.org/en/docs/guides/debugging-getting-started/) git-style executable (sub)commands using `node --inspect` et al, +the inspector port is incremented by 1 for the spawned subcommand. + +### Override exit handling + +By default Commander calls `process.exit` when it detects errors, or after displaying the help or version. You can override +this behaviour and optionally supply a callback. The default override throws a `CommanderError`. + +The override callback is passed a `CommanderError` with properties `exitCode` number, `code` string, and `message`. The default override behaviour is to throw the error, except for async handling of executable subcommand completion which carries on. The normal display of error messages or version or help +is not affected by the override which is called after the display. + +``` js +program.exitOverride(); + +try { + program.parse(process.argv); +} catch (err) { + // custom processing... +} +``` + +## Examples + +```js +const program = require('commander'); + +program + .version('0.1.0') + .option('-C, --chdir ', 'change the working directory') + .option('-c, --config ', 'set config path. defaults to ./deploy.conf') + .option('-T, --no-tests', 'ignore test hook'); + +program + .command('setup [env]') + .description('run setup commands for all envs') + .option("-s, --setup_mode [mode]", "Which setup mode to use") + .action(function(env, options){ + const mode = options.setup_mode || "normal"; + env = env || 'all'; + console.log('setup for %s env(s) with %s mode', env, mode); + }); + +program + .command('exec ') + .alias('ex') + .description('execute the given remote cmd') + .option("-e, --exec_mode ", "Which exec mode to use") + .action(function(cmd, options){ + console.log('exec "%s" using %s mode', cmd, options.exec_mode); + }).on('--help', function() { + console.log(''); + console.log('Examples:'); + console.log(''); + console.log(' $ deploy exec sequential'); + console.log(' $ deploy exec async'); + }); + +program + .command('*') + .action(function(env){ + console.log('deploying "%s"', env); + }); + +program.parse(process.argv); +``` + +More Demos can be found in the [examples](https://github.com/tj/commander.js/tree/master/examples) directory. + +## License + +[MIT](https://github.com/tj/commander.js/blob/master/LICENSE) + +## Support + +Commander 4.x is supported on Node 8 and above, and is likely to work with Node 6 but not tested. +(For versions of Node below Node 6, use Commander 3.x or 2.x.) + +The main forum for free and community support is the project [Issues](https://github.com/tj/commander.js/issues) on GitHub. + +### Commander for enterprise + +Available as part of the Tidelift Subscription + +The maintainers of Commander and thousands of other packages are working with Tidelift to deliver commercial support and maintenance for the open source dependencies you use to build your applications. Save time, reduce risk, and improve code health, while paying the maintainers of the exact dependencies you use. [Learn more.](https://tidelift.com/subscription/pkg/npm-commander?utm_source=npm-commander&utm_medium=referral&utm_campaign=enterprise&utm_term=repo) Index: frontend/node_modules/sucrase/node_modules/commander/index.js =================================================================== --- frontend/node_modules/sucrase/node_modules/commander/index.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/node_modules/commander/index.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,1649 @@ +/** + * Module dependencies. + */ + +var EventEmitter = require('events').EventEmitter; +var spawn = require('child_process').spawn; +var path = require('path'); +var dirname = path.dirname; +var basename = path.basename; +var fs = require('fs'); + +/** + * Inherit `Command` from `EventEmitter.prototype`. + */ + +require('util').inherits(Command, EventEmitter); + +/** + * Expose the root command. + */ + +exports = module.exports = new Command(); + +/** + * Expose `Command`. + */ + +exports.Command = Command; + +/** + * Expose `Option`. + */ + +exports.Option = Option; + +/** + * Initialize a new `Option` with the given `flags` and `description`. + * + * @param {String} flags + * @param {String} description + * @api public + */ + +function Option(flags, description) { + this.flags = flags; + this.required = flags.indexOf('<') >= 0; // A value must be supplied when the option is specified. + this.optional = flags.indexOf('[') >= 0; // A value is optional when the option is specified. + this.mandatory = false; // The option must have a value after parsing, which usually means it must be specified on command line. + this.negate = flags.indexOf('-no-') !== -1; + flags = flags.split(/[ ,|]+/); + if (flags.length > 1 && !/^[[<]/.test(flags[1])) this.short = flags.shift(); + this.long = flags.shift(); + this.description = description || ''; +} + +/** + * Return option name. + * + * @return {String} + * @api private + */ + +Option.prototype.name = function() { + return this.long.replace(/^--/, ''); +}; + +/** + * Return option name, in a camelcase format that can be used + * as a object attribute key. + * + * @return {String} + * @api private + */ + +Option.prototype.attributeName = function() { + return camelcase(this.name().replace(/^no-/, '')); +}; + +/** + * Check if `arg` matches the short or long flag. + * + * @param {String} arg + * @return {Boolean} + * @api private + */ + +Option.prototype.is = function(arg) { + return this.short === arg || this.long === arg; +}; + +/** + * CommanderError class + * @class + */ +class CommanderError extends Error { + /** + * Constructs the CommanderError class + * @param {Number} exitCode suggested exit code which could be used with process.exit + * @param {String} code an id string representing the error + * @param {String} message human-readable description of the error + * @constructor + */ + constructor(exitCode, code, message) { + super(message); + // properly capture stack trace in Node.js + Error.captureStackTrace(this, this.constructor); + this.name = this.constructor.name; + this.code = code; + this.exitCode = exitCode; + } +} + +exports.CommanderError = CommanderError; + +/** + * Initialize a new `Command`. + * + * @param {String} [name] + * @api public + */ + +function Command(name) { + this.commands = []; + this.options = []; + this._execs = new Set(); + this._allowUnknownOption = false; + this._args = []; + this._name = name || ''; + this._optionValues = {}; + this._storeOptionsAsProperties = true; // backwards compatible by default + this._passCommandToAction = true; // backwards compatible by default + this._actionResults = []; + + this._helpFlags = '-h, --help'; + this._helpDescription = 'output usage information'; + this._helpShortFlag = '-h'; + this._helpLongFlag = '--help'; +} + +/** + * Define a command. + * + * There are two styles of command: pay attention to where to put the description. + * + * Examples: + * + * // Command implemented using action handler (description is supplied separately to `.command`) + * program + * .command('clone [destination]') + * .description('clone a repository into a newly created directory') + * .action((source, destination) => { + * console.log('clone command called'); + * }); + * + * // Command implemented using separate executable file (description is second parameter to `.command`) + * program + * .command('start ', 'start named service') + * .command('stop [service]', 'stop named service, or all if no name supplied'); + * + * @param {string} nameAndArgs - command name and arguments, args are `` or `[optional]` and last may also be `variadic...` + * @param {Object|string} [actionOptsOrExecDesc] - configuration options (for action), or description (for executable) + * @param {Object} [execOpts] - configuration options (for executable) + * @return {Command} returns new command for action handler, or top-level command for executable command + * @api public + */ + +Command.prototype.command = function(nameAndArgs, actionOptsOrExecDesc, execOpts) { + var desc = actionOptsOrExecDesc; + var opts = execOpts; + if (typeof desc === 'object' && desc !== null) { + opts = desc; + desc = null; + } + opts = opts || {}; + var args = nameAndArgs.split(/ +/); + var cmd = new Command(args.shift()); + + if (desc) { + cmd.description(desc); + this.executables = true; + this._execs.add(cmd._name); + if (opts.isDefault) this.defaultExecutable = cmd._name; + } + cmd._noHelp = !!opts.noHelp; + cmd._helpFlags = this._helpFlags; + cmd._helpDescription = this._helpDescription; + cmd._helpShortFlag = this._helpShortFlag; + cmd._helpLongFlag = this._helpLongFlag; + cmd._exitCallback = this._exitCallback; + cmd._storeOptionsAsProperties = this._storeOptionsAsProperties; + cmd._passCommandToAction = this._passCommandToAction; + + cmd._executableFile = opts.executableFile; // Custom name for executable file + this.commands.push(cmd); + cmd.parseExpectedArgs(args); + cmd.parent = this; + + if (desc) return this; + return cmd; +}; + +/** + * Define argument syntax for the top-level command. + * + * @api public + */ + +Command.prototype.arguments = function(desc) { + return this.parseExpectedArgs(desc.split(/ +/)); +}; + +/** + * Add an implicit `help [cmd]` subcommand + * which invokes `--help` for the given command. + * + * @api private + */ + +Command.prototype.addImplicitHelpCommand = function() { + this.command('help [cmd]', 'display help for [cmd]'); +}; + +/** + * Parse expected `args`. + * + * For example `["[type]"]` becomes `[{ required: false, name: 'type' }]`. + * + * @param {Array} args + * @return {Command} for chaining + * @api public + */ + +Command.prototype.parseExpectedArgs = function(args) { + if (!args.length) return; + var self = this; + args.forEach(function(arg) { + var argDetails = { + required: false, + name: '', + variadic: false + }; + + switch (arg[0]) { + case '<': + argDetails.required = true; + argDetails.name = arg.slice(1, -1); + break; + case '[': + argDetails.name = arg.slice(1, -1); + break; + } + + if (argDetails.name.length > 3 && argDetails.name.slice(-3) === '...') { + argDetails.variadic = true; + argDetails.name = argDetails.name.slice(0, -3); + } + if (argDetails.name) { + self._args.push(argDetails); + } + }); + return this; +}; + +/** + * Register callback to use as replacement for calling process.exit. + * + * @param {Function} [fn] optional callback which will be passed a CommanderError, defaults to throwing + * @return {Command} for chaining + * @api public + */ + +Command.prototype.exitOverride = function(fn) { + if (fn) { + this._exitCallback = fn; + } else { + this._exitCallback = function(err) { + if (err.code !== 'commander.executeSubCommandAsync') { + throw err; + } else { + // Async callback from spawn events, not useful to throw. + } + }; + } + return this; +}; + +/** + * Call process.exit, and _exitCallback if defined. + * + * @param {Number} exitCode exit code for using with process.exit + * @param {String} code an id string representing the error + * @param {String} message human-readable description of the error + * @return never + * @api private + */ + +Command.prototype._exit = function(exitCode, code, message) { + if (this._exitCallback) { + this._exitCallback(new CommanderError(exitCode, code, message)); + // Expecting this line is not reached. + } + process.exit(exitCode); +}; + +/** + * Register callback `fn` for the command. + * + * Examples: + * + * program + * .command('help') + * .description('display verbose help') + * .action(function() { + * // output help here + * }); + * + * @param {Function} fn + * @return {Command} for chaining + * @api public + */ + +Command.prototype.action = function(fn) { + var self = this; + var listener = function(args, unknown) { + // Parse any so-far unknown options + args = args || []; + unknown = unknown || []; + + var parsed = self.parseOptions(unknown); + + // Output help if necessary + outputHelpIfRequested(self, parsed.unknown); + self._checkForMissingMandatoryOptions(); + + // If there are still any unknown options, then we simply + // die, unless someone asked for help, in which case we give it + // to them, and then we die. + if (parsed.unknown.length > 0) { + self.unknownOption(parsed.unknown[0]); + } + + // Leftover arguments need to be pushed back. Fixes issue #56 + if (parsed.args.length) args = parsed.args.concat(args); + + self._args.forEach(function(arg, i) { + if (arg.required && args[i] == null) { + self.missingArgument(arg.name); + } else if (arg.variadic) { + if (i !== self._args.length - 1) { + self.variadicArgNotLast(arg.name); + } + + args[i] = args.splice(i); + } + }); + + // The .action callback takes an extra parameter which is the command itself. + var expectedArgsCount = self._args.length; + var actionArgs = args.slice(0, expectedArgsCount); + if (self._passCommandToAction) { + actionArgs[expectedArgsCount] = self; + } else { + actionArgs[expectedArgsCount] = self.opts(); + } + // Add the extra arguments so available too. + if (args.length > expectedArgsCount) { + actionArgs.push(args.slice(expectedArgsCount)); + } + + const actionResult = fn.apply(self, actionArgs); + // Remember result in case it is async. Assume parseAsync getting called on root. + let rootCommand = self; + while (rootCommand.parent) { + rootCommand = rootCommand.parent; + } + rootCommand._actionResults.push(actionResult); + }; + var parent = this.parent || this; + var name = parent === this ? '*' : this._name; + parent.on('command:' + name, listener); + if (this._alias) parent.on('command:' + this._alias, listener); + return this; +}; + +/** + * Internal implementation shared by .option() and .requiredOption() + * + * @param {Object} config + * @param {String} flags + * @param {String} description + * @param {Function|*} [fn] - custom option processing function or default vaue + * @param {*} [defaultValue] + * @return {Command} for chaining + * @api private + */ + +Command.prototype._optionEx = function(config, flags, description, fn, defaultValue) { + var self = this, + option = new Option(flags, description), + oname = option.name(), + name = option.attributeName(); + option.mandatory = !!config.mandatory; + + // default as 3rd arg + if (typeof fn !== 'function') { + if (fn instanceof RegExp) { + // This is a bit simplistic (especially no error messages), and probably better handled by caller using custom option processing. + // No longer documented in README, but still present for backwards compatibility. + var regex = fn; + fn = function(val, def) { + var m = regex.exec(val); + return m ? m[0] : def; + }; + } else { + defaultValue = fn; + fn = null; + } + } + + // preassign default value for --no-*, [optional], , or plain flag if boolean value + if (option.negate || option.optional || option.required || typeof defaultValue === 'boolean') { + // when --no-foo we make sure default is true, unless a --foo option is already defined + if (option.negate) { + const positiveLongFlag = option.long.replace(/^--no-/, '--'); + defaultValue = self.optionFor(positiveLongFlag) ? self._getOptionValue(name) : true; + } + // preassign only if we have a default + if (defaultValue !== undefined) { + self._setOptionValue(name, defaultValue); + option.defaultValue = defaultValue; + } + } + + // register the option + this.options.push(option); + + // when it's passed assign the value + // and conditionally invoke the callback + this.on('option:' + oname, function(val) { + // coercion + if (val !== null && fn) { + val = fn(val, self._getOptionValue(name) === undefined ? defaultValue : self._getOptionValue(name)); + } + + // unassigned or boolean value + if (typeof self._getOptionValue(name) === 'boolean' || typeof self._getOptionValue(name) === 'undefined') { + // if no value, negate false, and we have a default, then use it! + if (val == null) { + self._setOptionValue(name, option.negate + ? false + : defaultValue || true); + } else { + self._setOptionValue(name, val); + } + } else if (val !== null) { + // reassign + self._setOptionValue(name, option.negate ? false : val); + } + }); + + return this; +}; + +/** + * Define option with `flags`, `description` and optional + * coercion `fn`. + * + * The `flags` string should contain both the short and long flags, + * separated by comma, a pipe or space. The following are all valid + * all will output this way when `--help` is used. + * + * "-p, --pepper" + * "-p|--pepper" + * "-p --pepper" + * + * Examples: + * + * // simple boolean defaulting to undefined + * program.option('-p, --pepper', 'add pepper'); + * + * program.pepper + * // => undefined + * + * --pepper + * program.pepper + * // => true + * + * // simple boolean defaulting to true (unless non-negated option is also defined) + * program.option('-C, --no-cheese', 'remove cheese'); + * + * program.cheese + * // => true + * + * --no-cheese + * program.cheese + * // => false + * + * // required argument + * program.option('-C, --chdir ', 'change the working directory'); + * + * --chdir /tmp + * program.chdir + * // => "/tmp" + * + * // optional argument + * program.option('-c, --cheese [type]', 'add cheese [marble]'); + * + * @param {String} flags + * @param {String} description + * @param {Function|*} [fn] - custom option processing function or default vaue + * @param {*} [defaultValue] + * @return {Command} for chaining + * @api public + */ + +Command.prototype.option = function(flags, description, fn, defaultValue) { + return this._optionEx({}, flags, description, fn, defaultValue); +}; + +/* + * Add a required option which must have a value after parsing. This usually means + * the option must be specified on the command line. (Otherwise the same as .option().) + * + * The `flags` string should contain both the short and long flags, separated by comma, a pipe or space. + * + * @param {String} flags + * @param {String} description + * @param {Function|*} [fn] - custom option processing function or default vaue + * @param {*} [defaultValue] + * @return {Command} for chaining + * @api public + */ + +Command.prototype.requiredOption = function(flags, description, fn, defaultValue) { + return this._optionEx({ mandatory: true }, flags, description, fn, defaultValue); +}; + +/** + * Allow unknown options on the command line. + * + * @param {Boolean} arg if `true` or omitted, no error will be thrown + * for unknown options. + * @api public + */ +Command.prototype.allowUnknownOption = function(arg) { + this._allowUnknownOption = arguments.length === 0 || arg; + return this; +}; + +/** + * Whether to store option values as properties on command object, + * or store separately (specify false). In both cases the option values can be accessed using .opts(). + * + * @param {boolean} value + * @return {Command} Command for chaining + * @api public + */ + +Command.prototype.storeOptionsAsProperties = function(value) { + this._storeOptionsAsProperties = (value === undefined) || value; + if (this.options.length) { + // This is for programmer, not end user. + console.error('Commander usage error: call storeOptionsAsProperties before adding options'); + } + return this; +}; + +/** + * Whether to pass command to action handler, + * or just the options (specify false). + * + * @param {boolean} value + * @return {Command} Command for chaining + * @api public + */ + +Command.prototype.passCommandToAction = function(value) { + this._passCommandToAction = (value === undefined) || value; + return this; +}; + +/** + * Store option value + * + * @param {String} key + * @param {Object} value + * @api private + */ + +Command.prototype._setOptionValue = function(key, value) { + if (this._storeOptionsAsProperties) { + this[key] = value; + } else { + this._optionValues[key] = value; + } +}; + +/** + * Retrieve option value + * + * @param {String} key + * @return {Object} value + * @api private + */ + +Command.prototype._getOptionValue = function(key) { + if (this._storeOptionsAsProperties) { + return this[key]; + } + return this._optionValues[key]; +}; + +/** + * Parse `argv`, setting options and invoking commands when defined. + * + * @param {Array} argv + * @return {Command} for chaining + * @api public + */ + +Command.prototype.parse = function(argv) { + // implicit help + if (this.executables) this.addImplicitHelpCommand(); + + // store raw args + this.rawArgs = argv; + + // guess name + this._name = this._name || basename(argv[1], '.js'); + + // github-style sub-commands with no sub-command + if (this.executables && argv.length < 3 && !this.defaultExecutable) { + // this user needs help + argv.push(this._helpLongFlag); + } + + // process argv + var normalized = this.normalize(argv.slice(2)); + var parsed = this.parseOptions(normalized); + var args = this.args = parsed.args; + + var result = this.parseArgs(this.args, parsed.unknown); + + if (args[0] === 'help' && args.length === 1) this.help(); + + // Note for future: we could return early if we found an action handler in parseArgs, as none of following code needed? + + // --help + if (args[0] === 'help') { + args[0] = args[1]; + args[1] = this._helpLongFlag; + } else { + // If calling through to executable subcommand we could check for help flags before failing, + // but a somewhat unlikely case since program options not passed to executable subcommands. + // Wait for reports to see if check needed and what usage pattern is. + this._checkForMissingMandatoryOptions(); + } + + // executable sub-commands + // (Debugging note for future: args[0] is not right if an action has been called) + var name = result.args[0]; + var subCommand = null; + + // Look for subcommand + if (name) { + subCommand = this.commands.find(function(command) { + return command._name === name; + }); + } + + // Look for alias + if (!subCommand && name) { + subCommand = this.commands.find(function(command) { + return command.alias() === name; + }); + if (subCommand) { + name = subCommand._name; + args[0] = name; + } + } + + // Look for default subcommand + if (!subCommand && this.defaultExecutable) { + name = this.defaultExecutable; + args.unshift(name); + subCommand = this.commands.find(function(command) { + return command._name === name; + }); + } + + if (this._execs.has(name)) { + return this.executeSubCommand(argv, args, parsed.unknown, subCommand ? subCommand._executableFile : undefined); + } + + return result; +}; + +/** + * Parse `argv`, setting options and invoking commands when defined. + * + * Use parseAsync instead of parse if any of your action handlers are async. Returns a Promise. + * + * @param {Array} argv + * @return {Promise} + * @api public + */ +Command.prototype.parseAsync = function(argv) { + this.parse(argv); + return Promise.all(this._actionResults); +}; + +/** + * Execute a sub-command executable. + * + * @param {Array} argv + * @param {Array} args + * @param {Array} unknown + * @param {String} executableFile + * @api private + */ + +Command.prototype.executeSubCommand = function(argv, args, unknown, executableFile) { + args = args.concat(unknown); + + if (!args.length) this.help(); + + var isExplicitJS = false; // Whether to use node to launch "executable" + + // executable + var pm = argv[1]; + // name of the subcommand, like `pm-install` + var bin = basename(pm, path.extname(pm)) + '-' + args[0]; + if (executableFile != null) { + bin = executableFile; + // Check for same extensions as we scan for below so get consistent launch behaviour. + var executableExt = path.extname(executableFile); + isExplicitJS = executableExt === '.js' || executableExt === '.ts' || executableExt === '.mjs'; + } + + // In case of globally installed, get the base dir where executable + // subcommand file should be located at + var baseDir; + + var resolvedLink = fs.realpathSync(pm); + + baseDir = dirname(resolvedLink); + + // prefer local `./` to bin in the $PATH + var localBin = path.join(baseDir, bin); + + // whether bin file is a js script with explicit `.js` or `.ts` extension + if (exists(localBin + '.js')) { + bin = localBin + '.js'; + isExplicitJS = true; + } else if (exists(localBin + '.ts')) { + bin = localBin + '.ts'; + isExplicitJS = true; + } else if (exists(localBin + '.mjs')) { + bin = localBin + '.mjs'; + isExplicitJS = true; + } else if (exists(localBin)) { + bin = localBin; + } + + args = args.slice(1); + + var proc; + if (process.platform !== 'win32') { + if (isExplicitJS) { + args.unshift(bin); + // add executable arguments to spawn + args = incrementNodeInspectorPort(process.execArgv).concat(args); + + proc = spawn(process.argv[0], args, { stdio: 'inherit' }); + } else { + proc = spawn(bin, args, { stdio: 'inherit' }); + } + } else { + args.unshift(bin); + // add executable arguments to spawn + args = incrementNodeInspectorPort(process.execArgv).concat(args); + proc = spawn(process.execPath, args, { stdio: 'inherit' }); + } + + var signals = ['SIGUSR1', 'SIGUSR2', 'SIGTERM', 'SIGINT', 'SIGHUP']; + signals.forEach(function(signal) { + process.on(signal, function() { + if (proc.killed === false && proc.exitCode === null) { + proc.kill(signal); + } + }); + }); + + // By default terminate process when spawned process terminates. + // Suppressing the exit if exitCallback defined is a bit messy and of limited use, but does allow process to stay running! + const exitCallback = this._exitCallback; + if (!exitCallback) { + proc.on('close', process.exit.bind(process)); + } else { + proc.on('close', () => { + exitCallback(new CommanderError(process.exitCode || 0, 'commander.executeSubCommandAsync', '(close)')); + }); + } + proc.on('error', function(err) { + if (err.code === 'ENOENT') { + console.error('error: %s(1) does not exist, try --help', bin); + } else if (err.code === 'EACCES') { + console.error('error: %s(1) not executable. try chmod or run with root', bin); + } + if (!exitCallback) { + process.exit(1); + } else { + const wrappedError = new CommanderError(1, 'commander.executeSubCommandAsync', '(error)'); + wrappedError.nestedError = err; + exitCallback(wrappedError); + } + }); + + // Store the reference to the child process + this.runningCommand = proc; +}; + +/** + * Normalize `args`, splitting joined short flags. For example + * the arg "-abc" is equivalent to "-a -b -c". + * This also normalizes equal sign and splits "--abc=def" into "--abc def". + * + * @param {Array} args + * @return {Array} + * @api private + */ + +Command.prototype.normalize = function(args) { + var ret = [], + arg, + lastOpt, + index, + short, + opt; + + for (var i = 0, len = args.length; i < len; ++i) { + arg = args[i]; + if (i > 0) { + lastOpt = this.optionFor(args[i - 1]); + } + + if (arg === '--') { + // Honor option terminator + ret = ret.concat(args.slice(i)); + break; + } else if (lastOpt && lastOpt.required) { + ret.push(arg); + } else if (arg.length > 2 && arg[0] === '-' && arg[1] !== '-') { + short = arg.slice(0, 2); + opt = this.optionFor(short); + if (opt && (opt.required || opt.optional)) { + ret.push(short); + ret.push(arg.slice(2)); + } else { + arg.slice(1).split('').forEach(function(c) { + ret.push('-' + c); + }); + } + } else if (/^--/.test(arg) && ~(index = arg.indexOf('='))) { + ret.push(arg.slice(0, index), arg.slice(index + 1)); + } else { + ret.push(arg); + } + } + + return ret; +}; + +/** + * Parse command `args`. + * + * When listener(s) are available those + * callbacks are invoked, otherwise the "*" + * event is emitted and those actions are invoked. + * + * @param {Array} args + * @return {Command} for chaining + * @api private + */ + +Command.prototype.parseArgs = function(args, unknown) { + var name; + + if (args.length) { + name = args[0]; + if (this.listeners('command:' + name).length) { + this.emit('command:' + args.shift(), args, unknown); + } else { + this.emit('command:*', args, unknown); + } + } else { + outputHelpIfRequested(this, unknown); + + // If there were no args and we have unknown options, + // then they are extraneous and we need to error. + if (unknown.length > 0 && !this.defaultExecutable) { + this.unknownOption(unknown[0]); + } + if (this.commands.length === 0 && + this._args.filter(function(a) { return a.required; }).length === 0) { + this.emit('command:*'); + } + } + + return this; +}; + +/** + * Return an option matching `arg` if any. + * + * @param {String} arg + * @return {Option} + * @api private + */ + +Command.prototype.optionFor = function(arg) { + for (var i = 0, len = this.options.length; i < len; ++i) { + if (this.options[i].is(arg)) { + return this.options[i]; + } + } +}; + +/** + * Display an error message if a mandatory option does not have a value. + * + * @api private + */ + +Command.prototype._checkForMissingMandatoryOptions = function() { + // Walk up hierarchy so can call from action handler after checking for displaying help. + for (var cmd = this; cmd; cmd = cmd.parent) { + cmd.options.forEach((anOption) => { + if (anOption.mandatory && (cmd._getOptionValue(anOption.attributeName()) === undefined)) { + cmd.missingMandatoryOptionValue(anOption); + } + }); + } +}; + +/** + * Parse options from `argv` returning `argv` + * void of these options. + * + * @param {Array} argv + * @return {{args: Array, unknown: Array}} + * @api public + */ + +Command.prototype.parseOptions = function(argv) { + var args = [], + len = argv.length, + literal, + option, + arg; + + var unknownOptions = []; + + // parse options + for (var i = 0; i < len; ++i) { + arg = argv[i]; + + // literal args after -- + if (literal) { + args.push(arg); + continue; + } + + if (arg === '--') { + literal = true; + continue; + } + + // find matching Option + option = this.optionFor(arg); + + // option is defined + if (option) { + // requires arg + if (option.required) { + arg = argv[++i]; + if (arg == null) return this.optionMissingArgument(option); + this.emit('option:' + option.name(), arg); + // optional arg + } else if (option.optional) { + arg = argv[i + 1]; + if (arg == null || (arg[0] === '-' && arg !== '-')) { + arg = null; + } else { + ++i; + } + this.emit('option:' + option.name(), arg); + // flag + } else { + this.emit('option:' + option.name()); + } + continue; + } + + // looks like an option + if (arg.length > 1 && arg[0] === '-') { + unknownOptions.push(arg); + + // If the next argument looks like it might be + // an argument for this option, we pass it on. + // If it isn't, then it'll simply be ignored + if ((i + 1) < argv.length && (argv[i + 1][0] !== '-' || argv[i + 1] === '-')) { + unknownOptions.push(argv[++i]); + } + continue; + } + + // arg + args.push(arg); + } + + return { args: args, unknown: unknownOptions }; +}; + +/** + * Return an object containing options as key-value pairs + * + * @return {Object} + * @api public + */ +Command.prototype.opts = function() { + if (this._storeOptionsAsProperties) { + // Preserve original behaviour so backwards compatible when still using properties + var result = {}, + len = this.options.length; + + for (var i = 0; i < len; i++) { + var key = this.options[i].attributeName(); + result[key] = key === this._versionOptionName ? this._version : this[key]; + } + return result; + } + + return this._optionValues; +}; + +/** + * Argument `name` is missing. + * + * @param {String} name + * @api private + */ + +Command.prototype.missingArgument = function(name) { + const message = `error: missing required argument '${name}'`; + console.error(message); + this._exit(1, 'commander.missingArgument', message); +}; + +/** + * `Option` is missing an argument, but received `flag` or nothing. + * + * @param {Option} option + * @param {String} [flag] + * @api private + */ + +Command.prototype.optionMissingArgument = function(option, flag) { + let message; + if (flag) { + message = `error: option '${option.flags}' argument missing, got '${flag}'`; + } else { + message = `error: option '${option.flags}' argument missing`; + } + console.error(message); + this._exit(1, 'commander.optionMissingArgument', message); +}; + +/** + * `Option` does not have a value, and is a mandatory option. + * + * @param {Option} option + * @api private + */ + +Command.prototype.missingMandatoryOptionValue = function(option) { + const message = `error: required option '${option.flags}' not specified`; + console.error(message); + this._exit(1, 'commander.missingMandatoryOptionValue', message); +}; + +/** + * Unknown option `flag`. + * + * @param {String} flag + * @api private + */ + +Command.prototype.unknownOption = function(flag) { + if (this._allowUnknownOption) return; + const message = `error: unknown option '${flag}'`; + console.error(message); + this._exit(1, 'commander.unknownOption', message); +}; + +/** + * Variadic argument with `name` is not the last argument as required. + * + * @param {String} name + * @api private + */ + +Command.prototype.variadicArgNotLast = function(name) { + const message = `error: variadic arguments must be last '${name}'`; + console.error(message); + this._exit(1, 'commander.variadicArgNotLast', message); +}; + +/** + * Set the program version to `str`. + * + * This method auto-registers the "-V, --version" flag + * which will print the version number when passed. + * + * You can optionally supply the flags and description to override the defaults. + * + * @param {String} str + * @param {String} [flags] + * @param {String} [description] + * @return {Command} for chaining + * @api public + */ + +Command.prototype.version = function(str, flags, description) { + if (arguments.length === 0) return this._version; + this._version = str; + flags = flags || '-V, --version'; + description = description || 'output the version number'; + var versionOption = new Option(flags, description); + this._versionOptionName = versionOption.long.substr(2) || 'version'; + this.options.push(versionOption); + var self = this; + this.on('option:' + this._versionOptionName, function() { + process.stdout.write(str + '\n'); + self._exit(0, 'commander.version', str); + }); + return this; +}; + +/** + * Set the description to `str`. + * + * @param {String} str + * @param {Object} [argsDescription] + * @return {String|Command} + * @api public + */ + +Command.prototype.description = function(str, argsDescription) { + if (arguments.length === 0) return this._description; + this._description = str; + this._argsDescription = argsDescription; + return this; +}; + +/** + * Set an alias for the command + * + * @param {String} alias + * @return {String|Command} + * @api public + */ + +Command.prototype.alias = function(alias) { + var command = this; + if (this.commands.length !== 0) { + command = this.commands[this.commands.length - 1]; + } + + if (arguments.length === 0) return command._alias; + + if (alias === command._name) throw new Error('Command alias can\'t be the same as its name'); + + command._alias = alias; + return this; +}; + +/** + * Set / get the command usage `str`. + * + * @param {String} [str] + * @return {String|Command} + * @api public + */ + +Command.prototype.usage = function(str) { + var args = this._args.map(function(arg) { + return humanReadableArgName(arg); + }); + + var usage = '[options]' + + (this.commands.length ? ' [command]' : '') + + (this._args.length ? ' ' + args.join(' ') : ''); + + if (arguments.length === 0) return this._usage || usage; + this._usage = str; + + return this; +}; + +/** + * Get or set the name of the command + * + * @param {String} [str] + * @return {String|Command} + * @api public + */ + +Command.prototype.name = function(str) { + if (arguments.length === 0) return this._name; + this._name = str; + return this; +}; + +/** + * Return prepared commands. + * + * @return {Array} + * @api private + */ + +Command.prototype.prepareCommands = function() { + return this.commands.filter(function(cmd) { + return !cmd._noHelp; + }).map(function(cmd) { + var args = cmd._args.map(function(arg) { + return humanReadableArgName(arg); + }).join(' '); + + return [ + cmd._name + + (cmd._alias ? '|' + cmd._alias : '') + + (cmd.options.length ? ' [options]' : '') + + (args ? ' ' + args : ''), + cmd._description + ]; + }); +}; + +/** + * Return the largest command length. + * + * @return {Number} + * @api private + */ + +Command.prototype.largestCommandLength = function() { + var commands = this.prepareCommands(); + return commands.reduce(function(max, command) { + return Math.max(max, command[0].length); + }, 0); +}; + +/** + * Return the largest option length. + * + * @return {Number} + * @api private + */ + +Command.prototype.largestOptionLength = function() { + var options = [].slice.call(this.options); + options.push({ + flags: this._helpFlags + }); + + return options.reduce(function(max, option) { + return Math.max(max, option.flags.length); + }, 0); +}; + +/** + * Return the largest arg length. + * + * @return {Number} + * @api private + */ + +Command.prototype.largestArgLength = function() { + return this._args.reduce(function(max, arg) { + return Math.max(max, arg.name.length); + }, 0); +}; + +/** + * Return the pad width. + * + * @return {Number} + * @api private + */ + +Command.prototype.padWidth = function() { + var width = this.largestOptionLength(); + if (this._argsDescription && this._args.length) { + if (this.largestArgLength() > width) { + width = this.largestArgLength(); + } + } + + if (this.commands && this.commands.length) { + if (this.largestCommandLength() > width) { + width = this.largestCommandLength(); + } + } + + return width; +}; + +/** + * Return help for options. + * + * @return {String} + * @api private + */ + +Command.prototype.optionHelp = function() { + var width = this.padWidth(); + + var columns = process.stdout.columns || 80; + var descriptionWidth = columns - width - 4; + + // Append the help information + return this.options.map(function(option) { + const fullDesc = option.description + + ((!option.negate && option.defaultValue !== undefined) ? ' (default: ' + JSON.stringify(option.defaultValue) + ')' : ''); + return pad(option.flags, width) + ' ' + optionalWrap(fullDesc, descriptionWidth, width + 2); + }).concat([pad(this._helpFlags, width) + ' ' + optionalWrap(this._helpDescription, descriptionWidth, width + 2)]) + .join('\n'); +}; + +/** + * Return command help documentation. + * + * @return {String} + * @api private + */ + +Command.prototype.commandHelp = function() { + if (!this.commands.length) return ''; + + var commands = this.prepareCommands(); + var width = this.padWidth(); + + var columns = process.stdout.columns || 80; + var descriptionWidth = columns - width - 4; + + return [ + 'Commands:', + commands.map(function(cmd) { + var desc = cmd[1] ? ' ' + cmd[1] : ''; + return (desc ? pad(cmd[0], width) : cmd[0]) + optionalWrap(desc, descriptionWidth, width + 2); + }).join('\n').replace(/^/gm, ' '), + '' + ].join('\n'); +}; + +/** + * Return program help documentation. + * + * @return {String} + * @api private + */ + +Command.prototype.helpInformation = function() { + var desc = []; + if (this._description) { + desc = [ + this._description, + '' + ]; + + var argsDescription = this._argsDescription; + if (argsDescription && this._args.length) { + var width = this.padWidth(); + var columns = process.stdout.columns || 80; + var descriptionWidth = columns - width - 5; + desc.push('Arguments:'); + desc.push(''); + this._args.forEach(function(arg) { + desc.push(' ' + pad(arg.name, width) + ' ' + wrap(argsDescription[arg.name], descriptionWidth, width + 4)); + }); + desc.push(''); + } + } + + var cmdName = this._name; + if (this._alias) { + cmdName = cmdName + '|' + this._alias; + } + var parentCmdNames = ''; + for (var parentCmd = this.parent; parentCmd; parentCmd = parentCmd.parent) { + parentCmdNames = parentCmd.name() + ' ' + parentCmdNames; + } + var usage = [ + 'Usage: ' + parentCmdNames + cmdName + ' ' + this.usage(), + '' + ]; + + var cmds = []; + var commandHelp = this.commandHelp(); + if (commandHelp) cmds = [commandHelp]; + + var options = [ + 'Options:', + '' + this.optionHelp().replace(/^/gm, ' '), + '' + ]; + + return usage + .concat(desc) + .concat(options) + .concat(cmds) + .join('\n'); +}; + +/** + * Output help information for this command. + * + * When listener(s) are available for the helpLongFlag + * those callbacks are invoked. + * + * @api public + */ + +Command.prototype.outputHelp = function(cb) { + if (!cb) { + cb = function(passthru) { + return passthru; + }; + } + const cbOutput = cb(this.helpInformation()); + if (typeof cbOutput !== 'string' && !Buffer.isBuffer(cbOutput)) { + throw new Error('outputHelp callback must return a string or a Buffer'); + } + process.stdout.write(cbOutput); + this.emit(this._helpLongFlag); +}; + +/** + * You can pass in flags and a description to override the help + * flags and help description for your command. + * + * @param {String} [flags] + * @param {String} [description] + * @return {Command} + * @api public + */ + +Command.prototype.helpOption = function(flags, description) { + this._helpFlags = flags || this._helpFlags; + this._helpDescription = description || this._helpDescription; + + var splitFlags = this._helpFlags.split(/[ ,|]+/); + + if (splitFlags.length > 1) this._helpShortFlag = splitFlags.shift(); + + this._helpLongFlag = splitFlags.shift(); + + return this; +}; + +/** + * Output help information and exit. + * + * @param {Function} [cb] + * @api public + */ + +Command.prototype.help = function(cb) { + this.outputHelp(cb); + // exitCode: preserving original behaviour which was calling process.exit() + // message: do not have all displayed text available so only passing placeholder. + this._exit(process.exitCode || 0, 'commander.help', '(outputHelp)'); +}; + +/** + * Camel-case the given `flag` + * + * @param {String} flag + * @return {String} + * @api private + */ + +function camelcase(flag) { + return flag.split('-').reduce(function(str, word) { + return str + word[0].toUpperCase() + word.slice(1); + }); +} + +/** + * Pad `str` to `width`. + * + * @param {String} str + * @param {Number} width + * @return {String} + * @api private + */ + +function pad(str, width) { + var len = Math.max(0, width - str.length); + return str + Array(len + 1).join(' '); +} + +/** + * Wraps the given string with line breaks at the specified width while breaking + * words and indenting every but the first line on the left. + * + * @param {String} str + * @param {Number} width + * @param {Number} indent + * @return {String} + * @api private + */ +function wrap(str, width, indent) { + var regex = new RegExp('.{1,' + (width - 1) + '}([\\s\u200B]|$)|[^\\s\u200B]+?([\\s\u200B]|$)', 'g'); + var lines = str.match(regex) || []; + return lines.map(function(line, i) { + if (line.slice(-1) === '\n') { + line = line.slice(0, line.length - 1); + } + return ((i > 0 && indent) ? Array(indent + 1).join(' ') : '') + line.trimRight(); + }).join('\n'); +} + +/** + * Optionally wrap the given str to a max width of width characters per line + * while indenting with indent spaces. Do not wrap if insufficient width or + * string is manually formatted. + * + * @param {String} str + * @param {Number} width + * @param {Number} indent + * @return {String} + * @api private + */ +function optionalWrap(str, width, indent) { + // Detect manually wrapped and indented strings by searching for line breaks + // followed by multiple spaces/tabs. + if (str.match(/[\n]\s+/)) return str; + // Do not wrap to narrow columns (or can end up with a word per line). + const minWidth = 40; + if (width < minWidth) return str; + + return wrap(str, width, indent); +} + +/** + * Output help information if help flags specified + * + * @param {Command} cmd - command to output help for + * @param {Array} options - array of options to search for -h or --help + * @api private + */ + +function outputHelpIfRequested(cmd, options) { + options = options || []; + + for (var i = 0; i < options.length; i++) { + if (options[i] === cmd._helpLongFlag || options[i] === cmd._helpShortFlag) { + cmd.outputHelp(); + // (Do not have all displayed text available so only passing placeholder.) + cmd._exit(0, 'commander.helpDisplayed', '(outputHelp)'); + } + } +} + +/** + * Takes an argument and returns its human readable equivalent for help usage. + * + * @param {Object} arg + * @return {String} + * @api private + */ + +function humanReadableArgName(arg) { + var nameOutput = arg.name + (arg.variadic === true ? '...' : ''); + + return arg.required + ? '<' + nameOutput + '>' + : '[' + nameOutput + ']'; +} + +// for versions before node v0.8 when there weren't `fs.existsSync` +function exists(file) { + try { + if (fs.statSync(file).isFile()) { + return true; + } + } catch (e) { + return false; + } +} + +/** + * Scan arguments and increment port number for inspect calls (to avoid conflicts when spawning new command). + * + * @param {string[]} args - array of arguments from node.execArgv + * @returns {string[]} + * @api private + */ + +function incrementNodeInspectorPort(args) { + // Testing for these options: + // --inspect[=[host:]port] + // --inspect-brk[=[host:]port] + // --inspect-port=[host:]port + return args.map((arg) => { + var result = arg; + if (arg.indexOf('--inspect') === 0) { + var debugOption; + var debugHost = '127.0.0.1'; + var debugPort = '9229'; + var match; + if ((match = arg.match(/^(--inspect(-brk)?)$/)) !== null) { + // e.g. --inspect + debugOption = match[1]; + } else if ((match = arg.match(/^(--inspect(-brk|-port)?)=([^:]+)$/)) !== null) { + debugOption = match[1]; + if (/^\d+$/.test(match[3])) { + // e.g. --inspect=1234 + debugPort = match[3]; + } else { + // e.g. --inspect=localhost + debugHost = match[3]; + } + } else if ((match = arg.match(/^(--inspect(-brk|-port)?)=([^:]+):(\d+)$/)) !== null) { + // e.g. --inspect=localhost:1234 + debugOption = match[1]; + debugHost = match[3]; + debugPort = match[4]; + } + + if (debugOption && debugPort !== '0') { + result = `${debugOption}=${debugHost}:${parseInt(debugPort) + 1}`; + } + } + return result; + }); +} Index: frontend/node_modules/sucrase/node_modules/commander/package.json =================================================================== --- frontend/node_modules/sucrase/node_modules/commander/package.json (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/node_modules/commander/package.json (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,41 @@ +{ + "name": "commander", + "version": "4.1.1", + "description": "the complete solution for node.js command-line programs", + "keywords": [ + "commander", + "command", + "option", + "parser" + ], + "author": "TJ Holowaychuk ", + "license": "MIT", + "repository": { + "type": "git", + "url": "https://github.com/tj/commander.js.git" + }, + "scripts": { + "lint": "eslint index.js \"tests/**/*.js\"", + "test": "jest && npm run test-typings", + "test-typings": "tsc -p tsconfig.json" + }, + "main": "index", + "files": [ + "index.js", + "typings/index.d.ts" + ], + "dependencies": {}, + "devDependencies": { + "@types/jest": "^24.0.23", + "@types/node": "^12.12.11", + "eslint": "^6.7.0", + "eslint-plugin-jest": "^22.21.0", + "jest": "^24.8.0", + "standard": "^14.3.1", + "typescript": "^3.7.2" + }, + "typings": "typings/index.d.ts", + "engines": { + "node": ">= 6" + } +} Index: frontend/node_modules/sucrase/node_modules/commander/typings/index.d.ts =================================================================== --- frontend/node_modules/sucrase/node_modules/commander/typings/index.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/node_modules/commander/typings/index.d.ts (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,311 @@ +// Type definitions for commander +// Original definitions by: Alan Agius , Marcelo Dezem , vvakame , Jules Randolph + +/// + +declare namespace commander { + + interface CommanderError extends Error { + code: string; + exitCode: number; + message: string; + nestedError?: string; + } + type CommanderErrorConstructor = { new (exitCode: number, code: string, message: string): CommanderError }; + + interface Option { + flags: string; + required: boolean; // A value must be supplied when the option is specified. + optional: boolean; // A value is optional when the option is specified. + mandatory: boolean; // The option must have a value after parsing, which usually means it must be specified on command line. + bool: boolean; + short?: string; + long: string; + description: string; + } + type OptionConstructor = { new (flags: string, description?: string): Option }; + + interface Command extends NodeJS.EventEmitter { + [key: string]: any; // options as properties + + args: string[]; + + /** + * Set the program version to `str`. + * + * This method auto-registers the "-V, --version" flag + * which will print the version number when passed. + * + * You can optionally supply the flags and description to override the defaults. + */ + version(str: string, flags?: string, description?: string): Command; + + /** + * Define a command, implemented using an action handler. + * + * @remarks + * The command description is supplied using `.description`, not as a parameter to `.command`. + * + * @example + * ```ts + * program + * .command('clone [destination]') + * .description('clone a repository into a newly created directory') + * .action((source, destination) => { + * console.log('clone command called'); + * }); + * ``` + * + * @param nameAndArgs - command name and arguments, args are `` or `[optional]` and last may also be `variadic...` + * @param opts - configuration options + * @returns new command + */ + command(nameAndArgs: string, opts?: CommandOptions): Command; + /** + * Define a command, implemented in a separate executable file. + * + * @remarks + * The command description is supplied as the second parameter to `.command`. + * + * @example + * ```ts + * program + * .command('start ', 'start named service') + * .command('stop [service]', 'stop named serice, or all if no name supplied'); + * ``` + * + * @param nameAndArgs - command name and arguments, args are `` or `[optional]` and last may also be `variadic...` + * @param description - description of executable command + * @param opts - configuration options + * @returns top level command for chaining more command definitions + */ + command(nameAndArgs: string, description: string, opts?: commander.CommandOptions): Command; + + /** + * Define argument syntax for the top-level command. + * + * @returns Command for chaining + */ + arguments(desc: string): Command; + + /** + * Parse expected `args`. + * + * For example `["[type]"]` becomes `[{ required: false, name: 'type' }]`. + * + * @returns Command for chaining + */ + parseExpectedArgs(args: string[]): Command; + + /** + * Register callback to use as replacement for calling process.exit. + */ + exitOverride(callback?: (err: CommanderError) => never|void): Command; + + /** + * Register callback `fn` for the command. + * + * @example + * program + * .command('help') + * .description('display verbose help') + * .action(function() { + * // output help here + * }); + * + * @returns Command for chaining + */ + action(fn: (...args: any[]) => void | Promise): Command; + + /** + * Define option with `flags`, `description` and optional + * coercion `fn`. + * + * The `flags` string should contain both the short and long flags, + * separated by comma, a pipe or space. The following are all valid + * all will output this way when `--help` is used. + * + * "-p, --pepper" + * "-p|--pepper" + * "-p --pepper" + * + * @example + * // simple boolean defaulting to false + * program.option('-p, --pepper', 'add pepper'); + * + * --pepper + * program.pepper + * // => Boolean + * + * // simple boolean defaulting to true + * program.option('-C, --no-cheese', 'remove cheese'); + * + * program.cheese + * // => true + * + * --no-cheese + * program.cheese + * // => false + * + * // required argument + * program.option('-C, --chdir ', 'change the working directory'); + * + * --chdir /tmp + * program.chdir + * // => "/tmp" + * + * // optional argument + * program.option('-c, --cheese [type]', 'add cheese [marble]'); + * + * @returns Command for chaining + */ + option(flags: string, description?: string, fn?: ((arg1: any, arg2: any) => void) | RegExp, defaultValue?: any): Command; + option(flags: string, description?: string, defaultValue?: any): Command; + + /** + * Define a required option, which must have a value after parsing. This usually means + * the option must be specified on the command line. (Otherwise the same as .option().) + * + * The `flags` string should contain both the short and long flags, separated by comma, a pipe or space. + */ + requiredOption(flags: string, description?: string, fn?: ((arg1: any, arg2: any) => void) | RegExp, defaultValue?: any): Command; + requiredOption(flags: string, description?: string, defaultValue?: any): Command; + + + /** + * Whether to store option values as properties on command object, + * or store separately (specify false). In both cases the option values can be accessed using .opts(). + * + * @return Command for chaining + */ + storeOptionsAsProperties(value?: boolean): Command; + + /** + * Whether to pass command to action handler, + * or just the options (specify false). + * + * @return Command for chaining + */ + passCommandToAction(value?: boolean): Command; + + /** + * Allow unknown options on the command line. + * + * @param [arg] if `true` or omitted, no error will be thrown for unknown options. + * @returns Command for chaining + */ + allowUnknownOption(arg?: boolean): Command; + + /** + * Parse `argv`, setting options and invoking commands when defined. + * + * @returns Command for chaining + */ + parse(argv: string[]): Command; + + /** + * Parse `argv`, setting options and invoking commands when defined. + * + * Use parseAsync instead of parse if any of your action handlers are async. Returns a Promise. + * + * @returns Promise + */ + parseAsync(argv: string[]): Promise; + + /** + * Parse options from `argv` returning `argv` void of these options. + */ + parseOptions(argv: string[]): commander.ParseOptionsResult; + + /** + * Return an object containing options as key-value pairs + */ + opts(): { [key: string]: any }; + + /** + * Set the description. + * + * @returns Command for chaining + */ + description(str: string, argsDescription?: {[argName: string]: string}): Command; + /** + * Get the description. + */ + description(): string; + + /** + * Set an alias for the command. + * + * @returns Command for chaining + */ + alias(alias: string): Command; + /** + * Get alias for the command. + */ + alias(): string; + + /** + * Set the command usage. + * + * @returns Command for chaining + */ + usage(str: string): Command; + /** + * Get the command usage. + */ + usage(): string; + + /** + * Set the name of the command. + * + * @returns Command for chaining + */ + name(str: string): Command; + /** + * Get the name of the command. + */ + name(): string; + + /** + * Output help information for this command. + * + * When listener(s) are available for the helpLongFlag + * those callbacks are invoked. + */ + outputHelp(cb?: (str: string) => string): void; + + /** + * You can pass in flags and a description to override the help + * flags and help description for your command. + */ + helpOption(flags?: string, description?: string): Command; + + /** + * Output help information and exit. + */ + help(cb?: (str: string) => string): never; + } + type CommandConstructor = { new (name?: string): Command }; + + + interface CommandOptions { + noHelp?: boolean; + isDefault?: boolean; + executableFile?: string; + } + + interface ParseOptionsResult { + args: string[]; + unknown: string[]; + } + + interface CommanderStatic extends Command { + Command: CommandConstructor; + Option: OptionConstructor; + CommanderError:CommanderErrorConstructor; + } + +} + +declare const commander: commander.CommanderStatic; +export = commander; Index: frontend/node_modules/sucrase/package.json =================================================================== --- frontend/node_modules/sucrase/package.json (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/package.json (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,88 @@ +{ + "name": "sucrase", + "version": "3.35.1", + "description": "Super-fast alternative to Babel for when you can target modern JS runtimes", + "author": "Alan Pierce ", + "license": "MIT", + "main": "dist/index.js", + "module": "dist/esm/index.js", + "types": "dist/types/index.d.ts", + "bin": { + "sucrase": "./bin/sucrase", + "sucrase-node": "./bin/sucrase-node" + }, + "scripts": { + "build": "sucrase-node script/build.ts", + "fast-build": "sucrase-node script/build.ts --fast", + "clean": "rm -rf ./build ./dist ./dist-self-build ./dist-types ./example-runner/example-repos ./spec-compliance-tests/test262/test262-checkout ./spec-compliance-tests/babel-tests/babel-tests-checkout", + "generate": "sucrase-node generator/generate.ts", + "benchmark": "cd benchmark && yarn && sucrase-node ./benchmark.ts", + "benchmark-compare": "sucrase-node ./benchmark/compare-performance.ts", + "microbenchmark": "sucrase-node benchmark/microbenchmark.ts", + "lint": "sucrase-node script/lint.ts", + "lint-fix": "sucrase-node script/lint.ts --fix", + "profile": "node --inspect-brk ./node_modules/.bin/sucrase-node ./benchmark/profile", + "profile-project": "node --inspect-brk ./node_modules/.bin/sucrase-node ./benchmark/benchmark-project.ts --profile", + "prepublishOnly": "yarn clean && yarn build", + "release": "sucrase-node script/release.ts", + "run-examples": "sucrase-node example-runner/example-runner.ts", + "test": "yarn lint && yarn test-only", + "test-only": "mocha './test/**/*.ts'", + "integration-test": "cd integration-test && yarn && yarn link @sucrase/jest-plugin && mocha --timeout 10000 ./integration-tests.ts", + "test262": "sucrase-node spec-compliance-tests/test262/run-test262.ts", + "check-babel-tests": "sucrase-node spec-compliance-tests/babel-tests/check-babel-tests.ts", + "test-with-coverage": "nyc mocha './test/**/*.ts'", + "report-coverage": "nyc report --reporter=text-lcov > coverage.lcov && codecov" + }, + "repository": { + "type": "git", + "url": "https://github.com/alangpierce/sucrase.git" + }, + "keywords": [ + "babel", + "jsx", + "typescript", + "flow" + ], + "bugs": { + "url": "https://github.com/alangpierce/sucrase/issues" + }, + "devDependencies": { + "@babel/core": "^7.22.5", + "@jridgewell/trace-mapping": "^0.3.18", + "@types/mocha": "^9.1.1", + "@types/mz": "^2.7.4", + "@types/node": "^20.3.2", + "@typescript-eslint/eslint-plugin": "^5.60.1", + "@typescript-eslint/parser": "^5.60.1", + "chalk": "^4", + "codecov": "^3.8.3", + "eslint": "^8.43.0", + "eslint-config-airbnb-base": "^15.0.0", + "eslint-config-prettier": "^8.8.0", + "eslint-plugin-import": "~2.26", + "eslint-plugin-prettier": "^4.2.1", + "mocha": "^10.2.0", + "nyc": "^15.1.0", + "prettier": "^2.8.8", + "sucrase": "^3.35.0", + "test262-harness": "^10.0.0", + "ts-interface-builder": "^0.3.3", + "typescript": "~5.0" + }, + "dependencies": { + "@jridgewell/gen-mapping": "^0.3.2", + "commander": "^4.0.0", + "lines-and-columns": "^1.1.6", + "mz": "^2.7.0", + "pirates": "^4.0.1", + "tinyglobby": "^0.2.11", + "ts-interface-checker": "^0.1.9" + }, + "engines": { + "node": ">=16 || 14 >=14.17" + }, + "resolutions": { + "**/eshost/socket.io": "4.7.0" + } +} Index: frontend/node_modules/sucrase/register/index.js =================================================================== --- frontend/node_modules/sucrase/register/index.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/register/index.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,1 @@ +require("../dist/register").registerAll(); Index: frontend/node_modules/sucrase/register/js.js =================================================================== --- frontend/node_modules/sucrase/register/js.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/register/js.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,1 @@ +require("../dist/register").registerJS(); Index: frontend/node_modules/sucrase/register/jsx.js =================================================================== --- frontend/node_modules/sucrase/register/jsx.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/register/jsx.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,1 @@ +require("../dist/register").registerJSX(); Index: frontend/node_modules/sucrase/register/ts-legacy-module-interop.js =================================================================== --- frontend/node_modules/sucrase/register/ts-legacy-module-interop.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/register/ts-legacy-module-interop.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,1 @@ +require("../dist/register").registerTSLegacyModuleInterop(); Index: frontend/node_modules/sucrase/register/ts.js =================================================================== --- frontend/node_modules/sucrase/register/ts.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/register/ts.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,1 @@ +require("../dist/register").registerTS(); Index: frontend/node_modules/sucrase/register/tsx-legacy-module-interop.js =================================================================== --- frontend/node_modules/sucrase/register/tsx-legacy-module-interop.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/register/tsx-legacy-module-interop.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,1 @@ +require("../dist/register").registerTSXLegacyModuleInterop(); Index: frontend/node_modules/sucrase/register/tsx.js =================================================================== --- frontend/node_modules/sucrase/register/tsx.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/register/tsx.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,1 @@ +require("../dist/register").registerTSX(); Index: frontend/node_modules/sucrase/ts-node-plugin/index.js =================================================================== --- frontend/node_modules/sucrase/ts-node-plugin/index.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/sucrase/ts-node-plugin/index.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,83 @@ +const {transform} = require("../dist"); + +// Enum constants taken from the TypeScript codebase. +const ModuleKindCommonJS = 1; + +const JsxEmitReactJSX = 4; +const JsxEmitReactJSXDev = 5; + +/** + * ts-node transpiler plugin + * + * This plugin hooks into ts-node so that Sucrase can handle all TS-to-JS + * conversion while ts-node handles the ESM loader, require hook, REPL + * integration, etc. ts-node automatically discovers the relevant tsconfig file, + * so the main logic in this integration is translating tsconfig options to the + * corresponding Sucrase options. + * + * Any tsconfig options relevant to Sucrase are translated, but some config + * options outside the scope of Sucrase are ignored. For example, we assume the + * isolatedModules option, and we ignore target because Sucrase doesn't provide + * JS syntax downleveling (at least not in a way that is useful for Node). + * + * One notable caveat is that importsNotUsedAsValues and preserveValueImports + * are ignored right now, since they are deprecated and don't have exact Sucrase + * equivalents. To preserve imports and exports, use verbatimModuleSyntax. + */ +function create(createOptions) { + const {nodeModuleEmitKind} = createOptions; + const { + module, + jsx, + jsxFactory, + jsxFragmentFactory, + jsxImportSource, + esModuleInterop, + verbatimModuleSyntax, + } = createOptions.service.config.options; + + return { + transpile(input, transpileOptions) { + const {fileName} = transpileOptions; + const transforms = []; + // Detect JS rather than TS so we bias toward including the typescript + // transform, since almost always it doesn't hurt to include. + const isJS = + fileName.endsWith(".js") || + fileName.endsWith(".jsx") || + fileName.endsWith(".mjs") || + fileName.endsWith(".cjs"); + if (!isJS) { + transforms.push("typescript"); + } + if (module === ModuleKindCommonJS || nodeModuleEmitKind === "nodecjs") { + transforms.push("imports"); + } + if (fileName.endsWith(".tsx") || fileName.endsWith(".jsx")) { + transforms.push("jsx"); + } + + const {code, sourceMap} = transform(input, { + transforms, + disableESTransforms: true, + jsxRuntime: jsx === JsxEmitReactJSX || jsx === JsxEmitReactJSXDev ? "automatic" : "classic", + production: jsx === JsxEmitReactJSX, + jsxImportSource, + jsxPragma: jsxFactory, + jsxFragmentPragma: jsxFragmentFactory, + keepUnusedImports: verbatimModuleSyntax, + preserveDynamicImport: nodeModuleEmitKind === "nodecjs", + injectCreateRequireForImportRequire: nodeModuleEmitKind === "nodeesm", + enableLegacyTypeScriptModuleInterop: !esModuleInterop, + sourceMapOptions: {compiledFilename: fileName}, + filePath: fileName, + }); + return { + outputText: code, + sourceMapText: JSON.stringify(sourceMap), + }; + }, + }; +} + +exports.create = create;