Index: frontend/node_modules/espree/lib/espree.js =================================================================== --- frontend/node_modules/espree/lib/espree.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/espree/lib/espree.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,349 @@ +/* eslint no-param-reassign: 0 -- stylistic choice */ + +import TokenTranslator from "./token-translator.js"; +import { normalizeOptions } from "./options.js"; + + +const STATE = Symbol("espree's internal state"); +const ESPRIMA_FINISH_NODE = Symbol("espree's esprimaFinishNode"); + + +/** + * Converts an Acorn comment to a Esprima comment. + * @param {boolean} block True if it's a block comment, false if not. + * @param {string} text The text of the comment. + * @param {int} start The index at which the comment starts. + * @param {int} end The index at which the comment ends. + * @param {Location} startLoc The location at which the comment starts. + * @param {Location} endLoc The location at which the comment ends. + * @param {string} code The source code being parsed. + * @returns {Object} The comment object. + * @private + */ +function convertAcornCommentToEsprimaComment(block, text, start, end, startLoc, endLoc, code) { + let type; + + if (block) { + type = "Block"; + } else if (code.slice(start, start + 2) === "#!") { + type = "Hashbang"; + } else { + type = "Line"; + } + + const comment = { + type, + value: text + }; + + if (typeof start === "number") { + comment.start = start; + comment.end = end; + comment.range = [start, end]; + } + + if (typeof startLoc === "object") { + comment.loc = { + start: startLoc, + end: endLoc + }; + } + + return comment; +} + +export default () => Parser => { + const tokTypes = Object.assign({}, Parser.acorn.tokTypes); + + if (Parser.acornJsx) { + Object.assign(tokTypes, Parser.acornJsx.tokTypes); + } + + return class Espree extends Parser { + constructor(opts, code) { + if (typeof opts !== "object" || opts === null) { + opts = {}; + } + if (typeof code !== "string" && !(code instanceof String)) { + code = String(code); + } + + // save original source type in case of commonjs + const originalSourceType = opts.sourceType; + const options = normalizeOptions(opts); + const ecmaFeatures = options.ecmaFeatures || {}; + const tokenTranslator = + options.tokens === true + ? new TokenTranslator(tokTypes, code) + : null; + + /* + * Data that is unique to Espree and is not represented internally + * in Acorn. + * + * For ES2023 hashbangs, Espree will call `onComment()` during the + * constructor, so we must define state before having access to + * `this`. + */ + const state = { + originalSourceType: originalSourceType || options.sourceType, + tokens: tokenTranslator ? [] : null, + comments: options.comment === true ? [] : null, + impliedStrict: ecmaFeatures.impliedStrict === true && options.ecmaVersion >= 5, + ecmaVersion: options.ecmaVersion, + jsxAttrValueToken: false, + lastToken: null, + templateElements: [] + }; + + // Initialize acorn parser. + super({ + + // do not use spread, because we don't want to pass any unknown options to acorn + ecmaVersion: options.ecmaVersion, + sourceType: options.sourceType, + ranges: options.ranges, + locations: options.locations, + allowReserved: options.allowReserved, + + // Truthy value is true for backward compatibility. + allowReturnOutsideFunction: options.allowReturnOutsideFunction, + + // Collect tokens + onToken(token) { + if (tokenTranslator) { + + // Use `tokens`, `ecmaVersion`, and `jsxAttrValueToken` in the state. + tokenTranslator.onToken(token, state); + } + if (token.type !== tokTypes.eof) { + state.lastToken = token; + } + }, + + // Collect comments + onComment(block, text, start, end, startLoc, endLoc) { + if (state.comments) { + const comment = convertAcornCommentToEsprimaComment(block, text, start, end, startLoc, endLoc, code); + + state.comments.push(comment); + } + } + }, code); + + /* + * We put all of this data into a symbol property as a way to avoid + * potential naming conflicts with future versions of Acorn. + */ + this[STATE] = state; + } + + tokenize() { + do { + this.next(); + } while (this.type !== tokTypes.eof); + + // Consume the final eof token + this.next(); + + const extra = this[STATE]; + const tokens = extra.tokens; + + if (extra.comments) { + tokens.comments = extra.comments; + } + + return tokens; + } + + finishNode(...args) { + const result = super.finishNode(...args); + + return this[ESPRIMA_FINISH_NODE](result); + } + + finishNodeAt(...args) { + const result = super.finishNodeAt(...args); + + return this[ESPRIMA_FINISH_NODE](result); + } + + parse() { + const extra = this[STATE]; + const program = super.parse(); + + program.sourceType = extra.originalSourceType; + + if (extra.comments) { + program.comments = extra.comments; + } + if (extra.tokens) { + program.tokens = extra.tokens; + } + + /* + * Adjust opening and closing position of program to match Esprima. + * Acorn always starts programs at range 0 whereas Esprima starts at the + * first AST node's start (the only real difference is when there's leading + * whitespace or leading comments). Acorn also counts trailing whitespace + * as part of the program whereas Esprima only counts up to the last token. + */ + if (program.body.length) { + const [firstNode] = program.body; + + if (program.range) { + program.range[0] = firstNode.range[0]; + } + if (program.loc) { + program.loc.start = firstNode.loc.start; + } + program.start = firstNode.start; + } + if (extra.lastToken) { + if (program.range) { + program.range[1] = extra.lastToken.range[1]; + } + if (program.loc) { + program.loc.end = extra.lastToken.loc.end; + } + program.end = extra.lastToken.end; + } + + + /* + * https://github.com/eslint/espree/issues/349 + * Ensure that template elements have correct range information. + * This is one location where Acorn produces a different value + * for its start and end properties vs. the values present in the + * range property. In order to avoid confusion, we set the start + * and end properties to the values that are present in range. + * This is done here, instead of in finishNode(), because Acorn + * uses the values of start and end internally while parsing, making + * it dangerous to change those values while parsing is ongoing. + * By waiting until the end of parsing, we can safely change these + * values without affect any other part of the process. + */ + this[STATE].templateElements.forEach(templateElement => { + const startOffset = -1; + const endOffset = templateElement.tail ? 1 : 2; + + templateElement.start += startOffset; + templateElement.end += endOffset; + + if (templateElement.range) { + templateElement.range[0] += startOffset; + templateElement.range[1] += endOffset; + } + + if (templateElement.loc) { + templateElement.loc.start.column += startOffset; + templateElement.loc.end.column += endOffset; + } + }); + + return program; + } + + parseTopLevel(node) { + if (this[STATE].impliedStrict) { + this.strict = true; + } + return super.parseTopLevel(node); + } + + /** + * Overwrites the default raise method to throw Esprima-style errors. + * @param {int} pos The position of the error. + * @param {string} message The error message. + * @throws {SyntaxError} A syntax error. + * @returns {void} + */ + raise(pos, message) { + const loc = Parser.acorn.getLineInfo(this.input, pos); + const err = new SyntaxError(message); + + err.index = pos; + err.lineNumber = loc.line; + err.column = loc.column + 1; // acorn uses 0-based columns + throw err; + } + + /** + * Overwrites the default raise method to throw Esprima-style errors. + * @param {int} pos The position of the error. + * @param {string} message The error message. + * @throws {SyntaxError} A syntax error. + * @returns {void} + */ + raiseRecoverable(pos, message) { + this.raise(pos, message); + } + + /** + * Overwrites the default unexpected method to throw Esprima-style errors. + * @param {int} pos The position of the error. + * @throws {SyntaxError} A syntax error. + * @returns {void} + */ + unexpected(pos) { + let message = "Unexpected token"; + + if (pos !== null && pos !== void 0) { + this.pos = pos; + + if (this.options.locations) { + while (this.pos < this.lineStart) { + this.lineStart = this.input.lastIndexOf("\n", this.lineStart - 2) + 1; + --this.curLine; + } + } + + this.nextToken(); + } + + if (this.end > this.start) { + message += ` ${this.input.slice(this.start, this.end)}`; + } + + this.raise(this.start, message); + } + + /* + * Esprima-FB represents JSX strings as tokens called "JSXText", but Acorn-JSX + * uses regular tt.string without any distinction between this and regular JS + * strings. As such, we intercept an attempt to read a JSX string and set a flag + * on extra so that when tokens are converted, the next token will be switched + * to JSXText via onToken. + */ + jsx_readString(quote) { // eslint-disable-line camelcase -- required by API + const result = super.jsx_readString(quote); + + if (this.type === tokTypes.string) { + this[STATE].jsxAttrValueToken = true; + } + return result; + } + + /** + * Performs last-minute Esprima-specific compatibility checks and fixes. + * @param {ASTNode} result The node to check. + * @returns {ASTNode} The finished node. + */ + [ESPRIMA_FINISH_NODE](result) { + + // Acorn doesn't count the opening and closing backticks as part of templates + // so we have to adjust ranges/locations appropriately. + if (result.type === "TemplateElement") { + + // save template element references to fix start/end later + this[STATE].templateElements.push(result); + } + + if (result.type.includes("Function") && !result.generator) { + result.generator = false; + } + + return result; + } + }; +}; Index: frontend/node_modules/espree/lib/features.js =================================================================== --- frontend/node_modules/espree/lib/features.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/espree/lib/features.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,27 @@ +/** + * @fileoverview The list of feature flags supported by the parser and their default + * settings. + * @author Nicholas C. Zakas + */ + +//------------------------------------------------------------------------------ +// Requirements +//------------------------------------------------------------------------------ + +// None! + +//------------------------------------------------------------------------------ +// Public +//------------------------------------------------------------------------------ + +export default { + + // React JSX parsing + jsx: false, + + // allow return statement in global scope + globalReturn: false, + + // allow implied strict mode + impliedStrict: false +}; Index: frontend/node_modules/espree/lib/options.js =================================================================== --- frontend/node_modules/espree/lib/options.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/espree/lib/options.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,123 @@ +/** + * @fileoverview A collection of methods for processing Espree's options. + * @author Kai Cataldo + */ + +//------------------------------------------------------------------------------ +// Helpers +//------------------------------------------------------------------------------ + +const SUPPORTED_VERSIONS = [ + 3, + 5, + 6, // 2015 + 7, // 2016 + 8, // 2017 + 9, // 2018 + 10, // 2019 + 11, // 2020 + 12, // 2021 + 13, // 2022 + 14, // 2023 + 15 // 2024 +]; + +/** + * Get the latest ECMAScript version supported by Espree. + * @returns {number} The latest ECMAScript version. + */ +export function getLatestEcmaVersion() { + return SUPPORTED_VERSIONS[SUPPORTED_VERSIONS.length - 1]; +} + +/** + * Get the list of ECMAScript versions supported by Espree. + * @returns {number[]} An array containing the supported ECMAScript versions. + */ +export function getSupportedEcmaVersions() { + return [...SUPPORTED_VERSIONS]; +} + +/** + * Normalize ECMAScript version from the initial config + * @param {(number|"latest")} ecmaVersion ECMAScript version from the initial config + * @throws {Error} throws an error if the ecmaVersion is invalid. + * @returns {number} normalized ECMAScript version + */ +function normalizeEcmaVersion(ecmaVersion = 5) { + + let version = ecmaVersion === "latest" ? getLatestEcmaVersion() : ecmaVersion; + + if (typeof version !== "number") { + throw new Error(`ecmaVersion must be a number or "latest". Received value of type ${typeof ecmaVersion} instead.`); + } + + // Calculate ECMAScript edition number from official year version starting with + // ES2015, which corresponds with ES6 (or a difference of 2009). + if (version >= 2015) { + version -= 2009; + } + + if (!SUPPORTED_VERSIONS.includes(version)) { + throw new Error("Invalid ecmaVersion."); + } + + return version; +} + +/** + * Normalize sourceType from the initial config + * @param {string} sourceType to normalize + * @throws {Error} throw an error if sourceType is invalid + * @returns {string} normalized sourceType + */ +function normalizeSourceType(sourceType = "script") { + if (sourceType === "script" || sourceType === "module") { + return sourceType; + } + + if (sourceType === "commonjs") { + return "script"; + } + + throw new Error("Invalid sourceType."); +} + +/** + * Normalize parserOptions + * @param {Object} options the parser options to normalize + * @throws {Error} throw an error if found invalid option. + * @returns {Object} normalized options + */ +export function normalizeOptions(options) { + const ecmaVersion = normalizeEcmaVersion(options.ecmaVersion); + const sourceType = normalizeSourceType(options.sourceType); + const ranges = options.range === true; + const locations = options.loc === true; + + if (ecmaVersion !== 3 && options.allowReserved) { + + // a value of `false` is intentionally allowed here, so a shared config can overwrite it when needed + throw new Error("`allowReserved` is only supported when ecmaVersion is 3"); + } + if (typeof options.allowReserved !== "undefined" && typeof options.allowReserved !== "boolean") { + throw new Error("`allowReserved`, when present, must be `true` or `false`"); + } + const allowReserved = ecmaVersion === 3 ? (options.allowReserved || "never") : false; + const ecmaFeatures = options.ecmaFeatures || {}; + const allowReturnOutsideFunction = options.sourceType === "commonjs" || + Boolean(ecmaFeatures.globalReturn); + + if (sourceType === "module" && ecmaVersion < 6) { + throw new Error("sourceType 'module' is not supported when ecmaVersion < 2015. Consider adding `{ ecmaVersion: 2015 }` to the parser options."); + } + + return Object.assign({}, options, { + ecmaVersion, + sourceType, + ranges, + locations, + allowReserved, + allowReturnOutsideFunction + }); +} Index: frontend/node_modules/espree/lib/token-translator.js =================================================================== --- frontend/node_modules/espree/lib/token-translator.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/espree/lib/token-translator.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,263 @@ +/** + * @fileoverview Translates tokens between Acorn format and Esprima format. + * @author Nicholas C. Zakas + */ + +//------------------------------------------------------------------------------ +// Requirements +//------------------------------------------------------------------------------ + +// none! + +//------------------------------------------------------------------------------ +// Private +//------------------------------------------------------------------------------ + + +// Esprima Token Types +const Token = { + Boolean: "Boolean", + EOF: "", + Identifier: "Identifier", + PrivateIdentifier: "PrivateIdentifier", + Keyword: "Keyword", + Null: "Null", + Numeric: "Numeric", + Punctuator: "Punctuator", + String: "String", + RegularExpression: "RegularExpression", + Template: "Template", + JSXIdentifier: "JSXIdentifier", + JSXText: "JSXText" +}; + +/** + * Converts part of a template into an Esprima token. + * @param {AcornToken[]} tokens The Acorn tokens representing the template. + * @param {string} code The source code. + * @returns {EsprimaToken} The Esprima equivalent of the template token. + * @private + */ +function convertTemplatePart(tokens, code) { + const firstToken = tokens[0], + lastTemplateToken = tokens[tokens.length - 1]; + + const token = { + type: Token.Template, + value: code.slice(firstToken.start, lastTemplateToken.end) + }; + + if (firstToken.loc) { + token.loc = { + start: firstToken.loc.start, + end: lastTemplateToken.loc.end + }; + } + + if (firstToken.range) { + token.start = firstToken.range[0]; + token.end = lastTemplateToken.range[1]; + token.range = [token.start, token.end]; + } + + return token; +} + +/** + * Contains logic to translate Acorn tokens into Esprima tokens. + * @param {Object} acornTokTypes The Acorn token types. + * @param {string} code The source code Acorn is parsing. This is necessary + * to correct the "value" property of some tokens. + * @constructor + */ +function TokenTranslator(acornTokTypes, code) { + + // token types + this._acornTokTypes = acornTokTypes; + + // token buffer for templates + this._tokens = []; + + // track the last curly brace + this._curlyBrace = null; + + // the source code + this._code = code; + +} + +TokenTranslator.prototype = { + constructor: TokenTranslator, + + /** + * Translates a single Esprima token to a single Acorn token. This may be + * inaccurate due to how templates are handled differently in Esprima and + * Acorn, but should be accurate for all other tokens. + * @param {AcornToken} token The Acorn token to translate. + * @param {Object} extra Espree extra object. + * @returns {EsprimaToken} The Esprima version of the token. + */ + translate(token, extra) { + + const type = token.type, + tt = this._acornTokTypes; + + if (type === tt.name) { + token.type = Token.Identifier; + + // TODO: See if this is an Acorn bug + if (token.value === "static") { + token.type = Token.Keyword; + } + + if (extra.ecmaVersion > 5 && (token.value === "yield" || token.value === "let")) { + token.type = Token.Keyword; + } + + } else if (type === tt.privateId) { + token.type = Token.PrivateIdentifier; + + } else if (type === tt.semi || type === tt.comma || + type === tt.parenL || type === tt.parenR || + type === tt.braceL || type === tt.braceR || + type === tt.dot || type === tt.bracketL || + type === tt.colon || type === tt.question || + type === tt.bracketR || type === tt.ellipsis || + type === tt.arrow || type === tt.jsxTagStart || + type === tt.incDec || type === tt.starstar || + type === tt.jsxTagEnd || type === tt.prefix || + type === tt.questionDot || + (type.binop && !type.keyword) || + type.isAssign) { + + token.type = Token.Punctuator; + token.value = this._code.slice(token.start, token.end); + } else if (type === tt.jsxName) { + token.type = Token.JSXIdentifier; + } else if (type.label === "jsxText" || type === tt.jsxAttrValueToken) { + token.type = Token.JSXText; + } else if (type.keyword) { + if (type.keyword === "true" || type.keyword === "false") { + token.type = Token.Boolean; + } else if (type.keyword === "null") { + token.type = Token.Null; + } else { + token.type = Token.Keyword; + } + } else if (type === tt.num) { + token.type = Token.Numeric; + token.value = this._code.slice(token.start, token.end); + } else if (type === tt.string) { + + if (extra.jsxAttrValueToken) { + extra.jsxAttrValueToken = false; + token.type = Token.JSXText; + } else { + token.type = Token.String; + } + + token.value = this._code.slice(token.start, token.end); + } else if (type === tt.regexp) { + token.type = Token.RegularExpression; + const value = token.value; + + token.regex = { + flags: value.flags, + pattern: value.pattern + }; + token.value = `/${value.pattern}/${value.flags}`; + } + + return token; + }, + + /** + * Function to call during Acorn's onToken handler. + * @param {AcornToken} token The Acorn token. + * @param {Object} extra The Espree extra object. + * @returns {void} + */ + onToken(token, extra) { + + const tt = this._acornTokTypes, + tokens = extra.tokens, + templateTokens = this._tokens; + + /** + * Flushes the buffered template tokens and resets the template + * tracking. + * @returns {void} + * @private + */ + const translateTemplateTokens = () => { + tokens.push(convertTemplatePart(this._tokens, this._code)); + this._tokens = []; + }; + + if (token.type === tt.eof) { + + // might be one last curlyBrace + if (this._curlyBrace) { + tokens.push(this.translate(this._curlyBrace, extra)); + } + + return; + } + + if (token.type === tt.backQuote) { + + // if there's already a curly, it's not part of the template + if (this._curlyBrace) { + tokens.push(this.translate(this._curlyBrace, extra)); + this._curlyBrace = null; + } + + templateTokens.push(token); + + // it's the end + if (templateTokens.length > 1) { + translateTemplateTokens(); + } + + return; + } + if (token.type === tt.dollarBraceL) { + templateTokens.push(token); + translateTemplateTokens(); + return; + } + if (token.type === tt.braceR) { + + // if there's already a curly, it's not part of the template + if (this._curlyBrace) { + tokens.push(this.translate(this._curlyBrace, extra)); + } + + // store new curly for later + this._curlyBrace = token; + return; + } + if (token.type === tt.template || token.type === tt.invalidTemplate) { + if (this._curlyBrace) { + templateTokens.push(this._curlyBrace); + this._curlyBrace = null; + } + + templateTokens.push(token); + return; + } + + if (this._curlyBrace) { + tokens.push(this.translate(this._curlyBrace, extra)); + this._curlyBrace = null; + } + + tokens.push(this.translate(token, extra)); + } +}; + +//------------------------------------------------------------------------------ +// Public +//------------------------------------------------------------------------------ + +export default TokenTranslator; Index: frontend/node_modules/espree/lib/version.js =================================================================== --- frontend/node_modules/espree/lib/version.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/espree/lib/version.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,3 @@ +const version = "9.6.1"; + +export default version;