[6a3a178] | 1 | import * as _acorn from "acorn";
|
---|
| 2 |
|
---|
| 3 | const leftCurlyBrace = "{".charCodeAt(0);
|
---|
| 4 | const space = " ".charCodeAt(0);
|
---|
| 5 |
|
---|
| 6 | const keyword = "assert";
|
---|
| 7 | const FUNC_STATEMENT = 1, FUNC_HANGING_STATEMENT = 2, FUNC_NULLABLE_ID = 4
|
---|
| 8 |
|
---|
| 9 | export function importAssertions(Parser) {
|
---|
| 10 | // Use supplied version acorn version if present, to avoid
|
---|
| 11 | // reference mismatches due to different acorn versions. This
|
---|
| 12 | // allows this plugin to be used with Rollup which supplies
|
---|
| 13 | // its own internal version of acorn and thereby sidesteps
|
---|
| 14 | // the package manager.
|
---|
| 15 | const acorn = Parser.acorn || _acorn;
|
---|
| 16 | const { tokTypes: tt, TokenType } = acorn;
|
---|
| 17 |
|
---|
| 18 | return class extends Parser {
|
---|
| 19 | constructor(...args) {
|
---|
| 20 | super(...args);
|
---|
| 21 | this.assertToken = new TokenType(keyword);
|
---|
| 22 | }
|
---|
| 23 |
|
---|
| 24 | _codeAt(i) {
|
---|
| 25 | return this.input.charCodeAt(i);
|
---|
| 26 | }
|
---|
| 27 |
|
---|
| 28 | _eat(t) {
|
---|
| 29 | if (this.type !== t) {
|
---|
| 30 | this.unexpected();
|
---|
| 31 | }
|
---|
| 32 | this.next();
|
---|
| 33 | }
|
---|
| 34 |
|
---|
| 35 | readToken(code) {
|
---|
| 36 | let i = 0;
|
---|
| 37 | for (; i < keyword.length; i++) {
|
---|
| 38 | if (this._codeAt(this.pos + i) !== keyword.charCodeAt(i)) {
|
---|
| 39 | return super.readToken(code);
|
---|
| 40 | }
|
---|
| 41 | }
|
---|
| 42 |
|
---|
| 43 | // ensure that the keyword is at the correct location
|
---|
| 44 | // ie `assert{...` or `assert {...`
|
---|
| 45 | for (;; i++) {
|
---|
| 46 | if (this._codeAt(this.pos + i) === leftCurlyBrace) {
|
---|
| 47 | // Found '{'
|
---|
| 48 | break;
|
---|
| 49 | } else if (this._codeAt(this.pos + i) === space) {
|
---|
| 50 | // white space is allowed between `assert` and `{`, so continue.
|
---|
| 51 | continue;
|
---|
| 52 | } else {
|
---|
| 53 | return super.readToken(code);
|
---|
| 54 | }
|
---|
| 55 | }
|
---|
| 56 |
|
---|
| 57 | // If we're inside a dynamic import expression we'll parse
|
---|
| 58 | // the `assert` keyword as a standard object property name
|
---|
| 59 | // ie `import(""./foo.json", { assert: { type: "json" } })`
|
---|
| 60 | if (this.type.label === "{") {
|
---|
| 61 | return super.readToken(code);
|
---|
| 62 | }
|
---|
| 63 |
|
---|
| 64 | this.pos += keyword.length;
|
---|
| 65 | return this.finishToken(this.assertToken);
|
---|
| 66 | }
|
---|
| 67 |
|
---|
| 68 | parseDynamicImport(node) {
|
---|
| 69 | this.next(); // skip `(`
|
---|
| 70 |
|
---|
| 71 | // Parse node.source.
|
---|
| 72 | node.source = this.parseMaybeAssign();
|
---|
| 73 |
|
---|
| 74 | if (this.eat(tt.comma)) {
|
---|
| 75 | const obj = this.parseObj(false);
|
---|
| 76 | node.arguments = [obj];
|
---|
| 77 | }
|
---|
| 78 | this._eat(tt.parenR);
|
---|
| 79 | return this.finishNode(node, "ImportExpression");
|
---|
| 80 | }
|
---|
| 81 |
|
---|
| 82 | // ported from acorn/src/statement.js pp.parseExport
|
---|
| 83 | parseExport(node, exports) {
|
---|
| 84 | this.next();
|
---|
| 85 | // export * from '...'
|
---|
| 86 | if (this.eat(tt.star)) {
|
---|
| 87 | if (this.options.ecmaVersion >= 11) {
|
---|
| 88 | if (this.eatContextual("as")) {
|
---|
| 89 | node.exported = this.parseIdent(true);
|
---|
| 90 | this.checkExport(exports, node.exported.name, this.lastTokStart);
|
---|
| 91 | } else {
|
---|
| 92 | node.exported = null;
|
---|
| 93 | }
|
---|
| 94 | }
|
---|
| 95 | this.expectContextual("from");
|
---|
| 96 | if (this.type !== tt.string) { this.unexpected(); }
|
---|
| 97 | node.source = this.parseExprAtom();
|
---|
| 98 |
|
---|
| 99 | if (this.type === this.assertToken) {
|
---|
| 100 | this.next();
|
---|
| 101 | const assertions = this.parseImportAssertions();
|
---|
| 102 | if (assertions) {
|
---|
| 103 | node.assertions = assertions;
|
---|
| 104 | }
|
---|
| 105 | }
|
---|
| 106 |
|
---|
| 107 | this.semicolon();
|
---|
| 108 | return this.finishNode(node, "ExportAllDeclaration")
|
---|
| 109 | }
|
---|
| 110 | if (this.eat(tt._default)) { // export default ...
|
---|
| 111 | this.checkExport(exports, "default", this.lastTokStart);
|
---|
| 112 | var isAsync;
|
---|
| 113 | if (this.type === tt._function || (isAsync = this.isAsyncFunction())) {
|
---|
| 114 | var fNode = this.startNode();
|
---|
| 115 | this.next();
|
---|
| 116 | if (isAsync) { this.next(); }
|
---|
| 117 | node.declaration = this.parseFunction(fNode, FUNC_STATEMENT | FUNC_NULLABLE_ID, false, isAsync);
|
---|
| 118 | } else if (this.type === tt._class) {
|
---|
| 119 | var cNode = this.startNode();
|
---|
| 120 | node.declaration = this.parseClass(cNode, "nullableID");
|
---|
| 121 | } else {
|
---|
| 122 | node.declaration = this.parseMaybeAssign();
|
---|
| 123 | this.semicolon();
|
---|
| 124 | }
|
---|
| 125 | return this.finishNode(node, "ExportDefaultDeclaration")
|
---|
| 126 | }
|
---|
| 127 | // export var|const|let|function|class ...
|
---|
| 128 | if (this.shouldParseExportStatement()) {
|
---|
| 129 | node.declaration = this.parseStatement(null);
|
---|
| 130 | if (node.declaration.type === "VariableDeclaration")
|
---|
| 131 | { this.checkVariableExport(exports, node.declaration.declarations); }
|
---|
| 132 | else
|
---|
| 133 | { this.checkExport(exports, node.declaration.id.name, node.declaration.id.start); }
|
---|
| 134 | node.specifiers = [];
|
---|
| 135 | node.source = null;
|
---|
| 136 | } else { // export { x, y as z } [from '...']
|
---|
| 137 | node.declaration = null;
|
---|
| 138 | node.specifiers = this.parseExportSpecifiers(exports);
|
---|
| 139 | if (this.eatContextual("from")) {
|
---|
| 140 | if (this.type !== tt.string) { this.unexpected(); }
|
---|
| 141 | node.source = this.parseExprAtom();
|
---|
| 142 |
|
---|
| 143 | if (this.type === this.assertToken) {
|
---|
| 144 | this.next();
|
---|
| 145 | const assertions = this.parseImportAssertions();
|
---|
| 146 | if (assertions) {
|
---|
| 147 | node.assertions = assertions;
|
---|
| 148 | }
|
---|
| 149 | }
|
---|
| 150 | } else {
|
---|
| 151 | for (var i = 0, list = node.specifiers; i < list.length; i += 1) {
|
---|
| 152 | // check for keywords used as local names
|
---|
| 153 | var spec = list[i];
|
---|
| 154 |
|
---|
| 155 | this.checkUnreserved(spec.local);
|
---|
| 156 | // check if export is defined
|
---|
| 157 | this.checkLocalExport(spec.local);
|
---|
| 158 | }
|
---|
| 159 |
|
---|
| 160 | node.source = null;
|
---|
| 161 | }
|
---|
| 162 | this.semicolon();
|
---|
| 163 | }
|
---|
| 164 | return this.finishNode(node, "ExportNamedDeclaration")
|
---|
| 165 | }
|
---|
| 166 |
|
---|
| 167 | parseImport(node) {
|
---|
| 168 | this.next();
|
---|
| 169 | // import '...'
|
---|
| 170 | if (this.type === tt.string) {
|
---|
| 171 | node.specifiers = [];
|
---|
| 172 | node.source = this.parseExprAtom();
|
---|
| 173 | } else {
|
---|
| 174 | node.specifiers = this.parseImportSpecifiers();
|
---|
| 175 | this.expectContextual("from");
|
---|
| 176 | node.source =
|
---|
| 177 | this.type === tt.string ? this.parseExprAtom() : this.unexpected();
|
---|
| 178 | }
|
---|
| 179 |
|
---|
| 180 | if (this.type === this.assertToken) {
|
---|
| 181 | this.next();
|
---|
| 182 | const assertions = this.parseImportAssertions();
|
---|
| 183 | if (assertions) {
|
---|
| 184 | node.assertions = assertions;
|
---|
| 185 | }
|
---|
| 186 | }
|
---|
| 187 | this.semicolon();
|
---|
| 188 | return this.finishNode(node, "ImportDeclaration");
|
---|
| 189 | }
|
---|
| 190 |
|
---|
| 191 | parseImportAssertions() {
|
---|
| 192 | this._eat(tt.braceL);
|
---|
| 193 | const attrs = this.parseAssertEntries();
|
---|
| 194 | this._eat(tt.braceR);
|
---|
| 195 | return attrs;
|
---|
| 196 | }
|
---|
| 197 |
|
---|
| 198 | parseAssertEntries() {
|
---|
| 199 | const attrs = [];
|
---|
| 200 | const attrNames = new Set();
|
---|
| 201 |
|
---|
| 202 | do {
|
---|
| 203 | if (this.type === tt.braceR) {
|
---|
| 204 | break;
|
---|
| 205 | }
|
---|
| 206 |
|
---|
| 207 | const node = this.startNode();
|
---|
| 208 |
|
---|
| 209 | // parse AssertionKey : IdentifierName, StringLiteral
|
---|
| 210 | let assertionKeyNode;
|
---|
| 211 | if (this.type === tt.string) {
|
---|
| 212 | assertionKeyNode = this.parseLiteral(this.value);
|
---|
| 213 | } else {
|
---|
| 214 | assertionKeyNode = this.parseIdent(true);
|
---|
| 215 | }
|
---|
| 216 | this.next();
|
---|
| 217 | node.key = assertionKeyNode;
|
---|
| 218 |
|
---|
| 219 | // check if we already have an entry for an attribute
|
---|
| 220 | // if a duplicate entry is found, throw an error
|
---|
| 221 | // for now this logic will come into play only when someone declares `type` twice
|
---|
| 222 | if (attrNames.has(node.key.name)) {
|
---|
| 223 | this.raise(this.pos, "Duplicated key in assertions");
|
---|
| 224 | }
|
---|
| 225 | attrNames.add(node.key.name);
|
---|
| 226 |
|
---|
| 227 | if (this.type !== tt.string) {
|
---|
| 228 | this.raise(
|
---|
| 229 | this.pos,
|
---|
| 230 | "Only string is supported as an assertion value"
|
---|
| 231 | );
|
---|
| 232 | }
|
---|
| 233 |
|
---|
| 234 | node.value = this.parseLiteral(this.value);
|
---|
| 235 |
|
---|
| 236 | attrs.push(this.finishNode(node, "ImportAttribute"));
|
---|
| 237 | } while (this.eat(tt.comma));
|
---|
| 238 |
|
---|
| 239 | return attrs;
|
---|
| 240 | }
|
---|
| 241 | };
|
---|
| 242 | }
|
---|