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[parser] Report escapes in kws only if they won't be used as i… (#10455)

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We can do it by tokenizing escaped keywords as normal identifiers, so that they won't
be accidentally used as real keywords.
This commit is contained in:
Nicolò Ribaudo 2019-09-18 00:13:51 +02:00 committed by GitHub
parent 45a484f0a2
commit cb881e6b3f
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GPG Key ID: 4AEE18F83AFDEB23
9 changed files with 172 additions and 447 deletions
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5
packages/babel-parser/src/parser/expression.js
View File

@ -2066,6 +2066,11 @@ export default class ExpressionParser extends LValParser {
if (this.match(tt.name)) { if (this.match(tt.name)) {
name = this.state.value; name = this.state.value;
// An escaped identifier whose value is the same as a keyword
if (!liberal && this.state.containsEsc && isKeyword(name)) {
this.raise(this.state.pos, `Escape sequence in keyword ${name}`);
}
} else if (this.state.type.keyword) { } else if (this.state.type.keyword) {
name = this.state.type.keyword; name = this.state.type.keyword;

6
packages/babel-parser/src/tokenizer/index.js
View File

@ -1326,11 +1326,7 @@ export default class Tokenizer extends LocationParser {
readWord(): void { readWord(): void {
const word = this.readWord1(); const word = this.readWord1();
const type = keywordTypes.get(word) || tt.name; const type = (!this.state.containsEsc && keywordTypes.get(word)) || tt.name;
if (type.keyword && this.state.containsEsc) {
this.raise(this.state.pos, `Escape sequence in keyword ${word}`);
}
// Allow @@iterator and @@asyncIterator as a identifier only inside type // Allow @@iterator and @@asyncIterator as a identifier only inside type
if ( if (

0
packages/babel-parser/test/fixtures/core/valid-escape/async/input.js → packages/babel-parser/test/fixtures/core/escape-keyword/async/input.js vendored
View File

0
packages/babel-parser/test/fixtures/core/valid-escape/async/output.json → packages/babel-parser/test/fixtures/core/escape-keyword/async/output.json vendored
View File

3
packages/babel-parser/test/fixtures/core/escape-keyword/invalid/input.js vendored Normal file
View File

@ -0,0 +1,3 @@
var a = {
br\u{65}ak
};

3
packages/babel-parser/test/fixtures/core/escape-keyword/invalid/options.json vendored Normal file
View File

@ -0,0 +1,3 @@
{
"throws": "Unexpected keyword 'break' (2:2)"
}

3
packages/babel-parser/test/fixtures/core/escape-keyword/used-as-property/input.js vendored Normal file
View File

@ -0,0 +1,3 @@
var a = {
br\u{65}ak: 2
};

157
packages/babel-parser/test/fixtures/core/escape-keyword/used-as-property/output.json vendored Normal file
View File

@ -0,0 +1,157 @@
{
"type": "File",
"start": 0,
"end": 28,
"loc": {
"start": {
"line": 1,
"column": 0
},
"end": {
"line": 3,
"column": 2
}
},
"program": {
"type": "Program",
"start": 0,
"end": 28,
"loc": {
"start": {
"line": 1,
"column": 0
},
"end": {
"line": 3,
"column": 2
}
},
"sourceType": "script",
"interpreter": null,
"body": [
{
"type": "VariableDeclaration",
"start": 0,
"end": 28,
"loc": {
"start": {
"line": 1,
"column": 0
},
"end": {
"line": 3,
"column": 2
}
},
"declarations": [
{
"type": "VariableDeclarator",
"start": 4,
"end": 27,
"loc": {
"start": {
"line": 1,
"column": 4
},
"end": {
"line": 3,
"column": 1
}
},
"id": {
"type": "Identifier",
"start": 4,
"end": 5,
"loc": {
"start": {
"line": 1,
"column": 4
},
"end": {
"line": 1,
"column": 5
},
"identifierName": "a"
},
"name": "a"
},
"init": {
"type": "ObjectExpression",
"start": 8,
"end": 27,
"loc": {
"start": {
"line": 1,
"column": 8
},
"end": {
"line": 3,
"column": 1
}
},
"properties": [
{
"type": "ObjectProperty",
"start": 12,
"end": 25,
"loc": {
"start": {
"line": 2,
"column": 2
},
"end": {
"line": 2,
"column": 15
}
},
"method": false,
"key": {
"type": "Identifier",
"start": 12,
"end": 22,
"loc": {
"start": {
"line": 2,
"column": 2
},
"end": {
"line": 2,
"column": 12
},
"identifierName": "break"
},
"name": "break"
},
"computed": false,
"shorthand": false,
"value": {
"type": "NumericLiteral",
"start": 24,
"end": 25,
"loc": {
"start": {
"line": 2,
"column": 14
},
"end": {
"line": 2,
"column": 15
}
},
"extra": {
"rawValue": 2,
"raw": "2"
},
"value": 2
}
}
]
}
}
],
"kind": "var"
}
],
"directives": []
}
}

442
scripts/tests/test262/test262_whitelist.txt
View File

@ -284,108 +284,6 @@ built-ins/RegExp/property-escapes/unsupported-property-Line_Break.js(default)
built-ins/RegExp/property-escapes/unsupported-property-Line_Break.js(strict mode) built-ins/RegExp/property-escapes/unsupported-property-Line_Break.js(strict mode)
language/expressions/assignment/destructuring/obj-prop-__proto__dup.js(default) language/expressions/assignment/destructuring/obj-prop-__proto__dup.js(default)
language/expressions/assignment/destructuring/obj-prop-__proto__dup.js(strict mode) language/expressions/assignment/destructuring/obj-prop-__proto__dup.js(strict mode)
language/expressions/assignment/dstr/ident-name-prop-name-literal-break-escaped.js(default)
language/expressions/assignment/dstr/ident-name-prop-name-literal-case-escaped.js(default)
language/expressions/assignment/dstr/ident-name-prop-name-literal-catch-escaped.js(default)
language/expressions/assignment/dstr/ident-name-prop-name-literal-class-escaped.js(default)
language/expressions/assignment/dstr/ident-name-prop-name-literal-const-escaped.js(default)
language/expressions/assignment/dstr/ident-name-prop-name-literal-continue-escaped.js(default)
language/expressions/assignment/dstr/ident-name-prop-name-literal-debugger-escaped.js(default)
language/expressions/assignment/dstr/ident-name-prop-name-literal-default-escaped-ext.js(default)
language/expressions/assignment/dstr/ident-name-prop-name-literal-default-escaped.js(default)
language/expressions/assignment/dstr/ident-name-prop-name-literal-delete-escaped.js(default)
language/expressions/assignment/dstr/ident-name-prop-name-literal-do-escaped.js(default)
language/expressions/assignment/dstr/ident-name-prop-name-literal-else-escaped.js(default)
language/expressions/assignment/dstr/ident-name-prop-name-literal-export-escaped.js(default)
language/expressions/assignment/dstr/ident-name-prop-name-literal-extends-escaped-ext.js(default)
language/expressions/assignment/dstr/ident-name-prop-name-literal-extends-escaped.js(default)
language/expressions/assignment/dstr/ident-name-prop-name-literal-finally-escaped.js(default)
language/expressions/assignment/dstr/ident-name-prop-name-literal-for-escaped.js(default)
language/expressions/assignment/dstr/ident-name-prop-name-literal-function-escaped.js(default)
language/expressions/assignment/dstr/ident-name-prop-name-literal-if-escaped.js(default)
language/expressions/assignment/dstr/ident-name-prop-name-literal-import-escaped.js(default)
language/expressions/assignment/dstr/ident-name-prop-name-literal-in-escaped.js(default)
language/expressions/assignment/dstr/ident-name-prop-name-literal-instanceof-escaped.js(default)
language/expressions/assignment/dstr/ident-name-prop-name-literal-new-escaped.js(default)
language/expressions/assignment/dstr/ident-name-prop-name-literal-return-escaped.js(default)
language/expressions/assignment/dstr/ident-name-prop-name-literal-super-escaped.js(default)
language/expressions/assignment/dstr/ident-name-prop-name-literal-switch-escaped.js(default)
language/expressions/assignment/dstr/ident-name-prop-name-literal-this-escaped.js(default)
language/expressions/assignment/dstr/ident-name-prop-name-literal-throw-escaped.js(default)
language/expressions/assignment/dstr/ident-name-prop-name-literal-try-escaped.js(default)
language/expressions/assignment/dstr/ident-name-prop-name-literal-typeof-escaped.js(default)
language/expressions/assignment/dstr/ident-name-prop-name-literal-var-escaped.js(default)
language/expressions/assignment/dstr/ident-name-prop-name-literal-void-escaped.js(default)
language/expressions/assignment/dstr/ident-name-prop-name-literal-while-escaped.js(default)
language/expressions/assignment/dstr/ident-name-prop-name-literal-with-escaped.js(default)
language/expressions/assignment/member-expr-ident-name-break-escaped.js(default)
language/expressions/assignment/member-expr-ident-name-break-escaped.js(strict mode)
language/expressions/assignment/member-expr-ident-name-case-escaped.js(default)
language/expressions/assignment/member-expr-ident-name-case-escaped.js(strict mode)
language/expressions/assignment/member-expr-ident-name-catch-escaped.js(default)
language/expressions/assignment/member-expr-ident-name-catch-escaped.js(strict mode)
language/expressions/assignment/member-expr-ident-name-class-escaped.js(default)
language/expressions/assignment/member-expr-ident-name-class-escaped.js(strict mode)
language/expressions/assignment/member-expr-ident-name-const-escaped.js(default)
language/expressions/assignment/member-expr-ident-name-const-escaped.js(strict mode)
language/expressions/assignment/member-expr-ident-name-continue-escaped.js(default)
language/expressions/assignment/member-expr-ident-name-continue-escaped.js(strict mode)
language/expressions/assignment/member-expr-ident-name-debugger-escaped.js(default)
language/expressions/assignment/member-expr-ident-name-debugger-escaped.js(strict mode)
language/expressions/assignment/member-expr-ident-name-default-escaped-ext.js(default)
language/expressions/assignment/member-expr-ident-name-default-escaped-ext.js(strict mode)
language/expressions/assignment/member-expr-ident-name-default-escaped.js(default)
language/expressions/assignment/member-expr-ident-name-default-escaped.js(strict mode)
language/expressions/assignment/member-expr-ident-name-delete-escaped.js(default)
language/expressions/assignment/member-expr-ident-name-delete-escaped.js(strict mode)
language/expressions/assignment/member-expr-ident-name-do-escaped.js(default)
language/expressions/assignment/member-expr-ident-name-do-escaped.js(strict mode)
language/expressions/assignment/member-expr-ident-name-else-escaped.js(default)
language/expressions/assignment/member-expr-ident-name-else-escaped.js(strict mode)
language/expressions/assignment/member-expr-ident-name-export-escaped.js(default)
language/expressions/assignment/member-expr-ident-name-export-escaped.js(strict mode)
language/expressions/assignment/member-expr-ident-name-extends-escaped-ext.js(default)
language/expressions/assignment/member-expr-ident-name-extends-escaped-ext.js(strict mode)
language/expressions/assignment/member-expr-ident-name-extends-escaped.js(default)
language/expressions/assignment/member-expr-ident-name-extends-escaped.js(strict mode)
language/expressions/assignment/member-expr-ident-name-finally-escaped.js(default)
language/expressions/assignment/member-expr-ident-name-finally-escaped.js(strict mode)
language/expressions/assignment/member-expr-ident-name-for-escaped.js(default)
language/expressions/assignment/member-expr-ident-name-for-escaped.js(strict mode)
language/expressions/assignment/member-expr-ident-name-function-escaped.js(default)
language/expressions/assignment/member-expr-ident-name-function-escaped.js(strict mode)
language/expressions/assignment/member-expr-ident-name-if-escaped.js(default)
language/expressions/assignment/member-expr-ident-name-if-escaped.js(strict mode)
language/expressions/assignment/member-expr-ident-name-import-escaped.js(default)
language/expressions/assignment/member-expr-ident-name-import-escaped.js(strict mode)
language/expressions/assignment/member-expr-ident-name-in-escaped.js(default)
language/expressions/assignment/member-expr-ident-name-in-escaped.js(strict mode)
language/expressions/assignment/member-expr-ident-name-instanceof-escaped.js(default)
language/expressions/assignment/member-expr-ident-name-instanceof-escaped.js(strict mode)
language/expressions/assignment/member-expr-ident-name-new-escaped.js(default)
language/expressions/assignment/member-expr-ident-name-new-escaped.js(strict mode)
language/expressions/assignment/member-expr-ident-name-return-escaped.js(default)
language/expressions/assignment/member-expr-ident-name-return-escaped.js(strict mode)
language/expressions/assignment/member-expr-ident-name-super-escaped.js(default)
language/expressions/assignment/member-expr-ident-name-super-escaped.js(strict mode)
language/expressions/assignment/member-expr-ident-name-switch-escaped.js(default)
language/expressions/assignment/member-expr-ident-name-switch-escaped.js(strict mode)
language/expressions/assignment/member-expr-ident-name-this-escaped.js(default)
language/expressions/assignment/member-expr-ident-name-this-escaped.js(strict mode)
language/expressions/assignment/member-expr-ident-name-throw-escaped.js(default)
language/expressions/assignment/member-expr-ident-name-throw-escaped.js(strict mode)
language/expressions/assignment/member-expr-ident-name-try-escaped.js(default)
language/expressions/assignment/member-expr-ident-name-try-escaped.js(strict mode)
language/expressions/assignment/member-expr-ident-name-typeof-escaped.js(default)
language/expressions/assignment/member-expr-ident-name-typeof-escaped.js(strict mode)
language/expressions/assignment/member-expr-ident-name-var-escaped.js(default)
language/expressions/assignment/member-expr-ident-name-var-escaped.js(strict mode)
language/expressions/assignment/member-expr-ident-name-void-escaped.js(default)
language/expressions/assignment/member-expr-ident-name-void-escaped.js(strict mode)
language/expressions/assignment/member-expr-ident-name-while-escaped.js(default)
language/expressions/assignment/member-expr-ident-name-while-escaped.js(strict mode)
language/expressions/assignment/member-expr-ident-name-with-escaped.js(default)
language/expressions/assignment/member-expr-ident-name-with-escaped.js(strict mode)
language/expressions/async-arrow-function/await-as-param-ident-nested-arrow-parameter-position.js(default) language/expressions/async-arrow-function/await-as-param-ident-nested-arrow-parameter-position.js(default)
language/expressions/async-arrow-function/await-as-param-ident-nested-arrow-parameter-position.js(strict mode) language/expressions/async-arrow-function/await-as-param-ident-nested-arrow-parameter-position.js(strict mode)
language/expressions/async-arrow-function/await-as-param-nested-arrow-parameter-position.js(default) language/expressions/async-arrow-function/await-as-param-nested-arrow-parameter-position.js(default)
@ -490,278 +388,6 @@ language/expressions/class/elements/syntax/early-errors/invalid-names/method-out
language/expressions/class/elements/syntax/early-errors/invalid-names/method-outter-member-expression-this.js(strict mode) language/expressions/class/elements/syntax/early-errors/invalid-names/method-outter-member-expression-this.js(strict mode)
language/expressions/class/elements/syntax/early-errors/super-private-access-invalid.js(default) language/expressions/class/elements/syntax/early-errors/super-private-access-invalid.js(default)
language/expressions/class/elements/syntax/early-errors/super-private-access-invalid.js(strict mode) language/expressions/class/elements/syntax/early-errors/super-private-access-invalid.js(strict mode)
language/expressions/class/ident-name-method-def-break-escaped.js(default)
language/expressions/class/ident-name-method-def-break-escaped.js(strict mode)
language/expressions/class/ident-name-method-def-case-escaped.js(default)
language/expressions/class/ident-name-method-def-case-escaped.js(strict mode)
language/expressions/class/ident-name-method-def-catch-escaped.js(default)
language/expressions/class/ident-name-method-def-catch-escaped.js(strict mode)
language/expressions/class/ident-name-method-def-class-escaped.js(default)
language/expressions/class/ident-name-method-def-class-escaped.js(strict mode)
language/expressions/class/ident-name-method-def-const-escaped.js(default)
language/expressions/class/ident-name-method-def-const-escaped.js(strict mode)
language/expressions/class/ident-name-method-def-continue-escaped.js(default)
language/expressions/class/ident-name-method-def-continue-escaped.js(strict mode)
language/expressions/class/ident-name-method-def-debugger-escaped.js(default)
language/expressions/class/ident-name-method-def-debugger-escaped.js(strict mode)
language/expressions/class/ident-name-method-def-default-escaped-ext.js(default)
language/expressions/class/ident-name-method-def-default-escaped-ext.js(strict mode)
language/expressions/class/ident-name-method-def-default-escaped.js(default)
language/expressions/class/ident-name-method-def-default-escaped.js(strict mode)
language/expressions/class/ident-name-method-def-delete-escaped.js(default)
language/expressions/class/ident-name-method-def-delete-escaped.js(strict mode)
language/expressions/class/ident-name-method-def-do-escaped.js(default)
language/expressions/class/ident-name-method-def-do-escaped.js(strict mode)
language/expressions/class/ident-name-method-def-else-escaped.js(default)
language/expressions/class/ident-name-method-def-else-escaped.js(strict mode)
language/expressions/class/ident-name-method-def-export-escaped.js(default)
language/expressions/class/ident-name-method-def-export-escaped.js(strict mode)
language/expressions/class/ident-name-method-def-extends-escaped-ext.js(default)
language/expressions/class/ident-name-method-def-extends-escaped-ext.js(strict mode)
language/expressions/class/ident-name-method-def-extends-escaped.js(default)
language/expressions/class/ident-name-method-def-extends-escaped.js(strict mode)
language/expressions/class/ident-name-method-def-finally-escaped.js(default)
language/expressions/class/ident-name-method-def-finally-escaped.js(strict mode)
language/expressions/class/ident-name-method-def-for-escaped.js(default)
language/expressions/class/ident-name-method-def-for-escaped.js(strict mode)
language/expressions/class/ident-name-method-def-function-escaped.js(default)
language/expressions/class/ident-name-method-def-function-escaped.js(strict mode)
language/expressions/class/ident-name-method-def-if-escaped.js(default)
language/expressions/class/ident-name-method-def-if-escaped.js(strict mode)
language/expressions/class/ident-name-method-def-import-escaped.js(default)
language/expressions/class/ident-name-method-def-import-escaped.js(strict mode)
language/expressions/class/ident-name-method-def-in-escaped.js(default)
language/expressions/class/ident-name-method-def-in-escaped.js(strict mode)
language/expressions/class/ident-name-method-def-instanceof-escaped.js(default)
language/expressions/class/ident-name-method-def-instanceof-escaped.js(strict mode)
language/expressions/class/ident-name-method-def-new-escaped.js(default)
language/expressions/class/ident-name-method-def-new-escaped.js(strict mode)
language/expressions/class/ident-name-method-def-return-escaped.js(default)
language/expressions/class/ident-name-method-def-return-escaped.js(strict mode)
language/expressions/class/ident-name-method-def-super-escaped.js(default)
language/expressions/class/ident-name-method-def-super-escaped.js(strict mode)
language/expressions/class/ident-name-method-def-switch-escaped.js(default)
language/expressions/class/ident-name-method-def-switch-escaped.js(strict mode)
language/expressions/class/ident-name-method-def-this-escaped.js(default)
language/expressions/class/ident-name-method-def-this-escaped.js(strict mode)
language/expressions/class/ident-name-method-def-throw-escaped.js(default)
language/expressions/class/ident-name-method-def-throw-escaped.js(strict mode)
language/expressions/class/ident-name-method-def-try-escaped.js(default)
language/expressions/class/ident-name-method-def-try-escaped.js(strict mode)
language/expressions/class/ident-name-method-def-typeof-escaped.js(default)
language/expressions/class/ident-name-method-def-typeof-escaped.js(strict mode)
language/expressions/class/ident-name-method-def-var-escaped.js(default)
language/expressions/class/ident-name-method-def-var-escaped.js(strict mode)
language/expressions/class/ident-name-method-def-void-escaped.js(default)
language/expressions/class/ident-name-method-def-void-escaped.js(strict mode)
language/expressions/class/ident-name-method-def-while-escaped.js(default)
language/expressions/class/ident-name-method-def-while-escaped.js(strict mode)
language/expressions/class/ident-name-method-def-with-escaped.js(default)
language/expressions/class/ident-name-method-def-with-escaped.js(strict mode)
language/expressions/object/covered-ident-name-prop-name-literal-break-escaped.js(default)
language/expressions/object/covered-ident-name-prop-name-literal-break-escaped.js(strict mode)
language/expressions/object/covered-ident-name-prop-name-literal-case-escaped.js(default)
language/expressions/object/covered-ident-name-prop-name-literal-case-escaped.js(strict mode)
language/expressions/object/covered-ident-name-prop-name-literal-catch-escaped.js(default)
language/expressions/object/covered-ident-name-prop-name-literal-catch-escaped.js(strict mode)
language/expressions/object/covered-ident-name-prop-name-literal-class-escaped.js(default)
language/expressions/object/covered-ident-name-prop-name-literal-class-escaped.js(strict mode)
language/expressions/object/covered-ident-name-prop-name-literal-const-escaped.js(default)
language/expressions/object/covered-ident-name-prop-name-literal-const-escaped.js(strict mode)
language/expressions/object/covered-ident-name-prop-name-literal-continue-escaped.js(default)
language/expressions/object/covered-ident-name-prop-name-literal-continue-escaped.js(strict mode)
language/expressions/object/covered-ident-name-prop-name-literal-debugger-escaped.js(default)
language/expressions/object/covered-ident-name-prop-name-literal-debugger-escaped.js(strict mode)
language/expressions/object/covered-ident-name-prop-name-literal-default-escaped-ext.js(default)
language/expressions/object/covered-ident-name-prop-name-literal-default-escaped-ext.js(strict mode)
language/expressions/object/covered-ident-name-prop-name-literal-default-escaped.js(default)
language/expressions/object/covered-ident-name-prop-name-literal-default-escaped.js(strict mode)
language/expressions/object/covered-ident-name-prop-name-literal-delete-escaped.js(default)
language/expressions/object/covered-ident-name-prop-name-literal-delete-escaped.js(strict mode)
language/expressions/object/covered-ident-name-prop-name-literal-do-escaped.js(default)
language/expressions/object/covered-ident-name-prop-name-literal-do-escaped.js(strict mode)
language/expressions/object/covered-ident-name-prop-name-literal-else-escaped.js(default)
language/expressions/object/covered-ident-name-prop-name-literal-else-escaped.js(strict mode)
language/expressions/object/covered-ident-name-prop-name-literal-export-escaped.js(default)
language/expressions/object/covered-ident-name-prop-name-literal-export-escaped.js(strict mode)
language/expressions/object/covered-ident-name-prop-name-literal-extends-escaped-ext.js(default)
language/expressions/object/covered-ident-name-prop-name-literal-extends-escaped-ext.js(strict mode)
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