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Allow tuple rest trailing comma (#10800)

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YeonJuan 2019-12-04 02:32:36 +09:00 committed by Nicolò Ribaudo
parent e74efd2c0a
commit d18afbd7c3
3 changed files with 185 additions and 1 deletions
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7
packages/babel-parser/src/plugins/typescript/index.js
View File

@ -618,7 +618,12 @@ export default (superClass: Class<Parser>): Class<Parser> =>
const restNode: N.TsRestType = this.startNode(); const restNode: N.TsRestType = this.startNode();
this.next(); // skips ellipsis this.next(); // skips ellipsis
restNode.typeAnnotation = this.tsParseType(); restNode.typeAnnotation = this.tsParseType();
this.checkCommaAfterRest(charCodes.rightSquareBracket); if (
this.match(tt.comma) &&
this.lookaheadCharCode() !== charCodes.rightSquareBracket
) {
this.raiseRestNotLast(this.state.start);
}
return this.finishNode(restNode, "TSRestType"); return this.finishNode(restNode, "TSRestType");
} }

1
packages/babel-parser/test/fixtures/typescript/types/tuple-rest-trailing-comma/input.ts vendored Normal file
View File

@ -0,0 +1 @@
let x: [string, ...string[],]

178
packages/babel-parser/test/fixtures/typescript/types/tuple-rest-trailing-comma/output.json vendored Normal file
View File

@ -0,0 +1,178 @@
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},
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}
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{
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},
"end": {
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},
"identifierName": "x"
},
"name": "x",
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"type": "TSTypeAnnotation",
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"column": 5
},
"end": {
"line": 1,
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}
},
"typeAnnotation": {
"type": "TSTupleType",
"start": 7,
"end": 29,
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},
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},
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"line": 1,
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}
}
},
{
"type": "TSRestType",
"start": 16,
"end": 27,
"loc": {
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"line": 1,
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},
"end": {
"line": 1,
"column": 27
}
},
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},
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}
},
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}
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}
}
}
]
}
}
},
"init": null
}
],
"kind": "let"
}
],
"directives": []
}
}