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Fix array destructuring elision parsing in TS arrow functions (#13641)

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Nicolò Ribaudo 2021-08-05 21:47:30 +02:00 committed by GitHub
parent bdc75dce72
commit f9dcc4e4bb
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3 changed files with 60 additions and 1 deletions
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4
packages/babel-parser/src/parser/lval.js
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@ -257,7 +257,9 @@ export default class LValParser extends NodeUtils {
return this.isAssignable(node.argument);
case "ArrayExpression":
return node.elements.every(element => this.isAssignable(element));
return node.elements.every(
element => element === null || this.isAssignable(element),
);
case "AssignmentExpression":
return node.operator === "=";

1
packages/babel-parser/test/fixtures/typescript/regression/elision-arrow-destructuring-13636/input.ts vendored Normal file
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@ -0,0 +1 @@
([, a]): b => c;

56
packages/babel-parser/test/fixtures/typescript/regression/elision-arrow-destructuring-13636/output.json vendored Normal file
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@ -0,0 +1,56 @@
{
"type": "File",
"start":0,"end":16,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":16}},
"program": {
"type": "Program",
"start":0,"end":16,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":16}},
"sourceType": "module",
"interpreter": null,
"body": [
{
"type": "ExpressionStatement",
"start":0,"end":16,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":16}},
"expression": {
"type": "ArrowFunctionExpression",
"start":0,"end":15,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":15}},
"returnType": {
"type": "TSTypeAnnotation",
"start":7,"end":10,"loc":{"start":{"line":1,"column":7},"end":{"line":1,"column":10}},
"typeAnnotation": {
"type": "TSTypeReference",
"start":9,"end":10,"loc":{"start":{"line":1,"column":9},"end":{"line":1,"column":10}},
"typeName": {
"type": "Identifier",
"start":9,"end":10,"loc":{"start":{"line":1,"column":9},"end":{"line":1,"column":10},"identifierName":"b"},
"name": "b"
}
}
},
"id": null,
"generator": false,
"async": false,
"params": [
{
"type": "ArrayPattern",
"start":1,"end":6,"loc":{"start":{"line":1,"column":1},"end":{"line":1,"column":6}},
"elements": [
null,
{
"type": "Identifier",
"start":4,"end":5,"loc":{"start":{"line":1,"column":4},"end":{"line":1,"column":5},"identifierName":"a"},
"name": "a"
}
]
}
],
"body": {
"type": "Identifier",
"start":14,"end":15,"loc":{"start":{"line":1,"column":14},"end":{"line":1,"column":15},"identifierName":"c"},
"name": "c"
}
}
}
],
"directives": []
}
}