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fix: start TypePredicate node after returnToken (#12678)

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This commit is contained in:
Huáng Jùnliàng
2021-01-23 12:06:54 -05:00
committed by GitHub
parent 8c03fb0152
commit 568679e301
10 changed files with 20 additions and 21 deletions
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5
packages/babel-parser/src/plugins/typescript/index.js
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@@ -1050,6 +1050,8 @@ export default (superClass: Class<Parser>): Class<Parser> =>
const t: N.TsTypeAnnotation = this.startNode();
this.expect(returnToken);
const node = this.startNode<N.TsTypePredicate>();
const asserts = !!this.tsTryParse(
this.tsParseTypePredicateAsserts.bind(this),
);
@@ -1061,7 +1063,6 @@ export default (superClass: Class<Parser>): Class<Parser> =>
// if it turns out to be a `TSThisType`, wrap it with `TSTypePredicate`
// : asserts this
if (thisTypePredicate.type === "TSThisType") {
const node: N.TsTypePredicate = this.startNodeAtNode(t);
node.parameterName = (thisTypePredicate: N.TsThisType);
node.asserts = true;
thisTypePredicate = this.finishNode(node, "TSTypePredicate");
@@ -1082,7 +1083,6 @@ export default (superClass: Class<Parser>): Class<Parser> =>
return this.tsParseTypeAnnotation(/* eatColon */ false, t);
}
const node: N.TsTypePredicate = this.startNodeAtNode(t);
// : asserts foo
node.parameterName = this.parseIdentifier();
node.asserts = asserts;
@@ -1092,7 +1092,6 @@ export default (superClass: Class<Parser>): Class<Parser> =>
// : asserts foo is type
const type = this.tsParseTypeAnnotation(/* eatColon */ false);
const node = this.startNodeAtNode(t);
node.parameterName = typePredicateVariable;
node.typeAnnotation = type;
node.asserts = asserts;