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Fix regression in name resolution in parameter (#38351)

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Ron Buckton 2020-05-06 12:04:28 -07:00 committed by GitHub
parent ec93a7cf7b
commit 4b08c0582d
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GPG key ID: 4AEE18F83AFDEB23
2 changed files with 16 additions and 1 deletions
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4
src/compiler/checker.ts
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@ -1889,7 +1889,9 @@ namespace ts {
lastLocation === (location as BindingElement).name && isBindingPattern(lastLocation))) {
const root = getRootDeclaration(location);
if (root.kind === SyntaxKind.Parameter) {
associatedDeclarationForContainingInitializerOrBindingName = location as BindingElement;
if (!associatedDeclarationForContainingInitializerOrBindingName) {
associatedDeclarationForContainingInitializerOrBindingName = location as BindingElement;
}
}
}
break;

13
tests/cases/conformance/functions/parameterInitializersBackwardReferencing.ts Normal file
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@ -0,0 +1,13 @@
// @target: es5, es2015, esnext
// @noEmit: true
// @noTypesAndSymbols: true
// https://github.com/microsoft/TypeScript/issues/38243
function test0({ a = 0, b = a } = {}) {
return { a, b };
}
function test1({ c: { a = 0, b = a } = {} } = {}) {
return { a, b };
}