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Add regression test

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This commit is contained in:
Anders Hejlsberg
2018-12-18 11:58:06 -08:00
parent 67491414f1
commit 519c501ea5
1 changed files with 7 additions and 0 deletions
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7
tests/cases/conformance/types/literal/literalTypeWidening.ts
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@@ -127,3 +127,10 @@ export type LangCode = keyof typeof langCodeSet
export const langCodes = keys(langCodeSet)
const arr: Obj[] = langCodes.map(code => ({ code }))
// Repro from #29081
function test<T extends { a: string, b: string }>(obj: T): T {
let { a, ...rest } = obj;
return { a: 'hello', ...rest } as T;
}