TypeScript/tests/cases/compiler/conditionalTypeContextualTypeSimplificationsSuceeds.ts
Wesley Wigham 4eb59a2d77
Fixing react defaultize+generic default props interaction (#27088)
* Add repro for fixed issue

* Fix JSX propagating flags and contextual types

* Accept slightly changed baselines

* Add modern react.d.ts and regression test
2018-09-14 14:18:47 -07:00

16 lines
556 B
TypeScript

// @strict: true
// repro from https://github.com/Microsoft/TypeScript/issues/26395
interface Props {
when: (value: string) => boolean;
}
function bad<P extends Props>(
attrs: string extends keyof P ? { [K in keyof P]: P[K] } : { [K in keyof P]: P[K] }) { }
function good1<P extends Props>(
attrs: string extends keyof P ? P : { [K in keyof P]: P[K] }) { }
function good2<P extends Props>(
attrs: { [K in keyof P]: P[K] }) { }
bad({ when: value => false });
good1({ when: value => false });
good2({ when: value => false });