TypeScript/tests/cases/compiler/genericFunctionInference2.ts
2019-04-16 10:00:49 -07:00

31 lines
855 B
TypeScript

// Repro from #30685
type Reducer<S> = (state: S) => S;
declare function combineReducers<S>(reducers: { [K in keyof S]: Reducer<S[K]> }): Reducer<S>;
type MyState = { combined: { foo: number } };
declare const foo: Reducer<MyState['combined']['foo']>;
const myReducer1: Reducer<MyState> = combineReducers({
combined: combineReducers({ foo }),
});
const myReducer2 = combineReducers({
combined: combineReducers({ foo }),
});
// Repro from #30942
declare function withH<T, U>(handlerCreators: HandleCreatorsFactory<T, U>): U;
type Props = { out: number }
type HandleCreatorsFactory<T, U> = (initialProps: T) => { [P in keyof U]: (props: T) => U[P] };
const enhancer4 = withH((props: Props) => ({
onChange: (props) => (e: any) => {},
onSubmit: (props) => (e: any) => {},
}));
enhancer4.onChange(null);