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Fix 'co' for strict generators (#35937)

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Ron Buckton 2019-06-04 11:02:36 -07:00 committed by Andrew Casey
parent 18b549ebcd
commit fb623cb9bb
1 changed files with 6 additions and 1 deletions
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7
types/co/index.d.ts vendored
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@ -4,7 +4,12 @@
// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
// TypeScript Version: 3.1
type ExtractType<T> = T extends IterableIterator<infer R> ? R : never;
type ExtractType<T> =
T extends { [Symbol.iterator](): { next(): { done: true, value: infer U } } } ? U :
T extends { [Symbol.iterator](): { next(): { done: false } } } ? never :
T extends { [Symbol.iterator](): { next(): { value: infer U } } } ? U :
T extends { [Symbol.iterator](): any } ? unknown :
never;
interface Co {
<F extends (...args: any[]) => Iterator<any>>(fn: F, ...args: Parameters<F>): Promise<ExtractType<ReturnType<F>>>;