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type A<T> = T extends Promise<infer U> ? A<U> : T;
type B<T extends Promise<any>> = T extends Promise<infer U> ? A<T> : never
提出日時2024-10-28 06:50:34
問題Awaited
ユーザーbalckowl
ステータスWrong Answer
テストケース
import type { Equal, Expect } from '@type-challenges/utils'

type X = Promise<string>
type Y = Promise<{ field: number }>
type Z = Promise<Promise<string | number>>

type cases = [
  Expect<Equal<MyAwaited<X>, string>>,
  Expect<Equal<MyAwaited<Y>, { field: number }>>,
  Expect<Equal<MyAwaited<Z>, string | number>>,
]

// @ts-expect-error
type error = MyAwaited<number>