IsNever
提出詳細
type IsNever<T> = [T] extends [never] ? true : false
| 提出日時 | 2024-10-30 00:54:39 | 
|---|---|
| 問題 | IsNever | 
| ユーザー | balckowl | 
| ステータス | Accepted | 
import type { Equal, Expect } from '@type-challenges/utils' type cases = [ Expect<Equal<IsNever<never>, true>>, Expect<Equal<IsNever<never | string>, false>>, Expect<Equal<IsNever<''>, false>>, Expect<Equal<IsNever<undefined>, false>>, Expect<Equal<IsNever<null>, false>>, Expect<Equal<IsNever<[]>, false>>, Expect<Equal<IsNever<{}>, false>>, ]