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Tuple to Union

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type TupleToUnion<T extends ReadonlyArray<any>> = T extends [infer F, ...infer Rest] ? F | TupleToUnion<Rest> : never
提出日時2023-04-30 01:37:34
問題Tuple to Union
ユーザーDowanna
ステータスAccepted
テストケース
import type { Equal, Expect } from '@type-challenges/utils'

type cases = [
  Expect<Equal<TupleToUnion<[123, '456', true]>, 123 | '456' | true>>,
  Expect<Equal<TupleToUnion<[123]>, 123>>,
]