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Flip Arguments

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type ReverseTpl<T extends unknown[]> = T extends [infer E, ...infer R] ? [...ReverseTpl<R>, E] : []
type FlipArguments<T extends (...args: never[]) => unknown> = (...args: ReverseTpl<Parameters<T>>) => ReturnType<T>
提出日時2023-09-02 16:15:29
問題Flip Arguments
ユーザーookkoouu
ステータスAccepted
テストケース
import type { Equal, Expect } from '@type-challenges/utils'

type cases = [
  Expect<Equal<FlipArguments<() => boolean>, () => boolean>>,
  Expect<Equal<FlipArguments<(foo: string) => number>, (foo: string) => number>>,
  Expect<Equal<FlipArguments<(arg0: string, arg1: number, arg2: boolean) => void>, (arg0: boolean, arg1: number, arg2: string) => void>>,
]