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hrdtbs/tuplify-union.ts

Created February 25, 2021 02:09
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tuplify-union.ts
type UnionToIntersection<U> = (U extends any ? (k: U) => void : never) extends (k: infer I) => void ? I : never
type LastOf<T> = UnionToIntersection<T extends any ? () => T : never> extends () => infer R ? R : never
type Tuplify<Union, Flag = [Union] extends [never] ? true : false, Last = LastOf<Union>> = true extends Flag
? []
: [...Tuplify<Exclude<Union, Last>>, Last]
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