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build(projects): 引入TS高级类型库

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Soybean
2022-08-24 19:21:22 +08:00
parent 639c4458be
commit 71a753f323
2 changed files with 11 additions and 0 deletions
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10
src/typings/utils.d.ts vendored
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@ -10,4 +10,14 @@ declare namespace TypeUtil {
type FirstOfArray<T extends any[]> = T extends [infer First, ...infer _Rest] ? First : never;
type LastOfArray<T extends any[]> = T extends [...infer _Rest, infer Last] ? Last : never;
// union to tuple
type Union2IntersectionFn<T> = (T extends unknown ? (k: () => T) => void : never) extends (k: infer R) => void
? R
: never;
type GetUnionLast<U> = Union2IntersectionFn<U> extends () => infer I ? I : never;
type UnionToTuple<T, R extends any[] = []> = [T] extends [never]
? R
: UnionToTuple<Exclude<T, GetUnionLast<T>>, [GetUnionLast<T>, ...R]>;
}