Marc Mintel
5397309103
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8 lines
1.2 KiB
Plaintext
8 lines
1.2 KiB
Plaintext
import { Builtin } from "../built-in";
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import { IsTuple } from "../is-tuple";
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export type DeepUndefinable<Type> = Type extends Builtin ? Type | undefined : Type extends Map<infer Keys, infer Values> ? Map<DeepUndefinable<Keys>, DeepUndefinable<Values>> : Type extends ReadonlyMap<infer Keys, infer Values> ? ReadonlyMap<DeepUndefinable<Keys>, DeepUndefinable<Values>> : Type extends WeakMap<infer Keys, infer Values> ? DeepUndefinable<Keys> extends object ? WeakMap<DeepUndefinable<Keys>, DeepUndefinable<Values>> : never : Type extends Set<infer Values> ? Set<DeepUndefinable<Values>> : Type extends ReadonlySet<infer Values> ? ReadonlySet<DeepUndefinable<Values>> : Type extends WeakSet<infer Values> ? DeepUndefinable<Values> extends object ? WeakSet<DeepUndefinable<Values>> : never : Type extends ReadonlyArray<infer Values> ? Type extends IsTuple<Type> ? {
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[Key in keyof Type]: DeepUndefinable<Type[Key]> | undefined;
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} : Type extends Array<Values> ? Array<DeepUndefinable<Values>> : ReadonlyArray<DeepUndefinable<Values>> : Type extends Promise<infer Value> ? Promise<DeepUndefinable<Value>> : Type extends {} ? {
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[Key in keyof Type]: DeepUndefinable<Type[Key]>;
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} : Type | undefined;
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