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feat: nullable #2341

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+11 −13
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feat: nullable #2341

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24 changes: 11 additions & 13 deletions lib/types/json-schema.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -172,16 +172,14 @@ export type RequiredMembers<T> = StrictNullChecksWrapper<
UncheckedRequiredMembers<T>
>

type Nullable<T> = undefined extends T
? {
nullable: true
const?: null // any non-null value would fail `const: null`, `null` would fail any other value in const
enum?: Readonly<(T | null)[]> // `null` must be explicitly included in "enum" for `null` to pass
default?: T | null
}
: {
nullable?: false
const?: T
enum?: Readonly<T[]>
default?: T
}
type Nullable<T> = {
nullable: true
const?: null // any non-null value would fail `const: null`, `null` would fail any other value in const
enum?: Readonly<(T | null)[]> // `null` must be explicitly included in "enum" for `null` to pass
default?: T | null
} | {
nullable?: false
const?: T
enum?: Readonly<T[]>
default?: T
}
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