10 lines
403 B
TypeScript
10 lines
403 B
TypeScript
export type DeepReadonly<T> = T extends any[] ? DeepReadonlyArray<T[number]> : T extends object ? DeepReadonlyObject<T> : T;
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type NonFunctionPropertyNames<T> = { [K in keyof T]: T[K] extends Function ? never : K }[keyof T];
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interface DeepReadonlyArray<T> extends ReadonlyArray<DeepReadonly<T>> {}
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type DeepReadonlyObject<T> = {
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readonly [P in NonFunctionPropertyNames<T>]: DeepReadonly<T[P]>;
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};
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