Type Alias UndefinedOnPartialList<T>

UndefinedOnPartialList: T extends []
    ? []
    : T extends [infer F, ...(infer R)]
        ? [UndefinedOnPartialDeep<F>, ...UndefinedOnPartialDeep<R>]
        : T extends readonly [infer F, ...(infer R)]
            ? readonly [UndefinedOnPartialDeep<F>, ...UndefinedOnPartialDeep<R>]
            : T extends (infer F)[]
                ? UndefinedOnPartialDeep<F>[]
                : T extends ReadonlyArray<infer F>
                    ? ReadonlyArray<UndefinedOnPartialDeep<F>>
                    : never