Type Alias Box<T, Options>

Box: IsFunction<T, IsFunction.$Branch> extends infer R
    ? R extends $Then
        ? Function
        : IsObject<T, IsObject.$Branch<{ exact: true }>> extends infer R
            ? R extends $Then
                ? Object
                : T extends Record<any, any>
                    ? T
                    : IsBoolean<T, $Selection.Branch> extends infer R
                        ? R extends $Then
                            ? Boolean
                            : R extends $Else
                                ? IsNumber<T, IsNumber.$Branch> extends infer R
                                    ? R extends $Then ? Number : (...) extends (...) ? (...) : (...)
                                    : never
                                : never
                        : never
            : never
    : never

Box<number> // Number
Box<object> // Object
Box<string>  // String
Box<'abc'>  // String

Box<undefined> // never
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