namespace ptrs::unique {
struct default_deleter {
    void operator()(T* ptr) {
        std::cout << "OK";
        ptr = nullptr;
        delete this;
    }
};
template <typename T, typename Deleter = struct default_deleter>
struct unique_ptr {
//    struct default_deleter {
//        void operator()(T* ptr) {
//            std::cout << "OK";
//            ptr = nullptr;
//            delete this;
//        }
//    };
private:
    T *main_ptr;
    Deleter main_del;

public:
    unique_ptr(T *cur_ptr, Deleter tmp) : main_ptr(cur_ptr), main_del(std::move(tmp)){

    }