#ifndef UNIQUE_PTR_GUARD
#define UNIQUE_PTR_GUARD
#include <algorithm>

namespace ptrs::unique {
template <typename T>
struct default_deleter {
    void operator()(T *ptr) {
        delete ptr;
    }
};

template <typename T, typename Deleter = struct default_deleter<T>>
struct unique_ptr {
private:
    T *ptr_on_object;
    Deleter my_deleter;
    void delete_data() {
        if (ptr_on_object != nullptr) {
            my_deleter(ptr_on_object);
        }
    }

public:
    explicit unique_ptr(T *cur_ptr, const Deleter &tmp)
        : ptr_on_object(std::exchange(cur_ptr, nullptr)),
          my_deleter(tmp) {  // solve problem with rvalue and lvalue Deleters
    }

    explicit unique_ptr(T *cur_ptr, Deleter &&tmp)
        : ptr_on_object(std::exchange(cur_ptr, nullptr)),
          my_deleter(std::move(tmp)) {
    }

    unique_ptr() : ptr_on_object(nullptr) {
    }