template <typename T>
class unique_ptr {
	private:
		T* _p;

	public:
		unique_ptr () = default;

		unique_ptr (T* p) :
			_p(p)
			{}

		~unique_ptr() {
			delete _p;
		}

		unique_ptr& operator = (unique_ptr&& rhs) {
			if (rhs._p != nullptr) {
				_p = rhs._p->clone();
			}
		}

		unique_ptr (const unique_ptr&) = delete;
		unique_ptr operator = (const unique_ptr&) = delete;
}