#include <iostream>
#include <memory>
 
class Interface
{
	public:
		virtual ~Interface()
		{
			std::cout << __func__ << std::endl;
		}
		virtual void Do() = 0;
};
 
class Real : public Interface
{
public:
	void Do() final
	{
		std::cout << "DO" << std::endl;
	}
 
	~Real()
	{
		std::cout << __func__ << std::endl;
	}
};
 
int main() {
 
	std::unique_ptr<Interface> ptr;
 
	Real* realPtr = new Real();
	ptr = std::unique_ptr<Interface>(realPtr);
 
	ptr.reset(new Real());
 
	return 0;
}

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