gistfile1.c++

#include <iostream>

using namespace std;

class A
{
protected:
public:
	int count;
	
	A() : count(1) {
		
	};
	
	void release()
	{		
		count--;
		if (count == 0) {
			cout << "COUNT == 0" << endl;
			delete this;
		}
	}

	virtual ~A() { cout << "~A" << endl; }

	void operator delete(void* ptr, size_t s)
	{
		cout << "A" << endl;
	}
};

class B : public A
{
public:
	
	virtual ~B() { cout << "~B" << endl; }
	
	void operator delete(void* ptr, size_t s)
	{
		cout << "B" << endl;
	}
};

template<typename T>
class C : public B
{
public:
	virtual ~C() { cout << "~C" << endl; }
	
	void operator delete(void* ptr, size_t s)
	{		
		A* a = (A *) ptr;
		if (a->count == 0) {
			cout << "C" << sizeof(T) << endl;
		} else {
			cout << "releasing" << endl;
			a->release();
		}
	}
};

int main()
{
	C<int>* b = new C<int>;
	b->release();
}