#include <iostream>
#include <functional>
using namespace std;
 
#define def_unnamed_imp(x, y) unnamed_##x##_##y
#define def_unnamed_decl(X, Y) def_unnamed_imp(X, Y)
#define UNNAMED def_unnamed_decl(__COUNTER__, __LINE__)
 
class call_at_delete
{
	std::function<void()> m_functor;
public:
	template<class Functor>
	call_at_delete(const Functor& _func) : m_functor(_func){}
	~call_at_delete(){m_functor();}
};
 
#define finally call_at_delete UNNAMED = [&]()
 
 
void test()
{
	int i = 10;
 
	finally
	{
		cout << i << " hello\n";
	};
	try
	{
		i = 100;
		throw exception();
	}
	catch(...)
	{
		cout << "exeption\n";
	}
 
}
 
 
 
int main()
{
	test();
 
 
	return 0;
}

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