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  1. #include <iostream>
  2.  
  3. template<typename functor>
  4. struct finalizer
  5. {
  6. 	finalizer(functor f) : f_(f) {}
  7. 	~finalizer() {
  8. 		f_();
  9. 	}
  10.  
  11. 	functor f_;
  12. };
  13.  
  14. template<typename functor>
  15. finalizer<functor> finally(functor&& f)
  16. {
  17. 	return finalizer<functor>(f);
  18. }
  19.  
  20. int main()
  21. {
  22. 	int a = 0;
  23. 	{
  24. 		auto scope_exit = finally([&](){
  25. 			a++;
  26. 		});
  27. 		std::cout << a << std::endl;
  28. 	}
  29. 	std::cout << a << std::endl;
  30. }
Success #stdin #stdout 0s 2884KB
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https://ideone.com/kwmzJ
language:
C++14 (gcc 8.3)
created:
12 years ago
visibility:
public

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