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  1. #include <iostream>
  2. #include <functional>
  3.  
  4. 	class DoAction
  5. 		{
  6. 	public:
  7. 		DoAction (std::function<void ()> func) : m_func (func)
  8. 			{
  9. 			}
  10. 		~DoAction ()
  11. 			{
  12. 			m_func ();
  13. 			}
  14.  
  15. 	private:
  16. 		std::function<void ()> m_func;
  17. 		};
  18.  
  19. 	int main()
  20. 		{
  21. 		int a = 5;
  22. 			{
  23. 			std::cout << a << '\n';
  24. 			DoAction action([&] {a++;});
  25. 			std::cout << a << '\n';
  26. 			}
  27. 		std::cout << a << '\n';
  28. 		return 0;
  29. 		}
Success #stdin #stdout 0s 3468KB
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stdin
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Standard input is empty
stdout
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5
5
6
https://ideone.com/nRvPgb
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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