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  1. #include <iostream>
  2. #include <functional>
  3.  
  4. using namespace std::placeholders;
  5.  
  6. class DelegateToFunctionEnd {
  7.  
  8.     typedef std::function<void(void)> EndFunction; 
  9.  
  10.     public: 
  11.     DelegateToFunctionEnd(EndFunction endFunction) :
  12.         callAtEnd(endFunction)
  13.     { }
  14.  
  15.     ~DelegateToFunctionEnd() {
  16.     	callAtEnd();
  17.     }
  18.  
  19.     private: 
  20.  
  21.     EndFunction callAtEnd;
  22. };
  23.  
  24. class Results {
  25.  
  26. 	public:
  27.  
  28. 	void setStatus(int i) {
  29. 		status = i;
  30. 	}
  31.  
  32. 	int status;
  33. };
  34.  
  35.  
  36. int function(Results &res) {
  37. 	int error;
  38. 	DelegateToFunctionEnd del(std::bind(&Results::setStatus, &res, std::cref(error)));
  39. 	// Some operations
  40.             error = -10;
  41. 	if (error < 0) {
  42. 		return 0;
  43. 	}
  44.  
  45. }
  46.  
  47. int main() {
  48.  
  49. 	Results r;
  50. 	function(r);
  51.  
  52. 	std::cout << r.status;
  53.  
  54. 	// your code goes here
  55. 	return 0;
  56. }
Success #stdin #stdout 0s 4532KB
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Standard input is empty
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-10
https://ideone.com/ZbwyCW
language:
C++ (gcc 8.3)
created:
7 years ago
visibility:
public

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