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  1. #include <functional>
  2. #include <iostream>
  3.  
  4. class Tracker
  5. {
  6. public:
  7.     Tracker() : _methodCalled(false) {}
  8.  
  9.     void MethodToCall()
  10.     {
  11.         std::cout << "Method called\n";
  12.     	_methodCalled = true;
  13.     }
  14.  
  15.     bool GetMethodCalled() const
  16.     {
  17.         return _methodCalled;
  18.     }
  19.  
  20. private:
  21.     bool _methodCalled;
  22. };
  23.  
  24. int main()
  25. {
  26.     Tracker trackerToCopy;
  27.     auto boundToCopy = std::bind(&Tracker::MethodToCall, trackerToCopy);
  28.  
  29.     std::cout << "Bound to copy of tracker\n\t";
  30.     boundToCopy();
  31.     std::cout << "\t_methodCalled value: " << (trackerToCopy.GetMethodCalled() ? "true" : "false") << std::endl;
  32.  
  33.     Tracker trackerLocalInstance;
  34.     auto boundToLocalInstance = std::bind(&Tracker::MethodToCall, &trackerLocalInstance);
  35.  
  36.     std::cout << "Bound to local instance of tracker\n\t";
  37.     boundToLocalInstance();
  38.     std::cout << "\t_methodCalled value: " << (trackerLocalInstance.GetMethodCalled() ? "true" : "false") << std::endl;
  39.  
  40.     Tracker trackerReference;
  41.     auto boundToReference = std::bind(&Tracker::MethodToCall, std::ref(trackerReference));
  42.  
  43.     std::cout << "Bound to refrence to tracker\n\t";
  44.     boundToReference();
  45.     std::cout << "\t_methodCalled value: " << (trackerReference.GetMethodCalled() ? "true" : "false") << std::endl;
  46.  
  47.     return 0;
  48. }
Success #stdin #stdout 0s 2896KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
Bound to copy of tracker
	Method called
	_methodCalled value: false
Bound to local instance of tracker
	Method called
	_methodCalled value: true
Bound to refrence to tracker
	Method called
	_methodCalled value: true
https://ideone.com/jQ6XBK
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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