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  1. #include <iostream>
  2. #include <functional>
  3. using namespace std;
  4.  
  5. class Functor : public std::function<bool()> {
  6. public:
  7. 	virtual ~Functor() {};
  8. 	virtual bool operator()() const {return false;};
  9. };
  10.  
  11. class FunctorTrue : public Functor{
  12. public:
  13. 	bool operator()() const {return true;}
  14. };
  15.  
  16. class Dispatcher {
  17. public:
  18. 	const Functor & mFunctor; 
  19. 	Dispatcher(const Functor & functor): mFunctor(functor) {}
  20. 	Dispatcher(const Functor && functor): mFunctor(functor) {
  21. 	}
  22.  
  23. 	void dispatch(){
  24. 		cout << boolalpha << mFunctor() << endl;
  25. 	}
  26. };
  27.  
  28. int main() {
  29. 	Dispatcher dt = Dispatcher(FunctorTrue());
  30. 	dt.dispatch();
  31. }
Success #stdin #stdout 0s 16064KB
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Standard input is empty
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https://ideone.com/vNHr1F
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
secret

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