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  1. #include <functional>
  2.  
  3. using namespace std;
  4.  
  5. template<typename T>
  6. struct memfun_type
  7. {
  8.     using type = void;
  9. };
  10.  
  11. template<typename Ret, typename Class, typename... Args>
  12. struct memfun_type<Ret(Class::*)(Args...) const>
  13. {
  14.     using type = std::function<Ret(Args...)>;
  15. };
  16.  
  17. template<typename F>
  18. typename memfun_type<decltype(&F::operator())>::type
  19. FFL(F const &func)
  20. { // Function from lambda !
  21.     return func;
  22. }
  23.  
  24. template <typename... Args> void Callback(std::function<void(Args...)> f){
  25.     // store f and call later
  26. }
  27.  
  28. int main()
  29. {
  30.     Callback(FFL([](int a, float b){
  31.         // do something
  32.     }));
  33.  
  34.     return 0;
  35. }
Success #stdin #stdout 0s 3424KB
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https://ideone.com/omrRr9
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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