fork download
copy 
  1. #include <iostream>
  2. #include <functional>
  3.  
  4. class Toto
  5. {
  6. public:
  7.     int test(float f) { std::cout << "Toto::test " << f << std::endl; return 0; }
  8. } toto;
  9.  
  10. int test(float f)
  11. {
  12.     std::cout << "test " << f << std::endl;
  13.     return 0;
  14. }
  15.  
  16. namespace details
  17. {
  18. 	template <typename T, T t>
  19. 	struct func_impl
  20. 	{
  21. 	    void operator () () const { t(4.0f); }
  22. 	};
  23.  
  24. 	template <typename T, int (T::*method)(float)>
  25. 	struct func_impl<int (T::*)(float), method>
  26. 	{
  27. 	    void operator () () const { (toto.*method)(5.0f); }
  28. 	};
  29.  
  30.  
  31. }
  32.  
  33.  
  34. template <typename T, T t>
  35. void func()
  36. {
  37.     details::func_impl<T, t>{}();
  38. }
  39.  
  40. int main(int, char**)
  41. {
  42.     func<int(*)(float), &test>();
  43.     func<int (Toto::*)(float), &Toto::test>();
  44. }
Success #stdin #stdout 0s 3096KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
test 4
Toto::test 5
https://ideone.com/NhnPTj
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!