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  1. #include <iostream>
  2. #include <functional>
  3.  
  4. template <typename func_t, func_t func>
  5. struct Foo {
  6.     template <typename... Arguments>
  7. 	void execute(Arguments... args) {
  8. 		func(args ...);
  9. 	}
  10. };
  11.  
  12. template <typename T, typename func_t, func_t func>
  13. struct FooMember {
  14. 	T member;
  15.  
  16. 	FooMember(T member) : member(member) {}
  17.  
  18. 	template <typename... Arguments>
  19. 	void execute(Arguments... args) {
  20. 		std::function<void(T&, Arguments ...)> f(func);
  21. 		f(this->member, args ...);
  22. 	}
  23. };
  24.  
  25. /////////////////////////////////////////////
  26.  
  27. struct Bar {
  28. 	int z;
  29.  
  30. 	Bar(int z) : z(z) {}
  31. 	void add(int x, int y) { std::cout << x + y + z << std::endl; }
  32. };
  33.  
  34. void padd(int x, int y, int z) { std::cout << x + y + z << std::endl; }
  35.  
  36. int main() {
  37. 	auto a = Foo<decltype(&padd), &padd>();
  38. 	auto b = FooMember<Bar, decltype(&Bar::add), &Bar::add>(Bar(2));
  39.  
  40. 	a.execute(4, 5, 6); // prints 4+5+6 : 15
  41. 	b.execute(4, 5); // prints 4+5+a.z : 4+5+2 : 11
  42.  
  43. 	return 0;
  44. }
  45.  
Success #stdin #stdout 0s 2852KB
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Standard input is empty
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15
11
https://ideone.com/0jcbUi
language:
C++14 (gcc 8.3)
created:
12 years ago
visibility:
public

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