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  1. #include <type_traits>
  2. #include <utility>
  3. #include <iostream>
  4.  
  5. template <class F, class A> auto Call(
  6. 	typename std::remove_reference<F>::type && f,
  7. 	typename std::remove_reference<A>::type && a
  8. ) -> decltype(f(std::forward<A>(a))) {
  9. 	return f(std::forward<A>(a));
  10. }
  11.  
  12. struct Hoge { };
  13.  
  14. struct Func {
  15. 	void operator () (Hoge const & hoge) const {
  16. 		std::cout << "Hoge const &" << std::endl;		
  17. 	}
  18. 	void operator () (Hoge && hoge) const {
  19. 		std::cout << "Hoge &&" << std::endl;		
  20. 	}
  21. };
  22.  
  23. int main(void) {
  24. 	Call<Func,Hoge>(Func(), Hoge());
  25. 	return 0;
  26. }
  27.  
Success #stdin #stdout 0s 2928KB
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stdin
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Standard input is empty
stdout
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Hoge &&
https://ideone.com/EbsJl
language:
C++14 (gcc 8.3)
created:
12 years ago
visibility:
secret

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