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  1. #include <iostream>
  2. #include <typeinfo>
  3.  
  4. template<class T>
  5. struct printer {    
  6.     friend std::ostream &operator<<(std::ostream &output, const printer&) {
  7.         return output << typeid(int).name();
  8.     }
  9. };
  10.  
  11. template<class T>
  12. struct printer<T&> {    
  13.     friend std::ostream &operator<<(std::ostream &output, const printer&) {
  14.         return output << typeid(int).name() << "&";
  15.     }
  16. };
  17.  
  18. template<class T>
  19. struct printer<T&&> {    
  20.     friend std::ostream &operator<<(std::ostream &output, const printer&) {
  21.         return output << typeid(int).name() << "&&";
  22.     }
  23. };
  24.  
  25. int main(int argc,char *argv[])
  26. {
  27. 	std::cout << printer<int>() << std::endl;
  28. 	std::cout << printer<int&>() << std::endl;
  29. 	std::cout << printer<int&&>() << std::endl;
  30. }
  31.  
Success #stdin #stdout 0s 2928KB
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Standard input is empty
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i
i&
i&&
https://ideone.com/7XGwH
language:
C++14 (gcc 8.3)
created:
13 years ago
visibility:
public

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