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  1. #include <iostream>
  2. #include <type_traits>
  3.  
  4. template <typename T> struct CSizex {};
  5.  
  6. struct CSize : public CSizex<int> {};
  7.  
  8. struct Logger
  9. {
  10.     template <typename T>
  11.     Logger& operator<<(const CSizex<T>& size)
  12.     {
  13.     	std::cout << __PRETTY_FUNCTION__ << '\n';
  14.         return *this;
  15.     }
  16.  
  17.     template <typename T>
  18.     typename std::enable_if<std::is_arithmetic<T>::value
  19.                          || std::is_integral<T>::value 
  20.                          || std::is_enum<T>::value, Logger&>::type
  21.     operator<<(const T& value)
  22.     {
  23.     	std::cout << __PRETTY_FUNCTION__ << '\n';
  24.         return *this;
  25.     }
  26. };
  27.  
  28. int main()
  29. {
  30.     CSize size;
  31.     Logger() << size;
  32.     Logger() << CSize();
  33.     Logger() << CSizex<float>();
  34. }
Success #stdin #stdout 0s 3340KB
comments (?)
stdin 
Standard input is empty
stdout 
Logger& Logger::operator<<(const CSizex<T>&) [with T = int]
Logger& Logger::operator<<(const CSizex<T>&) [with T = int]
Logger& Logger::operator<<(const CSizex<T>&) [with T = float]
https://ideone.com/Ur4zVu
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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