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  1. #include <iostream>
  2. #include <type_traits>
  3.  
  4. template <typename T,typename Enable=void>
  5. struct test
  6. {
  7. 	const char* value = "Primary";
  8. };
  9.  
  10. #if 1 // toggle this
  11.  
  12. template <typename T>
  13. struct test<T,typename std::enable_if< std::is_same<T,T>::value >::type > 
  14. {
  15. 	const char* value = "Specialization";
  16. };
  17.  
  18. #else
  19.  
  20. template <typename T>                                    
  21. struct test<T,typename std::enable_if< std::is_same<T,T>::value,T >::type> 
  22. {                                                          ///  ^    
  23. 	const char* value = "Specialization";
  24. };
  25.  
  26. #endif
  27.  
  28. int main() {
  29. 	test<int> v;
  30. 	std::cout << v.value << std::endl;
  31. 	return 0;
  32. }
Success #stdin #stdout 0s 4520KB
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Standard input is empty
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Specialization
https://ideone.com/7v4TTS
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
public

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