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  1. #include <memory>
  2. #include <iostream>
  3.  
  4.  
  5. template <typename V, typename W>
  6. struct foobar
  7. {	static const int value = 0; };
  8.  
  9. template <typename V>
  10. struct foobar<V, typename std::conditional<1==sizeof(V), std::true_type, std::false_type>::type>
  11. {	static const int value = 1; };
  12.  
  13. template <typename V>
  14. struct foobar<V, typename std::conditional<4==sizeof(V), std::true_type, std::false_type>::type>
  15. {	static const int value = 4; };
  16.  
  17. int main()
  18. {
  19. 	int result = 0;
  20. 	result = foobar<char, std::true_type>::value;
  21. 	result = foobar<short, std::true_type>::value;
  22. 	result = foobar<int, std::true_type>::value;
  23. 	std::cout << "char : " << foobar<char, std::true_type>::value << std::endl;
  24. 	std::cout << "short : " << foobar<short, std::true_type>::value << std::endl;
  25. 	std::cout << "int : " << foobar<int, std::true_type>::value << std::endl;
  26. 	return 0;
  27. }
  28.  
Success #stdin #stdout 0s 3296KB
comments (?)
stdin
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Standard input is empty
stdout
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char : 1
short : 0
int : 4
https://ideone.com/aS7apw
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
secret

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