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  1. #include <iostream>
  2. #include <type_traits>
  3. #include <typeinfo>
  4.  
  5. using namespace std;
  6.  
  7. true_type foo();
  8.  
  9. template <typename T>
  10. struct bar{
  11. 	using def = conditional_t<decltype(foo())::value, char, void>;
  12. };
  13.  
  14. int main() {
  15. 	cout << typeid(bar<int>::def).name() << endl;
  16.  
  17. 	cout << decltype(foo())::value << endl;
  18. }
Success #stdin #stdout 0s 3412KB
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c
1
https://ideone.com/vnn5nX
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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