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  1. #include <iostream>
  2. #include <type_traits>
  3. #include <typeinfo>
  4.  
  5. using namespace std;
  6.  
  7. template <typename T>
  8. decltype(T(), declval<bool>()) isConstructable() { return true; }
  9.  
  10. int main() {
  11. 	cout << typeid(isConstructable<int>()).name() << ' ' << is_rvalue_reference<decltype(isConstructable<int>())>::value << endl;
  12. }
Success #stdin #stdout 0s 3468KB
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b 1
https://ideone.com/jQnTp8
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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