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  1. #include <iostream>
  2. #include <type_traits>
  3. using namespace std;
  4.  
  5. struct A {
  6. 	A(int) {}
  7. };
  8.  
  9. struct B {
  10. 	B() {}
  11. };
  12.  
  13. template <typename T, typename = typename enable_if<is_constructible<T, int>::value>::type>
  14. bool foo(){
  15. 	return true;
  16. }
  17.  
  18. template <typename T, typename = typename enable_if<!is_constructible<T, int>::value>::type>
  19. bool foo(...) {
  20. 	return false;
  21. }
  22.  
  23. int main() {
  24. 	std::cout << foo<A>() << '\n';
  25. 	std::cout << foo<B>() << '\n';
  26. 	return 0;
  27. }
Success #stdin #stdout 0s 3140KB
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https://ideone.com/sgNVr5
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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