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  1. #include <iostream>
  2. #include <type_traits>
  3.  
  4. using namespace std;
  5.  
  6. template<typename T>
  7. T test(typename enable_if<is_integral<T>::value, void*>::type = nullptr)
  8. {
  9. 	return -1;
  10. }
  11.  
  12. template<typename T>
  13. T test(typename enable_if<is_pointer<T>::value, void*>::type = nullptr)
  14. {
  15. 	return nullptr;
  16. }
  17.  
  18. int main() {
  19. 	// your code goes here
  20. 	cout << test<int *>() << endl;
  21. 	cout << test<int>()   << endl;
  22. 	return 0;
  23. }
Success #stdin #stdout 0s 3412KB
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Standard input is empty
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-1
https://ideone.com/yU3mj4
SFINAE for return -1,nullptr
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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