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  1. #include <iostream>
  2.  
  3. struct Outer
  4. {
  5. 	template<typename T>
  6. 	void go()
  7. 	{
  8. 		std::cout << Test<T>::f() << std::endl;
  9. 	}
  10. private:
  11. 	template<typename T>
  12. 	struct Test
  13. 	{
  14. 		static int f();
  15. 	};
  16. };
  17.  
  18. template<> int Outer::Test<int>::f();
  19. template<> int Outer::Test<double>::f();
  20. extern template struct Outer::Test<int>;
  21. extern template struct Outer::Test<double>;
  22.  
  23. int main()
  24. {
  25. 	Outer o;
  26. 	o.go<int>();
  27. 	o.go<double>();
  28. }
  29.  
  30. template<>
  31. int Outer::Test<int>::f()
  32. {
  33. 	return 1;
  34. }
  35. template<>
  36. int Outer::Test<double>::f()
  37. {
  38. 	return 2;
  39. }
  40.  
  41.  
Success #stdin #stdout 0s 3296KB
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https://ideone.com/opOr15
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
public

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