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  1. #include <iostream>
  2. #include <utility>
  3. using namespace std;
  4.  
  5. template <typename T>
  6. struct container
  7. {
  8. 	container(const T& ref) : _item(ref)
  9. 	{
  10. 		cout << "Const ref constructor" << endl;
  11. 	}
  12.  
  13. 	template <typename U>
  14. 	container(U&& ref) : _item(std::forward<U>(ref))
  15. 	{
  16. 		cout << "Universal ref constructor!" << endl;
  17. 	}
  18.  
  19. 	T _item;
  20. };
  21.  
  22. struct Complex
  23. {
  24.     char content[10];
  25. };
  26.  
  27. struct NotMovable
  28. {
  29. 	NotMovable() {}
  30. 	NotMovable(const NotMovable&) {}
  31. 	NotMovable(NotMovable&&) = delete;
  32.  
  33. 	char content[10];
  34. };
  35.  
  36. int main() {
  37. 	int var = 5;
  38. 	container<int> intTest1(var);
  39. 	container<int> intTest2(std::move(var));
  40. 	container<int> intTest3(10);
  41.  
  42. 	Complex comp{};
  43. 	container<Complex> compTest1(comp);
  44. 	container<Complex> compTest2(std::move(comp));
  45. 	container<Complex> compTest3(Complex{});
  46.  
  47. 	NotMovable nm{};
  48. 	container<NotMovable> nmTest1(nm);
  49. 	// container<NotMovable> nmTest2(std::move(nm)); Won't compile
  50. 	// container<NotMovable> nmTest3(NotMovable{}); Won't compile, not sure why though
  51.  
  52. 	// your code goes here
  53. 	return 0;
  54. }
Success #stdin #stdout 0s 3296KB
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Standard input is empty
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Universal ref constructor!
Universal ref constructor!
Universal ref constructor!
Universal ref constructor!
Universal ref constructor!
Universal ref constructor!
Universal ref constructor!
https://ideone.com/D1iHwn
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
secret

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