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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. // Test struct.
  5. template<class T>
  6. struct Foo
  7. {
  8.     T foo;
  9. };
  10.  
  11. // Struct specialization
  12. template<>
  13. struct Foo<bool>
  14. {
  15.     static const int val = 46;
  16. };
  17.  
  18. // #1 Ordinary template
  19. template<class T>
  20. struct functionWrapper {
  21. 	static T foo() {
  22. 		return T();
  23. 	}
  24. };
  25.  
  26.  
  27. // #2 Template specialization
  28. template<>
  29. struct functionWrapper<int> {
  30. 	static int foo() {
  31. 		return 42;
  32. 	}
  33. };
  34.  
  35.  
  36. // #3 Template specialization with template as parameter
  37. template<class T>
  38. struct functionWrapper<struct Foo<T>> {
  39. 	static Foo<T>* foo() {
  40. 		return new Foo<T>();
  41. 	}
  42. };
  43.  
  44.  
  45.  
  46.  
  47.  
  48. int main() {
  49. 	cout << functionWrapper<bool>::foo() << endl;
  50. 	cout << functionWrapper<int>::foo() << endl;
  51.  
  52. 	Foo<bool> *obj = functionWrapper<Foo<bool>>::foo();
  53. 	cout << obj->val;
  54. 	delete obj;
  55.  
  56. 	return 0;
  57. }
Success #stdin #stdout 0s 3472KB
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Standard input is empty
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0
42
46
https://ideone.com/8TXJH4
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
public

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