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  1. #include <iostream>
  2.  
  3. template<typename T>
  4. class friended1;
  5.  
  6. template<typename T>
  7. class test1
  8. {
  9.    friend class friended1<T>;
  10.    void print() const
  11.    {
  12.       std::cout << "test1" << std::endl;
  13.    }
  14. };
  15.  
  16. template<typename T>
  17. class friended1
  18. {
  19. public:
  20.    template<typename U>
  21.    static void create()
  22.    {
  23.       test1<U>().print();
  24.    }
  25. };
  26.  
  27. template<typename T>
  28. class friended2;
  29.  
  30. template<typename T>
  31. class test2
  32. {
  33.    template<typename U>
  34.    friend class friended2;
  35.    void print() const
  36.    {
  37.       std::cout << "test2" << std::endl;
  38.    }
  39. };
  40.  
  41. template<typename T>
  42. class friended2
  43. {
  44. public:
  45.    template<typename U>
  46.    static void create()
  47.    {
  48.       test2<U>().print();
  49.    }
  50. };
  51.  
  52. int main()
  53. {
  54.    friended1<int>::create<int>();
  55.    //friended1<int>::create<double>();
  56.    friended2<int>::create<int>();
  57.    friended2<int>::create<double>();
  58. }
Success #stdin #stdout 0s 3340KB
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Standard input is empty
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test1
test2
test2
https://ideone.com/o9ooii
language:
C++ (gcc 8.3)
created:
10 years ago
visibility:
public

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