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  1. namespace X
  2. {
  3.     namespace Y
  4.     {
  5.         template <typename R, typename ...T>
  6.         R foo(T&&... args)
  7.         {
  8.             R r(args...);
  9.             return r;
  10.         }
  11.     }
  12. }
  13.  
  14. class A
  15. {
  16.     template <typename R, typename ...T>
  17.     friend R X::Y::foo(T&&... args);
  18.     A(int x, int y){}
  19. };
  20.  
  21. int main()
  22. {
  23.     X::Y::foo<A>(1, 2);
  24. }
Success #stdin #stdout 0s 2892KB
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https://ideone.com/RHt3f3
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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