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  1. #include <string>
  2. #include <memory>
  3. #include <iostream>
  4.  
  5. namespace X
  6. {
  7.     class S;
  8. }
  9.  
  10. std::string r(X::S &s);
  11.  
  12. namespace X
  13. {
  14.     class S
  15.     {
  16.         friend std::string (::r)(X::S &s);
  17.         std::unique_ptr<std::istream> s_;
  18.     };
  19. }
  20.  
  21. std::string r(X::S &s)
  22. {
  23.     auto& x = s.s_;
  24.     return "";
  25. }
  26.  
  27. int main(void) {}
Success #stdin #stdout 0s 2892KB
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https://ideone.com/EyQAL7
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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