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  1. #include <iostream>
  2. #include <string>
  3. #include <vector>
  4.  
  5. //namespace A {
  6.     template<typename T>
  7.     std::ostream& operator<<(std::ostream& ofs, const std::vector<T>& vec)
  8.     {
  9.         ofs << vec.size() << std::endl;
  10.         for (size_t i = 0; i < vec.size(); i++)
  11.             ofs << vec[i] << std::endl;
  12.         return ofs;
  13.     }
  14. //}
  15. namespace B {
  16.     void func()
  17.     {
  18.         std::vector<std::string> vec{"A", "B", "C"};
  19.         std::cout << vec <<::std::endl;
  20.     }
  21. }
  22. int main()
  23. {
  24.     B::func();
  25.     return 0;
  26. }
  27.  
Success #stdin #stdout 0s 3464KB
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Standard input is empty
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3
A
B
C
https://ideone.com/Ar8RTK
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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