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  1. #include <iostream>
  2. #include <vector>
  3.  
  4. namespace A {
  5.     struct B {};
  6.     std::ostream& operator<<(std::ostream& stream, B) {
  7.         return stream;
  8.         }
  9.  
  10.     std::ostream& operator<<(std::ostream& stream,
  11.                              const std::vector<bool>& vec) {
  12.         for (const auto& b : vec)
  13.             stream << b;
  14.  
  15.         return stream;
  16.         }
  17.  
  18.     void foo() {
  19.         std::vector<bool> vec = {1, 0, 1, 1};
  20.         std::cout << vec << '\n';
  21.         }
  22.     }
  23.  
  24. int main() {
  25.     A::foo();
  26.     }
  27.  
  28.  
  29.  
Success #stdin #stdout 0s 4340KB
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1011
https://ideone.com/bPVwMw
language:
C++14 (gcc 8.3)
created:
3 years ago
visibility:
public

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