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  1. #include <algorithm>
  2. #include <iomanip>
  3. #include <iostream>
  4. #include <iterator>
  5. #include <set>
  6. #include <string_view>
  7.  
  8. template<typename T>
  9. std::ostream& operator<<(std::ostream& out, const std::set<T>& set)
  10. {
  11.     if (set.empty())
  12.         return out << "{}";
  13.     out << "{ " << *set.begin();
  14.     std::for_each(std::next(set.begin()), set.end(), [&out](const T& element)
  15.     {
  16.         out << ", " << element;
  17.     });
  18.     return out << " }";
  19. }
  20.  void test(std::set<int> s)
  21.  {
  22.      std::cout << s << " in test " << '\n';
  23.  }
  24. int main()
  25. {
  26.     std::set<int> set;
  27.     test(std::move(set));
  28.  
  29.     set.insert(2);
  30.     std::cout << set << '\n';
  31.  
  32.     set.erase(1);
  33.     std::cout << set << "\n\n";
  34.  
  35. }
Success #stdin #stdout 0s 5320KB
comments (?)
stdin
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Standard input is empty
stdout
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{} in test 
{ 2 }
{ 2 }
https://ideone.com/zuHJyU
language:
C++14 (gcc 8.3)
created:
9 days ago
visibility:
public

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