text: // Copyright (C) 2004-2017 Free Software Foundation, Inc.
  //
  // This file is part of the GNU ISO C++ Library.  This library is free
  // software; you can redistribute it and/or modify it under the
  // terms of the GNU General Public License as published by the
  // Free Software Foundation; either version 3, or (at your option)
  // any later version.
   
  // This library is distributed in the hope that it will be useful,
  // but WITHOUT ANY WARRANTY; without even the implied warranty of
  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  // GNU General Public License for more details.
   
  // You should have received a copy of the GNU General Public License along
  // with this library; see the file COPYING3.  If not see
  // <http://www.gnu.org/licenses/>.
  
  #include <set>
  #include <testsuite_hooks.h>
   
  struct T { int i; };
  
  // T must be LessThanComparable to pass concept-checks
  bool operator<(T l, T r) { return l.i < r.i; }
  
  int swap_calls;
  
  namespace std
  {
    template<> 
      void 
      set<T>::swap(set<T>&) 
      { ++swap_calls; }
  }
  
  // Should use set specialization for swap.
  void test01()
  {
    std::set<T> A;
    std::set<T> B;
    swap_calls = 0;
    std::swap(A, B);
    VERIFY(1 == swap_calls);
  }
  
  // Should use set specialization for swap.
  void test02()
  {
    using namespace std;
    set<T> A;
    set<T> B;
    swap_calls = 0;
    swap(A, B);
    VERIFY(1 == swap_calls);
  }
  
  // See c++/13658 for background info.
  int main()
  {
    test01();
    test02();
    return 0;
  }
  