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// { dg-options "-std=gnu++0x" }
 
// 2010-03-25  Paolo Carlini  <paolo.carlini@oracle.com>
 
// Copyright (C) 2010 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 <unordered_set>
#include <testsuite_hooks.h>
 
void test01()
{
  bool test __attribute__((unused)) = true;
 
  std::unordered_set<int> us1, us2;
  VERIFY( us1 == us2 );
  VERIFY( !(us1 != us2) );
 
  us1.insert(1);
  us2.insert(1);
  VERIFY( us1 == us2 );
  VERIFY( !(us1 != us2) );
 
  us1.insert(2);
  us2.insert(2);
  VERIFY( us1 == us2 );
  VERIFY( !(us1 != us2) );
 
  us1.insert(1);
  us2.insert(1);
  VERIFY( us1 == us2 );
  VERIFY( !(us1 != us2) );
 
  us1.insert(3);
  VERIFY( us1 != us2 );
  VERIFY( !(us1 == us2) );
 
  us2.insert(3);
  VERIFY( (us1 == us2) );
  VERIFY( !(us1 != us2) );
 
  us2.clear();
  VERIFY( us1 != us2 );
  VERIFY( !(us1 == us2) );
 
  us1.clear();
  VERIFY( us1 == us2 );
  VERIFY( !(us1 != us2) );
 
  us1.insert(1);
  us2.insert(2);
  VERIFY( us1 != us2 );
  VERIFY( !(us1 == us2) );
 
  us1.insert(2);
  us2.insert(1);
  VERIFY( us1 == us2 );
  VERIFY( !(us1 != us2) );
 
  us1.insert(3);
  us2.insert(4);
  VERIFY( us1 != us2 );
  VERIFY( !(us1 == us2) );
 
  us1.insert(4);
  VERIFY( us1 != us2 );
  VERIFY( !(us1 == us2) );
 
  us2.insert(3);
  VERIFY( us1 == us2 );
  VERIFY( !(us1 != us2) );
 
  us1.insert(1);
  us2.insert(1);
  VERIFY( us1 == us2 );
  VERIFY( !(us1 != us2) );
 
  us1.insert(4);
  us2.insert(4);
  VERIFY( us1 == us2 );
  VERIFY( !(us1 != us2) );
 
  const std::unordered_set<int> cus1(us1), cus2(us2);
  VERIFY( cus1 == cus2 );
  VERIFY( !(cus1 != cus2) );
  VERIFY( cus1 == us2 );
  VERIFY( !(us1 != cus2) );
}
 
int main()
{
  test01();
  return 0;
}