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// 2001-04-06 gdr
 
// Copyright (C) 2000, 2005 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 2, 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 COPYING.  If not, write to the Free
// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
// USA.
 
#include <vector>
#include <algorithm>
 
//
// 25.1.8 Make sure std::equal doesn't make any extra assumption
//        about operator== and operator!=
//
 
struct X { };
 
bool operator==(X, X) { return true; }
 
// Not implemented on purpose.  { dg-do link }
bool operator!=(X, X);
 
int main()
{
  std::vector<X> v, w;
  return !std::equal(v.begin(), v.end(), w.begin());
}