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// 2001-04-06 gdr

// Copyright (C) 2000, 2005, 2009 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 <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());

}