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// Copyright (C) 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.
 
// 25.3.2 [lib.alg.nth.element]
 
// { dg-do compile }
 
#include <algorithm>
#include <testsuite_iterators.h>
 
using __gnu_test::random_access_iterator_wrapper;
 
struct S { };
 
bool 
operator<(const S&, const S&) {return true;}
 
struct X { };
 
bool 
predicate(const X&, const X&) {return true;}
 
void
test1(random_access_iterator_wrapper<S>& s)
{ std::nth_element(s, s, s); }
 
void
test2(random_access_iterator_wrapper<X>& x)
{ std::nth_element(x, x, x, predicate); }