#ifndef BOOST_MPL_MAX_ELEMENT_HPP_INCLUDED

#define BOOST_MPL_MAX_ELEMENT_HPP_INCLUDED

// Copyright Aleksey Gurtovoy 2000-2004

//

// Distributed under the Boost Software License, Version 1.0. 

// (See accompanying file LICENSE_1_0.txt or copy at 

// http://www.boost.org/LICENSE_1_0.txt)

//

// See http://www.boost.org/libs/mpl for documentation.

// $Id: max_element.hpp 49267 2008-10-11 06:19:02Z agurtovoy $

// $Date: 2008-10-11 02:19:02 -0400 (Sat, 11 Oct 2008) $

// $Revision: 49267 $

#include <boost/mpl/less.hpp>

#include <boost/mpl/iter_fold.hpp>

#include <boost/mpl/begin_end.hpp>

#include <boost/mpl/if.hpp>

#include <boost/mpl/deref.hpp>

#include <boost/mpl/apply.hpp>

#include <boost/mpl/aux_/common_name_wknd.hpp>

#include <boost/mpl/aux_/na_spec.hpp>

namespace boost { namespace mpl {

BOOST_MPL_AUX_COMMON_NAME_WKND(max_element)

namespace aux {

template< typename Predicate >

struct select_max

{

    template< typename OldIterator, typename Iterator >

    struct apply

    {

        typedef typename apply2<

              Predicate

            , typename deref<OldIterator>::type

            , typename deref<Iterator>::type

            >::type condition_;

        typedef typename if_<

              condition_

            , Iterator

            , OldIterator

            >::type type;

    };

};

} // namespace aux 

template<

      typename BOOST_MPL_AUX_NA_PARAM(Sequence)

    , typename Predicate = less<_,_>

    >

struct max_element

    : iter_fold<

          Sequence

        , typename begin<Sequence>::type

        , protect< aux::select_max<Predicate> >

        >

{

};

BOOST_MPL_AUX_NA_SPEC(1, max_element)

}}

#endif // BOOST_MPL_MAX_ELEMENT_HPP_INCLUDED