#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.

 // $Source: /cvsroot/boost/boost/boost/mpl/max_element.hpp,v $

 // $Date: 2004/09/02 15:40:41 $

 // $Revision: 1.7 $

 #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