#ifndef BOOST_MPL_VECTOR_AUX_BACK_HPP_INCLUDED

 #define BOOST_MPL_VECTOR_AUX_BACK_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/vector/aux_/back.hpp,v $

 // $Date: 2004/09/02 15:41:19 $

 // $Revision: 1.4 $

 #include <boost/mpl/back_fwd.hpp>

 #include <boost/mpl/next_prior.hpp>

 #include <boost/mpl/vector/aux_/at.hpp>

 #include <boost/mpl/vector/aux_/tag.hpp>

 #include <boost/mpl/aux_/config/typeof.hpp>

 #include <boost/mpl/aux_/config/ctps.hpp>

 namespace boost { namespace mpl {

 #if defined(BOOST_MPL_CFG_TYPEOF_BASED_SEQUENCES)

 template<>

 struct back_impl< aux::vector_tag >

 {

     template< typename Vector > struct apply

         : v_at<

               Vector

             , prior<typename Vector::size>::type::value

             >

     {

     };

 };

 #else

 #if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)

 template< long n_ >

 struct back_impl< aux::vector_tag<n_> >

 {

     template< typename Vector > struct apply

     {

         typedef typename Vector::back type;

     };

 };

 #endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION

 #endif // BOOST_MPL_CFG_TYPEOF_BASED_SEQUENCES

 }}

 #endif // BOOST_MPL_VECTOR_AUX_BACK_HPP_INCLUDED