#ifndef BOOST_MPL_LIST_AUX_FRONT_HPP_INCLUDED

#define BOOST_MPL_LIST_AUX_FRONT_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_/front.hpp,v $

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

// $Revision: 1.4 $

#include <boost/mpl/front_fwd.hpp>

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

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

#include <boost/mpl/aux_/nttp_decl.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 front_impl< aux::vector_tag >

{

    template< typename Vector > struct apply

        : v_at<Vector,0>

    {

    };

};

#else

#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)

template< BOOST_MPL_AUX_NTTP_DECL(long, n_) >

struct front_impl< aux::vector_tag<n_> >

{

    template< typename Vector > struct apply

    {

        typedef typename Vector::item0 type;

    };

};

#endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION

#endif // BOOST_MPL_CFG_TYPEOF_BASED_SEQUENCES

}}

#endif // BOOST_MPL_LIST_AUX_FRONT_HPP_INCLUDED