

#ifndef BOOST_MPL_AT_HPP_INCLUDED

#define BOOST_MPL_AT_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.



// $Source$

// $Date: 2004-09-03 21:33:47 -0400 (Fri, 03 Sep 2004) $

// $Revision: 24897 $



#include <boost/mpl/at_fwd.hpp>

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

#include <boost/mpl/long.hpp>

#include <boost/mpl/sequence_tag.hpp>

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

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

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



namespace boost { namespace mpl {



template<

      typename BOOST_MPL_AUX_NA_PARAM(Sequence)

    , typename BOOST_MPL_AUX_NA_PARAM(N)

    >

struct at

    : at_impl< typename sequence_tag<Sequence>::type >

        ::template apply< Sequence,N >

{

    BOOST_MPL_AUX_LAMBDA_SUPPORT(2,at,(Sequence,N))

};



template<

      typename Sequence

    , BOOST_MPL_AUX_NTTP_DECL(long, N)

    >

struct at_c

    : at_impl< typename sequence_tag<Sequence>::type >

        ::template apply< Sequence,mpl::long_<N> >

{

};



BOOST_MPL_AUX_NA_SPEC(2, at)



}}



#endif // BOOST_MPL_AT_HPP_INCLUDED

