/*=============================================================================

    Copyright (c) 2001-2003 Joel de Guzman

    Copyright (c) 2004 Peder Holt



    Use, modification and distribution is subject to 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)

==============================================================================*/

#if !defined(FUSION_SEQUENCE_VALUE_AT_HPP)

#define FUSION_SEQUENCE_VALUE_AT_HPP



#include <boost/spirit/fusion/detail/config.hpp>

#include <boost/spirit/fusion/sequence/as_fusion_sequence.hpp>



namespace boost { namespace fusion

{

    namespace meta

    {

        template <typename Tag>

        struct value_at_impl

        {

            template <typename Sequence, int N>

            struct apply {

                typedef int type;

            };

        };



        template <typename Sequence, int N>

        struct value_at_c

        {

            typedef as_fusion_sequence<Sequence> seq_converter;

            typedef typename seq_converter::type seq;



            typedef typename

                value_at_impl<FUSION_GET_TAG(seq)>::

                    template apply<seq, N>::type

            type;

        };



        template <typename Sequence, typename N>

        struct value_at : value_at_c<Sequence, N::value> {};

    }

}}



#endif

