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

    Copyright (c) 2007 Tobias Schwinger



    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)

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



#if !defined(BOOST_FUSION_ITERATOR_RANGE_AT_IMPL_HPP_INCLUDED)

#define BOOST_FUSION_ITERATOR_RANGE_AT_IMPL_HPP_INCLUDED



#include <boost/fusion/iterator/advance.hpp>

#include <boost/fusion/iterator/deref.hpp>



namespace boost { namespace fusion

{

    struct iterator_range_tag;



    namespace extension

    {

        template <typename Tag>

        struct at_impl;



        template <>

        struct at_impl<iterator_range_tag>

        {

            template <typename Seq, typename N>

            struct apply

            {

                typedef typename Seq::begin_type begin_type;

                typedef typename result_of::advance<begin_type,N>::type pos;

                typedef typename result_of::deref<pos>::type type;



                static type

                call(Seq& s)

                {

                    return * advance<N>(s.first);

                }

            };

        };

    }

}}



#endif



