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

    Copyright (c) 2001-2006 Joel de Guzman

    Copyright (c) 2006 Dan Marsden



    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(FUSION_VALUE_AT_KEY_IMPL_09162005_1123)

#define FUSION_VALUE_AT_KEY_IMPL_09162005_1123



#include <boost/mpl/at.hpp>



namespace boost { namespace fusion

{

    struct set_tag;



    namespace extension

    {

        template <typename Tag>

        struct value_at_key_impl;



        template <>

        struct value_at_key_impl<set_tag>

        {

            template <typename Sequence, typename Key>

            struct apply 

            {

                typedef typename Sequence::

                    template meta_at_impl<Key>::type type;

            };

        };

    }

}}



#endif

