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    Copyright (c) 2001-2011 Joel de Guzman
    Copyright (c) 2005-2006 Dan Marsden

    Distributed under the Boost Software License, Version 1.0. (See accompanying
    file LICENSE_1_0.txt or copy at
#if !defined(BOOST_FUSION_EMPTY_IMPL_31122005_1554)
#define BOOST_FUSION_EMPTY_IMPL_31122005_1554

#include <boost/mpl/empty.hpp>

namespace boost { namespace fusion
    struct mpl_sequence_tag;

    namespace extension
        template <typename Sequence>
        struct empty_impl;

        template <>
        struct empty_impl<mpl_sequence_tag>
            template <typename Sequence>
            struct apply : mpl::empty<Sequence> {};