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    Copyright (c) 2011 Eric Niebler

    Distributed under the Boost Software License, Version 1.0. (See accompanying
    file LICENSE_1_0.txt or copy at


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

namespace boost { namespace fusion
    struct iterator_range_tag;

    namespace extension
        template <typename Tag>
        struct size_impl;

        template <>
        struct size_impl<iterator_range_tag>
            template <typename Seq>
            struct apply
              : result_of::distance<
                    typename Seq::begin_type,
                    typename Seq::end_type