/*=============================================================================
    Copyright (c) 2001-2006 Joel de Guzman

    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_DEREF_05042005_1019)
#define FUSION_DEREF_05042005_1019

#include <boost/fusion/support/iterator_base.hpp>

namespace boost { namespace fusion
{
    namespace extension
    {
        template <typename Tag>
        struct deref_impl
        {
            template <typename Iterator>
            struct apply {};
        };
    }

    namespace result_of
    {
        template <typename Iterator>
        struct deref
        {
            typedef typename
                extension::deref_impl<typename Iterator::ftag>::
                    template apply<Iterator>::type
            type;
        };
    }

    template <typename Iterator>
    typename result_of::deref<Iterator>::type
    deref(Iterator const& i)
    {
        typename result_of::deref<Iterator>::type result =
            extension::deref_impl<typename Iterator::ftag>::
                template apply<Iterator>::call(i);
        return result;
    }

    template <typename Iterator>
    typename result_of::deref<Iterator>::type
    operator*(iterator_base<Iterator> const& i)
    {
        return fusion::deref(i.cast());
    }
}}

#endif