/*=============================================================================
    Copyright (c) 2009 Christopher Schmidt

    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)
==============================================================================*/

#ifndef BOOST_FUSION_CONTAINER_MAP_DETAIL_DEREF_DATA_IMPL_HPP
#define BOOST_FUSION_CONTAINER_MAP_DETAIL_DEREF_DATA_IMPL_HPP

#include <boost/fusion/support/config.hpp>
#include <boost/fusion/iterator/value_of.hpp>
#include <boost/fusion/iterator/deref.hpp>
#include <boost/fusion/support/detail/access.hpp>
#include <boost/type_traits/is_const.hpp>
#include <boost/mpl/if.hpp>

namespace boost {
namespace fusion {
namespace extension {
template <typename>
struct deref_data_impl;

template <>
struct deref_data_impl<map_iterator_tag>
{
    template <typename It>
    struct apply
    {
        typedef typename result_of::value_of<It>::type::second_type data;

        typedef typename
        mpl::if_<
        is_const<typename It::seq_type>
        , typename detail::cref_result<data>::type
        , typename detail::ref_result<data>::type
        >::type
        type;

        BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
        static type
        call(It const& it)
        {
            return fusion::deref(it).second;
        }
    };
};
}
}
}

#endif
