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+/*=============================================================================
+ 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_IMPL_HPP
+#define BOOST_FUSION_CONTAINER_MAP_DETAIL_DEREF_IMPL_HPP
+
+#include <boost/fusion/support/config.hpp>
+#include <boost/fusion/sequence/intrinsic/at.hpp>
+#include <boost/type_traits/is_const.hpp>
+
+namespace boost { namespace fusion { namespace extension
+{
+ template <typename>
+ struct deref_impl;
+
+ template <>
+ struct deref_impl<map_iterator_tag>
+ {
+ template <typename It>
+ struct apply
+ {
+ typedef typename
+ result_of::at<
+ typename mpl::if_<
+ is_const<typename It::seq_type>
+ , typename It::seq_type::storage_type const
+ , typename It::seq_type::storage_type
+ >::type
+ , typename It::index
+ >::type
+ type;
+
+ BOOST_FUSION_GPU_ENABLED
+ static type
+ call(It const& it)
+ {
+ return fusion::at<typename It::index>(it.seq->get_data());
+ }
+ };
+ };
+}}}
+
+#endif