adapted/array/deref_impl.hpp

0001 /*=============================================================================
0002     Copyright (c) 2010 Christopher Schmidt
0003
0004     Distributed under the Boost Software License, Version 1.0. (See accompanying
0005     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
0006 ==============================================================================*/
0007
0008 #ifndef BOOST_FUSION_ADAPTED_ARRAY_DEREF_IMPL_HPP
0009 #define BOOST_FUSION_ADAPTED_ARRAY_DEREF_IMPL_HPP
0010
0011 #include <boost/fusion/support/config.hpp>
0012 #include <boost/type_traits/add_reference.hpp>
0013 #include <boost/type_traits/remove_extent.hpp>
0014
0015 namespace boost { namespace fusion { namespace extension
0016 {
0017     template <typename>
0018     struct deref_impl;
0019
0020     template <>
0021     struct deref_impl<po_array_iterator_tag>
0022     {
0023         template <typename It>
0024         struct apply
0025         {
0026             typedef typename
0027                 add_reference<
0028                     typename remove_extent<typename It::seq_type>::type
0029                 >::type
0030             type;
0031
0032             BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
0033             static type
0034             call(It const& it)
0035             {
0036                 return (*it.seq)[It::index::value];
0037             }
0038         };
0039     };
0040 }}}
0041
0042 #endif