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- /*=============================================================================
- Copyright (c) 2001-2011 Joel de Guzman
- 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)
- ==============================================================================*/
- #if !defined(FUSION_DEREF_IMPL_05042005_1037)
- #define FUSION_DEREF_IMPL_05042005_1037
- #include <boost/fusion/support/config.hpp>
- #include <boost/fusion/support/detail/access.hpp>
- #include <boost/fusion/container/vector/detail/value_at_impl.hpp>
- #include <boost/type_traits/is_const.hpp>
- #include <boost/mpl/if.hpp>
- namespace boost { namespace fusion
- {
- struct vector_iterator_tag;
- namespace extension
- {
- template <typename Tag>
- struct deref_impl;
- template <>
- struct deref_impl<vector_iterator_tag>
- {
- template <typename Iterator>
- struct apply
- {
- typedef typename Iterator::vector vector;
- typedef typename Iterator::index index;
- typedef typename value_at_impl<vector_tag>::template apply<vector, index>::type element;
- typedef typename
- mpl::if_<
- is_const<vector>
- , typename fusion::detail::cref_result<element>::type
- , typename fusion::detail::ref_result<element>::type
- >::type
- type;
- BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
- static type
- call(Iterator const& i)
- {
- return i.vec.at_impl(index());
- }
- };
- };
- }
- }}
- #endif
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