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55 lines
1.7 KiB
55 lines
1.7 KiB
3 years ago
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/*=============================================================================
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Copyright (c) 2001-2011 Joel de Guzman
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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==============================================================================*/
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#if !defined(FUSION_DEREF_IMPL_05042005_1037)
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#define FUSION_DEREF_IMPL_05042005_1037
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#include <boost/fusion/support/config.hpp>
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#include <boost/fusion/support/detail/access.hpp>
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#include <boost/fusion/container/vector/detail/value_at_impl.hpp>
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#include <boost/type_traits/is_const.hpp>
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#include <boost/mpl/if.hpp>
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namespace boost { namespace fusion
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{
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struct vector_iterator_tag;
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namespace extension
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{
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template <typename Tag>
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struct deref_impl;
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template <>
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struct deref_impl<vector_iterator_tag>
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{
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template <typename Iterator>
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struct apply
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{
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typedef typename Iterator::vector vector;
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typedef typename Iterator::index index;
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typedef typename value_at_impl<vector_tag>::template apply<vector, index>::type element;
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typedef typename
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mpl::if_<
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is_const<vector>
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, typename fusion::detail::cref_result<element>::type
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, typename fusion::detail::ref_result<element>::type
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>::type
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type;
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BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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static type
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call(Iterator const& i)
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{
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return i.vec.at_impl(index());
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}
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};
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};
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}
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}}
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#endif
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