50 lines
1.6 KiB
Plaintext
50 lines
1.6 KiB
Plaintext
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/*=============================================================================
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Copyright (c) 2001-2011 Joel de Guzman
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Copyright (c) 2005-2006 Dan Marsden
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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_ADVANCE_IMPL_14122005_2015)
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#define FUSION_ADVANCE_IMPL_14122005_2015
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#include <boost/fusion/support/config.hpp>
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#include <boost/fusion/iterator/advance.hpp>
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#include <boost/mpl/negate.hpp>
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namespace boost { namespace fusion {
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struct reverse_view_iterator_tag;
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template <typename Iterator>
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struct reverse_view_iterator;
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namespace extension
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{
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template<typename Tag>
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struct advance_impl;
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template<>
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struct advance_impl<reverse_view_iterator_tag>
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{
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template<typename Iterator, typename Dist>
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struct apply
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{
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typedef typename Iterator::first_type first_type;
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typedef typename mpl::negate<Dist>::type negative_dist;
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typedef typename result_of::advance<first_type, negative_dist>::type advanced_type;
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typedef reverse_view_iterator<advanced_type> 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 type(boost::fusion::advance<negative_dist>(i.first));
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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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