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46 lines
1.3 KiB
46 lines
1.3 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_PRIOR_IMPL_05042005_1145)
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#define FUSION_PRIOR_IMPL_05042005_1145
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#include <boost/fusion/support/config.hpp>
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#include <boost/fusion/container/vector/vector_iterator.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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template <typename Vector, int N>
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struct vector_iterator;
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namespace extension
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{
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template <typename Tag>
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struct prior_impl;
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template <>
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struct prior_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 vector_iterator<vector, index::value-1> 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(i.vec);
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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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