forked from boostorg/fusion
Kohei Takahashi
2114bfca6c
Note 1: Forwarding functions are specified as a C++14 constexpr since std::forward is not a constexpr within C++11. Note 2: Though I'm not sure why it doesn't compile, some declarations are specified as a C++14 constexpr or non-constexpr. Note 3: Boost.Tuple adaptation and TR1-based tuple implementations are not constexpr.
51 lines
1.5 KiB
C++
51 lines
1.5 KiB
C++
/*=============================================================================
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Copyright (c) 2009 Hartmut Kaiser
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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(BOOST_FUSION_NVIEW_DEREF_IMPL_SEP_24_2009_0818AM)
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#define BOOST_FUSION_NVIEW_DEREF_IMPL_SEP_24_2009_0818AM
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#include <boost/fusion/support/config.hpp>
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#include <boost/fusion/iterator/deref.hpp>
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#include <boost/fusion/container/vector.hpp>
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namespace boost { namespace fusion
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{
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struct nview_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<nview_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::first_type first_type;
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typedef typename Iterator::sequence_type sequence_type;
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typedef typename result_of::deref<first_type>::type index;
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typedef typename result_of::at<
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typename sequence_type::sequence_type, index>::type type;
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BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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static type call(Iterator const& i)
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{
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return at<index>(i.seq.seq);
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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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