49 lines
1.4 KiB
C++
49 lines
1.4 KiB
C++
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/*=============================================================================
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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_AT_IMPL_SEP_24_2009_0225PM)
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#define BOOST_FUSION_NVIEW_AT_IMPL_SEP_24_2009_0225PM
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#include <boost/fusion/support/config.hpp>
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#include <boost/fusion/sequence/intrinsic/at.hpp>
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#include <boost/fusion/sequence/intrinsic/value_at.hpp>
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namespace boost { namespace fusion
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{
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struct nview_tag;
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namespace extension
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{
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template<typename Tag>
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struct at_impl;
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template<>
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struct at_impl<nview_tag>
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{
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template<typename Sequence, typename N>
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struct apply
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{
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typedef typename Sequence::sequence_type sequence_type;
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typedef typename Sequence::index_type index_type;
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typedef typename result_of::value_at<index_type, N>::type index;
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typedef typename result_of::at<sequence_type, index>::type type;
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BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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static type
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call(Sequence& seq)
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{
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return fusion::at<index>(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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