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45 lines
1.3 KiB
45 lines
1.3 KiB
/*============================================================================= |
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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/sequence/intrinsic/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::at<index_type, N>::type index; |
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typedef typename result_of::at<sequence_type, index>::type type; |
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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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