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48 lines
1.4 KiB
48 lines
1.4 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_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/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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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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