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Diffstat (limited to 'boost/fusion/view/nview/detail/deref_impl.hpp')
-rw-r--r-- | boost/fusion/view/nview/detail/deref_impl.hpp | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/boost/fusion/view/nview/detail/deref_impl.hpp b/boost/fusion/view/nview/detail/deref_impl.hpp new file mode 100644 index 0000000000..075f0b0f18 --- /dev/null +++ b/boost/fusion/view/nview/detail/deref_impl.hpp @@ -0,0 +1,48 @@ +/*============================================================================= + Copyright (c) 2009 Hartmut Kaiser + + Distributed under the Boost Software License, Version 1.0. (See accompanying + file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) +==============================================================================*/ + +#if !defined(BOOST_FUSION_NVIEW_DEREF_IMPL_SEP_24_2009_0818AM) +#define BOOST_FUSION_NVIEW_DEREF_IMPL_SEP_24_2009_0818AM + +#include <boost/fusion/iterator/deref.hpp> +#include <boost/fusion/container/vector.hpp> + +namespace boost { namespace fusion +{ + struct nview_iterator_tag; + + namespace extension + { + template<typename Tag> + struct deref_impl; + + template<> + struct deref_impl<nview_iterator_tag> + { + template<typename Iterator> + struct apply + { + typedef typename Iterator::first_type first_type; + typedef typename Iterator::sequence_type sequence_type; + + typedef typename result_of::deref<first_type>::type index; + typedef typename result_of::at< + typename sequence_type::sequence_type, index>::type type; + + static type call(Iterator const& i) + { + return at<index>(i.seq.seq); + } + }; + }; + + } + +}} + +#endif + |