| /*============================================================================= |
| 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_AT_IMPL_SEP_24_2009_0225PM) |
| #define BOOST_FUSION_NVIEW_AT_IMPL_SEP_24_2009_0225PM |
| |
| #include <boost/fusion/sequence/intrinsic/at.hpp> |
| |
| namespace boost { namespace fusion |
| { |
| struct nview_tag; |
| |
| namespace extension |
| { |
| template<typename Tag> |
| struct at_impl; |
| |
| template<> |
| struct at_impl<nview_tag> |
| { |
| template<typename Sequence, typename N> |
| struct apply |
| { |
| typedef typename Sequence::sequence_type sequence_type; |
| typedef typename Sequence::index_type index_type; |
| |
| typedef typename result_of::at<index_type, N>::type index; |
| typedef typename result_of::at<sequence_type, index>::type type; |
| |
| static type |
| call(Sequence& seq) |
| { |
| return fusion::at<index>(seq.seq); |
| } |
| }; |
| }; |
| } |
| |
| }} |
| |
| #endif |