| /*============================================================================= |
| Copyright (c) 2011 Eric Niebler |
| |
| 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_SINGLE_VIEW_PRIOR_IMPL_JUL_07_2011_1348PM) |
| #define BOOST_FUSION_SINGLE_VIEW_PRIOR_IMPL_JUL_07_2011_1348PM |
| |
| #include <boost/fusion/support/config.hpp> |
| #include <boost/mpl/prior.hpp> |
| |
| namespace boost { namespace fusion |
| { |
| struct single_view_iterator_tag; |
| |
| template <typename Sequence, typename Pos> |
| struct single_view_iterator; |
| |
| namespace extension |
| { |
| template <typename Tag> |
| struct prior_impl; |
| |
| template <> |
| struct prior_impl<single_view_iterator_tag> |
| { |
| template <typename Iterator> |
| struct apply |
| { |
| typedef single_view_iterator< |
| typename Iterator::single_view_type, |
| typename mpl::prior<typename Iterator::position>::type> |
| type; |
| |
| BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED |
| static type |
| call(Iterator const& i) |
| { |
| return type(i.view); |
| } |
| }; |
| }; |
| } |
| |
| }} |
| |
| #endif |
