| 1 | /*============================================================================= |
|---|---|
| 2 | Copyright (c) 2001-2011 Joel de Guzman |
| 3 | Copyright (c) 2011 Eric Niebler |
| 4 | |
| 5 | Distributed under the Boost Software License, Version 1.0. (See accompanying |
| 6 | file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
| 7 | ==============================================================================*/ |
| 8 | #if !defined(BOOST_FUSION_SINGLE_VIEW_NEXT_IMPL_05052005_0331) |
| 9 | #define BOOST_FUSION_SINGLE_VIEW_NEXT_IMPL_05052005_0331 |
| 10 | |
| 11 | #include <boost/fusion/support/config.hpp> |
| 12 | #include <boost/mpl/next.hpp> |
| 13 | #include <boost/static_assert.hpp> |
| 14 | |
| 15 | namespace boost { namespace fusion |
| 16 | { |
| 17 | struct single_view_iterator_tag; |
| 18 | |
| 19 | template <typename SingleView, typename Pos> |
| 20 | struct single_view_iterator; |
| 21 | |
| 22 | namespace extension |
| 23 | { |
| 24 | template <typename Tag> |
| 25 | struct next_impl; |
| 26 | |
| 27 | template <> |
| 28 | struct next_impl<single_view_iterator_tag> |
| 29 | { |
| 30 | template <typename Iterator> |
| 31 | struct apply |
| 32 | { |
| 33 | typedef single_view_iterator< |
| 34 | typename Iterator::single_view_type, |
| 35 | typename mpl::next<typename Iterator::position>::type> |
| 36 | type; |
| 37 | |
| 38 | BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED |
| 39 | static type |
| 40 | call(Iterator const& i) |
| 41 | { |
| 42 | // Workaround for ICE on GCC 4.0.0. |
| 43 | // see https://svn.boost.org/trac/boost/ticket/5808 |
| 44 | typedef typename type::position position; |
| 45 | BOOST_STATIC_ASSERT((position::value < 2)); |
| 46 | return type(i.view); |
| 47 | } |
| 48 | }; |
| 49 | }; |
| 50 | } |
| 51 | }} |
| 52 | |
| 53 | #endif |
| 54 | |
| 55 | |
| 56 |