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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 |