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1 | /*============================================================================= |
2 | Copyright (c) 2001-2011 Joel de Guzman | |
3 | ||
4 | Distributed under the Boost Software License, Version 1.0. (See accompanying | |
5 | file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
6 | ==============================================================================*/ | |
7 | #if !defined(FUSION_BEGIN_IMPL_05062005_1226) | |
8 | #define FUSION_BEGIN_IMPL_05062005_1226 | |
9 | ||
10 | #include <boost/fusion/support/config.hpp> | |
11 | ||
12 | namespace boost { namespace fusion | |
13 | { | |
14 | struct iterator_range_tag; | |
15 | ||
16 | namespace extension | |
17 | { | |
18 | template <typename Tag> | |
19 | struct begin_impl; | |
20 | ||
21 | template <> | |
22 | struct begin_impl<iterator_range_tag> | |
23 | { | |
24 | template <typename Sequence> | |
25 | struct apply | |
26 | { | |
27 | typedef typename Sequence::begin_type type; | |
28 | ||
29 | BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED | |
30 | static type | |
31 | call(Sequence& s) | |
32 | { | |
33 | return s.first; | |
34 | } | |
35 | }; | |
36 | }; | |
37 | } | |
38 | }} | |
39 | ||
40 | #endif | |
41 | ||
42 |