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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_05052005_0335) | |
9 | #define BOOST_FUSION_SINGLE_VIEW_05052005_0335 | |
10 | ||
11 | #include <boost/fusion/support/config.hpp> | |
12 | #include <boost/fusion/support/detail/access.hpp> | |
13 | #include <boost/fusion/support/detail/as_fusion_element.hpp> | |
14 | #include <boost/fusion/support/sequence_base.hpp> | |
15 | #include <boost/fusion/view/single_view/single_view_iterator.hpp> | |
16 | #include <boost/fusion/view/single_view/detail/at_impl.hpp> | |
17 | #include <boost/fusion/view/single_view/detail/begin_impl.hpp> | |
18 | #include <boost/fusion/view/single_view/detail/end_impl.hpp> | |
19 | #include <boost/fusion/view/single_view/detail/size_impl.hpp> | |
20 | #include <boost/fusion/view/single_view/detail/value_at_impl.hpp> | |
21 | #include <boost/mpl/bool.hpp> | |
22 | #include <boost/mpl/int.hpp> | |
23 | #include <boost/config.hpp> | |
24 | ||
25 | #if defined (BOOST_MSVC) | |
26 | # pragma warning(push) | |
27 | # pragma warning (disable: 4512) // assignment operator could not be generated. | |
28 | #endif | |
29 | ||
30 | namespace boost { namespace fusion | |
31 | { | |
32 | struct single_view_tag; | |
33 | struct random_access_traversal_tag; | |
34 | struct fusion_sequence_tag; | |
35 | ||
36 | template <typename T> | |
37 | struct single_view : sequence_base<single_view<T> > | |
38 | { | |
39 | typedef single_view_tag fusion_tag; | |
40 | typedef fusion_sequence_tag tag; // this gets picked up by MPL | |
41 | typedef random_access_traversal_tag category; | |
42 | typedef mpl::true_ is_view; | |
43 | typedef mpl::int_<1> size; | |
44 | typedef T value_type; | |
45 | ||
46 | BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED | |
47 | single_view() | |
48 | : val() {} | |
49 | ||
50 | BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED | |
51 | explicit single_view(typename detail::call_param<T>::type in_val) | |
52 | : val(in_val) {} | |
53 | ||
54 | value_type val; | |
55 | }; | |
56 | ||
57 | template <typename T> | |
58 | BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED | |
59 | inline single_view<typename detail::as_fusion_element<T>::type> | |
60 | make_single_view(T const& v) | |
61 | { | |
62 | return single_view<typename detail::as_fusion_element<T>::type>(v); | |
63 | } | |
64 | }} | |
65 | ||
66 | #if defined (BOOST_MSVC) | |
67 | # pragma warning(pop) | |
68 | #endif | |
69 | ||
70 | #endif | |
71 | ||
72 |