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1 | /*============================================================================= |
2 | Copyright (c) 2005-2012 Joel de Guzman | |
3 | Copyright (c) 2005-2006 Dan Marsden | |
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_DEQUE_DETAIL_KEYED_ELEMENT_26112006_1330) | |
9 | #define BOOST_FUSION_DEQUE_DETAIL_KEYED_ELEMENT_26112006_1330 | |
10 | ||
11 | #include <boost/fusion/support/config.hpp> | |
12 | #include <boost/fusion/support/detail/access.hpp> | |
13 | #include <boost/fusion/iterator/deref.hpp> | |
14 | #include <boost/fusion/iterator/next.hpp> | |
15 | ||
16 | namespace boost { namespace fusion | |
17 | { | |
18 | struct fusion_sequence_tag; | |
19 | }} | |
20 | ||
21 | namespace boost { namespace fusion { namespace detail | |
22 | { | |
23 | struct nil_keyed_element | |
24 | { | |
25 | typedef fusion_sequence_tag tag; | |
26 | BOOST_FUSION_GPU_ENABLED | |
27 | void get(); | |
28 | ||
29 | template<typename It> | |
30 | BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED | |
31 | static nil_keyed_element | |
32 | from_iterator(It const&) | |
33 | { | |
34 | return nil_keyed_element(); | |
35 | } | |
36 | }; | |
37 | ||
38 | template <typename Key, typename Value, typename Rest> | |
39 | struct keyed_element : Rest | |
40 | { | |
41 | typedef Rest base; | |
42 | typedef fusion_sequence_tag tag; | |
43 | using Rest::get; | |
44 | ||
45 | template <typename It> | |
46 | BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED | |
47 | static keyed_element | |
48 | from_iterator(It const& it) | |
49 | { | |
50 | return keyed_element( | |
51 | *it, base::from_iterator(fusion::next(it))); | |
52 | } | |
53 | ||
54 | BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED | |
55 | keyed_element(keyed_element const& rhs) | |
56 | : Rest(rhs.get_base()), value_(rhs.value_) | |
57 | {} | |
58 | ||
59 | #if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES) | |
60 | BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED | |
61 | keyed_element(keyed_element&& rhs) | |
62 | : Rest(rhs.forward_base()) | |
63 | , value_(BOOST_FUSION_FWD_ELEM(Value, rhs.value_)) | |
64 | {} | |
65 | #endif | |
66 | ||
67 | template <typename U, typename Rst> | |
68 | BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED | |
69 | keyed_element(keyed_element<Key, U, Rst> const& rhs | |
70 | , typename enable_if<is_convertible<U, Value> >::type* = 0) | |
71 | : Rest(rhs.get_base()), value_(rhs.value_) | |
72 | {} | |
73 | ||
74 | #if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES) | |
75 | #endif | |
76 | ||
77 | BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED | |
78 | Rest& get_base() BOOST_NOEXCEPT | |
79 | { | |
80 | return *this; | |
81 | } | |
82 | ||
83 | BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED | |
84 | Rest const& get_base() const BOOST_NOEXCEPT | |
85 | { | |
86 | return *this; | |
87 | } | |
88 | ||
89 | #if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES) | |
90 | BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED | |
91 | Rest&& forward_base() BOOST_NOEXCEPT | |
92 | { | |
93 | return std::move(*static_cast<Rest*>(this)); | |
94 | } | |
95 | #endif | |
96 | ||
97 | BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED | |
98 | typename cref_result<Value>::type get(Key) const | |
99 | { | |
100 | return value_; | |
101 | } | |
102 | ||
103 | BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED | |
104 | typename ref_result<Value>::type get(Key) | |
105 | { | |
106 | return value_; | |
107 | } | |
108 | ||
109 | BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED | |
110 | keyed_element( | |
111 | typename detail::call_param<Value>::type value | |
112 | , Rest const& rest) | |
113 | : Rest(rest), value_(value) | |
114 | {} | |
115 | ||
116 | #if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES) | |
117 | BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED | |
118 | keyed_element(Value&& value, Rest&& rest) | |
119 | : Rest(std::move(rest)) | |
120 | , value_(BOOST_FUSION_FWD_ELEM(Value, value)) | |
121 | {} | |
122 | #endif | |
123 | ||
124 | BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED | |
125 | keyed_element() | |
126 | : Rest(), value_() | |
127 | {} | |
128 | ||
129 | template<typename U, typename Rst> | |
130 | BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED | |
131 | keyed_element& operator=(keyed_element<Key, U, Rst> const& rhs) | |
132 | { | |
133 | base::operator=(static_cast<Rst const&>(rhs)); // cast for msvc-7.1 | |
134 | value_ = rhs.value_; | |
135 | return *this; | |
136 | } | |
137 | ||
138 | BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED | |
139 | keyed_element& operator=(keyed_element const& rhs) | |
140 | { | |
141 | base::operator=(rhs); | |
142 | value_ = rhs.value_; | |
143 | return *this; | |
144 | } | |
145 | ||
146 | #if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES) | |
147 | BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED | |
148 | keyed_element& operator=(keyed_element&& rhs) | |
149 | { | |
150 | base::operator=(rhs.forward_base()); | |
151 | value_ = std::move(rhs.value_); | |
152 | return *this; | |
153 | } | |
154 | #endif | |
155 | ||
156 | Value value_; | |
157 | }; | |
158 | ||
159 | template<typename Elem, typename Key> | |
160 | struct keyed_element_value_at | |
161 | : keyed_element_value_at<typename Elem::base, Key> | |
162 | {}; | |
163 | ||
164 | template<typename Key, typename Value, typename Rest> | |
165 | struct keyed_element_value_at<keyed_element<Key, Value, Rest>, Key> | |
166 | { | |
167 | typedef Value type; | |
168 | }; | |
169 | }}} | |
170 | ||
171 | #endif |