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1 | ////////////////////////////////////////////////////////////////////////////// |
2 | // (C) Copyright John Maddock 2000. | |
3 | // (C) Copyright Ion Gaztanaga 2005-2012. | |
4 | // | |
5 | // Distributed under the Boost Software License, Version 1.0. | |
6 | // (See accompanying file LICENSE_1_0.txt or copy at | |
7 | // http://www.boost.org/LICENSE_1_0.txt) | |
8 | // | |
9 | // See http://www.boost.org/libs/interprocess for documentation. | |
10 | // | |
11 | ////////////////////////////////////////////////////////////////////////////// | |
12 | ||
13 | #ifndef BOOST_INTERPROCESS_DETAIL_TYPE_TRAITS_HPP | |
14 | #define BOOST_INTERPROCESS_DETAIL_TYPE_TRAITS_HPP | |
15 | ||
16 | #ifndef BOOST_CONFIG_HPP | |
17 | # include <boost/config.hpp> | |
18 | #endif | |
19 | # | |
20 | #if defined(BOOST_HAS_PRAGMA_ONCE) | |
21 | # pragma once | |
22 | #endif | |
23 | ||
24 | #include <boost/interprocess/detail/config_begin.hpp> | |
25 | ||
26 | namespace boost { | |
27 | namespace interprocess { | |
28 | namespace ipcdetail { | |
29 | ||
30 | struct nat{}; | |
31 | ||
32 | template<class T> | |
33 | struct remove_reference | |
34 | { | |
35 | typedef T type; | |
36 | }; | |
37 | ||
38 | template<class T> | |
39 | struct remove_reference<T&> | |
40 | { | |
41 | typedef T type; | |
42 | }; | |
43 | ||
44 | template<class T> | |
45 | struct is_reference | |
46 | { | |
47 | static const bool value = false; | |
48 | }; | |
49 | ||
50 | template<class T> | |
51 | struct is_reference<T&> | |
52 | { | |
53 | static const bool value = true; | |
54 | }; | |
55 | ||
56 | template<class T> | |
57 | struct is_pointer | |
58 | { | |
59 | static const bool value = false; | |
60 | }; | |
61 | ||
62 | template<class T> | |
63 | struct is_pointer<T*> | |
64 | { | |
65 | static const bool value = true; | |
66 | }; | |
67 | ||
68 | template <typename T> | |
69 | struct add_reference | |
70 | { | |
71 | typedef T& type; | |
72 | }; | |
73 | ||
74 | template<class T> | |
75 | struct add_reference<T&> | |
76 | { | |
77 | typedef T& type; | |
78 | }; | |
79 | ||
80 | template<> | |
81 | struct add_reference<void> | |
82 | { | |
83 | typedef nat &type; | |
84 | }; | |
85 | ||
86 | template<> | |
87 | struct add_reference<const void> | |
88 | { | |
89 | typedef const nat &type; | |
90 | }; | |
91 | ||
92 | template <class T> | |
93 | struct add_const_reference | |
94 | { typedef const T &type; }; | |
95 | ||
96 | template <class T> | |
97 | struct add_const_reference<T&> | |
98 | { typedef T& type; }; | |
99 | ||
100 | template<class T> | |
101 | struct remove_const | |
102 | { | |
103 | typedef T type; | |
104 | }; | |
105 | ||
106 | template<class T> | |
107 | struct remove_const<const T> | |
108 | { | |
109 | typedef T type; | |
110 | }; | |
111 | ||
112 | template<class T> | |
113 | struct remove_volatile | |
114 | { | |
115 | typedef T type; | |
116 | }; | |
117 | ||
118 | template<class T> | |
119 | struct remove_volatile<volatile T> | |
120 | { | |
121 | typedef T type; | |
122 | }; | |
123 | ||
124 | template<class T> | |
125 | struct remove_const_volatile | |
126 | { | |
127 | typedef typename remove_const<typename remove_volatile<T>::type>::type type; | |
128 | }; | |
129 | ||
130 | template <typename T, typename U> | |
131 | struct is_same | |
132 | { | |
133 | typedef char yes_type; | |
134 | struct no_type | |
135 | { | |
136 | char padding[8]; | |
137 | }; | |
138 | ||
139 | template <typename V> | |
140 | static yes_type is_same_tester(V*, V*); | |
141 | static no_type is_same_tester(...); | |
142 | ||
143 | static T *t; | |
144 | static U *u; | |
145 | ||
146 | static const bool value = sizeof(yes_type) == sizeof(is_same_tester(t,u)); | |
147 | }; | |
148 | ||
149 | template<class T, class U> | |
150 | struct is_cv_same | |
151 | { | |
152 | static const bool value = is_same< typename remove_const_volatile<T>::type | |
153 | , typename remove_const_volatile<U>::type >::value; | |
154 | }; | |
155 | ||
156 | } // namespace ipcdetail | |
157 | } //namespace interprocess { | |
158 | } //namespace boost { | |
159 | ||
160 | #include <boost/interprocess/detail/config_end.hpp> | |
161 | ||
162 | #endif //#ifndef BOOST_INTERPROCESS_DETAIL_TYPE_TRAITS_HPP |