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1 | // Copyright (C) 2002 Brad King (brad.king@kitware.com) |
2 | // Douglas Gregor (gregod@cs.rpi.edu) | |
3 | // | |
4 | // Copyright (C) 2002, 2008, 2013 Peter Dimov | |
5 | // | |
6 | // Distributed under the Boost Software License, Version 1.0. (See | |
7 | // accompanying file LICENSE_1_0.txt or copy at | |
8 | // http://www.boost.org/LICENSE_1_0.txt) | |
9 | ||
10 | // For more information, see http://www.boost.org | |
11 | ||
12 | #ifndef BOOST_CORE_ADDRESSOF_HPP | |
13 | #define BOOST_CORE_ADDRESSOF_HPP | |
14 | ||
15 | # include <boost/config.hpp> | |
16 | # include <boost/detail/workaround.hpp> | |
17 | # include <cstddef> | |
18 | ||
19 | namespace boost | |
20 | { | |
21 | ||
22 | namespace detail | |
23 | { | |
24 | ||
25 | template<class T> struct addr_impl_ref | |
26 | { | |
27 | T & v_; | |
28 | ||
29 | BOOST_FORCEINLINE addr_impl_ref( T & v ): v_( v ) {} | |
30 | BOOST_FORCEINLINE operator T& () const { return v_; } | |
31 | ||
32 | private: | |
33 | addr_impl_ref & operator=(const addr_impl_ref &); | |
34 | }; | |
35 | ||
36 | template<class T> struct addressof_impl | |
37 | { | |
38 | static BOOST_FORCEINLINE T * f( T & v, long ) | |
39 | { | |
40 | return reinterpret_cast<T*>( | |
41 | &const_cast<char&>(reinterpret_cast<const volatile char &>(v))); | |
42 | } | |
43 | ||
44 | static BOOST_FORCEINLINE T * f( T * v, int ) | |
45 | { | |
46 | return v; | |
47 | } | |
48 | }; | |
49 | ||
50 | #if !defined( BOOST_NO_CXX11_NULLPTR ) | |
51 | ||
52 | #if !defined( BOOST_NO_CXX11_DECLTYPE ) && ( ( defined( __clang__ ) && !defined( _LIBCPP_VERSION ) ) || defined( __INTEL_COMPILER ) ) | |
53 | ||
54 | typedef decltype(nullptr) addr_nullptr_t; | |
55 | ||
56 | #else | |
57 | ||
58 | typedef std::nullptr_t addr_nullptr_t; | |
59 | ||
60 | #endif | |
61 | ||
62 | template<> struct addressof_impl< addr_nullptr_t > | |
63 | { | |
64 | typedef addr_nullptr_t T; | |
65 | ||
66 | static BOOST_FORCEINLINE T * f( T & v, int ) | |
67 | { | |
68 | return &v; | |
69 | } | |
70 | }; | |
71 | ||
72 | template<> struct addressof_impl< addr_nullptr_t const > | |
73 | { | |
74 | typedef addr_nullptr_t const T; | |
75 | ||
76 | static BOOST_FORCEINLINE T * f( T & v, int ) | |
77 | { | |
78 | return &v; | |
79 | } | |
80 | }; | |
81 | ||
82 | template<> struct addressof_impl< addr_nullptr_t volatile > | |
83 | { | |
84 | typedef addr_nullptr_t volatile T; | |
85 | ||
86 | static BOOST_FORCEINLINE T * f( T & v, int ) | |
87 | { | |
88 | return &v; | |
89 | } | |
90 | }; | |
91 | ||
92 | template<> struct addressof_impl< addr_nullptr_t const volatile > | |
93 | { | |
94 | typedef addr_nullptr_t const volatile T; | |
95 | ||
96 | static BOOST_FORCEINLINE T * f( T & v, int ) | |
97 | { | |
98 | return &v; | |
99 | } | |
100 | }; | |
101 | ||
102 | #endif | |
103 | ||
104 | } // namespace detail | |
105 | ||
106 | template<class T> | |
107 | BOOST_FORCEINLINE | |
108 | T * addressof( T & v ) | |
109 | { | |
110 | #if (defined( __BORLANDC__ ) && BOOST_WORKAROUND( __BORLANDC__, BOOST_TESTED_AT( 0x610 ) ) ) || (defined(__SUNPRO_CC) && BOOST_WORKAROUND(__SUNPRO_CC, <= 0x5120)) | |
111 | ||
112 | return boost::detail::addressof_impl<T>::f( v, 0 ); | |
113 | ||
114 | #else | |
115 | ||
116 | return boost::detail::addressof_impl<T>::f( boost::detail::addr_impl_ref<T>( v ), 0 ); | |
117 | ||
118 | #endif | |
119 | } | |
120 | ||
121 | #if defined( __SUNPRO_CC ) && BOOST_WORKAROUND( __SUNPRO_CC, BOOST_TESTED_AT( 0x590 ) ) | |
122 | ||
123 | namespace detail | |
124 | { | |
125 | ||
126 | template<class T> struct addressof_addp | |
127 | { | |
128 | typedef T * type; | |
129 | }; | |
130 | ||
131 | } // namespace detail | |
132 | ||
133 | template< class T, std::size_t N > | |
134 | BOOST_FORCEINLINE | |
135 | typename detail::addressof_addp< T[N] >::type addressof( T (&t)[N] ) | |
136 | { | |
137 | return &t; | |
138 | } | |
139 | ||
140 | #endif | |
141 | ||
142 | // Borland doesn't like casting an array reference to a char reference | |
143 | // but these overloads work around the problem. | |
144 | #if defined( __BORLANDC__ ) && BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564)) | |
145 | template<typename T,std::size_t N> | |
146 | BOOST_FORCEINLINE | |
147 | T (*addressof(T (&t)[N]))[N] | |
148 | { | |
149 | return reinterpret_cast<T(*)[N]>(&t); | |
150 | } | |
151 | ||
152 | template<typename T,std::size_t N> | |
153 | BOOST_FORCEINLINE | |
154 | const T (*addressof(const T (&t)[N]))[N] | |
155 | { | |
156 | return reinterpret_cast<const T(*)[N]>(&t); | |
157 | } | |
158 | #endif | |
159 | ||
160 | } // namespace boost | |
161 | ||
162 | #endif // BOOST_CORE_ADDRESSOF_HPP |