1 // Copyright (C) 2002 Brad King (brad.king@kitware.com)
2 // Douglas Gregor (gregod@cs.rpi.edu)
3 //
4 // Copyright (C) 2002, 2008 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_UTILITY_ADDRESSOF_HPP
13 # define BOOST_UTILITY_ADDRESSOF_HPP
14
15 # include <boost/config.hpp>
16 # include <boost/detail/workaround.hpp>
17
18 namespace boost
19 {
20
21 namespace detail
22 {
23
24 template<class T> struct addr_impl_ref
25 {
26 T & v_;
27
addr_impl_refboost::detail::addr_impl_ref28 inline addr_impl_ref( T & v ): v_( v ) {}
operator T&boost::detail::addr_impl_ref29 inline operator T& () const { return v_; }
30
31 private:
32 addr_impl_ref & operator=(const addr_impl_ref &);
33 };
34
35 template<class T> struct addressof_impl
36 {
fboost::detail::addressof_impl37 static inline T * f( T & v, long )
38 {
39 return reinterpret_cast<T*>(
40 &const_cast<char&>(reinterpret_cast<const volatile char &>(v)));
41 }
42
fboost::detail::addressof_impl43 static inline T * f( T * v, int )
44 {
45 return v;
46 }
47 };
48
49 } // namespace detail
50
addressof(T & v)51 template<class T> T * addressof( T & v )
52 {
53 #if defined( __BORLANDC__ ) && BOOST_WORKAROUND( __BORLANDC__, BOOST_TESTED_AT( 0x610 ) )
54
55 return boost::detail::addressof_impl<T>::f( v, 0 );
56
57 #else
58
59 return boost::detail::addressof_impl<T>::f( boost::detail::addr_impl_ref<T>( v ), 0 );
60
61 #endif
62 }
63
64 #if defined( __SUNPRO_CC ) && BOOST_WORKAROUND( __SUNPRO_CC, BOOST_TESTED_AT( 0x590 ) )
65
66 namespace detail
67 {
68
69 template<class T> struct addressof_addp
70 {
71 typedef T * type;
72 };
73
74 } // namespace detail
75
76 template< class T, std::size_t N >
addressof(T (& t)[N])77 typename detail::addressof_addp< T[N] >::type addressof( T (&t)[N] )
78 {
79 return &t;
80 }
81
82 #endif
83
84 // Borland doesn't like casting an array reference to a char reference
85 // but these overloads work around the problem.
86 #if defined( __BORLANDC__ ) && BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564))
87 template<typename T,std::size_t N>
88 T (*addressof(T (&t)[N]))[N]
__anon711352e00102null89 {
90 return reinterpret_cast<T(*)[N]>(&t);
91 }
92
93 template<typename T,std::size_t N>
94 const T (*addressof(const T (&t)[N]))[N]
__anon711352e00202null95 {
96 return reinterpret_cast<const T(*)[N]>(&t);
97 }
98 #endif
99
100 } // namespace boost
101
102 #endif // BOOST_UTILITY_ADDRESSOF_HPP
103