|
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 |
|
28 inline addr_impl_ref( T & v ): v_( v ) {} |
|
29 inline operator T& () const { return v_; } |
|
30 }; |
|
31 |
|
32 template<class T> struct addressof_impl |
|
33 { |
|
34 static inline T * f( T & v, long ) |
|
35 { |
|
36 return reinterpret_cast<T*>( |
|
37 &const_cast<char&>(reinterpret_cast<const volatile char &>(v))); |
|
38 } |
|
39 |
|
40 static inline T * f( T * v, int ) |
|
41 { |
|
42 return v; |
|
43 } |
|
44 }; |
|
45 |
|
46 } // namespace detail |
|
47 |
|
48 template<class T> T * addressof( T & v ) |
|
49 { |
|
50 #if defined( __BORLANDC__ ) && BOOST_WORKAROUND( __BORLANDC__, BOOST_TESTED_AT( 0x610 ) ) |
|
51 |
|
52 return boost::detail::addressof_impl<T>::f( v, 0 ); |
|
53 |
|
54 #else |
|
55 |
|
56 return boost::detail::addressof_impl<T>::f( boost::detail::addr_impl_ref<T>( v ), 0 ); |
|
57 |
|
58 #endif |
|
59 } |
|
60 |
|
61 #if defined( __SUNPRO_CC ) && BOOST_WORKAROUND( __SUNPRO_CC, BOOST_TESTED_AT( 0x590 ) ) |
|
62 |
|
63 namespace detail |
|
64 { |
|
65 |
|
66 template<class T> struct addressof_addp |
|
67 { |
|
68 typedef T * type; |
|
69 }; |
|
70 |
|
71 } // namespace detail |
|
72 |
|
73 template< class T, std::size_t N > |
|
74 typename detail::addressof_addp< T[N] >::type addressof( T (&t)[N] ) |
|
75 { |
|
76 return &t; |
|
77 } |
|
78 |
|
79 #endif |
|
80 |
|
81 // Borland doesn't like casting an array reference to a char reference |
|
82 // but these overloads work around the problem. |
|
83 #if defined( __BORLANDC__ ) && BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564)) |
|
84 template<typename T,std::size_t N> |
|
85 T (*addressof(T (&t)[N]))[N] |
|
86 { |
|
87 return reinterpret_cast<T(*)[N]>(&t); |
|
88 } |
|
89 |
|
90 template<typename T,std::size_t N> |
|
91 const T (*addressof(const T (&t)[N]))[N] |
|
92 { |
|
93 return reinterpret_cast<const T(*)[N]>(&t); |
|
94 } |
|
95 #endif |
|
96 |
|
97 } // namespace boost |
|
98 |
|
99 #endif // BOOST_UTILITY_ADDRESSOF_HPP |