[44] | 1 | // Copyright (C) 2002 Brad King (brad.king@kitware.com) |
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| 2 | // Douglas Gregor (gregod@cs.rpi.edu) |
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| 3 | // |
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| 4 | // Copyright (C) 2002, 2008 Peter Dimov |
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| 5 | // |
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| 6 | // Distributed under the Boost Software License, Version 1.0. (See |
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| 7 | // accompanying file LICENSE_1_0.txt or copy at |
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| 8 | // http://www.boost.org/LICENSE_1_0.txt) |
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| 9 | |
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| 10 | // For more information, see http://www.boost.org |
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| 11 | |
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| 12 | #ifndef BOOST_UTILITY_ADDRESSOF_HPP |
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| 13 | # define BOOST_UTILITY_ADDRESSOF_HPP |
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| 14 | |
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| 15 | # include <boost/config.hpp> |
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| 16 | # include <boost/detail/workaround.hpp> |
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| 17 | |
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| 18 | namespace boost |
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| 19 | { |
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| 20 | |
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| 21 | namespace detail |
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| 22 | { |
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| 23 | |
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| 24 | template<class T> struct addr_impl_ref |
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| 25 | { |
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| 26 | T & v_; |
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| 27 | |
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| 28 | inline addr_impl_ref( T & v ): v_( v ) {} |
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| 29 | inline operator T& () const { return v_; } |
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| 30 | |
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| 31 | private: |
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| 32 | addr_impl_ref & operator=(const addr_impl_ref &); |
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| 33 | }; |
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| 34 | |
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| 35 | template<class T> struct addressof_impl |
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| 36 | { |
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| 37 | static inline T * f( T & v, long ) |
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| 38 | { |
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| 39 | return reinterpret_cast<T*>( |
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| 40 | &const_cast<char&>(reinterpret_cast<const volatile char &>(v))); |
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| 41 | } |
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| 42 | |
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| 43 | static inline T * f( T * v, int ) |
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| 44 | { |
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| 45 | return v; |
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| 46 | } |
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| 47 | }; |
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| 48 | |
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| 49 | } // namespace detail |
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| 50 | |
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| 51 | template<class T> T * addressof( T & v ) |
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| 52 | { |
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| 53 | #if defined( __BORLANDC__ ) && BOOST_WORKAROUND( __BORLANDC__, BOOST_TESTED_AT( 0x610 ) ) |
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| 54 | |
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| 55 | return boost::detail::addressof_impl<T>::f( v, 0 ); |
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| 56 | |
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| 57 | #else |
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| 58 | |
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| 59 | return boost::detail::addressof_impl<T>::f( boost::detail::addr_impl_ref<T>( v ), 0 ); |
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| 60 | |
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| 61 | #endif |
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| 62 | } |
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| 63 | |
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| 64 | #if defined( __SUNPRO_CC ) && BOOST_WORKAROUND( __SUNPRO_CC, BOOST_TESTED_AT( 0x590 ) ) |
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| 65 | |
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| 66 | namespace detail |
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| 67 | { |
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| 68 | |
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| 69 | template<class T> struct addressof_addp |
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| 70 | { |
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| 71 | typedef T * type; |
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| 72 | }; |
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| 73 | |
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| 74 | } // namespace detail |
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| 75 | |
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| 76 | template< class T, std::size_t N > |
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| 77 | typename detail::addressof_addp< T[N] >::type addressof( T (&t)[N] ) |
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| 78 | { |
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| 79 | return &t; |
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| 80 | } |
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| 81 | |
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| 82 | #endif |
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| 83 | |
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| 84 | // Borland doesn't like casting an array reference to a char reference |
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| 85 | // but these overloads work around the problem. |
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| 86 | #if defined( __BORLANDC__ ) && BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564)) |
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| 87 | template<typename T,std::size_t N> |
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| 88 | T (*addressof(T (&t)[N]))[N] |
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| 89 | { |
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| 90 | return reinterpret_cast<T(*)[N]>(&t); |
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| 91 | } |
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| 92 | |
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| 93 | template<typename T,std::size_t N> |
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| 94 | const T (*addressof(const T (&t)[N]))[N] |
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| 95 | { |
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| 96 | return reinterpret_cast<const T(*)[N]>(&t); |
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| 97 | } |
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| 98 | #endif |
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| 99 | |
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| 100 | } // namespace boost |
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| 101 | |
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| 102 | #endif // BOOST_UTILITY_ADDRESSOF_HPP |
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