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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