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1 /* |
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2 * |
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3 * Copyright (c) 1998-2002 |
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4 * John Maddock |
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5 * |
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6 * Use, modification and distribution are subject to the |
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7 * Boost Software License, Version 1.0. (See accompanying file |
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8 * LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
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9 * |
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10 */ |
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11 |
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12 /* |
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13 * LOCATION: see http://www.boost.org for most recent version. |
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14 * FILE iterator_traits.cpp |
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15 * VERSION see <boost/version.hpp> |
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16 * DESCRIPTION: Declares iterator traits workarounds. |
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17 */ |
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18 |
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19 #ifndef BOOST_REGEX_V4_ITERATOR_TRAITS_HPP |
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20 #define BOOST_REGEX_V4_ITERATOR_TRAITS_HPP |
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21 |
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22 #ifdef BOOST_MSVC |
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23 #pragma warning(push) |
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24 #pragma warning(disable: 4103) |
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25 #endif |
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26 #ifdef BOOST_HAS_ABI_HEADERS |
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27 # include BOOST_ABI_PREFIX |
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28 #endif |
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29 #ifdef BOOST_MSVC |
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30 #pragma warning(pop) |
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31 #endif |
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32 |
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33 namespace boost{ |
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34 namespace re_detail{ |
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35 |
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36 #if defined(BOOST_NO_STD_ITERATOR_TRAITS) || defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) |
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37 |
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38 template <class T> |
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39 struct regex_iterator_traits |
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40 { |
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41 typedef typename T::iterator_category iterator_category; |
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42 typedef typename T::value_type value_type; |
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43 #if !defined(BOOST_NO_STD_ITERATOR) |
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44 typedef typename T::difference_type difference_type; |
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45 typedef typename T::pointer pointer; |
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46 typedef typename T::reference reference; |
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47 #else |
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48 typedef std::ptrdiff_t difference_type; |
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49 typedef value_type* pointer; |
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50 typedef value_type& reference; |
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51 #endif |
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52 }; |
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53 |
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54 template <class T> |
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55 struct pointer_iterator_traits |
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56 { |
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57 typedef std::ptrdiff_t difference_type; |
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58 typedef T value_type; |
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59 typedef T* pointer; |
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60 typedef T& reference; |
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61 typedef std::random_access_iterator_tag iterator_category; |
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62 }; |
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63 template <class T> |
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64 struct const_pointer_iterator_traits |
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65 { |
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66 typedef std::ptrdiff_t difference_type; |
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67 typedef T value_type; |
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68 typedef const T* pointer; |
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69 typedef const T& reference; |
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70 typedef std::random_access_iterator_tag iterator_category; |
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71 }; |
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72 |
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73 template<> |
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74 struct regex_iterator_traits<char*> : pointer_iterator_traits<char>{}; |
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75 template<> |
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76 struct regex_iterator_traits<const char*> : const_pointer_iterator_traits<char>{}; |
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77 template<> |
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78 struct regex_iterator_traits<wchar_t*> : pointer_iterator_traits<wchar_t>{}; |
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79 template<> |
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80 struct regex_iterator_traits<const wchar_t*> : const_pointer_iterator_traits<wchar_t>{}; |
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81 // |
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82 // the follwoing are needed for ICU support: |
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83 // |
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84 template<> |
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85 struct regex_iterator_traits<unsigned char*> : pointer_iterator_traits<char>{}; |
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86 template<> |
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87 struct regex_iterator_traits<const unsigned char*> : const_pointer_iterator_traits<char>{}; |
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88 template<> |
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89 struct regex_iterator_traits<int*> : pointer_iterator_traits<int>{}; |
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90 template<> |
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91 struct regex_iterator_traits<const int*> : const_pointer_iterator_traits<int>{}; |
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92 |
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93 #ifdef BOOST_REGEX_HAS_OTHER_WCHAR_T |
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94 template<> |
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95 struct regex_iterator_traits<unsigned short*> : pointer_iterator_traits<unsigned short>{}; |
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96 template<> |
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97 struct regex_iterator_traits<const unsigned short*> : const_pointer_iterator_traits<unsigned short>{}; |
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98 #endif |
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99 |
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100 #if defined(__SGI_STL_PORT) && defined(__STL_DEBUG) |
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101 template<> |
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102 struct regex_iterator_traits<std::string::iterator> : pointer_iterator_traits<char>{}; |
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103 template<> |
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104 struct regex_iterator_traits<std::string::const_iterator> : const_pointer_iterator_traits<char>{}; |
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105 #ifndef BOOST_NO_STD_WSTRING |
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106 template<> |
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107 struct regex_iterator_traits<std::wstring::iterator> : pointer_iterator_traits<wchar_t>{}; |
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108 template<> |
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109 struct regex_iterator_traits<std::wstring::const_iterator> : const_pointer_iterator_traits<wchar_t>{}; |
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110 #endif // BOOST_NO_WSTRING |
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111 #endif // stport |
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112 |
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113 #else |
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114 |
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115 template <class T> |
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116 struct regex_iterator_traits : public std::iterator_traits<T> {}; |
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117 |
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118 #endif |
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119 |
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120 } // namespace re_detail |
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121 } // namespace boost |
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122 |
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123 #ifdef BOOST_MSVC |
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124 #pragma warning(push) |
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125 #pragma warning(disable: 4103) |
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126 #endif |
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127 #ifdef BOOST_HAS_ABI_HEADERS |
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128 # include BOOST_ABI_SUFFIX |
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129 #endif |
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130 #ifdef BOOST_MSVC |
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131 #pragma warning(pop) |
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132 #endif |
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133 |
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134 #endif |
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135 |