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| 4680 | right-hear | 1 | /* |
| 2 | * |
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| 3 | * Copyright (c) 1994 |
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| 4 | * Hewlett-Packard Company |
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| 5 | * |
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| 6 | * Permission to use, copy, modify, distribute and sell this software |
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| 7 | * and its documentation for any purpose is hereby granted without fee, |
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| 8 | * provided that the above copyright notice appear in all copies and |
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| 9 | * that both that copyright notice and this permission notice appear |
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| 10 | * in supporting documentation. Hewlett-Packard Company makes no |
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| 11 | * representations about the suitability of this software for any |
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| 12 | * purpose. It is provided "as is" without express or implied warranty. |
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| 13 | * |
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| 14 | * |
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| 15 | * Copyright (c) 1996-1998 |
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| 16 | * Silicon Graphics Computer Systems, Inc. |
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| 17 | * |
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| 18 | * Permission to use, copy, modify, distribute and sell this software |
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| 19 | * and its documentation for any purpose is hereby granted without fee, |
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| 20 | * provided that the above copyright notice appear in all copies and |
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| 21 | * that both that copyright notice and this permission notice appear |
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| 22 | * in supporting documentation. Silicon Graphics makes no |
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| 23 | * representations about the suitability of this software for any |
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| 24 | * purpose. It is provided "as is" without express or implied warranty. |
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| 25 | */ |
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| 26 | |||
| 27 | /* NOTE: This is an internal header file, included by other STL headers. |
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| 28 | * You should not attempt to use it directly. |
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| 29 | */ |
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| 30 | |||
| 31 | #ifndef __SGI_STL_INTERNAL_ITERATOR_BASE_TYPES_H |
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| 32 | #define __SGI_STL_INTERNAL_ITERATOR_BASE_TYPES_H |
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| 33 | |||
| 34 | // This file contains all of the general iterator-related utility |
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| 35 | // types, such as iterator_traits and struct iterator. |
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| 36 | // The internal file stl_iterator.h contains predefined iterators, |
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| 37 | // such as front_insert_iterator and istream_iterator. |
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| 38 | |||
| 39 | #pragma GCC system_header |
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| 40 | |||
| 41 | namespace std |
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| 42 | { |
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| 43 | |||
| 44 | struct input_iterator_tag {}; |
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| 45 | struct output_iterator_tag {}; |
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| 46 | struct forward_iterator_tag : public input_iterator_tag {}; |
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| 47 | struct bidirectional_iterator_tag : public forward_iterator_tag {}; |
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| 48 | struct random_access_iterator_tag : public bidirectional_iterator_tag {}; |
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| 49 | |||
| 50 | // The base classes input_iterator, output_iterator, forward_iterator, |
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| 51 | // bidirectional_iterator, and random_access_iterator are not part of |
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| 52 | // the C++ standard. (They have been replaced by struct iterator.) |
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| 53 | // They are included for backward compatibility with the HP STL. |
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| 54 | |||
| 55 | template |
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| 56 | typedef input_iterator_tag iterator_category; |
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| 57 | typedef _Tp value_type; |
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| 58 | typedef _Distance difference_type; |
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| 59 | typedef _Tp* pointer; |
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| 60 | typedef _Tp& reference; |
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| 61 | }; |
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| 62 | |||
| 63 | struct output_iterator { |
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| 64 | typedef output_iterator_tag iterator_category; |
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| 65 | typedef void value_type; |
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| 66 | typedef void difference_type; |
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| 67 | typedef void pointer; |
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| 68 | typedef void reference; |
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| 69 | }; |
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| 70 | |||
| 71 | template |
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| 72 | typedef forward_iterator_tag iterator_category; |
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| 73 | typedef _Tp value_type; |
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| 74 | typedef _Distance difference_type; |
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| 75 | typedef _Tp* pointer; |
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| 76 | typedef _Tp& reference; |
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| 77 | }; |
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| 78 | |||
| 79 | |||
| 80 | template |
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| 81 | typedef bidirectional_iterator_tag iterator_category; |
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| 82 | typedef _Tp value_type; |
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| 83 | typedef _Distance difference_type; |
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| 84 | typedef _Tp* pointer; |
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| 85 | typedef _Tp& reference; |
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| 86 | }; |
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| 87 | |||
| 88 | template |
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| 89 | typedef random_access_iterator_tag iterator_category; |
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| 90 | typedef _Tp value_type; |
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| 91 | typedef _Distance difference_type; |
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| 92 | typedef _Tp* pointer; |
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| 93 | typedef _Tp& reference; |
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| 94 | }; |
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| 95 | |||
| 96 | template |
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| 97 | class _Pointer = _Tp*, class _Reference = _Tp&> |
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| 98 | struct iterator { |
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| 99 | typedef _Category iterator_category; |
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| 100 | typedef _Tp value_type; |
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| 101 | typedef _Distance difference_type; |
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| 102 | typedef _Pointer pointer; |
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| 103 | typedef _Reference reference; |
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| 104 | }; |
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| 105 | |||
| 106 | template |
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| 107 | struct iterator_traits { |
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| 108 | typedef typename _Iterator::iterator_category iterator_category; |
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| 109 | typedef typename _Iterator::value_type value_type; |
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| 110 | typedef typename _Iterator::difference_type difference_type; |
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| 111 | typedef typename _Iterator::pointer pointer; |
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| 112 | typedef typename _Iterator::reference reference; |
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| 113 | }; |
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| 114 | |||
| 115 | template |
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| 116 | struct iterator_traits<_Tp*> { |
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| 117 | typedef random_access_iterator_tag iterator_category; |
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| 118 | typedef _Tp value_type; |
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| 119 | typedef ptrdiff_t difference_type; |
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| 120 | typedef _Tp* pointer; |
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| 121 | typedef _Tp& reference; |
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| 122 | }; |
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| 123 | |||
| 124 | template |
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| 125 | struct iterator_traits |
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| 126 | typedef random_access_iterator_tag iterator_category; |
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| 127 | typedef _Tp value_type; |
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| 128 | typedef ptrdiff_t difference_type; |
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| 129 | typedef const _Tp* pointer; |
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| 130 | typedef const _Tp& reference; |
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| 131 | }; |
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| 132 | |||
| 133 | // The overloaded functions iterator_category, distance_type, and |
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| 134 | // value_type are not part of the C++ standard. (They have been |
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| 135 | // replaced by struct iterator_traits.) They are included for |
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| 136 | // backward compatibility with the HP STL. |
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| 137 | |||
| 138 | // We introduce internal names for these functions. |
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| 139 | |||
| 140 | template |
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| 141 | inline typename iterator_traits<_Iter>::iterator_category |
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| 142 | __iterator_category(const _Iter&) |
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| 143 | { |
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| 144 | typedef typename iterator_traits<_Iter>::iterator_category _Category; |
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| 145 | return _Category(); |
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| 146 | } |
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| 147 | |||
| 148 | template |
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| 149 | inline typename iterator_traits<_Iter>::difference_type* |
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| 150 | __distance_type(const _Iter&) |
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| 151 | { |
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| 152 | return static_cast |
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| 153 | } |
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| 154 | |||
| 155 | template |
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| 156 | inline typename iterator_traits<_Iter>::value_type* |
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| 157 | __value_type(const _Iter&) |
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| 158 | { |
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| 159 | return static_cast |
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| 160 | } |
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| 161 | |||
| 162 | template |
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| 163 | inline typename iterator_traits<_Iter>::iterator_category |
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| 164 | iterator_category(const _Iter& __i) { return __iterator_category(__i); } |
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| 165 | |||
| 166 | |||
| 167 | template |
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| 168 | inline typename iterator_traits<_Iter>::difference_type* |
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| 169 | distance_type(const _Iter& __i) { return __distance_type(__i); } |
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| 170 | |||
| 171 | template |
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| 172 | inline typename iterator_traits<_Iter>::value_type* |
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| 173 | value_type(const _Iter& __i) { return __value_type(__i); } |
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| 174 | |||
| 175 | } // namespace std |
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| 176 | |||
| 177 | #endif /* __SGI_STL_INTERNAL_ITERATOR_BASE_TYPES_H */ |
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| 178 | |||
| 179 | |||
| 180 | // Local Variables: |
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| 181 | // mode:C++ |
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| 182 | // End: |