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1 | // -*- C++ -*- |
---|---|
2 | //===----------------------------------------------------------------------===// |
3 | // |
4 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
5 | // See https://llvm.org/LICENSE.txt for license information. |
6 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
7 | // |
8 | //===----------------------------------------------------------------------===// |
9 | |
10 | #ifndef _LIBCPP___CXX03___ITERATOR_WRAP_ITER_H |
11 | #define _LIBCPP___CXX03___ITERATOR_WRAP_ITER_H |
12 | |
13 | #include <__cxx03/__config> |
14 | #include <__cxx03/__iterator/iterator_traits.h> |
15 | #include <__cxx03/__memory/addressof.h> |
16 | #include <__cxx03/__memory/pointer_traits.h> |
17 | #include <__cxx03/__type_traits/enable_if.h> |
18 | #include <__cxx03/__type_traits/is_convertible.h> |
19 | #include <__cxx03/cstddef> |
20 | |
21 | #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
22 | # pragma GCC system_header |
23 | #endif |
24 | |
25 | _LIBCPP_BEGIN_NAMESPACE_STD |
26 | |
27 | template <class _Iter> |
28 | class __wrap_iter { |
29 | public: |
30 | typedef _Iter iterator_type; |
31 | typedef typename iterator_traits<iterator_type>::value_type value_type; |
32 | typedef typename iterator_traits<iterator_type>::difference_type difference_type; |
33 | typedef typename iterator_traits<iterator_type>::pointer pointer; |
34 | typedef typename iterator_traits<iterator_type>::reference reference; |
35 | typedef typename iterator_traits<iterator_type>::iterator_category iterator_category; |
36 | |
37 | private: |
38 | iterator_type __i_; |
39 | |
40 | public: |
41 | _LIBCPP_HIDE_FROM_ABI __wrap_iter() _NOEXCEPT : __i_() {} |
42 | template <class _Up, __enable_if_t<is_convertible<_Up, iterator_type>::value, int> = 0> |
43 | _LIBCPP_HIDE_FROM_ABI __wrap_iter(const __wrap_iter<_Up>& __u) _NOEXCEPT : __i_(__u.base()) {} |
44 | _LIBCPP_HIDE_FROM_ABI reference operator*() const _NOEXCEPT { return *__i_; } |
45 | _LIBCPP_HIDE_FROM_ABI pointer operator->() const _NOEXCEPT { return std::__to_address(__i_); } |
46 | _LIBCPP_HIDE_FROM_ABI __wrap_iter& operator++() _NOEXCEPT { |
47 | ++__i_; |
48 | return *this; |
49 | } |
50 | _LIBCPP_HIDE_FROM_ABI __wrap_iter operator++(int) _NOEXCEPT { |
51 | __wrap_iter __tmp(*this); |
52 | ++(*this); |
53 | return __tmp; |
54 | } |
55 | |
56 | _LIBCPP_HIDE_FROM_ABI __wrap_iter& operator--() _NOEXCEPT { |
57 | --__i_; |
58 | return *this; |
59 | } |
60 | _LIBCPP_HIDE_FROM_ABI __wrap_iter operator--(int) _NOEXCEPT { |
61 | __wrap_iter __tmp(*this); |
62 | --(*this); |
63 | return __tmp; |
64 | } |
65 | _LIBCPP_HIDE_FROM_ABI __wrap_iter operator+(difference_type __n) const _NOEXCEPT { |
66 | __wrap_iter __w(*this); |
67 | __w += __n; |
68 | return __w; |
69 | } |
70 | _LIBCPP_HIDE_FROM_ABI __wrap_iter& operator+=(difference_type __n) _NOEXCEPT { |
71 | __i_ += __n; |
72 | return *this; |
73 | } |
74 | _LIBCPP_HIDE_FROM_ABI __wrap_iter operator-(difference_type __n) const _NOEXCEPT { return *this + (-__n); } |
75 | _LIBCPP_HIDE_FROM_ABI __wrap_iter& operator-=(difference_type __n) _NOEXCEPT { |
76 | *this += -__n; |
77 | return *this; |
78 | } |
79 | _LIBCPP_HIDE_FROM_ABI reference operator[](difference_type __n) const _NOEXCEPT { return __i_[__n]; } |
80 | |
81 | _LIBCPP_HIDE_FROM_ABI iterator_type base() const _NOEXCEPT { return __i_; } |
82 | |
83 | private: |
84 | _LIBCPP_HIDE_FROM_ABI explicit __wrap_iter(iterator_type __x) _NOEXCEPT : __i_(__x) {} |
85 | |
86 | template <class _Up> |
87 | friend class __wrap_iter; |
88 | template <class _CharT, class _Traits, class _Alloc> |
89 | friend class basic_string; |
90 | template <class _CharT, class _Traits> |
91 | friend class basic_string_view; |
92 | template <class _Tp, class _Alloc> |
93 | friend class _LIBCPP_TEMPLATE_VIS vector; |
94 | template <class _Tp, size_t> |
95 | friend class _LIBCPP_TEMPLATE_VIS span; |
96 | template <class _Tp, size_t _Size> |
97 | friend struct array; |
98 | }; |
99 | |
100 | template <class _Iter1> |
101 | _LIBCPP_HIDE_FROM_ABI bool operator==(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT { |
102 | return __x.base() == __y.base(); |
103 | } |
104 | |
105 | template <class _Iter1, class _Iter2> |
106 | _LIBCPP_HIDE_FROM_ABI bool operator==(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT { |
107 | return __x.base() == __y.base(); |
108 | } |
109 | |
110 | template <class _Iter1> |
111 | _LIBCPP_HIDE_FROM_ABI bool operator<(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT { |
112 | return __x.base() < __y.base(); |
113 | } |
114 | |
115 | template <class _Iter1, class _Iter2> |
116 | _LIBCPP_HIDE_FROM_ABI bool operator<(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT { |
117 | return __x.base() < __y.base(); |
118 | } |
119 | |
120 | template <class _Iter1> |
121 | _LIBCPP_HIDE_FROM_ABI bool operator!=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT { |
122 | return !(__x == __y); |
123 | } |
124 | |
125 | template <class _Iter1, class _Iter2> |
126 | _LIBCPP_HIDE_FROM_ABI bool operator!=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT { |
127 | return !(__x == __y); |
128 | } |
129 | |
130 | // TODO(mordante) disable these overloads in the LLVM 20 release. |
131 | template <class _Iter1> |
132 | _LIBCPP_HIDE_FROM_ABI bool operator>(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT { |
133 | return __y < __x; |
134 | } |
135 | |
136 | template <class _Iter1, class _Iter2> |
137 | _LIBCPP_HIDE_FROM_ABI bool operator>(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT { |
138 | return __y < __x; |
139 | } |
140 | |
141 | template <class _Iter1> |
142 | _LIBCPP_HIDE_FROM_ABI bool operator>=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT { |
143 | return !(__x < __y); |
144 | } |
145 | |
146 | template <class _Iter1, class _Iter2> |
147 | _LIBCPP_HIDE_FROM_ABI bool operator>=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT { |
148 | return !(__x < __y); |
149 | } |
150 | |
151 | template <class _Iter1> |
152 | _LIBCPP_HIDE_FROM_ABI bool operator<=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT { |
153 | return !(__y < __x); |
154 | } |
155 | |
156 | template <class _Iter1, class _Iter2> |
157 | _LIBCPP_HIDE_FROM_ABI bool operator<=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT { |
158 | return !(__y < __x); |
159 | } |
160 | |
161 | template <class _Iter1, class _Iter2> |
162 | _LIBCPP_HIDE_FROM_ABI typename __wrap_iter<_Iter1>::difference_type |
163 | operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT { |
164 | return __x.base() - __y.base(); |
165 | } |
166 | |
167 | template <class _Iter1> |
168 | _LIBCPP_HIDE_FROM_ABI __wrap_iter<_Iter1> |
169 | operator+(typename __wrap_iter<_Iter1>::difference_type __n, __wrap_iter<_Iter1> __x) _NOEXCEPT { |
170 | __x += __n; |
171 | return __x; |
172 | } |
173 | |
174 | template <class _It> |
175 | struct __libcpp_is_contiguous_iterator<__wrap_iter<_It> > : true_type {}; |
176 | |
177 | template <class _It> |
178 | struct _LIBCPP_TEMPLATE_VIS pointer_traits<__wrap_iter<_It> > { |
179 | typedef __wrap_iter<_It> pointer; |
180 | typedef typename pointer_traits<_It>::element_type element_type; |
181 | typedef typename pointer_traits<_It>::difference_type difference_type; |
182 | |
183 | _LIBCPP_HIDE_FROM_ABI static element_type* to_address(pointer __w) _NOEXCEPT { return std::__to_address(__w.base()); } |
184 | }; |
185 | |
186 | _LIBCPP_END_NAMESPACE_STD |
187 | |
188 | #endif // _LIBCPP___CXX03___ITERATOR_WRAP_ITER_H |
189 |
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