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1//===----------------------------------------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#ifndef _LIBCPP___ITERATOR_ITERATOR_WITH_DATA_H
10#define _LIBCPP___ITERATOR_ITERATOR_WITH_DATA_H
11
12#include <__compare/compare_three_way_result.h>
13#include <__compare/three_way_comparable.h>
14#include <__config>
15#include <__iterator/concepts.h>
16#include <__iterator/incrementable_traits.h>
17#include <__iterator/iter_move.h>
18#include <__iterator/iter_swap.h>
19#include <__iterator/iterator_traits.h>
20#include <__iterator/readable_traits.h>
21#include <__utility/move.h>
22
23#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
24# pragma GCC system_header
25#endif
26
27_LIBCPP_PUSH_MACROS
28#include <__undef_macros>
29
30#if _LIBCPP_STD_VER >= 20
31
32_LIBCPP_BEGIN_NAMESPACE_STD
33
34template <forward_iterator _Iterator, class _Data>
35class __iterator_with_data {
36 _Iterator __iter_{};
37 _Data __data_{};
38
39public:
40 using value_type = iter_value_t<_Iterator>;
41 using difference_type = iter_difference_t<_Iterator>;
42
43 _LIBCPP_HIDE_FROM_ABI __iterator_with_data() = default;
44
45 constexpr _LIBCPP_HIDE_FROM_ABI __iterator_with_data(_Iterator __iter, _Data __data)
46 : __iter_(std::move(__iter)), __data_(std::move(__data)) {}
47
48 constexpr _LIBCPP_HIDE_FROM_ABI _Iterator __get_iter() const { return __iter_; }
49
50 constexpr _LIBCPP_HIDE_FROM_ABI _Data __get_data() && { return std::move(__data_); }
51
52 friend constexpr _LIBCPP_HIDE_FROM_ABI bool
53 operator==(const __iterator_with_data& __lhs, const __iterator_with_data& __rhs) {
54 return __lhs.__iter_ == __rhs.__iter_;
55 }
56
57 constexpr _LIBCPP_HIDE_FROM_ABI __iterator_with_data& operator++() {
58 ++__iter_;
59 return *this;
60 }
61
62 constexpr _LIBCPP_HIDE_FROM_ABI __iterator_with_data operator++(int) {
63 auto __tmp = *this;
64 __iter_++;
65 return __tmp;
66 }
67
68 constexpr _LIBCPP_HIDE_FROM_ABI __iterator_with_data& operator--()
69 requires bidirectional_iterator<_Iterator>
70 {
71 --__iter_;
72 return *this;
73 }
74
75 constexpr _LIBCPP_HIDE_FROM_ABI __iterator_with_data operator--(int)
76 requires bidirectional_iterator<_Iterator>
77 {
78 auto __tmp = *this;
79 --__iter_;
80 return __tmp;
81 }
82
83 constexpr _LIBCPP_HIDE_FROM_ABI iter_reference_t<_Iterator> operator*() const { return *__iter_; }
84
85 _LIBCPP_HIDE_FROM_ABI friend constexpr iter_rvalue_reference_t<_Iterator>
86 iter_move(const __iterator_with_data& __iter) noexcept(noexcept(ranges::iter_move(__iter.__iter_))) {
87 return ranges::iter_move(__iter.__iter_);
88 }
89
90 _LIBCPP_HIDE_FROM_ABI friend constexpr void
91 iter_swap(const __iterator_with_data& __lhs,
92 const __iterator_with_data& __rhs) noexcept(noexcept(ranges::iter_swap(__lhs.__iter_, __rhs.__iter_)))
93 requires indirectly_swappable<_Iterator>
94 {
95 return ranges::iter_swap(__lhs.__data_, __rhs.__iter_);
96 }
97};
98
99_LIBCPP_END_NAMESPACE_STD
100
101#endif // _LIBCPP_STD_VER >= 20
102
103_LIBCPP_POP_MACROS
104
105#endif // _LIBCPP___ITERATOR_ITERATOR_WITH_DATA_H
106

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source code of libcxx/include/__iterator/iterator_with_data.h