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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___FILESYSTEM_RECURSIVE_DIRECTORY_ITERATOR_H
11#define _LIBCPP___FILESYSTEM_RECURSIVE_DIRECTORY_ITERATOR_H
12
13#include <__config>
14#include <__filesystem/directory_entry.h>
15#include <__filesystem/directory_options.h>
16#include <__filesystem/path.h>
17#include <__iterator/default_sentinel.h>
18#include <__iterator/iterator_traits.h>
19#include <__memory/shared_ptr.h>
20#include <__ranges/enable_borrowed_range.h>
21#include <__ranges/enable_view.h>
22#include <__system_error/error_code.h>
23#include <__utility/move.h>
24
25#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
26# pragma GCC system_header
27#endif
28
29_LIBCPP_PUSH_MACROS
30#include <__undef_macros>
31
32#if _LIBCPP_STD_VER >= 17 && _LIBCPP_HAS_FILESYSTEM
33
34_LIBCPP_BEGIN_NAMESPACE_FILESYSTEM
35
36_LIBCPP_AVAILABILITY_FILESYSTEM_LIBRARY_PUSH
37
38class recursive_directory_iterator {
39public:
40 using value_type = directory_entry;
41 using difference_type = ptrdiff_t;
42 using pointer = directory_entry const*;
43 using reference = directory_entry const&;
44 using iterator_category = input_iterator_tag;
45
46public:
47 // constructors and destructor
48 _LIBCPP_HIDE_FROM_ABI recursive_directory_iterator() noexcept : __rec_(false) {}
49
50 _LIBCPP_HIDE_FROM_ABI explicit recursive_directory_iterator(
51 const path& __p, directory_options __xoptions = directory_options::none)
52 : recursive_directory_iterator(__p, __xoptions, nullptr) {}
53
54 _LIBCPP_HIDE_FROM_ABI recursive_directory_iterator(const path& __p, directory_options __xoptions, error_code& __ec)
55 : recursive_directory_iterator(__p, __xoptions, &__ec) {}
56
57 _LIBCPP_HIDE_FROM_ABI recursive_directory_iterator(const path& __p, error_code& __ec)
58 : recursive_directory_iterator(__p, directory_options::none, &__ec) {}
59
60 _LIBCPP_HIDE_FROM_ABI recursive_directory_iterator(const recursive_directory_iterator&) = default;
61 _LIBCPP_HIDE_FROM_ABI recursive_directory_iterator(recursive_directory_iterator&&) = default;
62
63 _LIBCPP_HIDE_FROM_ABI recursive_directory_iterator& operator=(const recursive_directory_iterator&) = default;
64
65 _LIBCPP_HIDE_FROM_ABI recursive_directory_iterator& operator=(recursive_directory_iterator&& __o) noexcept {
66 // non-default implementation provided to support self-move assign.
67 if (this != &__o) {
68 __imp_ = std::move(__o.__imp_);
69 __rec_ = __o.__rec_;
70 }
71 return *this;
72 }
73
74 _LIBCPP_HIDE_FROM_ABI ~recursive_directory_iterator() = default;
75
76 _LIBCPP_HIDE_FROM_ABI const directory_entry& operator*() const { return __dereference(); }
77
78 _LIBCPP_HIDE_FROM_ABI const directory_entry* operator->() const { return &__dereference(); }
79
80 _LIBCPP_HIDE_FROM_ABI recursive_directory_iterator& operator++() { return __increment(); }
81
82 _LIBCPP_HIDE_FROM_ABI __dir_element_proxy operator++(int) {
83 __dir_element_proxy __p(**this);
84 __increment();
85 return __p;
86 }
87
88 _LIBCPP_HIDE_FROM_ABI recursive_directory_iterator& increment(error_code& __ec) { return __increment(&__ec); }
89
90 _LIBCPP_EXPORTED_FROM_ABI directory_options options() const;
91 _LIBCPP_EXPORTED_FROM_ABI int depth() const;
92
93 _LIBCPP_HIDE_FROM_ABI void pop() { __pop(); }
94
95 _LIBCPP_HIDE_FROM_ABI void pop(error_code& __ec) { __pop(&__ec); }
96
97 _LIBCPP_HIDE_FROM_ABI bool recursion_pending() const { return __rec_; }
98
99 _LIBCPP_HIDE_FROM_ABI void disable_recursion_pending() { __rec_ = false; }
100
101# if _LIBCPP_STD_VER >= 20
102
103 _LIBCPP_HIDE_FROM_ABI bool operator==(default_sentinel_t) const noexcept {
104 return *this == recursive_directory_iterator();
105 }
106
107# endif
108
109private:
110 _LIBCPP_EXPORTED_FROM_ABI recursive_directory_iterator(const path& __p, directory_options __opt, error_code* __ec);
111 _LIBCPP_EXPORTED_FROM_ABI const directory_entry& __dereference() const;
112 _LIBCPP_EXPORTED_FROM_ABI bool __try_recursion(error_code* __ec);
113 _LIBCPP_EXPORTED_FROM_ABI void __advance(error_code* __ec = nullptr);
114 _LIBCPP_EXPORTED_FROM_ABI recursive_directory_iterator& __increment(error_code* __ec = nullptr);
115 _LIBCPP_EXPORTED_FROM_ABI void __pop(error_code* __ec = nullptr);
116
117 inline _LIBCPP_HIDE_FROM_ABI friend bool
118 operator==(const recursive_directory_iterator&, const recursive_directory_iterator&) noexcept;
119
120 struct _LIBCPP_HIDDEN __shared_imp;
121 shared_ptr<__shared_imp> __imp_;
122 bool __rec_;
123}; // class recursive_directory_iterator
124
125inline _LIBCPP_HIDE_FROM_ABI bool
126operator==(const recursive_directory_iterator& __lhs, const recursive_directory_iterator& __rhs) noexcept {
127 return __lhs.__imp_ == __rhs.__imp_;
128}
129
130_LIBCPP_HIDE_FROM_ABI inline bool
131operator!=(const recursive_directory_iterator& __lhs, const recursive_directory_iterator& __rhs) noexcept {
132 return !(__lhs == __rhs);
133}
134// enable recursive_directory_iterator range-based for statements
135inline _LIBCPP_HIDE_FROM_ABI recursive_directory_iterator begin(recursive_directory_iterator __iter) noexcept {
136 return __iter;
137}
138
139inline _LIBCPP_HIDE_FROM_ABI recursive_directory_iterator end(recursive_directory_iterator) noexcept {
140 return recursive_directory_iterator();
141}
142
143_LIBCPP_AVAILABILITY_FILESYSTEM_LIBRARY_POP
144
145_LIBCPP_END_NAMESPACE_FILESYSTEM
146
147# if _LIBCPP_STD_VER >= 20
148
149template <>
150_LIBCPP_AVAILABILITY_FILESYSTEM_LIBRARY inline constexpr bool
151 std::ranges::enable_borrowed_range<std::filesystem::recursive_directory_iterator> = true;
152
153template <>
154_LIBCPP_AVAILABILITY_FILESYSTEM_LIBRARY inline constexpr bool
155 std::ranges::enable_view<std::filesystem::recursive_directory_iterator> = true;
156
157# endif // _LIBCPP_STD_VER >= 20
158
159#endif // _LIBCPP_STD_VER >= 17 && _LIBCPP_HAS_FILESYSTEM
160
161_LIBCPP_POP_MACROS
162
163#endif // _LIBCPP___FILESYSTEM_RECURSIVE_DIRECTORY_ITERATOR_H
164

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source code of libcxx/include/__filesystem/recursive_directory_iterator.h