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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-exception7//8//===----------------------------------------------------------------------===//9 10#ifndef _LIBCPP___FILESYSTEM_PATH_ITERATOR_H11#define _LIBCPP___FILESYSTEM_PATH_ITERATOR_H12 13#include <__assert>14#include <__config>15#include <__filesystem/path.h>16#include <__iterator/iterator_traits.h>17 18#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)19# pragma GCC system_header20#endif21 22#if _LIBCPP_STD_VER >= 1723 24_LIBCPP_BEGIN_NAMESPACE_FILESYSTEM25 26class _LIBCPP_EXPORTED_FROM_ABI path::iterator {27public:28 enum _ParserState : unsigned char {29 _Singular,30 _BeforeBegin,31 _InRootName,32 _InRootDir,33 _InFilenames,34 _InTrailingSep,35 _AtEnd36 };37 38public:39 typedef input_iterator_tag iterator_category;40 typedef bidirectional_iterator_tag iterator_concept;41 42 typedef path value_type;43 typedef ptrdiff_t difference_type;44 typedef const path* pointer;45 typedef path reference;46 47public:48 _LIBCPP_HIDE_FROM_ABI iterator() : __stashed_elem_(), __path_ptr_(nullptr), __entry_(), __state_(_Singular) {}49 50 _LIBCPP_HIDE_FROM_ABI iterator(const iterator&) = default;51 _LIBCPP_HIDE_FROM_ABI ~iterator() = default;52 53 _LIBCPP_HIDE_FROM_ABI iterator& operator=(const iterator&) = default;54 55 _LIBCPP_HIDE_FROM_ABI reference operator*() const { return __stashed_elem_; }56 57 _LIBCPP_HIDE_FROM_ABI pointer operator->() const { return &__stashed_elem_; }58 59 _LIBCPP_HIDE_FROM_ABI iterator& operator++() {60 _LIBCPP_ASSERT_NON_NULL(__state_ != _Singular, "attempting to increment a singular iterator");61 _LIBCPP_ASSERT_UNCATEGORIZED(__state_ != _AtEnd, "attempting to increment the end iterator");62 return __increment();63 }64 65 _LIBCPP_HIDE_FROM_ABI iterator operator++(int) {66 iterator __it(*this);67 this->operator++();68 return __it;69 }70 71 _LIBCPP_HIDE_FROM_ABI iterator& operator--() {72 _LIBCPP_ASSERT_NON_NULL(__state_ != _Singular, "attempting to decrement a singular iterator");73 _LIBCPP_ASSERT_UNCATEGORIZED(74 __entry_.data() != __path_ptr_->native().data(), "attempting to decrement the begin iterator");75 return __decrement();76 }77 78 _LIBCPP_HIDE_FROM_ABI iterator operator--(int) {79 iterator __it(*this);80 this->operator--();81 return __it;82 }83 84private:85 friend class path;86 87 inline _LIBCPP_HIDE_FROM_ABI friend bool operator==(const iterator&, const iterator&);88 89 iterator& __increment();90 iterator& __decrement();91 92 path __stashed_elem_;93 const path* __path_ptr_;94 path::__string_view __entry_;95 _ParserState __state_;96};97 98inline _LIBCPP_HIDE_FROM_ABI bool operator==(const path::iterator& __lhs, const path::iterator& __rhs) {99 return __lhs.__path_ptr_ == __rhs.__path_ptr_ && __lhs.__entry_.data() == __rhs.__entry_.data();100}101 102inline _LIBCPP_HIDE_FROM_ABI bool operator!=(const path::iterator& __lhs, const path::iterator& __rhs) {103 return !(__lhs == __rhs);104}105 106_LIBCPP_END_NAMESPACE_FILESYSTEM107 108#endif // _LIBCPP_STD_VER >= 17109 110#endif // _LIBCPP___FILESYSTEM_PATH_ITERATOR_H111