368faacac7
This commit reverts 5aaefa51 (and also partly 7f285f48e77 and b6d75682f9, which were related to the original commit). As landed, 5aaefa51 had unintended consequences on some downstream bots and didn't have proper coverage upstream due to a few subtle things. Implementing this is something we should do in libc++, however we'll first need to address a few issues listed in https://reviews.llvm.org/D106124#3349710. Differential Revision: https://reviews.llvm.org/D120683
135 lines
3.5 KiB
C++
135 lines
3.5 KiB
C++
// -*- C++ -*-
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//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef _LIBCPP___FILESYSTEM_PATH_ITERATOR_H
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#define _LIBCPP___FILESYSTEM_PATH_ITERATOR_H
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#include <__assert>
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#include <__availability>
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#include <__config>
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#include <__filesystem/path.h>
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#include <__iterator/iterator_traits.h>
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#include <cstddef>
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#include <string>
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#include <string_view>
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#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
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# pragma GCC system_header
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#endif
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#ifndef _LIBCPP_CXX03_LANG
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_LIBCPP_BEGIN_NAMESPACE_FILESYSTEM
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_LIBCPP_AVAILABILITY_FILESYSTEM_PUSH
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class _LIBCPP_TYPE_VIS path::iterator {
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public:
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enum _ParserState : unsigned char {
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_Singular,
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_BeforeBegin,
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_InRootName,
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_InRootDir,
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_InFilenames,
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_InTrailingSep,
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_AtEnd
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};
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public:
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typedef input_iterator_tag iterator_category;
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typedef bidirectional_iterator_tag iterator_concept;
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typedef path value_type;
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typedef ptrdiff_t difference_type;
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typedef const path* pointer;
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typedef path reference;
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public:
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_LIBCPP_INLINE_VISIBILITY
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iterator()
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: __stashed_elem_(), __path_ptr_(nullptr), __entry_(),
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__state_(_Singular) {}
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iterator(const iterator&) = default;
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~iterator() = default;
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iterator& operator=(const iterator&) = default;
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_LIBCPP_INLINE_VISIBILITY
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reference operator*() const { return __stashed_elem_; }
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_LIBCPP_INLINE_VISIBILITY
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pointer operator->() const { return &__stashed_elem_; }
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_LIBCPP_INLINE_VISIBILITY
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iterator& operator++() {
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_LIBCPP_ASSERT(__state_ != _Singular,
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"attempting to increment a singular iterator");
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_LIBCPP_ASSERT(__state_ != _AtEnd,
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"attempting to increment the end iterator");
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return __increment();
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}
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_LIBCPP_INLINE_VISIBILITY
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iterator operator++(int) {
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iterator __it(*this);
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this->operator++();
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return __it;
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}
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_LIBCPP_INLINE_VISIBILITY
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iterator& operator--() {
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_LIBCPP_ASSERT(__state_ != _Singular,
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"attempting to decrement a singular iterator");
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_LIBCPP_ASSERT(__entry_.data() != __path_ptr_->native().data(),
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"attempting to decrement the begin iterator");
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return __decrement();
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}
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_LIBCPP_INLINE_VISIBILITY
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iterator operator--(int) {
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iterator __it(*this);
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this->operator--();
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return __it;
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}
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private:
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friend class path;
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inline _LIBCPP_INLINE_VISIBILITY friend bool operator==(const iterator&,
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const iterator&);
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iterator& __increment();
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iterator& __decrement();
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path __stashed_elem_;
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const path* __path_ptr_;
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path::__string_view __entry_;
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_ParserState __state_;
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};
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inline _LIBCPP_INLINE_VISIBILITY bool operator==(const path::iterator& __lhs,
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const path::iterator& __rhs) {
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return __lhs.__path_ptr_ == __rhs.__path_ptr_ &&
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__lhs.__entry_.data() == __rhs.__entry_.data();
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}
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inline _LIBCPP_INLINE_VISIBILITY bool operator!=(const path::iterator& __lhs,
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const path::iterator& __rhs) {
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return !(__lhs == __rhs);
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}
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_LIBCPP_AVAILABILITY_FILESYSTEM_POP
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_LIBCPP_END_NAMESPACE_FILESYSTEM
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#endif // _LIBCPP_CXX03_LANG
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#endif // _LIBCPP___FILESYSTEM_PATH_ITERATOR_H
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