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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