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// -*- C++ -*-
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef _LIBCPP___FILESYSTEM_PATH_ITERATOR_H
#define _LIBCPP___FILESYSTEM_PATH_ITERATOR_H
#include <__availability>
#include <__config>
#include <__filesystem/path.h>
#include <__iterator/iterator_traits.h>
#include <__debug>
#include <cstddef>
#include <string>
#include <string_view>
#ifndef _LIBCPP_CXX03_LANG
_LIBCPP_BEGIN_NAMESPACE_FILESYSTEM
_LIBCPP_AVAILABILITY_FILESYSTEM_PUSH
class _LIBCPP_TYPE_VIS path::iterator {
public:
enum _ParserState : unsigned char {
_Singular,
_BeforeBegin,
_InRootName,
_InRootDir,
_InFilenames,
_InTrailingSep,
_AtEnd
};
public:
typedef bidirectional_iterator_tag iterator_category;
typedef path value_type;
typedef ptrdiff_t difference_type;
typedef const path* pointer;
typedef const path& reference;
typedef void
__stashing_iterator_tag; // See reverse_iterator and __is_stashing_iterator
public:
_LIBCPP_INLINE_VISIBILITY
iterator()
: __stashed_elem_(), __path_ptr_(nullptr), __entry_(),
__state_(_Singular) {}
iterator(const iterator&) = default;
~iterator() = default;
iterator& operator=(const iterator&) = default;
_LIBCPP_INLINE_VISIBILITY
reference operator*() const { return __stashed_elem_; }
_LIBCPP_INLINE_VISIBILITY
pointer operator->() const { return &__stashed_elem_; }
_LIBCPP_INLINE_VISIBILITY
iterator& operator++() {
_LIBCPP_ASSERT(__state_ != _Singular,
"attempting to increment a singular iterator");
_LIBCPP_ASSERT(__state_ != _AtEnd,
"attempting to increment the end iterator");
return __increment();
}
_LIBCPP_INLINE_VISIBILITY
iterator operator++(int) {
iterator __it(*this);
this->operator++();
return __it;
}
_LIBCPP_INLINE_VISIBILITY
iterator& operator--() {
_LIBCPP_ASSERT(__state_ != _Singular,
"attempting to decrement a singular iterator");
_LIBCPP_ASSERT(__entry_.data() != __path_ptr_->native().data(),
"attempting to decrement the begin iterator");
return __decrement();
}
_LIBCPP_INLINE_VISIBILITY
iterator operator--(int) {
iterator __it(*this);
this->operator--();
return __it;
}
private:
friend class path;
inline _LIBCPP_INLINE_VISIBILITY friend bool operator==(const iterator&,
const iterator&);
iterator& __increment();
iterator& __decrement();
path __stashed_elem_;
const path* __path_ptr_;
path::__string_view __entry_;
_ParserState __state_;
};
inline _LIBCPP_INLINE_VISIBILITY bool operator==(const path::iterator& __lhs,
const path::iterator& __rhs) {
return __lhs.__path_ptr_ == __rhs.__path_ptr_ &&
__lhs.__entry_.data() == __rhs.__entry_.data();
}
inline _LIBCPP_INLINE_VISIBILITY bool operator!=(const path::iterator& __lhs,
const path::iterator& __rhs) {
return !(__lhs == __rhs);
}
_LIBCPP_AVAILABILITY_FILESYSTEM_POP
_LIBCPP_END_NAMESPACE_FILESYSTEM
#endif // _LIBCPP_CXX03_LANG
#endif // _LIBCPP___FILESYSTEM_PATH_ITERATOR_H
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