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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_RECURSIVE_DIRECTORY_ITERATOR_H
#define _LIBCPP___FILESYSTEM_RECURSIVE_DIRECTORY_ITERATOR_H
#include <__availability>
#include <__config>
#include <__filesystem/directory_entry.h>
#include <__filesystem/directory_options.h>
#include <__filesystem/path.h>
#include <__iterator/iterator_traits.h>
#include <__memory/shared_ptr.h>
#include <__ranges/enable_borrowed_range.h>
#include <__ranges/enable_view.h>
#include <cstddef>
#include <system_error>
#ifndef _LIBCPP_CXX03_LANG
_LIBCPP_BEGIN_NAMESPACE_FILESYSTEM
_LIBCPP_AVAILABILITY_FILESYSTEM_PUSH
class recursive_directory_iterator {
public:
using value_type = directory_entry;
using difference_type = ptrdiff_t;
using pointer = directory_entry const*;
using reference = directory_entry const&;
using iterator_category = input_iterator_tag;
public:
// constructors and destructor
_LIBCPP_INLINE_VISIBILITY
recursive_directory_iterator() noexcept : __rec_(false) {}
_LIBCPP_INLINE_VISIBILITY
explicit recursive_directory_iterator(
const path& __p, directory_options __xoptions = directory_options::none)
: recursive_directory_iterator(__p, __xoptions, nullptr) {}
_LIBCPP_INLINE_VISIBILITY
recursive_directory_iterator(const path& __p, directory_options __xoptions,
error_code& __ec)
: recursive_directory_iterator(__p, __xoptions, &__ec) {}
_LIBCPP_INLINE_VISIBILITY
recursive_directory_iterator(const path& __p, error_code& __ec)
: recursive_directory_iterator(__p, directory_options::none, &__ec) {}
recursive_directory_iterator(const recursive_directory_iterator&) = default;
recursive_directory_iterator(recursive_directory_iterator&&) = default;
recursive_directory_iterator&
operator=(const recursive_directory_iterator&) = default;
_LIBCPP_INLINE_VISIBILITY
recursive_directory_iterator&
operator=(recursive_directory_iterator&& __o) noexcept {
// non-default implementation provided to support self-move assign.
if (this != &__o) {
__imp_ = _VSTD::move(__o.__imp_);
__rec_ = __o.__rec_;
}
return *this;
}
~recursive_directory_iterator() = default;
_LIBCPP_INLINE_VISIBILITY
const directory_entry& operator*() const { return __dereference(); }
_LIBCPP_INLINE_VISIBILITY
const directory_entry* operator->() const { return &__dereference(); }
recursive_directory_iterator& operator++() { return __increment(); }
_LIBCPP_INLINE_VISIBILITY
__dir_element_proxy operator++(int) {
__dir_element_proxy __p(**this);
__increment();
return __p;
}
_LIBCPP_INLINE_VISIBILITY
recursive_directory_iterator& increment(error_code& __ec) {
return __increment(&__ec);
}
_LIBCPP_FUNC_VIS directory_options options() const;
_LIBCPP_FUNC_VIS int depth() const;
_LIBCPP_INLINE_VISIBILITY
void pop() { __pop(); }
_LIBCPP_INLINE_VISIBILITY
void pop(error_code& __ec) { __pop(&__ec); }
_LIBCPP_INLINE_VISIBILITY
bool recursion_pending() const { return __rec_; }
_LIBCPP_INLINE_VISIBILITY
void disable_recursion_pending() { __rec_ = false; }
private:
_LIBCPP_FUNC_VIS
recursive_directory_iterator(const path& __p, directory_options __opt,
error_code* __ec);
_LIBCPP_FUNC_VIS
const directory_entry& __dereference() const;
_LIBCPP_FUNC_VIS
bool __try_recursion(error_code* __ec);
_LIBCPP_FUNC_VIS
void __advance(error_code* __ec = nullptr);
_LIBCPP_FUNC_VIS
recursive_directory_iterator& __increment(error_code* __ec = nullptr);
_LIBCPP_FUNC_VIS
void __pop(error_code* __ec = nullptr);
inline _LIBCPP_INLINE_VISIBILITY friend bool
operator==(const recursive_directory_iterator&,
const recursive_directory_iterator&) noexcept;
struct _LIBCPP_HIDDEN __shared_imp;
shared_ptr<__shared_imp> __imp_;
bool __rec_;
}; // class recursive_directory_iterator
inline _LIBCPP_INLINE_VISIBILITY bool
operator==(const recursive_directory_iterator& __lhs,
const recursive_directory_iterator& __rhs) noexcept {
return __lhs.__imp_ == __rhs.__imp_;
}
_LIBCPP_INLINE_VISIBILITY
inline bool operator!=(const recursive_directory_iterator& __lhs,
const recursive_directory_iterator& __rhs) noexcept {
return !(__lhs == __rhs);
}
// enable recursive_directory_iterator range-based for statements
inline _LIBCPP_INLINE_VISIBILITY recursive_directory_iterator
begin(recursive_directory_iterator __iter) noexcept {
return __iter;
}
inline _LIBCPP_INLINE_VISIBILITY recursive_directory_iterator
end(recursive_directory_iterator) noexcept {
return recursive_directory_iterator();
}
_LIBCPP_AVAILABILITY_FILESYSTEM_POP
_LIBCPP_END_NAMESPACE_FILESYSTEM
#if !defined(_LIBCPP_HAS_NO_RANGES)
template <>
_LIBCPP_AVAILABILITY_FILESYSTEM
inline constexpr bool _VSTD::ranges::enable_borrowed_range<_VSTD_FS::recursive_directory_iterator> = true;
template <>
_LIBCPP_AVAILABILITY_FILESYSTEM
inline constexpr bool _VSTD::ranges::enable_view<_VSTD_FS::recursive_directory_iterator> = true;
#endif
#endif // _LIBCPP_CXX03_LANG
#endif // _LIBCPP___FILESYSTEM_RECURSIVE_DIRECTORY_ITERATOR_H
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