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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_DIRECTORY_ITERATOR_H
#define _LIBCPP___FILESYSTEM_DIRECTORY_ITERATOR_H
#include <__assert>
#include <__availability>
#include <__config>
#include <__filesystem/directory_entry.h>
#include <__filesystem/directory_options.h>
#include <__filesystem/path.h>
#include <__iterator/default_sentinel.h>
#include <__iterator/iterator_traits.h>
#include <__memory/shared_ptr.h>
#include <__ranges/enable_borrowed_range.h>
#include <__ranges/enable_view.h>
#include <__system_error/error_code.h>
#include <__utility/move.h>
#include <cstddef>
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
# pragma GCC system_header
#endif
#if _LIBCPP_STD_VER >= 17 && !defined(_LIBCPP_HAS_NO_FILESYSTEM)
_LIBCPP_BEGIN_NAMESPACE_FILESYSTEM
_LIBCPP_AVAILABILITY_FILESYSTEM_LIBRARY_PUSH
class _LIBCPP_HIDDEN __dir_stream;
class directory_iterator {
public:
typedef directory_entry value_type;
typedef ptrdiff_t difference_type;
typedef value_type const* pointer;
typedef value_type const& reference;
typedef input_iterator_tag iterator_category;
public:
// ctor & dtor
_LIBCPP_HIDE_FROM_ABI directory_iterator() noexcept {}
_LIBCPP_HIDE_FROM_ABI explicit directory_iterator(const path& __p) : directory_iterator(__p, nullptr) {}
_LIBCPP_HIDE_FROM_ABI directory_iterator(const path& __p, directory_options __opts)
: directory_iterator(__p, nullptr, __opts) {}
_LIBCPP_HIDE_FROM_ABI directory_iterator(const path& __p, error_code& __ec) : directory_iterator(__p, &__ec) {}
_LIBCPP_HIDE_FROM_ABI directory_iterator(const path& __p, directory_options __opts, error_code& __ec)
: directory_iterator(__p, &__ec, __opts) {}
_LIBCPP_HIDE_FROM_ABI directory_iterator(const directory_iterator&) = default;
_LIBCPP_HIDE_FROM_ABI directory_iterator(directory_iterator&&) = default;
_LIBCPP_HIDE_FROM_ABI directory_iterator& operator=(const directory_iterator&) = default;
_LIBCPP_HIDE_FROM_ABI directory_iterator& operator=(directory_iterator&& __o) noexcept {
// non-default implementation provided to support self-move assign.
if (this != &__o) {
__imp_ = std::move(__o.__imp_);
}
return *this;
}
_LIBCPP_HIDE_FROM_ABI ~directory_iterator() = default;
_LIBCPP_HIDE_FROM_ABI const directory_entry& operator*() const {
// Note: this check duplicates a check in `__dereference()`.
_LIBCPP_ASSERT_NON_NULL(__imp_, "The end iterator cannot be dereferenced");
return __dereference();
}
_LIBCPP_HIDE_FROM_ABI const directory_entry* operator->() const { return &**this; }
_LIBCPP_HIDE_FROM_ABI directory_iterator& operator++() { return __increment(); }
_LIBCPP_HIDE_FROM_ABI __dir_element_proxy operator++(int) {
__dir_element_proxy __p(**this);
__increment();
return __p;
}
_LIBCPP_HIDE_FROM_ABI directory_iterator& increment(error_code& __ec) { return __increment(&__ec); }
# if _LIBCPP_STD_VER >= 20
_LIBCPP_HIDE_FROM_ABI bool operator==(default_sentinel_t) const noexcept { return *this == directory_iterator(); }
# endif
private:
inline _LIBCPP_HIDE_FROM_ABI friend bool
operator==(const directory_iterator& __lhs, const directory_iterator& __rhs) noexcept;
// construct the dir_stream
_LIBCPP_EXPORTED_FROM_ABI directory_iterator(const path&, error_code*, directory_options = directory_options::none);
_LIBCPP_EXPORTED_FROM_ABI directory_iterator& __increment(error_code* __ec = nullptr);
_LIBCPP_EXPORTED_FROM_ABI const directory_entry& __dereference() const;
private:
shared_ptr<__dir_stream> __imp_;
};
inline _LIBCPP_HIDE_FROM_ABI bool
operator==(const directory_iterator& __lhs, const directory_iterator& __rhs) noexcept {
return __lhs.__imp_ == __rhs.__imp_;
}
inline _LIBCPP_HIDE_FROM_ABI bool
operator!=(const directory_iterator& __lhs, const directory_iterator& __rhs) noexcept {
return !(__lhs == __rhs);
}
// enable directory_iterator range-based for statements
inline _LIBCPP_HIDE_FROM_ABI directory_iterator begin(directory_iterator __iter) noexcept { return __iter; }
inline _LIBCPP_HIDE_FROM_ABI directory_iterator end(directory_iterator) noexcept { return directory_iterator(); }
_LIBCPP_AVAILABILITY_FILESYSTEM_LIBRARY_POP
_LIBCPP_END_NAMESPACE_FILESYSTEM
# if _LIBCPP_STD_VER >= 20
template <>
_LIBCPP_AVAILABILITY_FILESYSTEM_LIBRARY inline constexpr bool
std::ranges::enable_borrowed_range<std::filesystem::directory_iterator> = true;
template <>
_LIBCPP_AVAILABILITY_FILESYSTEM_LIBRARY inline constexpr bool
std::ranges::enable_view<std::filesystem::directory_iterator> = true;
# endif // _LIBCPP_STD_VER >= 20
#endif // _LIBCPP_STD_VER >= 17 && !defined(_LIBCPP_HAS_NO_FILESYSTEM)
#endif // _LIBCPP___FILESYSTEM_DIRECTORY_ITERATOR_H
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