53406fb691
The logic here is that we are disabling *only* things in `std::ranges::`. Everything in `std::` is permitted, including `default_sentinel`, `contiguous_iterator`, `common_iterator`, `projected`, `swappable`, and so on. Then, we include anything from `std::ranges::` that is required in order to make those things work: `ranges::swap`, `ranges::swap_ranges`, `input_range`, `ranges::begin`, `ranges::iter_move`, and so on. But then that's all. Everything else (including notably all of the "views" and the `std::views` namespace itself) is still locked up behind `_LIBCPP_HAS_NO_INCOMPLETE_RANGES`. Differential Revision: https://reviews.llvm.org/D118736
155 lines
4.3 KiB
C++
155 lines
4.3 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_DIRECTORY_ITERATOR_H
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#define _LIBCPP___FILESYSTEM_DIRECTORY_ITERATOR_H
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#include <__availability>
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#include <__config>
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#include <__debug>
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#include <__filesystem/directory_entry.h>
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#include <__filesystem/directory_options.h>
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#include <__filesystem/path.h>
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#include <__iterator/iterator_traits.h>
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#include <__memory/shared_ptr.h>
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#include <__ranges/enable_borrowed_range.h>
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#include <__ranges/enable_view.h>
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#include <cstddef>
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#include <system_error>
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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_HIDDEN __dir_stream;
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class directory_iterator {
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public:
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typedef directory_entry value_type;
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typedef ptrdiff_t difference_type;
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typedef value_type const* pointer;
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typedef value_type const& reference;
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typedef input_iterator_tag iterator_category;
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public:
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//ctor & dtor
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directory_iterator() noexcept {}
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explicit directory_iterator(const path& __p)
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: directory_iterator(__p, nullptr) {}
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directory_iterator(const path& __p, directory_options __opts)
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: directory_iterator(__p, nullptr, __opts) {}
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directory_iterator(const path& __p, error_code& __ec)
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: directory_iterator(__p, &__ec) {}
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directory_iterator(const path& __p, directory_options __opts,
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error_code& __ec)
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: directory_iterator(__p, &__ec, __opts) {}
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directory_iterator(const directory_iterator&) = default;
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directory_iterator(directory_iterator&&) = default;
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directory_iterator& operator=(const directory_iterator&) = default;
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directory_iterator& operator=(directory_iterator&& __o) noexcept {
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// non-default implementation provided to support self-move assign.
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if (this != &__o) {
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__imp_ = _VSTD::move(__o.__imp_);
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}
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return *this;
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}
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~directory_iterator() = default;
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const directory_entry& operator*() const {
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_LIBCPP_ASSERT(__imp_, "The end iterator cannot be dereferenced");
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return __dereference();
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}
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const directory_entry* operator->() const { return &**this; }
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directory_iterator& operator++() { return __increment(); }
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__dir_element_proxy operator++(int) {
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__dir_element_proxy __p(**this);
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__increment();
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return __p;
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}
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directory_iterator& increment(error_code& __ec) { return __increment(&__ec); }
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private:
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inline _LIBCPP_INLINE_VISIBILITY friend bool
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operator==(const directory_iterator& __lhs,
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const directory_iterator& __rhs) noexcept;
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// construct the dir_stream
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_LIBCPP_FUNC_VIS
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directory_iterator(const path&, error_code*,
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directory_options = directory_options::none);
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_LIBCPP_FUNC_VIS
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directory_iterator& __increment(error_code* __ec = nullptr);
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_LIBCPP_FUNC_VIS
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const directory_entry& __dereference() const;
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private:
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shared_ptr<__dir_stream> __imp_;
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};
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inline _LIBCPP_INLINE_VISIBILITY bool
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operator==(const directory_iterator& __lhs,
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const directory_iterator& __rhs) noexcept {
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return __lhs.__imp_ == __rhs.__imp_;
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}
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inline _LIBCPP_INLINE_VISIBILITY bool
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operator!=(const directory_iterator& __lhs,
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const directory_iterator& __rhs) noexcept {
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return !(__lhs == __rhs);
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}
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// enable directory_iterator range-based for statements
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inline _LIBCPP_INLINE_VISIBILITY directory_iterator
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begin(directory_iterator __iter) noexcept {
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return __iter;
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}
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inline _LIBCPP_INLINE_VISIBILITY directory_iterator
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end(directory_iterator) noexcept {
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return directory_iterator();
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}
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_LIBCPP_AVAILABILITY_FILESYSTEM_POP
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_LIBCPP_END_NAMESPACE_FILESYSTEM
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#if !defined(_LIBCPP_HAS_NO_CONCEPTS)
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template <>
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_LIBCPP_AVAILABILITY_FILESYSTEM
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inline constexpr bool _VSTD::ranges::enable_borrowed_range<_VSTD_FS::directory_iterator> = true;
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template <>
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_LIBCPP_AVAILABILITY_FILESYSTEM
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inline constexpr bool _VSTD::ranges::enable_view<_VSTD_FS::directory_iterator> = true;
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#endif // !defined(_LIBCPP_HAS_NO_CONCEPTS)
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#endif // _LIBCPP_CXX03_LANG
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#endif // _LIBCPP___FILESYSTEM_DIRECTORY_ITERATOR_H
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