21f4232dd9
Reviewed By: ldionne, #libc Spies: libcxx-commits Differential Revision: https://reviews.llvm.org/D138413
101 lines
3.1 KiB
C++
101 lines
3.1 KiB
C++
//===----------------------------------------------------------------------===//
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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___ITERATOR_ITERATOR_WITH_DATA_H
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#define _LIBCPP___ITERATOR_ITERATOR_WITH_DATA_H
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#include <__compare/compare_three_way_result.h>
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#include <__compare/three_way_comparable.h>
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#include <__config>
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#include <__iterator/concepts.h>
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#include <__iterator/incrementable_traits.h>
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#include <__iterator/iter_move.h>
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#include <__iterator/iter_swap.h>
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#include <__iterator/iterator_traits.h>
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#include <__iterator/readable_traits.h>
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#include <__utility/move.h>
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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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#if _LIBCPP_STD_VER >= 20
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_LIBCPP_BEGIN_NAMESPACE_STD
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template <forward_iterator _Iterator, class _Data>
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class __iterator_with_data {
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_Iterator __iter_{};
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_Data __data_{};
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public:
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using value_type = iter_value_t<_Iterator>;
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using difference_type = iter_difference_t<_Iterator>;
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_LIBCPP_HIDE_FROM_ABI __iterator_with_data() = default;
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constexpr _LIBCPP_HIDE_FROM_ABI __iterator_with_data(_Iterator __iter, _Data __data)
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: __iter_(std::move(__iter)), __data_(std::move(__data)) {}
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constexpr _LIBCPP_HIDE_FROM_ABI _Iterator __get_iter() const { return __iter_; }
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constexpr _LIBCPP_HIDE_FROM_ABI _Data __get_data() && { return std::move(__data_); }
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friend constexpr _LIBCPP_HIDE_FROM_ABI bool
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operator==(const __iterator_with_data& __lhs, const __iterator_with_data& __rhs) {
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return __lhs.__iter_ == __rhs.__iter_;
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}
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constexpr _LIBCPP_HIDE_FROM_ABI __iterator_with_data& operator++() {
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++__iter_;
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return *this;
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}
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constexpr _LIBCPP_HIDE_FROM_ABI __iterator_with_data operator++(int) {
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auto __tmp = *this;
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__iter_++;
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return __tmp;
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}
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constexpr _LIBCPP_HIDE_FROM_ABI __iterator_with_data& operator--()
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requires bidirectional_iterator<_Iterator>
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{
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--__iter_;
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return *this;
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}
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constexpr _LIBCPP_HIDE_FROM_ABI __iterator_with_data operator--(int)
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requires bidirectional_iterator<_Iterator>
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{
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auto __tmp = *this;
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--__iter_;
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return __tmp;
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}
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constexpr _LIBCPP_HIDE_FROM_ABI iter_reference_t<_Iterator> operator*() const { return *__iter_; }
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_LIBCPP_HIDE_FROM_ABI friend constexpr iter_rvalue_reference_t<_Iterator>
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iter_move(const __iterator_with_data& __iter) noexcept(noexcept(ranges::iter_move(__iter.__iter_))) {
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return ranges::iter_move(__iter.__iter_);
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}
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_LIBCPP_HIDE_FROM_ABI friend constexpr void
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iter_swap(const __iterator_with_data& __lhs,
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const __iterator_with_data& __rhs) noexcept(noexcept(ranges::iter_swap(__lhs.__iter_, __rhs.__iter_)))
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requires indirectly_swappable<_Iterator>
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{
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return ranges::iter_swap(__lhs.__data_, __rhs.__iter_);
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}
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};
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_LIBCPP_END_NAMESPACE_STD
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#endif // _LIBCPP_STD_VER >= 20
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#endif // _LIBCPP___ITERATOR_ITERATOR_WITH_DATA_H
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