1 //===----------------------------------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #ifndef _LIBCPP___ITERATOR_ITERATOR_WITH_DATA_H 10 #define _LIBCPP___ITERATOR_ITERATOR_WITH_DATA_H 11 12 #include <__compare/compare_three_way_result.h> 13 #include <__compare/three_way_comparable.h> 14 #include <__config> 15 #include <__iterator/concepts.h> 16 #include <__iterator/incrementable_traits.h> 17 #include <__iterator/iter_move.h> 18 #include <__iterator/iter_swap.h> 19 #include <__iterator/iterator_traits.h> 20 #include <__iterator/readable_traits.h> 21 #include <__utility/move.h> 22 23 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 24 # pragma GCC system_header 25 #endif 26 27 #if _LIBCPP_STD_VER >= 20 28 29 _LIBCPP_BEGIN_NAMESPACE_STD 30 31 template <forward_iterator _Iterator, class _Data> 32 class __iterator_with_data { 33 _Iterator __iter_{}; 34 _Data __data_{}; 35 36 public: 37 using value_type = iter_value_t<_Iterator>; 38 using difference_type = iter_difference_t<_Iterator>; 39 40 _LIBCPP_HIDE_FROM_ABI __iterator_with_data() = default; 41 __iterator_with_data(_Iterator __iter,_Data __data)42 constexpr _LIBCPP_HIDE_FROM_ABI __iterator_with_data(_Iterator __iter, _Data __data) 43 : __iter_(std::move(__iter)), __data_(std::move(__data)) {} 44 __get_iter()45 constexpr _LIBCPP_HIDE_FROM_ABI _Iterator __get_iter() const { return __iter_; } 46 __get_data()47 constexpr _LIBCPP_HIDE_FROM_ABI _Data __get_data() && { return std::move(__data_); } 48 49 friend constexpr _LIBCPP_HIDE_FROM_ABI bool 50 operator==(const __iterator_with_data& __lhs, const __iterator_with_data& __rhs) { 51 return __lhs.__iter_ == __rhs.__iter_; 52 } 53 54 constexpr _LIBCPP_HIDE_FROM_ABI __iterator_with_data& operator++() { 55 ++__iter_; 56 return *this; 57 } 58 59 constexpr _LIBCPP_HIDE_FROM_ABI __iterator_with_data operator++(int) { 60 auto __tmp = *this; 61 __iter_++; 62 return __tmp; 63 } 64 65 constexpr _LIBCPP_HIDE_FROM_ABI __iterator_with_data& operator--() 66 requires bidirectional_iterator<_Iterator> 67 { 68 --__iter_; 69 return *this; 70 } 71 72 constexpr _LIBCPP_HIDE_FROM_ABI __iterator_with_data operator--(int) 73 requires bidirectional_iterator<_Iterator> 74 { 75 auto __tmp = *this; 76 --__iter_; 77 return __tmp; 78 } 79 80 constexpr _LIBCPP_HIDE_FROM_ABI iter_reference_t<_Iterator> operator*() const { return *__iter_; } 81 82 _LIBCPP_HIDE_FROM_ABI friend constexpr iter_rvalue_reference_t<_Iterator> iter_move(const __iterator_with_data & __iter)83 iter_move(const __iterator_with_data& __iter) noexcept(noexcept(ranges::iter_move(__iter.__iter_))) { 84 return ranges::iter_move(__iter.__iter_); 85 } 86 87 _LIBCPP_HIDE_FROM_ABI friend constexpr void iter_swap(const __iterator_with_data & __lhs,const __iterator_with_data & __rhs)88 iter_swap(const __iterator_with_data& __lhs, 89 const __iterator_with_data& __rhs) noexcept(noexcept(ranges::iter_swap(__lhs.__iter_, __rhs.__iter_))) 90 requires indirectly_swappable<_Iterator> 91 { 92 return ranges::iter_swap(__lhs.__data_, __rhs.__iter_); 93 } 94 }; 95 96 _LIBCPP_END_NAMESPACE_STD 97 98 #endif // _LIBCPP_STD_VER >= 20 99 100 #endif // _LIBCPP___ITERATOR_ITERATOR_WITH_DATA_H 101