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 _LIBCPP_PUSH_MACROS 28 #include <__undef_macros> 29 30 #if _LIBCPP_STD_VER >= 20 31 32 _LIBCPP_BEGIN_NAMESPACE_STD 33 34 template <forward_iterator _Iterator, class _Data> 35 class __iterator_with_data { 36 _Iterator __iter_{}; 37 _Data __data_{}; 38 39 public: 40 using value_type = iter_value_t<_Iterator>; 41 using difference_type = iter_difference_t<_Iterator>; 42 43 _LIBCPP_HIDE_FROM_ABI __iterator_with_data() = default; 44 45 constexpr _LIBCPP_HIDE_FROM_ABI __iterator_with_data(_Iterator __iter, _Data __data) 46 : __iter_(std::move(__iter)), __data_(std::move(__data)) {} 47 48 constexpr _LIBCPP_HIDE_FROM_ABI _Iterator __get_iter() const { return __iter_; } 49 50 constexpr _LIBCPP_HIDE_FROM_ABI _Data __get_data() && { return std::move(__data_); } 51 52 friend constexpr _LIBCPP_HIDE_FROM_ABI bool 53 operator==(const __iterator_with_data& __lhs, const __iterator_with_data& __rhs) { 54 return __lhs.__iter_ == __rhs.__iter_; 55 } 56 57 constexpr _LIBCPP_HIDE_FROM_ABI __iterator_with_data& operator++() { 58 ++__iter_; 59 return *this; 60 } 61 62 constexpr _LIBCPP_HIDE_FROM_ABI __iterator_with_data operator++(int) { 63 auto __tmp = *this; 64 __iter_++; 65 return __tmp; 66 } 67 68 constexpr _LIBCPP_HIDE_FROM_ABI __iterator_with_data& operator--() 69 requires bidirectional_iterator<_Iterator> 70 { 71 --__iter_; 72 return *this; 73 } 74 75 constexpr _LIBCPP_HIDE_FROM_ABI __iterator_with_data operator--(int) 76 requires bidirectional_iterator<_Iterator> 77 { 78 auto __tmp = *this; 79 --__iter_; 80 return __tmp; 81 } 82 83 constexpr _LIBCPP_HIDE_FROM_ABI iter_reference_t<_Iterator> operator*() const { return *__iter_; } 84 85 _LIBCPP_HIDE_FROM_ABI friend constexpr iter_rvalue_reference_t<_Iterator> 86 iter_move(const __iterator_with_data& __iter) noexcept(noexcept(ranges::iter_move(__iter.__iter_))) { 87 return ranges::iter_move(__iter.__iter_); 88 } 89 90 _LIBCPP_HIDE_FROM_ABI friend constexpr void 91 iter_swap(const __iterator_with_data& __lhs, 92 const __iterator_with_data& __rhs) noexcept(noexcept(ranges::iter_swap(__lhs.__iter_, __rhs.__iter_))) 93 requires indirectly_swappable<_Iterator> 94 { 95 return ranges::iter_swap(__lhs.__data_, __rhs.__iter_); 96 } 97 }; 98 99 _LIBCPP_END_NAMESPACE_STD 100 101 #endif // _LIBCPP_STD_VER >= 20 102 103 _LIBCPP_POP_MACROS 104 105 #endif // _LIBCPP___ITERATOR_ITERATOR_WITH_DATA_H 106