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___ALGORITHM_RANGES_SET_DIFFERENCE_H 10 #define _LIBCPP___ALGORITHM_RANGES_SET_DIFFERENCE_H 11 12 #include <__algorithm/in_out_result.h> 13 #include <__algorithm/iterator_operations.h> 14 #include <__algorithm/make_projected.h> 15 #include <__algorithm/set_difference.h> 16 #include <__config> 17 #include <__functional/identity.h> 18 #include <__functional/invoke.h> 19 #include <__functional/ranges_operations.h> 20 #include <__iterator/concepts.h> 21 #include <__iterator/mergeable.h> 22 #include <__ranges/access.h> 23 #include <__ranges/concepts.h> 24 #include <__ranges/dangling.h> 25 #include <__type_traits/decay.h> 26 #include <__utility/move.h> 27 #include <__utility/pair.h> 28 29 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 30 # pragma GCC system_header 31 #endif 32 33 #if _LIBCPP_STD_VER >= 20 34 35 _LIBCPP_BEGIN_NAMESPACE_STD 36 37 namespace ranges { 38 39 template <class _InIter, class _OutIter> 40 using set_difference_result = in_out_result<_InIter, _OutIter>; 41 42 namespace __set_difference { 43 44 struct __fn { 45 template <input_iterator _InIter1, 46 sentinel_for<_InIter1> _Sent1, 47 input_iterator _InIter2, 48 sentinel_for<_InIter2> _Sent2, 49 weakly_incrementable _OutIter, 50 class _Comp = less, 51 class _Proj1 = identity, 52 class _Proj2 = identity> 53 requires mergeable<_InIter1, _InIter2, _OutIter, _Comp, _Proj1, _Proj2> 54 _LIBCPP_HIDE_FROM_ABI constexpr set_difference_result<_InIter1, _OutIter> operator()( 55 _InIter1 __first1, 56 _Sent1 __last1, 57 _InIter2 __first2, 58 _Sent2 __last2, 59 _OutIter __result, 60 _Comp __comp = {}, 61 _Proj1 __proj1 = {}, 62 _Proj2 __proj2 = {}) const { 63 auto __ret = std::__set_difference<_RangeAlgPolicy>( 64 __first1, __last1, __first2, __last2, __result, ranges::__make_projected_comp(__comp, __proj1, __proj2)); 65 return {std::move(__ret.first), std::move(__ret.second)}; 66 } 67 68 template <input_range _Range1, 69 input_range _Range2, 70 weakly_incrementable _OutIter, 71 class _Comp = less, 72 class _Proj1 = identity, 73 class _Proj2 = identity> 74 requires mergeable<iterator_t<_Range1>, iterator_t<_Range2>, _OutIter, _Comp, _Proj1, _Proj2> 75 _LIBCPP_HIDE_FROM_ABI constexpr set_difference_result<borrowed_iterator_t<_Range1>, _OutIter> 76 operator()(_Range1&& __range1, 77 _Range2&& __range2, 78 _OutIter __result, 79 _Comp __comp = {}, 80 _Proj1 __proj1 = {}, 81 _Proj2 __proj2 = {}) const { 82 auto __ret = std::__set_difference<_RangeAlgPolicy>( 83 ranges::begin(__range1), 84 ranges::end(__range1), 85 ranges::begin(__range2), 86 ranges::end(__range2), 87 __result, 88 ranges::__make_projected_comp(__comp, __proj1, __proj2)); 89 return {std::move(__ret.first), std::move(__ret.second)}; 90 } 91 }; 92 93 } // namespace __set_difference 94 95 inline namespace __cpo { 96 inline constexpr auto set_difference = __set_difference::__fn{}; 97 } // namespace __cpo 98 } // namespace ranges 99 100 _LIBCPP_END_NAMESPACE_STD 101 102 #endif // _LIBCPP_STD_VER >= 20 103 #endif // _LIBCPP___ALGORITHM_RANGES_SET_DIFFERENCE_H 104