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_UNION_H 10 #define _LIBCPP___ALGORITHM_RANGES_SET_UNION_H 11 12 #include <__algorithm/in_in_out_result.h> 13 #include <__algorithm/iterator_operations.h> 14 #include <__algorithm/make_projected.h> 15 #include <__algorithm/set_union.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/iterator_traits.h> 22 #include <__iterator/mergeable.h> 23 #include <__iterator/projected.h> 24 #include <__ranges/access.h> 25 #include <__ranges/concepts.h> 26 #include <__ranges/dangling.h> 27 #include <__utility/forward.h> 28 #include <__utility/move.h> 29 30 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 31 # pragma GCC system_header 32 #endif 33 34 _LIBCPP_PUSH_MACROS 35 #include <__undef_macros> 36 37 #if _LIBCPP_STD_VER >= 20 38 39 _LIBCPP_BEGIN_NAMESPACE_STD 40 41 namespace ranges { 42 43 template <class _InIter1, class _InIter2, class _OutIter> 44 using set_union_result = in_in_out_result<_InIter1, _InIter2, _OutIter>; 45 46 struct __set_union { 47 template <input_iterator _InIter1, 48 sentinel_for<_InIter1> _Sent1, 49 input_iterator _InIter2, 50 sentinel_for<_InIter2> _Sent2, 51 weakly_incrementable _OutIter, 52 class _Comp = ranges::less, 53 class _Proj1 = identity, 54 class _Proj2 = identity> 55 requires mergeable<_InIter1, _InIter2, _OutIter, _Comp, _Proj1, _Proj2> 56 _LIBCPP_HIDE_FROM_ABI constexpr set_union_result<_InIter1, _InIter2, _OutIter> operator()( 57 _InIter1 __first1, 58 _Sent1 __last1, 59 _InIter2 __first2, 60 _Sent2 __last2, 61 _OutIter __result, 62 _Comp __comp = {}, 63 _Proj1 __proj1 = {}, 64 _Proj2 __proj2 = {}) const { 65 auto __ret = std::__set_union<_RangeAlgPolicy>( 66 std::move(__first1), 67 std::move(__last1), 68 std::move(__first2), 69 std::move(__last2), 70 std::move(__result), 71 ranges::__make_projected_comp(__comp, __proj1, __proj2)); 72 return {std::move(__ret.__in1_), std::move(__ret.__in2_), std::move(__ret.__out_)}; 73 } 74 75 template <input_range _Range1, 76 input_range _Range2, 77 weakly_incrementable _OutIter, 78 class _Comp = ranges::less, 79 class _Proj1 = identity, 80 class _Proj2 = identity> 81 requires mergeable<iterator_t<_Range1>, iterator_t<_Range2>, _OutIter, _Comp, _Proj1, _Proj2> 82 _LIBCPP_HIDE_FROM_ABI constexpr set_union_result<borrowed_iterator_t<_Range1>, borrowed_iterator_t<_Range2>, _OutIter> 83 operator()(_Range1&& __range1, 84 _Range2&& __range2, 85 _OutIter __result, 86 _Comp __comp = {}, 87 _Proj1 __proj1 = {}, 88 _Proj2 __proj2 = {}) const { 89 auto __ret = std::__set_union<_RangeAlgPolicy>( 90 ranges::begin(__range1), 91 ranges::end(__range1), 92 ranges::begin(__range2), 93 ranges::end(__range2), 94 std::move(__result), 95 ranges::__make_projected_comp(__comp, __proj1, __proj2)); 96 return {std::move(__ret.__in1_), std::move(__ret.__in2_), std::move(__ret.__out_)}; 97 } 98 }; 99 100 inline namespace __cpo { 101 inline constexpr auto set_union = __set_union{}; 102 } // namespace __cpo 103 } // namespace ranges 104 105 _LIBCPP_END_NAMESPACE_STD 106 107 #endif // _LIBCPP_STD_VER >= 20 108 109 _LIBCPP_POP_MACROS 110 111 #endif // _LIBCPP___ALGORITHM_RANGES_SET_UNION_H 112