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 namespace __set_union { 47 48 struct __fn { 49 template <input_iterator _InIter1, 50 sentinel_for<_InIter1> _Sent1, 51 input_iterator _InIter2, 52 sentinel_for<_InIter2> _Sent2, 53 weakly_incrementable _OutIter, 54 class _Comp = ranges::less, 55 class _Proj1 = identity, 56 class _Proj2 = identity> 57 requires mergeable<_InIter1, _InIter2, _OutIter, _Comp, _Proj1, _Proj2> 58 _LIBCPP_HIDE_FROM_ABI constexpr set_union_result<_InIter1, _InIter2, _OutIter> operator()( 59 _InIter1 __first1, 60 _Sent1 __last1, 61 _InIter2 __first2, 62 _Sent2 __last2, 63 _OutIter __result, 64 _Comp __comp = {}, 65 _Proj1 __proj1 = {}, 66 _Proj2 __proj2 = {}) const { 67 auto __ret = std::__set_union<_RangeAlgPolicy>( 68 std::move(__first1), 69 std::move(__last1), 70 std::move(__first2), 71 std::move(__last2), 72 std::move(__result), 73 ranges::__make_projected_comp(__comp, __proj1, __proj2)); 74 return {std::move(__ret.__in1_), std::move(__ret.__in2_), std::move(__ret.__out_)}; 75 } 76 77 template <input_range _Range1, 78 input_range _Range2, 79 weakly_incrementable _OutIter, 80 class _Comp = ranges::less, 81 class _Proj1 = identity, 82 class _Proj2 = identity> 83 requires mergeable<iterator_t<_Range1>, iterator_t<_Range2>, _OutIter, _Comp, _Proj1, _Proj2> 84 _LIBCPP_HIDE_FROM_ABI constexpr set_union_result<borrowed_iterator_t<_Range1>, borrowed_iterator_t<_Range2>, _OutIter> 85 operator()(_Range1&& __range1, 86 _Range2&& __range2, 87 _OutIter __result, 88 _Comp __comp = {}, 89 _Proj1 __proj1 = {}, 90 _Proj2 __proj2 = {}) const { 91 auto __ret = std::__set_union<_RangeAlgPolicy>( 92 ranges::begin(__range1), 93 ranges::end(__range1), 94 ranges::begin(__range2), 95 ranges::end(__range2), 96 std::move(__result), 97 ranges::__make_projected_comp(__comp, __proj1, __proj2)); 98 return {std::move(__ret.__in1_), std::move(__ret.__in2_), std::move(__ret.__out_)}; 99 } 100 }; 101 102 } // namespace __set_union 103 104 inline namespace __cpo { 105 inline constexpr auto set_union = __set_union::__fn{}; 106 } // namespace __cpo 107 } // namespace ranges 108 109 _LIBCPP_END_NAMESPACE_STD 110 111 #endif // _LIBCPP_STD_VER >= 20 112 113 _LIBCPP_POP_MACROS 114 115 #endif // _LIBCPP___ALGORITHM_RANGES_SET_UNION_H 116