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 #if _LIBCPP_STD_VER > 17 35 36 _LIBCPP_BEGIN_NAMESPACE_STD 37 38 namespace ranges { 39 40 template <class _InIter1, class _InIter2, class _OutIter> 41 using set_union_result = in_in_out_result<_InIter1, _InIter2, _OutIter>; 42 43 namespace __set_union { 44 45 struct __fn { 46 template < 47 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 < 76 input_range _Range1, 77 input_range _Range2, 78 weakly_incrementable _OutIter, 79 class _Comp = ranges::less, 80 class _Proj1 = identity, 81 class _Proj2 = identity> 82 requires mergeable< 83 iterator_t<_Range1>, 84 iterator_t<_Range2>, 85 _OutIter, 86 _Comp, 87 _Proj1, 88 _Proj2> 89 _LIBCPP_HIDE_FROM_ABI constexpr set_union_result<borrowed_iterator_t<_Range1>, 90 borrowed_iterator_t<_Range2>, 91 _OutIter> 92 operator()( 93 _Range1&& __range1, 94 _Range2&& __range2, 95 _OutIter __result, 96 _Comp __comp = {}, 97 _Proj1 __proj1 = {}, 98 _Proj2 __proj2 = {}) const { 99 auto __ret = std::__set_union<_RangeAlgPolicy>( 100 ranges::begin(__range1), 101 ranges::end(__range1), 102 ranges::begin(__range2), 103 ranges::end(__range2), 104 std::move(__result), 105 ranges::__make_projected_comp(__comp, __proj1, __proj2)); 106 return {std::move(__ret.__in1_), std::move(__ret.__in2_), std::move(__ret.__out_)}; 107 } 108 }; 109 110 } // namespace __set_union 111 112 inline namespace __cpo { 113 inline constexpr auto set_union = __set_union::__fn{}; 114 } // namespace __cpo 115 } // namespace ranges 116 117 _LIBCPP_END_NAMESPACE_STD 118 119 #endif // _LIBCPP_STD_VER > 17 120 121 #endif // _LIBCPP___ALGORITHM_RANGES_SET_UNION_H 122