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/make_projected.h> 14 #include <__algorithm/set_union.h> 15 #include <__config> 16 #include <__functional/identity.h> 17 #include <__functional/invoke.h> 18 #include <__functional/ranges_operations.h> 19 #include <__iterator/concepts.h> 20 #include <__iterator/iterator_traits.h> 21 #include <__iterator/mergeable.h> 22 #include <__iterator/projected.h> 23 #include <__ranges/access.h> 24 #include <__ranges/concepts.h> 25 #include <__ranges/dangling.h> 26 #include <__utility/forward.h> 27 #include <__utility/move.h> 28 29 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 30 # pragma GCC system_header 31 #endif 32 33 _LIBCPP_PUSH_MACROS 34 #include <__undef_macros> 35 36 #if _LIBCPP_STD_VER >= 20 37 38 _LIBCPP_BEGIN_NAMESPACE_STD 39 40 namespace ranges { 41 42 template <class _InIter1, class _InIter2, class _OutIter> 43 using set_union_result = in_in_out_result<_InIter1, _InIter2, _OutIter>; 44 45 struct __set_union { 46 template <input_iterator _InIter1, 47 sentinel_for<_InIter1> _Sent1, 48 input_iterator _InIter2, 49 sentinel_for<_InIter2> _Sent2, 50 weakly_incrementable _OutIter, 51 class _Comp = ranges::less, 52 class _Proj1 = identity, 53 class _Proj2 = identity> 54 requires mergeable<_InIter1, _InIter2, _OutIter, _Comp, _Proj1, _Proj2> 55 _LIBCPP_HIDE_FROM_ABI constexpr set_union_result<_InIter1, _InIter2, _OutIter> operator()( 56 _InIter1 __first1, 57 _Sent1 __last1, 58 _InIter2 __first2, 59 _Sent2 __last2, 60 _OutIter __result, 61 _Comp __comp = {}, 62 _Proj1 __proj1 = {}, 63 _Proj2 __proj2 = {}) const { 64 auto __ret = std::__set_union( 65 std::move(__first1), 66 std::move(__last1), 67 std::move(__first2), 68 std::move(__last2), 69 std::move(__result), 70 ranges::__make_projected_comp(__comp, __proj1, __proj2)); 71 return {std::move(__ret.__in1_), std::move(__ret.__in2_), std::move(__ret.__out_)}; 72 } 73 74 template <input_range _Range1, 75 input_range _Range2, 76 weakly_incrementable _OutIter, 77 class _Comp = ranges::less, 78 class _Proj1 = identity, 79 class _Proj2 = identity> 80 requires mergeable<iterator_t<_Range1>, iterator_t<_Range2>, _OutIter, _Comp, _Proj1, _Proj2> 81 _LIBCPP_HIDE_FROM_ABI constexpr set_union_result<borrowed_iterator_t<_Range1>, borrowed_iterator_t<_Range2>, _OutIter> 82 operator()(_Range1&& __range1, 83 _Range2&& __range2, 84 _OutIter __result, 85 _Comp __comp = {}, 86 _Proj1 __proj1 = {}, 87 _Proj2 __proj2 = {}) const { 88 auto __ret = std::__set_union( 89 ranges::begin(__range1), 90 ranges::end(__range1), 91 ranges::begin(__range2), 92 ranges::end(__range2), 93 std::move(__result), 94 ranges::__make_projected_comp(__comp, __proj1, __proj2)); 95 return {std::move(__ret.__in1_), std::move(__ret.__in2_), std::move(__ret.__out_)}; 96 } 97 }; 98 99 inline namespace __cpo { 100 inline constexpr auto set_union = __set_union{}; 101 } // namespace __cpo 102 } // namespace ranges 103 104 _LIBCPP_END_NAMESPACE_STD 105 106 #endif // _LIBCPP_STD_VER >= 20 107 108 _LIBCPP_POP_MACROS 109 110 #endif // _LIBCPP___ALGORITHM_RANGES_SET_UNION_H 111