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 > 17 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 < 46 input_iterator _InIter1, 47 sentinel_for<_InIter1> _Sent1, 48 input_iterator _InIter2, 49 sentinel_for<_InIter2> _Sent2, 50 weakly_incrementable _OutIter, 51 class _Comp = less, 52 class _Proj1 = identity, 53 class _Proj2 = identity> 54 requires mergeable<_InIter1, _InIter2, _OutIter, _Comp, _Proj1, _Proj2> operator__fn55 _LIBCPP_HIDE_FROM_ABI constexpr set_difference_result<_InIter1, _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_difference<_RangeAlgPolicy>( 65 __first1, __last1, __first2, __last2, __result, ranges::__make_projected_comp(__comp, __proj1, __proj2)); 66 return {std::move(__ret.first), std::move(__ret.second)}; 67 } 68 69 template < 70 input_range _Range1, 71 input_range _Range2, 72 weakly_incrementable _OutIter, 73 class _Comp = less, 74 class _Proj1 = identity, 75 class _Proj2 = identity> 76 requires mergeable<iterator_t<_Range1>, iterator_t<_Range2>, _OutIter, _Comp, _Proj1, _Proj2> 77 _LIBCPP_HIDE_FROM_ABI constexpr set_difference_result<borrowed_iterator_t<_Range1>, _OutIter> operator__fn78 operator()( 79 _Range1&& __range1, 80 _Range2&& __range2, 81 _OutIter __result, 82 _Comp __comp = {}, 83 _Proj1 __proj1 = {}, 84 _Proj2 __proj2 = {}) const { 85 auto __ret = std::__set_difference<_RangeAlgPolicy>( 86 ranges::begin(__range1), 87 ranges::end(__range1), 88 ranges::begin(__range2), 89 ranges::end(__range2), 90 __result, 91 ranges::__make_projected_comp(__comp, __proj1, __proj2)); 92 return {std::move(__ret.first), std::move(__ret.second)}; 93 } 94 }; 95 96 } // namespace __set_difference 97 98 inline namespace __cpo { 99 inline constexpr auto set_difference = __set_difference::__fn{}; 100 } // namespace __cpo 101 } // namespace ranges 102 103 _LIBCPP_END_NAMESPACE_STD 104 105 #endif // _LIBCPP_STD_VER > 17 106 #endif // _LIBCPP___ALGORITHM_RANGES_SET_DIFFERENCE_H 107