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