| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef _LIBCPP___ALGORITHM_SET_DIFFERENCE_H |
| #define _LIBCPP___ALGORITHM_SET_DIFFERENCE_H |
| |
| #include <__algorithm/comp.h> |
| #include <__algorithm/comp_ref_type.h> |
| #include <__algorithm/copy.h> |
| #include <__algorithm/iterator_operations.h> |
| #include <__config> |
| #include <__functional/identity.h> |
| #include <__functional/invoke.h> |
| #include <__iterator/iterator_traits.h> |
| #include <__utility/move.h> |
| #include <__utility/pair.h> |
| #include <type_traits> |
| |
| #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| # pragma GCC system_header |
| #endif |
| |
| _LIBCPP_BEGIN_NAMESPACE_STD |
| |
| template <class _AlgPolicy, class _Comp, class _InIter1, class _Sent1, class _InIter2, class _Sent2, class _OutIter> |
| _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 pair<__remove_cvref_t<_InIter1>, __remove_cvref_t<_OutIter> > |
| __set_difference( |
| _InIter1&& __first1, _Sent1&& __last1, _InIter2&& __first2, _Sent2&& __last2, _OutIter&& __result, _Comp&& __comp) { |
| while (__first1 != __last1 && __first2 != __last2) { |
| if (__comp(*__first1, *__first2)) { |
| *__result = *__first1; |
| ++__first1; |
| ++__result; |
| } else if (__comp(*__first2, *__first1)) { |
| ++__first2; |
| } else { |
| ++__first1; |
| ++__first2; |
| } |
| } |
| return std::__copy<_AlgPolicy>(std::move(__first1), std::move(__last1), std::move(__result)); |
| } |
| |
| template <class _InputIterator1, class _InputIterator2, class _OutputIterator, class _Compare> |
| inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _OutputIterator set_difference( |
| _InputIterator1 __first1, |
| _InputIterator1 __last1, |
| _InputIterator2 __first2, |
| _InputIterator2 __last2, |
| _OutputIterator __result, |
| _Compare __comp) { |
| return std::__set_difference<_ClassicAlgPolicy, __comp_ref_type<_Compare> >( |
| __first1, __last1, __first2, __last2, __result, __comp) |
| .second; |
| } |
| |
| template <class _InputIterator1, class _InputIterator2, class _OutputIterator> |
| inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _OutputIterator set_difference( |
| _InputIterator1 __first1, |
| _InputIterator1 __last1, |
| _InputIterator2 __first2, |
| _InputIterator2 __last2, |
| _OutputIterator __result) { |
| return std::__set_difference<_ClassicAlgPolicy>( |
| __first1, |
| __last1, |
| __first2, |
| __last2, |
| __result, |
| __less<typename iterator_traits<_InputIterator1>::value_type, |
| typename iterator_traits<_InputIterator2>::value_type>()).second; |
| } |
| |
| _LIBCPP_END_NAMESPACE_STD |
| |
| #endif // _LIBCPP___ALGORITHM_SET_DIFFERENCE_H |