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| 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___CXX03___ALGORITHM_SET_DIFFERENCE_H |
| 10 | #define _LIBCPP___CXX03___ALGORITHM_SET_DIFFERENCE_H |
| 11 | |
| 12 | #include <__cxx03/__algorithm/comp.h> |
| 13 | #include <__cxx03/__algorithm/comp_ref_type.h> |
| 14 | #include <__cxx03/__algorithm/copy.h> |
| 15 | #include <__cxx03/__algorithm/iterator_operations.h> |
| 16 | #include <__cxx03/__config> |
| 17 | #include <__cxx03/__functional/identity.h> |
| 18 | #include <__cxx03/__iterator/iterator_traits.h> |
| 19 | #include <__cxx03/__type_traits/remove_cvref.h> |
| 20 | #include <__cxx03/__utility/move.h> |
| 21 | #include <__cxx03/__utility/pair.h> |
| 22 | |
| 23 | #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| 24 | # pragma GCC system_header |
| 25 | #endif |
| 26 | |
| 27 | _LIBCPP_PUSH_MACROS |
| 28 | #include <__cxx03/__undef_macros> |
| 29 | |
| 30 | _LIBCPP_BEGIN_NAMESPACE_STD |
| 31 | |
| 32 | template <class _AlgPolicy, class _Comp, class _InIter1, class _Sent1, class _InIter2, class _Sent2, class _OutIter> |
| 33 | _LIBCPP_HIDE_FROM_ABI pair<__remove_cvref_t<_InIter1>, __remove_cvref_t<_OutIter> > __set_difference( |
| 34 | _InIter1&& __first1, _Sent1&& __last1, _InIter2&& __first2, _Sent2&& __last2, _OutIter&& __result, _Comp&& __comp) { |
| 35 | while (__first1 != __last1 && __first2 != __last2) { |
| 36 | if (__comp(*__first1, *__first2)) { |
| 37 | *__result = *__first1; |
| 38 | ++__first1; |
| 39 | ++__result; |
| 40 | } else if (__comp(*__first2, *__first1)) { |
| 41 | ++__first2; |
| 42 | } else { |
| 43 | ++__first1; |
| 44 | ++__first2; |
| 45 | } |
| 46 | } |
| 47 | return std::__copy<_AlgPolicy>(std::move(__first1), std::move(__last1), std::move(__result)); |
| 48 | } |
| 49 | |
| 50 | template <class _InputIterator1, class _InputIterator2, class _OutputIterator, class _Compare> |
| 51 | inline _LIBCPP_HIDE_FROM_ABI _OutputIterator set_difference( |
| 52 | _InputIterator1 __first1, |
| 53 | _InputIterator1 __last1, |
| 54 | _InputIterator2 __first2, |
| 55 | _InputIterator2 __last2, |
| 56 | _OutputIterator __result, |
| 57 | _Compare __comp) { |
| 58 | return std::__set_difference<_ClassicAlgPolicy, __comp_ref_type<_Compare> >( |
| 59 | __first1, __last1, __first2, __last2, __result, __comp) |
| 60 | .second; |
| 61 | } |
| 62 | |
| 63 | template <class _InputIterator1, class _InputIterator2, class _OutputIterator> |
| 64 | inline _LIBCPP_HIDE_FROM_ABI _OutputIterator set_difference( |
| 65 | _InputIterator1 __first1, |
| 66 | _InputIterator1 __last1, |
| 67 | _InputIterator2 __first2, |
| 68 | _InputIterator2 __last2, |
| 69 | _OutputIterator __result) { |
| 70 | return std::__set_difference<_ClassicAlgPolicy>(__first1, __last1, __first2, __last2, __result, __less<>()).second; |
| 71 | } |
| 72 | |
| 73 | _LIBCPP_END_NAMESPACE_STD |
| 74 | |
| 75 | _LIBCPP_POP_MACROS |
| 76 | |
| 77 | #endif // _LIBCPP___CXX03___ALGORITHM_SET_DIFFERENCE_H |
| 78 |
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