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_SET_SYMMETRIC_DIFFERENCE_H 10 #define _LIBCPP___ALGORITHM_SET_SYMMETRIC_DIFFERENCE_H 11 12 #include <__algorithm/comp.h> 13 #include <__algorithm/comp_ref_type.h> 14 #include <__algorithm/copy.h> 15 #include <__config> 16 #include <__iterator/iterator_traits.h> 17 18 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 19 #pragma GCC system_header 20 #endif 21 22 _LIBCPP_BEGIN_NAMESPACE_STD 23 24 template <class _Compare, class _InputIterator1, class _InputIterator2, class _OutputIterator> 25 _LIBCPP_CONSTEXPR_AFTER_CXX17 _OutputIterator 26 __set_symmetric_difference(_InputIterator1 __first1, _InputIterator1 __last1, 27 _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result, _Compare __comp) 28 { 29 while (__first1 != __last1) 30 { 31 if (__first2 == __last2) 32 return _VSTD::copy(__first1, __last1, __result); 33 if (__comp(*__first1, *__first2)) 34 { 35 *__result = *__first1; 36 ++__result; 37 ++__first1; 38 } 39 else 40 { 41 if (__comp(*__first2, *__first1)) 42 { 43 *__result = *__first2; 44 ++__result; 45 } 46 else 47 ++__first1; 48 ++__first2; 49 } 50 } 51 return _VSTD::copy(__first2, __last2, __result); 52 } 53 54 template <class _InputIterator1, class _InputIterator2, class _OutputIterator, class _Compare> 55 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 56 _OutputIterator 57 set_symmetric_difference(_InputIterator1 __first1, _InputIterator1 __last1, 58 _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result, _Compare __comp) 59 { 60 typedef typename __comp_ref_type<_Compare>::type _Comp_ref; 61 return _VSTD::__set_symmetric_difference<_Comp_ref>(__first1, __last1, __first2, __last2, __result, __comp); 62 } 63 64 template <class _InputIterator1, class _InputIterator2, class _OutputIterator> 65 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 66 _OutputIterator 67 set_symmetric_difference(_InputIterator1 __first1, _InputIterator1 __last1, 68 _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result) 69 { 70 return _VSTD::set_symmetric_difference(__first1, __last1, __first2, __last2, __result, 71 __less<typename iterator_traits<_InputIterator1>::value_type, 72 typename iterator_traits<_InputIterator2>::value_type>()); 73 } 74 75 _LIBCPP_END_NAMESPACE_STD 76 77 #endif // _LIBCPP___ALGORITHM_SET_SYMMETRIC_DIFFERENCE_H 78