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_INTERSECTION_H 10 #define _LIBCPP___ALGORITHM_SET_INTERSECTION_H 11 12 #include <__algorithm/comp.h> 13 #include <__algorithm/comp_ref_type.h> 14 #include <__config> 15 #include <__iterator/iterator_traits.h> 16 17 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 18 # pragma GCC system_header 19 # pragma clang include_instead(<algorithm>) 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_intersection(_InputIterator1 __first1, _InputIterator1 __last1, 27 _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result, _Compare __comp) 28 { 29 while (__first1 != __last1 && __first2 != __last2) 30 { 31 if (__comp(*__first1, *__first2)) 32 ++__first1; 33 else 34 { 35 if (!__comp(*__first2, *__first1)) 36 { 37 *__result = *__first1; 38 ++__result; 39 ++__first1; 40 } 41 ++__first2; 42 } 43 } 44 return __result; 45 } 46 47 template <class _InputIterator1, class _InputIterator2, class _OutputIterator, class _Compare> 48 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 49 _OutputIterator 50 set_intersection(_InputIterator1 __first1, _InputIterator1 __last1, 51 _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result, _Compare __comp) 52 { 53 typedef typename __comp_ref_type<_Compare>::type _Comp_ref; 54 return _VSTD::__set_intersection<_Comp_ref>(__first1, __last1, __first2, __last2, __result, __comp); 55 } 56 57 template <class _InputIterator1, class _InputIterator2, class _OutputIterator> 58 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 59 _OutputIterator 60 set_intersection(_InputIterator1 __first1, _InputIterator1 __last1, 61 _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result) 62 { 63 return _VSTD::set_intersection(__first1, __last1, __first2, __last2, __result, 64 __less<typename iterator_traits<_InputIterator1>::value_type, 65 typename iterator_traits<_InputIterator2>::value_type>()); 66 } 67 68 _LIBCPP_END_NAMESPACE_STD 69 70 #endif // _LIBCPP___ALGORITHM_SET_INTERSECTION_H 71