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