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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_SYMMETRIC_DIFFERENCE_H
10#define _LIBCPP___CXX03___ALGORITHM_SET_SYMMETRIC_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/__iterator/iterator_traits.h>
18#include <__cxx03/__utility/move.h>
19#include <__cxx03/__utility/pair.h>
20
21#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
22# pragma GCC system_header
23#endif
24
25_LIBCPP_PUSH_MACROS
26#include <__cxx03/__undef_macros>
27
28_LIBCPP_BEGIN_NAMESPACE_STD
29
30template <class _InIter1, class _InIter2, class _OutIter>
31struct __set_symmetric_difference_result {
32 _InIter1 __in1_;
33 _InIter2 __in2_;
34 _OutIter __out_;
35
36 // need a constructor as C++03 aggregate init is hard
37 _LIBCPP_HIDE_FROM_ABI
38 __set_symmetric_difference_result(_InIter1&& __in_iter1, _InIter2&& __in_iter2, _OutIter&& __out_iter)
39 : __in1_(std::move(__in_iter1)), __in2_(std::move(__in_iter2)), __out_(std::move(__out_iter)) {}
40};
41
42template <class _AlgPolicy, class _Compare, class _InIter1, class _Sent1, class _InIter2, class _Sent2, class _OutIter>
43_LIBCPP_HIDE_FROM_ABI __set_symmetric_difference_result<_InIter1, _InIter2, _OutIter> __set_symmetric_difference(
44 _InIter1 __first1, _Sent1 __last1, _InIter2 __first2, _Sent2 __last2, _OutIter __result, _Compare&& __comp) {
45 while (__first1 != __last1) {
46 if (__first2 == __last2) {
47 auto __ret1 = std::__copy<_AlgPolicy>(std::move(__first1), std::move(__last1), std::move(__result));
48 return __set_symmetric_difference_result<_InIter1, _InIter2, _OutIter>(
49 std::move(__ret1.first), std::move(__first2), std::move((__ret1.second)));
50 }
51 if (__comp(*__first1, *__first2)) {
52 *__result = *__first1;
53 ++__result;
54 ++__first1;
55 } else {
56 if (__comp(*__first2, *__first1)) {
57 *__result = *__first2;
58 ++__result;
59 } else {
60 ++__first1;
61 }
62 ++__first2;
63 }
64 }
65 auto __ret2 = std::__copy<_AlgPolicy>(std::move(__first2), std::move(__last2), std::move(__result));
66 return __set_symmetric_difference_result<_InIter1, _InIter2, _OutIter>(
67 std::move(__first1), std::move(__ret2.first), std::move((__ret2.second)));
68}
69
70template <class _InputIterator1, class _InputIterator2, class _OutputIterator, class _Compare>
71_LIBCPP_HIDE_FROM_ABI _OutputIterator set_symmetric_difference(
72 _InputIterator1 __first1,
73 _InputIterator1 __last1,
74 _InputIterator2 __first2,
75 _InputIterator2 __last2,
76 _OutputIterator __result,
77 _Compare __comp) {
78 return std::__set_symmetric_difference<_ClassicAlgPolicy, __comp_ref_type<_Compare> >(
79 std::move(__first1),
80 std::move(__last1),
81 std::move(__first2),
82 std::move(__last2),
83 std::move(__result),
84 __comp)
85 .__out_;
86}
87
88template <class _InputIterator1, class _InputIterator2, class _OutputIterator>
89_LIBCPP_HIDE_FROM_ABI _OutputIterator set_symmetric_difference(
90 _InputIterator1 __first1,
91 _InputIterator1 __last1,
92 _InputIterator2 __first2,
93 _InputIterator2 __last2,
94 _OutputIterator __result) {
95 return std::set_symmetric_difference(
96 std::move(__first1),
97 std::move(__last1),
98 std::move(__first2),
99 std::move(__last2),
100 std::move(__result),
101 __less<>());
102}
103
104_LIBCPP_END_NAMESPACE_STD
105
106_LIBCPP_POP_MACROS
107
108#endif // _LIBCPP___CXX03___ALGORITHM_SET_SYMMETRIC_DIFFERENCE_H
109

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source code of libcxx/include/__cxx03/__algorithm/set_symmetric_difference.h