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_PSTL_EQUAL_H
10 #define _LIBCPP___ALGORITHM_PSTL_EQUAL_H
11
12 #include <__algorithm/equal.h>
13 #include <__algorithm/pstl_frontend_dispatch.h>
14 #include <__config>
15 #include <__functional/operations.h>
16 #include <__iterator/iterator_traits.h>
17 #include <__numeric/pstl_transform_reduce.h>
18 #include <__utility/move.h>
19
20 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
21 # pragma GCC system_header
22 #endif
23
24 _LIBCPP_PUSH_MACROS
25 #include <__undef_macros>
26
27 #if !defined(_LIBCPP_HAS_NO_INCOMPLETE_PSTL) && _LIBCPP_STD_VER >= 17
28
29 _LIBCPP_BEGIN_NAMESPACE_STD
30
31 template <class>
32 void __pstl_equal();
33
34 template <class _ExecutionPolicy,
35 class _ForwardIterator1,
36 class _ForwardIterator2,
37 class _Pred,
38 class _RawPolicy = __remove_cvref_t<_ExecutionPolicy>,
39 enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
40 [[nodiscard]] _LIBCPP_HIDE_FROM_ABI optional<bool>
__equal(_ExecutionPolicy && __policy,_ForwardIterator1 && __first1,_ForwardIterator1 && __last1,_ForwardIterator2 && __first2,_Pred && __pred)41 __equal(_ExecutionPolicy&& __policy,
42 _ForwardIterator1&& __first1,
43 _ForwardIterator1&& __last1,
44 _ForwardIterator2&& __first2,
45 _Pred&& __pred) noexcept {
46 return std::__pstl_frontend_dispatch(
47 _LIBCPP_PSTL_CUSTOMIZATION_POINT(__pstl_equal, _RawPolicy),
48 [&__policy](
49 _ForwardIterator1 __g_first1, _ForwardIterator1 __g_last1, _ForwardIterator2 __g_first2, _Pred __g_pred) {
50 return std::__transform_reduce(
51 __policy,
52 std::move(__g_first1),
53 std::move(__g_last1),
54 std::move(__g_first2),
55 true,
56 std::logical_and{},
57 std::move(__g_pred));
58 },
59 std::move(__first1),
60 std::move(__last1),
61 std::move(__first2),
62 std::move(__pred));
63 }
64
65 template <class _ExecutionPolicy,
66 class _ForwardIterator1,
67 class _ForwardIterator2,
68 class _Pred,
69 class _RawPolicy = __remove_cvref_t<_ExecutionPolicy>,
70 enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
71 _LIBCPP_HIDE_FROM_ABI bool
equal(_ExecutionPolicy && __policy,_ForwardIterator1 __first1,_ForwardIterator1 __last1,_ForwardIterator2 __first2,_Pred __pred)72 equal(_ExecutionPolicy&& __policy,
73 _ForwardIterator1 __first1,
74 _ForwardIterator1 __last1,
75 _ForwardIterator2 __first2,
76 _Pred __pred) {
77 auto __res = std::__equal(__policy, std::move(__first1), std::move(__last1), std::move(__first2), std::move(__pred));
78 if (!__res)
79 std::__throw_bad_alloc();
80 return *__res;
81 }
82
83 template <class _ExecutionPolicy,
84 class _ForwardIterator1,
85 class _ForwardIterator2,
86 enable_if_t<is_execution_policy_v<__remove_cvref_t<_ExecutionPolicy>>, int> = 0>
87 _LIBCPP_HIDE_FROM_ABI bool
equal(_ExecutionPolicy && __policy,_ForwardIterator1 __first1,_ForwardIterator1 __last1,_ForwardIterator2 __first2)88 equal(_ExecutionPolicy&& __policy, _ForwardIterator1 __first1, _ForwardIterator1 __last1, _ForwardIterator2 __first2) {
89 return std::equal(__policy, std::move(__first1), std::move(__last1), std::move(__first2), std::equal_to{});
90 }
91
92 template <class _ExecutionPolicy,
93 class _ForwardIterator1,
94 class _ForwardIterator2,
95 class _Pred,
96 class _RawPolicy = __remove_cvref_t<_ExecutionPolicy>,
97 enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
98 [[nodiscard]] _LIBCPP_HIDE_FROM_ABI optional<bool>
__equal(_ExecutionPolicy && __policy,_ForwardIterator1 && __first1,_ForwardIterator1 && __last1,_ForwardIterator2 && __first2,_ForwardIterator2 && __last2,_Pred && __pred)99 __equal(_ExecutionPolicy&& __policy,
100 _ForwardIterator1&& __first1,
101 _ForwardIterator1&& __last1,
102 _ForwardIterator2&& __first2,
103 _ForwardIterator2&& __last2,
104 _Pred&& __pred) noexcept {
105 return std::__pstl_frontend_dispatch(
106 _LIBCPP_PSTL_CUSTOMIZATION_POINT(__pstl_equal, _RawPolicy),
107 [&__policy](_ForwardIterator1 __g_first1,
108 _ForwardIterator1 __g_last1,
109 _ForwardIterator2 __g_first2,
110 _ForwardIterator2 __g_last2,
111 _Pred __g_pred) -> optional<bool> {
112 if constexpr (__has_random_access_iterator_category<_ForwardIterator1>::value &&
113 __has_random_access_iterator_category<_ForwardIterator2>::value) {
114 if (__g_last1 - __g_first1 != __g_last2 - __g_first2)
115 return false;
116 return std::__equal(
117 __policy, std::move(__g_first1), std::move(__g_last1), std::move(__g_first2), std::move(__g_pred));
118 } else {
119 (void)__policy; // Avoid unused lambda capture warning
120 return std::equal(
121 std::move(__g_first1),
122 std::move(__g_last1),
123 std::move(__g_first2),
124 std::move(__g_last2),
125 std::move(__g_pred));
126 }
127 },
128 std::move(__first1),
129 std::move(__last1),
130 std::move(__first2),
131 std::move(__last2),
132 std::move(__pred));
133 }
134
135 template <class _ExecutionPolicy,
136 class _ForwardIterator1,
137 class _ForwardIterator2,
138 class _Pred,
139 class _RawPolicy = __remove_cvref_t<_ExecutionPolicy>,
140 enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
141 _LIBCPP_HIDE_FROM_ABI bool
equal(_ExecutionPolicy && __policy,_ForwardIterator1 __first1,_ForwardIterator1 __last1,_ForwardIterator2 __first2,_ForwardIterator2 __last2,_Pred __pred)142 equal(_ExecutionPolicy&& __policy,
143 _ForwardIterator1 __first1,
144 _ForwardIterator1 __last1,
145 _ForwardIterator2 __first2,
146 _ForwardIterator2 __last2,
147 _Pred __pred) {
148 auto __res = std::__equal(
149 __policy, std::move(__first1), std::move(__last1), std::move(__first2), std::move(__last2), std::move(__pred));
150 if (!__res)
151 std::__throw_bad_alloc();
152 return *__res;
153 }
154
155 template <class _ExecutionPolicy,
156 class _ForwardIterator1,
157 class _ForwardIterator2,
158 enable_if_t<is_execution_policy_v<__remove_cvref_t<_ExecutionPolicy>>, int> = 0>
159 _LIBCPP_HIDE_FROM_ABI bool
equal(_ExecutionPolicy && __policy,_ForwardIterator1 __first1,_ForwardIterator1 __last1,_ForwardIterator2 __first2,_ForwardIterator2 __last2)160 equal(_ExecutionPolicy&& __policy,
161 _ForwardIterator1 __first1,
162 _ForwardIterator1 __last1,
163 _ForwardIterator2 __first2,
164 _ForwardIterator2 __last2) {
165 return std::equal(
166 __policy, std::move(__first1), std::move(__last1), std::move(__first2), std::move(__last2), std::equal_to{});
167 }
168
169 _LIBCPP_END_NAMESPACE_STD
170
171 #endif // !defined(_LIBCPP_HAS_NO_INCOMPLETE_PSTL) && _LIBCPP_STD_VER >= 17
172
173 _LIBCPP_POP_MACROS
174
175 #endif // _LIBCPP___ALGORITHM_PSTL_EQUAL_H
176