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_REPLACE_H
10 #define _LIBCPP___ALGORITHM_PSTL_REPLACE_H
11
12 #include <__algorithm/pstl_backend.h>
13 #include <__algorithm/pstl_for_each.h>
14 #include <__algorithm/pstl_frontend_dispatch.h>
15 #include <__algorithm/pstl_transform.h>
16 #include <__config>
17 #include <__iterator/iterator_traits.h>
18 #include <__type_traits/enable_if.h>
19 #include <__type_traits/remove_cvref.h>
20 #include <__utility/move.h>
21 #include <optional>
22
23 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
24 # pragma GCC system_header
25 #endif
26
27 _LIBCPP_PUSH_MACROS
28 #include <__undef_macros>
29
30 #if !defined(_LIBCPP_HAS_NO_INCOMPLETE_PSTL) && _LIBCPP_STD_VER >= 17
31
32 _LIBCPP_BEGIN_NAMESPACE_STD
33
34 template <class>
35 void __pstl_replace_if();
36
37 template <class _ExecutionPolicy,
38 class _ForwardIterator,
39 class _Pred,
40 class _Tp,
41 class _RawPolicy = __remove_cvref_t<_ExecutionPolicy>,
42 enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
43 [[nodiscard]] _LIBCPP_HIDE_FROM_ABI optional<__empty>
__replace_if(_ExecutionPolicy && __policy,_ForwardIterator && __first,_ForwardIterator && __last,_Pred && __pred,const _Tp & __new_value)44 __replace_if(_ExecutionPolicy&& __policy,
45 _ForwardIterator&& __first,
46 _ForwardIterator&& __last,
47 _Pred&& __pred,
48 const _Tp& __new_value) noexcept {
49 return std::__pstl_frontend_dispatch(
50 _LIBCPP_PSTL_CUSTOMIZATION_POINT(__pstl_replace_if, _RawPolicy),
51 [&__policy](
52 _ForwardIterator&& __g_first, _ForwardIterator&& __g_last, _Pred&& __g_pred, const _Tp& __g_new_value) {
53 std::for_each(__policy, __g_first, __g_last, [&](__iter_reference<_ForwardIterator> __element) {
54 if (__g_pred(__element))
55 __element = __g_new_value;
56 });
57 return optional<__empty>{__empty{}};
58 },
59 std::move(__first),
60 std::move(__last),
61 std::move(__pred),
62 __new_value);
63 }
64
65 template <class _ExecutionPolicy,
66 class _ForwardIterator,
67 class _Pred,
68 class _Tp,
69 class _RawPolicy = __remove_cvref_t<_ExecutionPolicy>,
70 enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
71 _LIBCPP_HIDE_FROM_ABI void
replace_if(_ExecutionPolicy && __policy,_ForwardIterator __first,_ForwardIterator __last,_Pred __pred,const _Tp & __new_value)72 replace_if(_ExecutionPolicy&& __policy,
73 _ForwardIterator __first,
74 _ForwardIterator __last,
75 _Pred __pred,
76 const _Tp& __new_value) {
77 auto __res = std::__replace_if(__policy, std::move(__first), std::move(__last), std::move(__pred), __new_value);
78 if (!__res)
79 std::__throw_bad_alloc();
80 }
81
82 template <class>
83 void __pstl_replace();
84
85 template <class _ExecutionPolicy,
86 class _ForwardIterator,
87 class _Tp,
88 class _RawPolicy = __remove_cvref_t<_ExecutionPolicy>,
89 enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
90 [[nodiscard]] _LIBCPP_HIDE_FROM_ABI optional<__empty>
__replace(_ExecutionPolicy && __policy,_ForwardIterator __first,_ForwardIterator __last,const _Tp & __old_value,const _Tp & __new_value)91 __replace(_ExecutionPolicy&& __policy,
92 _ForwardIterator __first,
93 _ForwardIterator __last,
94 const _Tp& __old_value,
95 const _Tp& __new_value) noexcept {
96 return std::__pstl_frontend_dispatch(
97 _LIBCPP_PSTL_CUSTOMIZATION_POINT(__pstl_replace, _RawPolicy),
98 [&__policy](
99 _ForwardIterator __g_first, _ForwardIterator __g_last, const _Tp& __g_old_value, const _Tp& __g_new_value) {
100 return std::__replace_if(
101 __policy,
102 std::move(__g_first),
103 std::move(__g_last),
104 [&](__iter_reference<_ForwardIterator> __element) { return __element == __g_old_value; },
105 __g_new_value);
106 },
107 std::move(__first),
108 std::move(__last),
109 __old_value,
110 __new_value);
111 }
112
113 template <class _ExecutionPolicy,
114 class _ForwardIterator,
115 class _Tp,
116 class _RawPolicy = __remove_cvref_t<_ExecutionPolicy>,
117 enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
118 _LIBCPP_HIDE_FROM_ABI void
replace(_ExecutionPolicy && __policy,_ForwardIterator __first,_ForwardIterator __last,const _Tp & __old_value,const _Tp & __new_value)119 replace(_ExecutionPolicy&& __policy,
120 _ForwardIterator __first,
121 _ForwardIterator __last,
122 const _Tp& __old_value,
123 const _Tp& __new_value) {
124 if (!std::__replace(__policy, std::move(__first), std::move(__last), __old_value, __new_value))
125 std::__throw_bad_alloc();
126 }
127
128 template <class>
129 void __pstl_replace_copy_if();
130
131 template <class _ExecutionPolicy,
132 class _ForwardIterator,
133 class _ForwardOutIterator,
134 class _Pred,
135 class _Tp,
136 class _RawPolicy = __remove_cvref_t<_ExecutionPolicy>,
137 enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
__replace_copy_if(_ExecutionPolicy && __policy,_ForwardIterator && __first,_ForwardIterator && __last,_ForwardOutIterator && __result,_Pred && __pred,const _Tp & __new_value)138 [[nodiscard]] _LIBCPP_HIDE_FROM_ABI optional<__empty> __replace_copy_if(
139 _ExecutionPolicy&& __policy,
140 _ForwardIterator&& __first,
141 _ForwardIterator&& __last,
142 _ForwardOutIterator&& __result,
143 _Pred&& __pred,
144 const _Tp& __new_value) {
145 return std::__pstl_frontend_dispatch(
146 _LIBCPP_PSTL_CUSTOMIZATION_POINT(__pstl_replace_copy_if, _RawPolicy),
147 [&__policy](_ForwardIterator __g_first,
148 _ForwardIterator __g_last,
149 _ForwardOutIterator __g_result,
150 _Pred __g_pred,
151 const _Tp& __g_new_value) -> optional<__empty> {
152 if (!std::__transform(
153 __policy, __g_first, __g_last, __g_result, [&](__iter_reference<_ForwardIterator> __element) {
154 return __g_pred(__element) ? __g_new_value : __element;
155 }))
156 return nullopt;
157 return __empty{};
158 },
159 std::move(__first),
160 std::move(__last),
161 std::move(__result),
162 std::move(__pred),
163 __new_value);
164 }
165
166 template <class _ExecutionPolicy,
167 class _ForwardIterator,
168 class _ForwardOutIterator,
169 class _Pred,
170 class _Tp,
171 class _RawPolicy = __remove_cvref_t<_ExecutionPolicy>,
172 enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
replace_copy_if(_ExecutionPolicy && __policy,_ForwardIterator __first,_ForwardIterator __last,_ForwardOutIterator __result,_Pred __pred,const _Tp & __new_value)173 _LIBCPP_HIDE_FROM_ABI void replace_copy_if(
174 _ExecutionPolicy&& __policy,
175 _ForwardIterator __first,
176 _ForwardIterator __last,
177 _ForwardOutIterator __result,
178 _Pred __pred,
179 const _Tp& __new_value) {
180 if (!std::__replace_copy_if(
181 __policy, std::move(__first), std::move(__last), std::move(__result), std::move(__pred), __new_value))
182 std::__throw_bad_alloc();
183 }
184
185 template <class>
186 void __pstl_replace_copy();
187
188 template <class _ExecutionPolicy,
189 class _ForwardIterator,
190 class _ForwardOutIterator,
191 class _Tp,
192 class _RawPolicy = __remove_cvref_t<_ExecutionPolicy>,
193 enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
__replace_copy(_ExecutionPolicy && __policy,_ForwardIterator && __first,_ForwardIterator && __last,_ForwardOutIterator && __result,const _Tp & __old_value,const _Tp & __new_value)194 [[nodiscard]] _LIBCPP_HIDE_FROM_ABI optional<__empty> __replace_copy(
195 _ExecutionPolicy&& __policy,
196 _ForwardIterator&& __first,
197 _ForwardIterator&& __last,
198 _ForwardOutIterator&& __result,
199 const _Tp& __old_value,
200 const _Tp& __new_value) noexcept {
201 return std::__pstl_frontend_dispatch(
202 _LIBCPP_PSTL_CUSTOMIZATION_POINT(__pstl_replace_copy, _RawPolicy),
203 [&__policy](_ForwardIterator __g_first,
204 _ForwardIterator __g_last,
205 _ForwardOutIterator __g_result,
206 const _Tp& __g_old_value,
207 const _Tp& __g_new_value) {
208 return std::__replace_copy_if(
209 __policy,
210 std::move(__g_first),
211 std::move(__g_last),
212 std::move(__g_result),
213 [&](__iter_reference<_ForwardIterator> __element) { return __element == __g_old_value; },
214 __g_new_value);
215 },
216 std::move(__first),
217 std::move(__last),
218 std::move(__result),
219 __old_value,
220 __new_value);
221 }
222
223 template <class _ExecutionPolicy,
224 class _ForwardIterator,
225 class _ForwardOutIterator,
226 class _Tp,
227 class _RawPolicy = __remove_cvref_t<_ExecutionPolicy>,
228 enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
replace_copy(_ExecutionPolicy && __policy,_ForwardIterator __first,_ForwardIterator __last,_ForwardOutIterator __result,const _Tp & __old_value,const _Tp & __new_value)229 _LIBCPP_HIDE_FROM_ABI void replace_copy(
230 _ExecutionPolicy&& __policy,
231 _ForwardIterator __first,
232 _ForwardIterator __last,
233 _ForwardOutIterator __result,
234 const _Tp& __old_value,
235 const _Tp& __new_value) {
236 if (!std::__replace_copy(
237 __policy, std::move(__first), std::move(__last), std::move(__result), __old_value, __new_value))
238 std::__throw_bad_alloc();
239 }
240
241 _LIBCPP_END_NAMESPACE_STD
242
243 #endif // !defined(_LIBCPP_HAS_NO_INCOMPLETE_PSTL) && _LIBCPP_STD_VER >= 17
244
245 _LIBCPP_POP_MACROS
246
247 #endif // _LIBCPP___ALGORITHM_PSTL_REPLACE_H
248