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_FIND_H
10 #define _LIBCPP___ALGORITHM_PSTL_FIND_H
11
12 #include <__algorithm/comp.h>
13 #include <__algorithm/find.h>
14 #include <__algorithm/pstl_backend.h>
15 #include <__algorithm/pstl_frontend_dispatch.h>
16 #include <__config>
17 #include <__iterator/cpp17_iterator_concepts.h>
18 #include <__type_traits/enable_if.h>
19 #include <__type_traits/is_execution_policy.h>
20 #include <__type_traits/remove_cvref.h>
21 #include <__utility/move.h>
22 #include <optional>
23
24 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
25 # pragma GCC system_header
26 #endif
27
28 _LIBCPP_PUSH_MACROS
29 #include <__undef_macros>
30
31 #if !defined(_LIBCPP_HAS_NO_INCOMPLETE_PSTL) && _LIBCPP_STD_VER >= 17
32
33 _LIBCPP_BEGIN_NAMESPACE_STD
34
35 template <class _ExecutionPolicy,
36 class _ForwardIterator,
37 class _Predicate,
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<__remove_cvref_t<_ForwardIterator>>
__find_if(_ExecutionPolicy &&,_ForwardIterator && __first,_ForwardIterator && __last,_Predicate && __pred)41 __find_if(_ExecutionPolicy&&, _ForwardIterator&& __first, _ForwardIterator&& __last, _Predicate&& __pred) noexcept {
42 using _Backend = typename __select_backend<_RawPolicy>::type;
43 return std::__pstl_find_if<_RawPolicy>(_Backend{}, std::move(__first), std::move(__last), std::move(__pred));
44 }
45
46 template <class _ExecutionPolicy,
47 class _ForwardIterator,
48 class _Predicate,
49 class _RawPolicy = __remove_cvref_t<_ExecutionPolicy>,
50 enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
51 _LIBCPP_HIDE_FROM_ABI _ForwardIterator
find_if(_ExecutionPolicy && __policy,_ForwardIterator __first,_ForwardIterator __last,_Predicate __pred)52 find_if(_ExecutionPolicy&& __policy, _ForwardIterator __first, _ForwardIterator __last, _Predicate __pred) {
53 _LIBCPP_REQUIRE_CPP17_FORWARD_ITERATOR(_ForwardIterator);
54 auto __res = std::__find_if(__policy, std::move(__first), std::move(__last), std::move(__pred));
55 if (!__res)
56 std::__throw_bad_alloc();
57 return *std::move(__res);
58 }
59
60 template <class>
61 void __pstl_find_if_not();
62
63 template <class _ExecutionPolicy,
64 class _ForwardIterator,
65 class _Predicate,
66 class _RawPolicy = __remove_cvref_t<_ExecutionPolicy>,
67 enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
68 [[nodiscard]] _LIBCPP_HIDE_FROM_ABI optional<__remove_cvref_t<_ForwardIterator>>
__find_if_not(_ExecutionPolicy && __policy,_ForwardIterator && __first,_ForwardIterator && __last,_Predicate && __pred)69 __find_if_not(_ExecutionPolicy&& __policy, _ForwardIterator&& __first, _ForwardIterator&& __last, _Predicate&& __pred) {
70 return std::__pstl_frontend_dispatch(
71 _LIBCPP_PSTL_CUSTOMIZATION_POINT(__pstl_find_if_not, _RawPolicy),
72 [&](_ForwardIterator&& __g_first, _ForwardIterator&& __g_last, _Predicate&& __g_pred)
73 -> optional<__remove_cvref_t<_ForwardIterator>> {
74 return std::__find_if(
75 __policy, __g_first, __g_last, [&](__iter_reference<__remove_cvref_t<_ForwardIterator>> __value) {
76 return !__g_pred(__value);
77 });
78 },
79 std::move(__first),
80 std::move(__last),
81 std::move(__pred));
82 }
83
84 template <class _ExecutionPolicy,
85 class _ForwardIterator,
86 class _Predicate,
87 class _RawPolicy = __remove_cvref_t<_ExecutionPolicy>,
88 enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
89 _LIBCPP_HIDE_FROM_ABI _ForwardIterator
find_if_not(_ExecutionPolicy && __policy,_ForwardIterator __first,_ForwardIterator __last,_Predicate __pred)90 find_if_not(_ExecutionPolicy&& __policy, _ForwardIterator __first, _ForwardIterator __last, _Predicate __pred) {
91 _LIBCPP_REQUIRE_CPP17_FORWARD_ITERATOR(_ForwardIterator);
92 auto __res = std::__find_if_not(__policy, std::move(__first), std::move(__last), std::move(__pred));
93 if (!__res)
94 std::__throw_bad_alloc();
95 return *std::move(__res);
96 }
97
98 template <class>
99 void __pstl_find();
100
101 template <class _ExecutionPolicy,
102 class _ForwardIterator,
103 class _Tp,
104 class _RawPolicy = __remove_cvref_t<_ExecutionPolicy>,
105 enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
106 [[nodiscard]] _LIBCPP_HIDE_FROM_ABI optional<__remove_cvref_t<_ForwardIterator>>
__find(_ExecutionPolicy && __policy,_ForwardIterator __first,_ForwardIterator __last,const _Tp & __value)107 __find(_ExecutionPolicy&& __policy, _ForwardIterator __first, _ForwardIterator __last, const _Tp& __value) noexcept {
108 return std::__pstl_frontend_dispatch(
109 _LIBCPP_PSTL_CUSTOMIZATION_POINT(__pstl_find, _RawPolicy),
110 [&](_ForwardIterator __g_first, _ForwardIterator __g_last, const _Tp& __g_value) -> optional<_ForwardIterator> {
111 return std::find_if(
112 __policy, __g_first, __g_last, [&](__iter_reference<__remove_cvref_t<_ForwardIterator>> __element) {
113 return __element == __g_value;
114 });
115 },
116 std::move(__first),
117 std::move(__last),
118 __value);
119 }
120
121 template <class _ExecutionPolicy,
122 class _ForwardIterator,
123 class _Tp,
124 class _RawPolicy = __remove_cvref_t<_ExecutionPolicy>,
125 enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
126 _LIBCPP_HIDE_FROM_ABI _ForwardIterator
find(_ExecutionPolicy && __policy,_ForwardIterator __first,_ForwardIterator __last,const _Tp & __value)127 find(_ExecutionPolicy&& __policy, _ForwardIterator __first, _ForwardIterator __last, const _Tp& __value) {
128 _LIBCPP_REQUIRE_CPP17_FORWARD_ITERATOR(_ForwardIterator);
129 auto __res = std::__find(__policy, std::move(__first), std::move(__last), __value);
130 if (!__res)
131 std::__throw_bad_alloc();
132 return *std::move(__res);
133 }
134
135 _LIBCPP_END_NAMESPACE_STD
136
137 #endif // !defined(_LIBCPP_HAS_NO_INCOMPLETE_PSTL) && _LIBCPP_STD_VER >= 17
138
139 _LIBCPP_POP_MACROS
140
141 #endif // _LIBCPP___ALGORITHM_PSTL_FIND_H
142