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 <__iterator/iterator_traits.h> 19 #include <__type_traits/enable_if.h> 20 #include <__type_traits/is_execution_policy.h> 21 #include <__type_traits/remove_cvref.h> 22 #include <__utility/move.h> 23 #include <__utility/terminate_on_exception.h> 24 25 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 26 # pragma GCC system_header 27 #endif 28 29 #if !defined(_LIBCPP_HAS_NO_INCOMPLETE_PSTL) && _LIBCPP_STD_VER >= 17 30 31 _LIBCPP_BEGIN_NAMESPACE_STD 32 33 template <class _ExecutionPolicy, 34 class _ForwardIterator, 35 class _Predicate, 36 class _RawPolicy = __remove_cvref_t<_ExecutionPolicy>, 37 enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0> 38 _LIBCPP_HIDE_FROM_ABI _ForwardIterator 39 find_if(_ExecutionPolicy&&, _ForwardIterator __first, _ForwardIterator __last, _Predicate __pred) { 40 _LIBCPP_REQUIRE_CPP17_FORWARD_ITERATOR(_ForwardIterator); 41 using _Backend = typename __select_backend<_RawPolicy>::type; 42 return std::__pstl_find_if<_RawPolicy>(_Backend{}, std::move(__first), std::move(__last), std::move(__pred)); 43 } 44 45 template <class> 46 void __pstl_find_if_not(); 47 48 template <class _ExecutionPolicy, 49 class _ForwardIterator, 50 class _Predicate, 51 class _RawPolicy = __remove_cvref_t<_ExecutionPolicy>, 52 enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0> 53 _LIBCPP_HIDE_FROM_ABI _ForwardIterator 54 find_if_not(_ExecutionPolicy&& __policy, _ForwardIterator __first, _ForwardIterator __last, _Predicate __pred) { 55 _LIBCPP_REQUIRE_CPP17_FORWARD_ITERATOR(_ForwardIterator); 56 return std::__pstl_frontend_dispatch( 57 _LIBCPP_PSTL_CUSTOMIZATION_POINT(__pstl_find_if_not), 58 [&](_ForwardIterator __g_first, _ForwardIterator __g_last, _Predicate __g_pred) { 59 return std::find_if(__policy, __g_first, __g_last, [&](__iter_reference<_ForwardIterator> __value) { 60 return !__g_pred(__value); 61 }); 62 }, 63 std::move(__first), 64 std::move(__last), 65 std::move(__pred)); 66 } 67 68 template <class> 69 void __pstl_find(); 70 71 template <class _ExecutionPolicy, 72 class _ForwardIterator, 73 class _Tp, 74 class _RawPolicy = __remove_cvref_t<_ExecutionPolicy>, 75 enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0> 76 _LIBCPP_HIDE_FROM_ABI _ForwardIterator 77 find(_ExecutionPolicy&& __policy, _ForwardIterator __first, _ForwardIterator __last, const _Tp& __value) { 78 _LIBCPP_REQUIRE_CPP17_FORWARD_ITERATOR(_ForwardIterator); 79 return std::__pstl_frontend_dispatch( 80 _LIBCPP_PSTL_CUSTOMIZATION_POINT(__pstl_find), 81 [&](_ForwardIterator __g_first, _ForwardIterator __g_last, const _Tp& __g_value) { 82 return std::find_if(__policy, __g_first, __g_last, [&](__iter_reference<_ForwardIterator> __element) { 83 return __element == __g_value; 84 }); 85 }, 86 std::move(__first), 87 std::move(__last), 88 __value); 89 } 90 91 _LIBCPP_END_NAMESPACE_STD 92 93 #endif // !defined(_LIBCPP_HAS_NO_INCOMPLETE_PSTL) && _LIBCPP_STD_VER >= 17 94 95 #endif // _LIBCPP___ALGORITHM_PSTL_FIND_H 96