| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef _LIBCPP___ALGORITHM_PSTL_FOR_EACH_H |
| #define _LIBCPP___ALGORITHM_PSTL_FOR_EACH_H |
| |
| #include <__algorithm/for_each.h> |
| #include <__algorithm/for_each_n.h> |
| #include <__algorithm/pstl_frontend_dispatch.h> |
| #include <__config> |
| #include <__iterator/concepts.h> |
| #include <__iterator/cpp17_iterator_concepts.h> |
| #include <__pstl/configuration.h> |
| #include <__type_traits/enable_if.h> |
| #include <__type_traits/is_execution_policy.h> |
| #include <__type_traits/remove_cvref.h> |
| #include <__type_traits/void_t.h> |
| #include <__utility/empty.h> |
| #include <__utility/move.h> |
| #include <optional> |
| |
| #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| # pragma GCC system_header |
| #endif |
| |
| _LIBCPP_PUSH_MACROS |
| #include <__undef_macros> |
| |
| #if !defined(_LIBCPP_HAS_NO_INCOMPLETE_PSTL) && _LIBCPP_STD_VER >= 17 |
| |
| _LIBCPP_BEGIN_NAMESPACE_STD |
| |
| template <class _ExecutionPolicy, |
| class _ForwardIterator, |
| class _Function, |
| class _RawPolicy = __remove_cvref_t<_ExecutionPolicy>, |
| enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0> |
| [[nodiscard]] _LIBCPP_HIDE_FROM_ABI optional<__empty> |
| __for_each(_ExecutionPolicy&&, _ForwardIterator&& __first, _ForwardIterator&& __last, _Function&& __func) noexcept { |
| using _Backend = typename __select_backend<_RawPolicy>::type; |
| return std::__pstl_for_each<_RawPolicy>(_Backend{}, std::move(__first), std::move(__last), std::move(__func)); |
| } |
| |
| template <class _ExecutionPolicy, |
| class _ForwardIterator, |
| class _Function, |
| class _RawPolicy = __remove_cvref_t<_ExecutionPolicy>, |
| enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0> |
| _LIBCPP_HIDE_FROM_ABI void |
| for_each(_ExecutionPolicy&& __policy, _ForwardIterator __first, _ForwardIterator __last, _Function __func) { |
| _LIBCPP_REQUIRE_CPP17_FORWARD_ITERATOR(_ForwardIterator, "for_each requires ForwardIterators"); |
| if (!std::__for_each(__policy, std::move(__first), std::move(__last), std::move(__func))) |
| std::__throw_bad_alloc(); |
| } |
| |
| template <class> |
| void __pstl_for_each_n(); // declaration needed for the frontend dispatch below |
| |
| template <class _ExecutionPolicy, |
| class _ForwardIterator, |
| class _Size, |
| class _Function, |
| class _RawPolicy = __remove_cvref_t<_ExecutionPolicy>, |
| enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0> |
| [[nodiscard]] _LIBCPP_HIDE_FROM_ABI optional<__empty> |
| __for_each_n(_ExecutionPolicy&& __policy, _ForwardIterator&& __first, _Size&& __size, _Function&& __func) noexcept { |
| return std::__pstl_frontend_dispatch( |
| _LIBCPP_PSTL_CUSTOMIZATION_POINT(__pstl_for_each_n, _RawPolicy), |
| [&](_ForwardIterator __g_first, _Size __g_size, _Function __g_func) -> optional<__empty> { |
| if constexpr (__has_random_access_iterator_category_or_concept<_ForwardIterator>::value) { |
| std::for_each(__policy, std::move(__g_first), __g_first + __g_size, std::move(__g_func)); |
| return __empty{}; |
| } else { |
| std::for_each_n(std::move(__g_first), __g_size, std::move(__g_func)); |
| return __empty{}; |
| } |
| }, |
| std::move(__first), |
| std::move(__size), |
| std::move(__func)); |
| } |
| |
| template <class _ExecutionPolicy, |
| class _ForwardIterator, |
| class _Size, |
| class _Function, |
| class _RawPolicy = __remove_cvref_t<_ExecutionPolicy>, |
| enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0> |
| _LIBCPP_HIDE_FROM_ABI void |
| for_each_n(_ExecutionPolicy&& __policy, _ForwardIterator __first, _Size __size, _Function __func) { |
| _LIBCPP_REQUIRE_CPP17_FORWARD_ITERATOR(_ForwardIterator, "for_each_n requires a ForwardIterator"); |
| auto __res = std::__for_each_n(__policy, std::move(__first), std::move(__size), std::move(__func)); |
| if (!__res) |
| std::__throw_bad_alloc(); |
| } |
| |
| _LIBCPP_END_NAMESPACE_STD |
| |
| #endif // !defined(_LIBCPP_HAS_NO_INCOMPLETE_PSTL) && _LIBCPP_STD_VER >= 17 |
| |
| _LIBCPP_POP_MACROS |
| |
| #endif // _LIBCPP___ALGORITHM_PSTL_FOR_EACH_H |