| //===----------------------------------------------------------------------===// |
| // |
| // 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_GENERATE_H |
| #define _LIBCPP___ALGORITHM_PSTL_GENERATE_H |
| |
| #include <__algorithm/pstl_for_each.h> |
| #include <__algorithm/pstl_frontend_dispatch.h> |
| #include <__config> |
| #include <__iterator/cpp17_iterator_concepts.h> |
| #include <__iterator/iterator_traits.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 <__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> |
| void __pstl_generate(); |
| |
| template <class _ExecutionPolicy, |
| class _ForwardIterator, |
| class _Generator, |
| class _RawPolicy = __remove_cvref_t<_ExecutionPolicy>, |
| enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0> |
| [[nodiscard]] _LIBCPP_HIDE_FROM_ABI optional<__empty> |
| __generate(_ExecutionPolicy&& __policy, _ForwardIterator&& __first, _ForwardIterator&& __last, _Generator&& __gen) { |
| return std::__pstl_frontend_dispatch( |
| _LIBCPP_PSTL_CUSTOMIZATION_POINT(__pstl_generate, _RawPolicy), |
| [&__policy](_ForwardIterator __g_first, _ForwardIterator __g_last, _Generator __g_gen) { |
| return std::__for_each( |
| __policy, std::move(__g_first), std::move(__g_last), [&](__iter_reference<_ForwardIterator> __element) { |
| __element = __g_gen(); |
| }); |
| }, |
| std::move(__first), |
| std::move(__last), |
| std::move(__gen)); |
| } |
| |
| template <class _ExecutionPolicy, |
| class _ForwardIterator, |
| class _Generator, |
| class _RawPolicy = __remove_cvref_t<_ExecutionPolicy>, |
| enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0> |
| _LIBCPP_HIDE_FROM_ABI void |
| generate(_ExecutionPolicy&& __policy, _ForwardIterator __first, _ForwardIterator __last, _Generator __gen) { |
| _LIBCPP_REQUIRE_CPP17_FORWARD_ITERATOR(_ForwardIterator, "generate requires ForwardIterators"); |
| if (!std::__generate(__policy, std::move(__first), std::move(__last), std::move(__gen))) |
| std::__throw_bad_alloc(); |
| } |
| |
| template <class> |
| void __pstl_generate_n(); |
| |
| template <class _ExecutionPolicy, |
| class _ForwardIterator, |
| class _Size, |
| class _Generator, |
| class _RawPolicy = __remove_cvref_t<_ExecutionPolicy>, |
| enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0> |
| [[nodiscard]] _LIBCPP_HIDE_FROM_ABI optional<__empty> |
| __generate_n(_ExecutionPolicy&& __policy, _ForwardIterator&& __first, _Size&& __n, _Generator&& __gen) { |
| return std::__pstl_frontend_dispatch( |
| _LIBCPP_PSTL_CUSTOMIZATION_POINT(__pstl_generate_n, _RawPolicy), |
| [&__policy](_ForwardIterator __g_first, _Size __g_n, _Generator __g_gen) { |
| return std::__for_each_n( |
| __policy, std::move(__g_first), std::move(__g_n), [&](__iter_reference<_ForwardIterator> __element) { |
| __element = __g_gen(); |
| }); |
| }, |
| std::move(__first), |
| __n, |
| std::move(__gen)); |
| } |
| |
| template <class _ExecutionPolicy, |
| class _ForwardIterator, |
| class _Size, |
| class _Generator, |
| class _RawPolicy = __remove_cvref_t<_ExecutionPolicy>, |
| enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0> |
| _LIBCPP_HIDE_FROM_ABI void |
| generate_n(_ExecutionPolicy&& __policy, _ForwardIterator __first, _Size __n, _Generator __gen) { |
| _LIBCPP_REQUIRE_CPP17_FORWARD_ITERATOR(_ForwardIterator, "generate_n requires a ForwardIterator"); |
| if (!std::__generate_n(__policy, std::move(__first), std::move(__n), std::move(__gen))) |
| 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_GENERATE_H |