| //===----------------------------------------------------------------------===// |
| // |
| // 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_TRANSFORM_H |
| #define _LIBCPP___ALGORITHM_PSTL_TRANSFORM_H |
| |
| #include <__config> |
| #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 <__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 _ForwardOutIterator, |
| class _UnaryOperation, |
| class _RawPolicy = __remove_cvref_t<_ExecutionPolicy>, |
| enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0> |
| [[nodiscard]] _LIBCPP_HIDE_FROM_ABI optional<__remove_cvref_t<_ForwardOutIterator>> |
| __transform(_ExecutionPolicy&&, |
| _ForwardIterator&& __first, |
| _ForwardIterator&& __last, |
| _ForwardOutIterator&& __result, |
| _UnaryOperation&& __op) noexcept { |
| using _Backend = typename __select_backend<_RawPolicy>::type; |
| return std::__pstl_transform<_RawPolicy>( |
| _Backend{}, std::move(__first), std::move(__last), std::move(__result), std::move(__op)); |
| } |
| |
| template <class _ExecutionPolicy, |
| class _ForwardIterator, |
| class _ForwardOutIterator, |
| class _UnaryOperation, |
| class _RawPolicy = __remove_cvref_t<_ExecutionPolicy>, |
| enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0> |
| _LIBCPP_HIDE_FROM_ABI _ForwardOutIterator transform( |
| _ExecutionPolicy&& __policy, |
| _ForwardIterator __first, |
| _ForwardIterator __last, |
| _ForwardOutIterator __result, |
| _UnaryOperation __op) { |
| _LIBCPP_REQUIRE_CPP17_FORWARD_ITERATOR(_ForwardIterator, "transform requires ForwardIterators"); |
| _LIBCPP_REQUIRE_CPP17_FORWARD_ITERATOR(_ForwardOutIterator, "transform requires an OutputIterator"); |
| _LIBCPP_REQUIRE_CPP17_OUTPUT_ITERATOR( |
| _ForwardOutIterator, decltype(__op(*__first)), "transform requires an OutputIterator"); |
| auto __res = std::__transform(__policy, std::move(__first), std::move(__last), std::move(__result), std::move(__op)); |
| if (!__res) |
| std::__throw_bad_alloc(); |
| return *std::move(__res); |
| } |
| |
| template <class _ExecutionPolicy, |
| class _ForwardIterator1, |
| class _ForwardIterator2, |
| class _ForwardOutIterator, |
| class _BinaryOperation, |
| class _RawPolicy = __remove_cvref_t<_ExecutionPolicy>, |
| enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0> |
| _LIBCPP_HIDE_FROM_ABI optional<__remove_cvref_t<_ForwardOutIterator>> |
| __transform(_ExecutionPolicy&&, |
| _ForwardIterator1&& __first1, |
| _ForwardIterator1&& __last1, |
| _ForwardIterator2&& __first2, |
| _ForwardOutIterator&& __result, |
| _BinaryOperation&& __op) noexcept { |
| using _Backend = typename __select_backend<_RawPolicy>::type; |
| return std::__pstl_transform<_RawPolicy>( |
| _Backend{}, std::move(__first1), std::move(__last1), std::move(__first2), std::move(__result), std::move(__op)); |
| } |
| |
| template <class _ExecutionPolicy, |
| class _ForwardIterator1, |
| class _ForwardIterator2, |
| class _ForwardOutIterator, |
| class _BinaryOperation, |
| class _RawPolicy = __remove_cvref_t<_ExecutionPolicy>, |
| enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0> |
| _LIBCPP_HIDE_FROM_ABI _ForwardOutIterator transform( |
| _ExecutionPolicy&& __policy, |
| _ForwardIterator1 __first1, |
| _ForwardIterator1 __last1, |
| _ForwardIterator2 __first2, |
| _ForwardOutIterator __result, |
| _BinaryOperation __op) { |
| _LIBCPP_REQUIRE_CPP17_FORWARD_ITERATOR(_ForwardIterator1, "transform requires ForwardIterators"); |
| _LIBCPP_REQUIRE_CPP17_FORWARD_ITERATOR(_ForwardIterator2, "transform requires ForwardIterators"); |
| _LIBCPP_REQUIRE_CPP17_FORWARD_ITERATOR(_ForwardOutIterator, "transform requires an OutputIterator"); |
| _LIBCPP_REQUIRE_CPP17_OUTPUT_ITERATOR( |
| _ForwardOutIterator, decltype(__op(*__first1, *__first2)), "transform requires an OutputIterator"); |
| auto __res = std::__transform( |
| __policy, std::move(__first1), std::move(__last1), std::move(__first2), std::move(__result), std::move(__op)); |
| if (!__res) |
| std::__throw_bad_alloc(); |
| return *std::move(__res); |
| } |
| |
| _LIBCPP_END_NAMESPACE_STD |
| |
| #endif // !defined(_LIBCPP_HAS_NO_INCOMPLETE_PSTL) && _LIBCPP_STD_VER >= 17 |
| |
| _LIBCPP_POP_MACROS |
| |
| #endif // _LIBCPP___ALGORITHM_PSTL_TRANSFORM_H |