bd3f5a4bd3
There were various places where we incorrectly handled exceptions in the PSTL. Typical issues were missing `noexcept` and taking iterators by value instead of by reference. This patch fixes those inconsistent and incorrect instances, and adds proper tests for all of those. Note that the previous tests were often incorrectly turned into no-ops by the compiler due to copy ellision, which doesn't happen with these new tests.
80 lines
2.9 KiB
C++
80 lines
2.9 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef _LIBCPP___ALGORITHM_PSTL_IS_PARITTIONED
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#define _LIBCPP___ALGORITHM_PSTL_IS_PARITTIONED
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#include <__algorithm/pstl_any_all_none_of.h>
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#include <__algorithm/pstl_find.h>
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#include <__algorithm/pstl_frontend_dispatch.h>
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#include <__config>
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#include <__iterator/cpp17_iterator_concepts.h>
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#include <__pstl/configuration.h>
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#include <__type_traits/enable_if.h>
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#include <__type_traits/is_execution_policy.h>
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#include <__type_traits/remove_cvref.h>
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#include <__utility/move.h>
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#include <optional>
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#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
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# pragma GCC system_header
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#endif
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_LIBCPP_PUSH_MACROS
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#include <__undef_macros>
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#if !defined(_LIBCPP_HAS_NO_INCOMPLETE_PSTL) && _LIBCPP_STD_VER >= 17
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_LIBCPP_BEGIN_NAMESPACE_STD
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template <class>
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void __pstl_is_partitioned();
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template <class _ExecutionPolicy,
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class _ForwardIterator,
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class _Predicate,
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class _RawPolicy = __remove_cvref_t<_ExecutionPolicy>,
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enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
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[[nodiscard]] _LIBCPP_HIDE_FROM_ABI optional<bool> __is_partitioned(
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_ExecutionPolicy&& __policy, _ForwardIterator&& __first, _ForwardIterator&& __last, _Predicate&& __pred) noexcept {
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return std::__pstl_frontend_dispatch(
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_LIBCPP_PSTL_CUSTOMIZATION_POINT(__pstl_is_partitioned, _RawPolicy),
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[&__policy](_ForwardIterator __g_first, _ForwardIterator __g_last, _Predicate __g_pred) {
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__g_first = std::find_if_not(__policy, __g_first, __g_last, __g_pred);
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if (__g_first == __g_last)
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return true;
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++__g_first;
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return std::none_of(__policy, __g_first, __g_last, __g_pred);
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},
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std::move(__first),
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std::move(__last),
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std::move(__pred));
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}
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template <class _ExecutionPolicy,
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class _ForwardIterator,
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class _Predicate,
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class _RawPolicy = __remove_cvref_t<_ExecutionPolicy>,
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enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
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_LIBCPP_NODISCARD _LIBCPP_HIDE_FROM_ABI bool
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is_partitioned(_ExecutionPolicy&& __policy, _ForwardIterator __first, _ForwardIterator __last, _Predicate __pred) {
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_LIBCPP_REQUIRE_CPP17_FORWARD_ITERATOR(_ForwardIterator, "is_partitioned requires ForwardIterators");
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auto __res = std::__is_partitioned(__policy, std::move(__first), std::move(__last), std::move(__pred));
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if (!__res)
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std::__throw_bad_alloc();
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return *std::move(__res);
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}
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_LIBCPP_END_NAMESPACE_STD
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#endif // !defined(_LIBCPP_HAS_NO_INCOMPLETE_PSTL) && _LIBCPP_STD_VER >= 17
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_LIBCPP_POP_MACROS
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#endif // _LIBCPP___ALGORITHM_PSTL_IS_PARITTIONED
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