368faacac7
This commit reverts5aaefa51(and also partly7f285f48e7andb6d75682f9, which were related to the original commit). As landed,5aaefa51had unintended consequences on some downstream bots and didn't have proper coverage upstream due to a few subtle things. Implementing this is something we should do in libc++, however we'll first need to address a few issues listed in https://reviews.llvm.org/D106124#3349710. Differential Revision: https://reviews.llvm.org/D120683
50 lines
1.4 KiB
C++
50 lines
1.4 KiB
C++
// -*- C++ -*-
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//===----------------------------------------------------------------------===//
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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___NUMERIC_TRANSFORM_EXCLUSIVE_SCAN_H
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#define _LIBCPP___NUMERIC_TRANSFORM_EXCLUSIVE_SCAN_H
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#include <__config>
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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_BEGIN_NAMESPACE_STD
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#if _LIBCPP_STD_VER > 14
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template <class _InputIterator, class _OutputIterator, class _Tp,
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class _BinaryOp, class _UnaryOp>
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_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
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_OutputIterator
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transform_exclusive_scan(_InputIterator __first, _InputIterator __last,
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_OutputIterator __result, _Tp __init,
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_BinaryOp __b, _UnaryOp __u)
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{
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if (__first != __last)
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{
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_Tp __saved = __init;
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do
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{
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__init = __b(__init, __u(*__first));
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*__result = __saved;
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__saved = __init;
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++__result;
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} while (++__first != __last);
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}
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return __result;
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}
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#endif // _LIBCPP_STD_VER > 14
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_LIBCPP_END_NAMESPACE_STD
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#endif // _LIBCPP___NUMERIC_TRANSFORM_EXCLUSIVE_SCAN_H
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