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368faacac7
This commit reverts 5aaefa51 (and also partly 7f285f48e77 and b6d75682f9, which were related to the original commit). As landed, 5aaefa51 had 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
48 lines
1.7 KiB
C++
48 lines
1.7 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_REDUCE_H
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#define _LIBCPP___NUMERIC_REDUCE_H
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#include <__config>
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#include <__functional/operations.h>
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#include <__iterator/iterator_traits.h>
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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 _Tp, class _BinaryOp>
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_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 _Tp reduce(_InputIterator __first, _InputIterator __last,
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_Tp __init, _BinaryOp __b) {
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for (; __first != __last; ++__first)
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__init = __b(__init, *__first);
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return __init;
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}
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template <class _InputIterator, class _Tp>
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_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 _Tp reduce(_InputIterator __first, _InputIterator __last,
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_Tp __init) {
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return _VSTD::reduce(__first, __last, __init, _VSTD::plus<>());
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}
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template <class _InputIterator>
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_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 typename iterator_traits<_InputIterator>::value_type
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reduce(_InputIterator __first, _InputIterator __last) {
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return _VSTD::reduce(__first, __last, typename iterator_traits<_InputIterator>::value_type{});
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}
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#endif
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_LIBCPP_END_NAMESPACE_STD
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#endif // _LIBCPP___NUMERIC_REDUCE_H
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