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1// -*- C++ -*-2//===----------------------------------------------------------------------===//3//4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.5// See https://llvm.org/LICENSE.txt for license information.6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception7//8//===----------------------------------------------------------------------===//9 10#ifndef _LIBCPP___NUMERIC_REDUCE_H11#define _LIBCPP___NUMERIC_REDUCE_H12 13#include <__config>14#include <__functional/operations.h>15#include <__iterator/iterator_traits.h>16#include <__utility/move.h>17 18#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)19# pragma GCC system_header20#endif21 22_LIBCPP_PUSH_MACROS23#include <__undef_macros>24 25_LIBCPP_BEGIN_NAMESPACE_STD26 27#if _LIBCPP_STD_VER >= 1728template <class _InputIterator, class _Tp, class _BinaryOp>29_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _Tp30reduce(_InputIterator __first, _InputIterator __last, _Tp __init, _BinaryOp __b) {31 for (; __first != __last; ++__first)32 __init = __b(std::move(__init), *__first);33 return __init;34}35 36template <class _InputIterator, class _Tp>37_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _Tp38reduce(_InputIterator __first, _InputIterator __last, _Tp __init) {39 return std::reduce(__first, __last, __init, std::plus<>());40}41 42template <class _InputIterator>43_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 typename iterator_traits<_InputIterator>::value_type44reduce(_InputIterator __first, _InputIterator __last) {45 return std::reduce(__first, __last, typename iterator_traits<_InputIterator>::value_type{});46}47#endif48 49_LIBCPP_END_NAMESPACE_STD50 51_LIBCPP_POP_MACROS52 53#endif // _LIBCPP___NUMERIC_REDUCE_H54