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-exception 7// 8//===----------------------------------------------------------------------===// 9 10#ifndef _LIBCPP___NUMERIC_REDUCE_H 11#define _LIBCPP___NUMERIC_REDUCE_H 12 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_header 20#endif 21 22_LIBCPP_PUSH_MACROS 23#include <__undef_macros> 24 25_LIBCPP_BEGIN_NAMESPACE_STD 26 27#if _LIBCPP_STD_VER >= 17 28template <class _InputIterator, class _Tp, class _BinaryOp> 29_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _Tp 30reduce(_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 _Tp 38reduce(_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_type 44reduce(_InputIterator __first, _InputIterator __last) { 45 return std::reduce(__first, __last, typename iterator_traits<_InputIterator>::value_type{}); 46} 47#endif 48 49_LIBCPP_END_NAMESPACE_STD 50 51_LIBCPP_POP_MACROS 52 53#endif // _LIBCPP___NUMERIC_REDUCE_H 54