60 lines · c
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_TRANSFORM_REDUCE_H11#define _LIBCPP___NUMERIC_TRANSFORM_REDUCE_H12 13#include <__config>14#include <__functional/operations.h>15#include <__utility/move.h>16 17#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)18# pragma GCC system_header19#endif20 21_LIBCPP_PUSH_MACROS22#include <__undef_macros>23 24_LIBCPP_BEGIN_NAMESPACE_STD25 26#if _LIBCPP_STD_VER >= 1727template <class _InputIterator, class _Tp, class _BinaryOp, class _UnaryOp>28_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _Tp29transform_reduce(_InputIterator __first, _InputIterator __last, _Tp __init, _BinaryOp __b, _UnaryOp __u) {30 for (; __first != __last; ++__first)31 __init = __b(std::move(__init), __u(*__first));32 return __init;33}34 35template <class _InputIterator1, class _InputIterator2, class _Tp, class _BinaryOp1, class _BinaryOp2>36_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _Tp transform_reduce(37 _InputIterator1 __first1,38 _InputIterator1 __last1,39 _InputIterator2 __first2,40 _Tp __init,41 _BinaryOp1 __b1,42 _BinaryOp2 __b2) {43 for (; __first1 != __last1; ++__first1, (void)++__first2)44 __init = __b1(std::move(__init), __b2(*__first1, *__first2));45 return __init;46}47 48template <class _InputIterator1, class _InputIterator2, class _Tp>49_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _Tp50transform_reduce(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _Tp __init) {51 return std::transform_reduce(__first1, __last1, __first2, std::move(__init), std::plus<>(), std::multiplies<>());52}53#endif54 55_LIBCPP_END_NAMESPACE_STD56 57_LIBCPP_POP_MACROS58 59#endif // _LIBCPP___NUMERIC_TRANSFORM_REDUCE_H60