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_TRANSFORM_REDUCE_H 11 #define _LIBCPP___NUMERIC_TRANSFORM_REDUCE_H 12 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_header 19 #endif 20 21 _LIBCPP_BEGIN_NAMESPACE_STD 22 23 #if _LIBCPP_STD_VER >= 17 24 template <class _InputIterator, class _Tp, class _BinaryOp, class _UnaryOp> 25 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _Tp 26 transform_reduce(_InputIterator __first, _InputIterator __last, _Tp __init, _BinaryOp __b, _UnaryOp __u) { 27 for (; __first != __last; ++__first) 28 __init = __b(std::move(__init), __u(*__first)); 29 return __init; 30 } 31 32 template <class _InputIterator1, class _InputIterator2, class _Tp, class _BinaryOp1, class _BinaryOp2> 33 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _Tp transform_reduce( 34 _InputIterator1 __first1, 35 _InputIterator1 __last1, 36 _InputIterator2 __first2, 37 _Tp __init, 38 _BinaryOp1 __b1, 39 _BinaryOp2 __b2) { 40 for (; __first1 != __last1; ++__first1, (void)++__first2) 41 __init = __b1(std::move(__init), __b2(*__first1, *__first2)); 42 return __init; 43 } 44 45 template <class _InputIterator1, class _InputIterator2, class _Tp> 46 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _Tp 47 transform_reduce(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _Tp __init) { 48 return std::transform_reduce(__first1, __last1, __first2, std::move(__init), std::plus<>(), std::multiplies<>()); 49 } 50 #endif 51 52 _LIBCPP_END_NAMESPACE_STD 53 54 #endif // _LIBCPP___NUMERIC_TRANSFORM_REDUCE_H 55