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_PUSH_MACROS 22 #include <__undef_macros> 23 24 _LIBCPP_BEGIN_NAMESPACE_STD 25 26 #if _LIBCPP_STD_VER >= 17 27 template <class _InputIterator, class _Tp, class _BinaryOp, class _UnaryOp> 28 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _Tp 29 transform_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 35 template <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 48 template <class _InputIterator1, class _InputIterator2, class _Tp> 49 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _Tp 50 transform_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 #endif 54 55 _LIBCPP_END_NAMESPACE_STD 56 57 _LIBCPP_POP_MACROS 58 59 #endif // _LIBCPP___NUMERIC_TRANSFORM_REDUCE_H 60