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_INNER_PRODUCT_H 11 #define _LIBCPP___NUMERIC_INNER_PRODUCT_H 12 13 #include <__config> 14 #include <__utility/move.h> 15 16 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 17 # pragma GCC system_header 18 #endif 19 20 _LIBCPP_PUSH_MACROS 21 #include <__undef_macros> 22 23 _LIBCPP_BEGIN_NAMESPACE_STD 24 25 template <class _InputIterator1, class _InputIterator2, class _Tp> 26 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _Tp 27 inner_product(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _Tp __init) { 28 for (; __first1 != __last1; ++__first1, (void)++__first2) 29 #if _LIBCPP_STD_VER >= 20 30 __init = std::move(__init) + *__first1 * *__first2; 31 #else 32 __init = __init + *__first1 * *__first2; 33 #endif 34 return __init; 35 } 36 37 template <class _InputIterator1, class _InputIterator2, class _Tp, class _BinaryOperation1, class _BinaryOperation2> 38 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _Tp inner_product( 39 _InputIterator1 __first1, 40 _InputIterator1 __last1, 41 _InputIterator2 __first2, 42 _Tp __init, 43 _BinaryOperation1 __binary_op1, 44 _BinaryOperation2 __binary_op2) { 45 for (; __first1 != __last1; ++__first1, (void)++__first2) 46 #if _LIBCPP_STD_VER >= 20 47 __init = __binary_op1(std::move(__init), __binary_op2(*__first1, *__first2)); 48 #else 49 __init = __binary_op1(__init, __binary_op2(*__first1, *__first2)); 50 #endif 51 return __init; 52 } 53 54 _LIBCPP_END_NAMESPACE_STD 55 56 _LIBCPP_POP_MACROS 57 58 #endif // _LIBCPP___NUMERIC_INNER_PRODUCT_H 59