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_BEGIN_NAMESPACE_STD 21 22 template <class _InputIterator1, class _InputIterator2, class _Tp> 23 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20 24 _Tp 25 inner_product(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _Tp __init) 26 { 27 for (; __first1 != __last1; ++__first1, (void) ++__first2) 28 #if _LIBCPP_STD_VER > 17 29 __init = _VSTD::move(__init) + *__first1 * *__first2; 30 #else 31 __init = __init + *__first1 * *__first2; 32 #endif 33 return __init; 34 } 35 36 template <class _InputIterator1, class _InputIterator2, class _Tp, class _BinaryOperation1, class _BinaryOperation2> 37 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20 38 _Tp 39 inner_product(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, 40 _Tp __init, _BinaryOperation1 __binary_op1, _BinaryOperation2 __binary_op2) 41 { 42 for (; __first1 != __last1; ++__first1, (void) ++__first2) 43 #if _LIBCPP_STD_VER > 17 44 __init = __binary_op1(_VSTD::move(__init), __binary_op2(*__first1, *__first2)); 45 #else 46 __init = __binary_op1(__init, __binary_op2(*__first1, *__first2)); 47 #endif 48 return __init; 49 } 50 51 _LIBCPP_END_NAMESPACE_STD 52 53 #endif // _LIBCPP___NUMERIC_INNER_PRODUCT_H 54