| // -*- C++ -*- |
| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef _LIBCPP___NUMERIC_INNER_PRODUCT_H |
| #define _LIBCPP___NUMERIC_INNER_PRODUCT_H |
| |
| #include <__config> |
| #include <__utility/move.h> |
| |
| #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| # pragma GCC system_header |
| #endif |
| |
| _LIBCPP_BEGIN_NAMESPACE_STD |
| |
| template <class _InputIterator1, class _InputIterator2, class _Tp> |
| _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 |
| _Tp |
| inner_product(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _Tp __init) |
| { |
| for (; __first1 != __last1; ++__first1, (void) ++__first2) |
| #if _LIBCPP_STD_VER > 17 |
| __init = _VSTD::move(__init) + *__first1 * *__first2; |
| #else |
| __init = __init + *__first1 * *__first2; |
| #endif |
| return __init; |
| } |
| |
| template <class _InputIterator1, class _InputIterator2, class _Tp, class _BinaryOperation1, class _BinaryOperation2> |
| _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 |
| _Tp |
| inner_product(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, |
| _Tp __init, _BinaryOperation1 __binary_op1, _BinaryOperation2 __binary_op2) |
| { |
| for (; __first1 != __last1; ++__first1, (void) ++__first2) |
| #if _LIBCPP_STD_VER > 17 |
| __init = __binary_op1(_VSTD::move(__init), __binary_op2(*__first1, *__first2)); |
| #else |
| __init = __binary_op1(__init, __binary_op2(*__first1, *__first2)); |
| #endif |
| return __init; |
| } |
| |
| _LIBCPP_END_NAMESPACE_STD |
| |
| #endif // _LIBCPP___NUMERIC_INNER_PRODUCT_H |
