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| 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 |
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