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
inner_product(_InputIterator1 __first1,_InputIterator1 __last1,_InputIterator2 __first2,_Tp __init)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>
inner_product(_InputIterator1 __first1,_InputIterator1 __last1,_InputIterator2 __first2,_Tp __init,_BinaryOperation1 __binary_op1,_BinaryOperation2 __binary_op2)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