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_REDUCE_H
11 #define _LIBCPP___NUMERIC_REDUCE_H
12
13 #include <__config>
14 #include <__functional/operations.h>
15 #include <__iterator/iterator_traits.h>
16
17 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
18 # pragma GCC system_header
19 #endif
20
21 _LIBCPP_BEGIN_NAMESPACE_STD
22
23 #if _LIBCPP_STD_VER > 14
24 template <class _InputIterator, class _Tp, class _BinaryOp>
reduce(_InputIterator __first,_InputIterator __last,_Tp __init,_BinaryOp __b)25 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20 _Tp reduce(_InputIterator __first, _InputIterator __last,
26 _Tp __init, _BinaryOp __b) {
27 for (; __first != __last; ++__first)
28 __init = __b(__init, *__first);
29 return __init;
30 }
31
32 template <class _InputIterator, class _Tp>
reduce(_InputIterator __first,_InputIterator __last,_Tp __init)33 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20 _Tp reduce(_InputIterator __first, _InputIterator __last,
34 _Tp __init) {
35 return _VSTD::reduce(__first, __last, __init, _VSTD::plus<>());
36 }
37
38 template <class _InputIterator>
39 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20 typename iterator_traits<_InputIterator>::value_type
reduce(_InputIterator __first,_InputIterator __last)40 reduce(_InputIterator __first, _InputIterator __last) {
41 return _VSTD::reduce(__first, __last, typename iterator_traits<_InputIterator>::value_type{});
42 }
43 #endif
44
45 _LIBCPP_END_NAMESPACE_STD
46
47 #endif // _LIBCPP___NUMERIC_REDUCE_H
48