1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
|
// -*- 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_REDUCE_H
#define _LIBCPP___NUMERIC_REDUCE_H
#include <__config>
#include <__functional/operations.h>
#include <__iterator/iterator_traits.h>
#include <__utility/move.h>
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
# pragma GCC system_header
#endif
_LIBCPP_BEGIN_NAMESPACE_STD
#if _LIBCPP_STD_VER >= 17
template <class _InputIterator, class _Tp, class _BinaryOp>
_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _Tp reduce(_InputIterator __first, _InputIterator __last,
_Tp __init, _BinaryOp __b) {
for (; __first != __last; ++__first)
__init = __b(std::move(__init), *__first);
return __init;
}
template <class _InputIterator, class _Tp>
_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _Tp reduce(_InputIterator __first, _InputIterator __last,
_Tp __init) {
return std::reduce(__first, __last, __init, std::plus<>());
}
template <class _InputIterator>
_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 typename iterator_traits<_InputIterator>::value_type
reduce(_InputIterator __first, _InputIterator __last) {
return std::reduce(__first, __last, typename iterator_traits<_InputIterator>::value_type{});
}
#endif
_LIBCPP_END_NAMESPACE_STD
#endif // _LIBCPP___NUMERIC_REDUCE_H
|
