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
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
|
/*
* Copyright 2008-2021 NVIDIA Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include <thrust/detail/config.h>
#include <thrust/iterator/transform_output_iterator.h>
#include <thrust/iterator/iterator_adaptor.h>
THRUST_NAMESPACE_BEGIN
template <typename UnaryFunction, typename OutputIterator>
class transform_output_iterator;
namespace detail
{
// Proxy reference that uses Unary Function to transform the rhs of assigment
// operator before writing the result to OutputIterator
template <typename UnaryFunction, typename OutputIterator>
class transform_output_iterator_proxy
{
public:
__host__ __device__
transform_output_iterator_proxy(const OutputIterator& out, UnaryFunction fun) : out(out), fun(fun)
{
}
__thrust_exec_check_disable__
template <typename T>
__host__ __device__
transform_output_iterator_proxy operator=(const T& x)
{
*out = fun(x);
return *this;
}
private:
OutputIterator out;
UnaryFunction fun;
};
// Compute the iterator_adaptor instantiation to be used for transform_output_iterator
template <typename UnaryFunction, typename OutputIterator>
struct transform_output_iterator_base
{
typedef thrust::iterator_adaptor
<
transform_output_iterator<UnaryFunction, OutputIterator>
, OutputIterator
, thrust::use_default
, thrust::use_default
, thrust::use_default
, transform_output_iterator_proxy<UnaryFunction, OutputIterator>
> type;
};
// Register transform_output_iterator_proxy with 'is_proxy_reference' from
// type_traits to enable its use with algorithms.
template <class UnaryFunction, class OutputIterator>
struct is_proxy_reference<
transform_output_iterator_proxy<UnaryFunction, OutputIterator> >
: public thrust::detail::true_type {};
} // end detail
THRUST_NAMESPACE_END
|
