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
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
|
// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#ifndef QTCONCURRENT_FUNCTIONWRAPPERS_H
#define QTCONCURRENT_FUNCTIONWRAPPERS_H
#include <QtConcurrent/qtconcurrentcompilertest.h>
#include <QtCore/qfuture.h>
#include <tuple>
#if !defined(QT_NO_CONCURRENT) || defined(Q_CLANG_QDOC)
QT_BEGIN_NAMESPACE
namespace QtPrivate {
struct PushBackWrapper
{
template <class C, class U>
inline void operator()(C &c, const U &u) const
{
return c.push_back(u);
}
template <class C, class U>
inline void operator()(C &c, U &&u) const
{
return c.push_back(u);
}
};
// -- MapResultType
template <class T, class Enable = void>
struct Argument
{
using Type = void;
};
template <class Sequence>
struct Argument<Sequence, typename std::enable_if<IsIterableValue<Sequence>>::type>
{
using Type = std::decay_t<decltype(*std::declval<Sequence>().begin())>;
};
template <class Iterator>
struct Argument<Iterator, typename std::enable_if<IsDereferenceableValue<Iterator>>::type>
{
using Type = std::decay_t<decltype(*std::declval<Iterator>())>;
};
template <class T>
using ArgumentType = typename Argument<T>::Type;
template <class T, class MapFunctor>
struct MapResult
{
static_assert(std::is_invocable_v<std::decay_t<MapFunctor>, ArgumentType<T>>,
"It's not possible to invoke the function with passed argument.");
using Type = std::invoke_result_t<std::decay_t<MapFunctor>, ArgumentType<T>>;
};
template <class T, class MapFunctor>
using MapResultType = typename MapResult<T, MapFunctor>::Type;
// -- ReduceResultType
template <class T>
struct ReduceResultType;
template <class U, class V>
struct ReduceResultType<void(*)(U&,V)>
{
using ResultType = U;
};
template <class T, class C, class U>
struct ReduceResultType<T(C::*)(U)>
{
using ResultType = C;
};
template <class U, class V>
struct ReduceResultType<std::function<void(U&, V)>>
{
using ResultType = U;
};
template <typename R, typename ...A>
struct ReduceResultType<R(*)(A...)>
{
using ResultType = typename std::tuple_element<0, std::tuple<A...>>::type;
};
template <class U, class V>
struct ReduceResultType<void(*)(U&,V) noexcept>
{
using ResultType = U;
};
template <class T, class C, class U>
struct ReduceResultType<T(C::*)(U) noexcept>
{
using ResultType = C;
};
template<class T, class Enable = void>
inline constexpr bool hasCallOperator_v = false;
template<class T>
inline constexpr bool hasCallOperator_v<T, std::void_t<decltype(&T::operator())>> = true;
template<class T, class Enable = void>
inline constexpr bool isIterator_v = false;
template<class T>
inline constexpr bool isIterator_v<T, std::void_t<typename std::iterator_traits<T>::value_type>> =
true;
template <class Callable, class Sequence>
using isInvocable = std::is_invocable<Callable, typename std::decay_t<Sequence>::value_type>;
template<class Callable, class Enable = void>
struct ReduceResultTypeHelper
{
};
template <class Callable>
struct ReduceResultTypeHelper<Callable,
typename std::enable_if_t<std::is_function_v<std::remove_pointer_t<std::decay_t<Callable>>>
|| std::is_member_function_pointer_v<std::decay_t<Callable>>>>
{
using type = typename QtPrivate::ReduceResultType<std::decay_t<Callable>>::ResultType;
};
template <class Callable>
struct ReduceResultTypeHelper<Callable,
typename std::enable_if_t<!std::is_function_v<std::remove_pointer_t<std::decay_t<Callable>>>
&& hasCallOperator_v<std::decay_t<Callable>>>>
{
using type = std::decay_t<typename QtPrivate::ArgResolver<Callable>::First>;
};
// -- MapSequenceResultType
template <class InputSequence, class MapFunctor>
struct MapSequenceResultType
{
static_assert(std::is_same_v<typename InputSequence::value_type,
QtPrivate::MapResultType<InputSequence, MapFunctor>>,
"Couldn't deduce the output sequence type, you must specify it explicitly.");
typedef InputSequence ResultType;
};
#ifndef QT_NO_TEMPLATE_TEMPLATE_PARAMETERS
template <template <typename...> class InputSequence, typename MapFunctor, typename ...T>
struct MapSequenceResultType<InputSequence<T...>, MapFunctor>
{
typedef InputSequence<QtPrivate::MapResultType<InputSequence<T...>, MapFunctor>> ResultType;
};
#endif // QT_NO_TEMPLATE_TEMPLATE_PARAMETER
template<typename Sequence>
struct SequenceHolder
{
SequenceHolder(const Sequence &s) : sequence(s) { }
SequenceHolder(Sequence &&s) : sequence(std::move(s)) { }
Sequence sequence;
};
} // namespace QtPrivate.
QT_END_NAMESPACE
#endif // QT_NO_CONCURRENT
#endif
|
