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
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
|
// Copyright (c) AlphaSierraPapa for the SharpDevelop Team
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of this
// software and associated documentation files (the "Software"), to deal in the Software
// without restriction, including without limitation the rights to use, copy, modify, merge,
// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
// to whom the Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all copies or
// substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
using System;
using System.Collections.Generic;
using System.Linq;
public static class DelegateConstruction
{
class InstanceTests
{
public Action CaptureOfThis()
{
return delegate {
CaptureOfThis();
};
}
public Action CaptureOfThisAndParameter(int a)
{
return delegate {
CaptureOfThisAndParameter(a);
};
}
public Action CaptureOfThisAndParameterInForEach(int a)
{
foreach (int item in Enumerable.Empty<int>()) {
if (item > 0) {
return delegate {
CaptureOfThisAndParameter(item + a);
};
}
}
return null;
}
public Action CaptureOfThisAndParameterInForEachWithItemCopy(int a)
{
foreach (int item in Enumerable.Empty<int>()) {
int copyOfItem = item;
if (item > 0) {
return delegate {
CaptureOfThisAndParameter(item + a + copyOfItem);
};
}
}
return null;
}
public void LambdaInForLoop()
{
for (int i = 0; i < 100000; i++) {
Bar(() => Foo());
}
}
public int Foo()
{
return 0;
}
public void Bar(Func<int> f)
{
}
}
public static void Test(this string a)
{
}
public static Action<string> ExtensionMethodUnbound()
{
return new Action<string>(DelegateConstruction.Test);
}
public static Action ExtensionMethodBound()
{
return new Action("abc".Test);
}
public static Action ExtensionMethodBoundOnNull()
{
return new Action(((string)null).Test);
}
public static object StaticMethod()
{
return new Func<Action>(DelegateConstruction.ExtensionMethodBound);
}
public static object InstanceMethod()
{
return new Func<string>("hello".ToUpper);
}
public static object InstanceMethodOnNull()
{
return new Func<string>(((string)null).ToUpper);
}
public static List<Action<int>> AnonymousMethodStoreWithinLoop()
{
List<Action<int>> list = new List<Action<int>>();
for (int i = 0; i < 10; i++)
{
int counter;
list.Add(delegate(int x)
{
counter = x;
}
);
}
return list;
}
public static List<Action<int>> AnonymousMethodStoreOutsideLoop()
{
List<Action<int>> list = new List<Action<int>>();
int counter;
for (int i = 0; i < 10; i++)
{
list.Add(delegate(int x)
{
counter = x;
}
);
}
return list;
}
public static Action StaticAnonymousMethodNoClosure()
{
return delegate
{
Console.WriteLine();
};
}
public static void NameConflict()
{
// i is captured variable,
// j is parameter in anonymous method
// k is local in anonymous method,
// l is local in main method
// Ensure that the decompiler doesn't introduce name conflicts
List<Action<int>> list = new List<Action<int>>();
for (int l = 0; l < 10; l++) {
int i;
for (i = 0; i < 10; i++) {
list.Add(
delegate (int j) {
for (int k = 0; k < i; k += j) {
Console.WriteLine();
}
});
}
}
}
public static void NameConflict2(int j)
{
List<Action<int>> list = new List<Action<int>>();
for (int k = 0; k < 10; k++) {
list.Add(
delegate(int i) {
Console.WriteLine(i);
});
}
}
public static Action<int> NameConflict3(int i)
{
return delegate(int j) {
for (int k = 0; k < j; k++) {
Console.WriteLine(k);
}
};
}
public static Func<int, Func<int, int>> CurriedAddition(int a)
{
return b => c => a + b + c;
}
public static Func<int, Func<int, Func<int, int>>> CurriedAddition2(int a)
{
return b => c => d => a + b + c + d;
}
}
|
