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
// Statements: if/for/foreach/while/do, switch/goto, try/catch/finally, lock, using, checked/unchecked, local scoping.
namespace Syntax.Statements;
class StmtRes : IDisposable
{
public void Dispose()
{
}
public void Touch()
{
}
}
class StmtGate
{
public object Sync = new();
public int Value;
}
class StmtError : Exception
{
public int Code;
}
class StmtUser
{
public void Run(int[] xs, StmtGate? gate)
{
int a = 1;
if (a == 1)
{
a = 2;
_ = gate?.Sync;
}
else if (a == 2)
{
a = 3;
}
else
{
a = 4;
}
for (int i = 0; i < xs.Length; i++)
{
if (xs[i] < 0)
{
continue;
}
if (xs[i] > 100)
{
break;
}
}
foreach (var x in xs)
{
_ = x;
}
foreach (int typed in xs)
{
_ = typed;
}
int w = 0;
while (w < 3)
{
w++;
}
do
{
w--;
}
while (w > 0);
switch (a)
{
case 1:
goto case 2;
case 2:
goto default;
default:
break;
}
label:
if (a > 10)
{
goto label;
}
try
{
if (a == 4)
{
throw new StmtError();
}
}
catch (StmtError e) when (e.Code > 0)
{
}
catch (Exception)
{
}
catch
{
}
finally
{
}
try
{
throw new StmtError();
}
catch
{
throw;
}
var g = gate ?? throw new StmtError();
lock (g.Sync)
{
g.Value++;
}
using (var r = new StmtRes())
{
r.Touch();
}
using var r2 = new StmtRes();
r2.Touch();
checked
{
int sum = a + w;
_ = sum;
}
unchecked
{
int sum = a + w;
_ = sum;
}
;
{
}
int cond = a > 0 ? 1 : 0;
int? maybe = null;
int coalesced = maybe ?? 0;
maybe ??= 5;
a += 1;
bool isNull = maybe is null;
string label2 = a switch
{
1 => "one",
_ => "other",
};
const int limit = 10;
int p = 1, q = 2;
_ = cond;
_ = coalesced;
_ = isNull;
_ = label2;
_ = limit;
_ = p;
_ = q;
}
public void Loops(Dictionary<int, StmtRes> map, List<StmtRes> list)
{
foreach (var inferred in list)
{
inferred.Touch();
}
foreach (StmtRes declared in list)
{
declared.Touch();
}
foreach (var pair in map)
{
pair.Value.Touch();
}
foreach (KeyValuePair<int, StmtRes> kv in map)
{
kv.Value.Touch();
}
}
}