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
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
|
// RUN: %clang_cc1 -fsyntax-only -Wcomma -std=c++11 -verify %s
// RUN: %clang_cc1 -fsyntax-only -Wcomma -std=c++11 -fdiagnostics-parseable-fixits %s 2>&1 | FileCheck %s
// Test builtin operators
void test1() {
int x = 0, y = 0;
for (; y < 10; x++, y++) {}
for (; y < 10; ++x, y++) {}
for (; y < 10; x++, ++y) {}
for (; y < 10; ++x, ++y) {}
for (; y < 10; x--, ++y) {}
for (; y < 10; --x, ++y) {}
for (; y < 10; x = 5, ++y) {}
for (; y < 10; x *= 5, ++y) {}
for (; y < 10; x /= 5, ++y) {}
for (; y < 10; x %= 5, ++y) {}
for (; y < 10; x += 5, ++y) {}
for (; y < 10; x -= 5, ++y) {}
for (; y < 10; x <<= 5, ++y) {}
for (; y < 10; x >>= 5, ++y) {}
for (; y < 10; x &= 5, ++y) {}
for (; y < 10; x |= 5, ++y) {}
for (; y < 10; x ^= 5, ++y) {}
}
class S2 {
public:
void advance();
S2 operator++();
S2 operator++(int);
S2 operator--();
S2 operator--(int);
S2 operator=(int);
S2 operator*=(int);
S2 operator/=(int);
S2 operator%=(int);
S2 operator+=(int);
S2 operator-=(int);
S2 operator<<=(int);
S2 operator>>=(int);
S2 operator&=(int);
S2 operator|=(int);
S2 operator^=(int);
};
// Test overloaded operators
void test2() {
S2 x;
int y;
for (; y < 10; x++, y++) {}
for (; y < 10; ++x, y++) {}
for (; y < 10; x++, ++y) {}
for (; y < 10; ++x, ++y) {}
for (; y < 10; x--, ++y) {}
for (; y < 10; --x, ++y) {}
for (; y < 10; x = 5, ++y) {}
for (; y < 10; x *= 5, ++y) {}
for (; y < 10; x /= 5, ++y) {}
for (; y < 10; x %= 5, ++y) {}
for (; y < 10; x += 5, ++y) {}
for (; y < 10; x -= 5, ++y) {}
for (; y < 10; x <<= 5, ++y) {}
for (; y < 10; x >>= 5, ++y) {}
for (; y < 10; x &= 5, ++y) {}
for (; y < 10; x |= 5, ++y) {}
for (; y < 10; x ^= 5, ++y) {}
}
// Test nested comma operators
void test3() {
int x1, x2, x3;
int y1, *y2 = 0, y3 = 5;
for (int z1 = 5, z2 = 4, z3 = 3; x1 <4; ++x1) {}
}
class Stream {
public:
Stream& operator<<(int);
} cout;
int return_four() { return 5; }
// Confusing "," for "<<"
void test4() {
cout << 5 << return_four();
cout << 5, return_four();
// expected-warning@-1{{comma operator}}
// expected-note@-2{{cast expression to void}}
// CHECK: fix-it:{{.*}}:{[[@LINE-3]]:3-[[@LINE-3]]:3}:"static_cast<void>("
// CHECK: fix-it:{{.*}}:{[[@LINE-4]]:12-[[@LINE-4]]:12}:")"
}
// Confusing "," for "=="
void test5() {
if (return_four(), 5) {}
// expected-warning@-1{{comma operator}}
// expected-note@-2{{cast expression to void}}
// CHECK: fix-it:{{.*}}:{[[@LINE-3]]:7-[[@LINE-3]]:7}:"static_cast<void>("
// CHECK: fix-it:{{.*}}:{[[@LINE-4]]:20-[[@LINE-4]]:20}:")"
if (return_four() == 5) {}
}
// Confusing "," for "+"
int test6() {
return return_four(), return_four();
// expected-warning@-1{{comma operator}}
// expected-note@-2{{cast expression to void}}
// CHECK: fix-it:{{.*}}:{[[@LINE-3]]:10-[[@LINE-3]]:10}:"static_cast<void>("
// CHECK: fix-it:{{.*}}:{[[@LINE-4]]:23-[[@LINE-4]]:23}:")"
return return_four() + return_four();
}
void Concat(int);
void Concat(int, int);
// Testing extra parentheses in function call
void test7() {
Concat((return_four() , 5));
// expected-warning@-1{{comma operator}}
// expected-note@-2{{cast expression to void}}
// CHECK: fix-it:{{.*}}:{[[@LINE-3]]:11-[[@LINE-3]]:11}:"static_cast<void>("
// CHECK: fix-it:{{.*}}:{[[@LINE-4]]:24-[[@LINE-4]]:24}:")"
Concat(return_four() , 5);
}
// Be sure to look through parentheses
void test8() {
int x, y;
for (x = 0; return_four(), x;) {}
// expected-warning@-1{{comma operator}}
// expected-note@-2{{cast expression to void}}
// CHECK: fix-it:{{.*}}:{[[@LINE-3]]:15-[[@LINE-3]]:15}:"static_cast<void>("
// CHECK: fix-it:{{.*}}:{[[@LINE-4]]:28-[[@LINE-4]]:28}:")"
for (x = 0; (return_four()), (x) ;) {}
// expected-warning@-1{{comma operator}}
// expected-note@-2{{cast expression to void}}
// CHECK: fix-it:{{.*}}:{[[@LINE-3]]:15-[[@LINE-3]]:15}:"static_cast<void>("
// CHECK: fix-it:{{.*}}:{[[@LINE-4]]:30-[[@LINE-4]]:30}:")"
}
bool DoStuff();
class S9 {
public:
bool Advance();
bool More();
};
// Ignore comma operator in for-loop initializations and increments.
void test9() {
int x, y;
for (x = 0, y = 5; x < y; ++x) {}
for (x = 0; x < 10; DoStuff(), ++x) {}
for (S9 s; s.More(); s.Advance(), ++x) {}
}
void test10() {
int x, y;
++x, ++y;
// expected-warning@-1{{comma operator}}
// expected-note@-2{{cast expression to void}}
// CHECK: fix-it:{{.*}}:{[[@LINE-3]]:3-[[@LINE-3]]:3}:"static_cast<void>("
// CHECK: fix-it:{{.*}}:{[[@LINE-4]]:6-[[@LINE-4]]:6}:")"
}
// Ignore comma operator in templates.
namespace test11 {
template <bool T>
struct B { static const bool value = T; };
typedef B<true> true_type;
typedef B<false> false_type;
template <bool...>
struct bool_seq;
template <typename... xs>
class Foo {
typedef bool_seq<(xs::value, true)...> all_true;
typedef bool_seq<(xs::value, false)...> all_false;
typedef bool_seq<xs::value...> seq;
};
const auto X = Foo<true_type>();
}
namespace test12 {
class Mutex {
public:
Mutex();
~Mutex();
};
class MutexLock {
public:
MutexLock(Mutex &);
MutexLock();
~MutexLock();
};
class BuiltinMutex {
Mutex M;
};
Mutex StatusMutex;
bool Status;
bool get_status() {
return (MutexLock(StatusMutex), Status);
// expected-warning@-1{{comma operator}}
// expected-note@-2{{cast expression to void}}
// CHECK: fix-it:{{.*}}:{[[@LINE-3]]:11-[[@LINE-3]]:11}:"static_cast<void>("
// CHECK: fix-it:{{.*}}:{[[@LINE-4]]:33-[[@LINE-4]]:33}:")"
return (MutexLock(), Status);
// expected-warning@-1{{comma operator}}
// expected-note@-2{{cast expression to void}}
// CHECK: fix-it:{{.*}}:{[[@LINE-3]]:11-[[@LINE-3]]:11}:"static_cast<void>("
// CHECK: fix-it:{{.*}}:{[[@LINE-4]]:22-[[@LINE-4]]:22}:")"
return (BuiltinMutex(), Status);
// expected-warning@-1{{comma operator}}
// expected-note@-2{{cast expression to void}}
// CHECK: fix-it:{{.*}}:{[[@LINE-3]]:11-[[@LINE-3]]:11}:"static_cast<void>("
// CHECK: fix-it:{{.*}}:{[[@LINE-4]]:25-[[@LINE-4]]:25}:")"
}
}
// Check for comma operator in conditions.
void test13(int x) {
x = (return_four(), x);
// expected-warning@-1{{comma operator}}
// expected-note@-2{{cast expression to void}}
// CHECK: fix-it:{{.*}}:{[[@LINE-3]]:8-[[@LINE-3]]:8}:"static_cast<void>("
// CHECK: fix-it:{{.*}}:{[[@LINE-4]]:21-[[@LINE-4]]:21}:")"
int y = (return_four(), x);
// expected-warning@-1{{comma operator}}
// expected-note@-2{{cast expression to void}}
// CHECK: fix-it:{{.*}}:{[[@LINE-3]]:12-[[@LINE-3]]:12}:"static_cast<void>("
// CHECK: fix-it:{{.*}}:{[[@LINE-4]]:25-[[@LINE-4]]:25}:")"
for (; return_four(), x;) {}
// expected-warning@-1{{comma operator}}
// expected-note@-2{{cast expression to void}}
// CHECK: fix-it:{{.*}}:{[[@LINE-3]]:10-[[@LINE-3]]:10}:"static_cast<void>("
// CHECK: fix-it:{{.*}}:{[[@LINE-4]]:23-[[@LINE-4]]:23}:")"
while (return_four(), x) {}
// expected-warning@-1{{comma operator}}
// expected-note@-2{{cast expression to void}}
// CHECK: fix-it:{{.*}}:{[[@LINE-3]]:10-[[@LINE-3]]:10}:"static_cast<void>("
// CHECK: fix-it:{{.*}}:{[[@LINE-4]]:23-[[@LINE-4]]:23}:")"
if (return_four(), x) {}
// expected-warning@-1{{comma operator}}
// expected-note@-2{{cast expression to void}}
// CHECK: fix-it:{{.*}}:{[[@LINE-3]]:7-[[@LINE-3]]:7}:"static_cast<void>("
// CHECK: fix-it:{{.*}}:{[[@LINE-4]]:20-[[@LINE-4]]:20}:")"
do { } while (return_four(), x);
// expected-warning@-1{{comma operator}}
// expected-note@-2{{cast expression to void}}
// CHECK: fix-it:{{.*}}:{[[@LINE-3]]:17-[[@LINE-3]]:17}:"static_cast<void>("
// CHECK: fix-it:{{.*}}:{[[@LINE-4]]:30-[[@LINE-4]]:30}:")"
}
// Nested comma operator with fix-its.
void test14() {
return_four(), return_four(), return_four(), return_four();
// expected-warning@-1 3{{comma operator}}
// expected-note@-2 3{{cast expression to void}}
// CHECK: fix-it:{{.*}}:{[[@LINE-3]]:3-[[@LINE-3]]:3}:"static_cast<void>("
// CHECK: fix-it:{{.*}}:{[[@LINE-4]]:16-[[@LINE-4]]:16}:")"
// CHECK: fix-it:{{.*}}:{[[@LINE-5]]:18-[[@LINE-5]]:18}:"static_cast<void>("
// CHECK: fix-it:{{.*}}:{[[@LINE-6]]:31-[[@LINE-6]]:31}:")"
// CHECK: fix-it:{{.*}}:{[[@LINE-7]]:33-[[@LINE-7]]:33}:"static_cast<void>("
// CHECK: fix-it:{{.*}}:{[[@LINE-8]]:46-[[@LINE-8]]:46}:")"
}
|
