1 // RUN: %clang_cc1 %s -fsyntax-only -verify
2 
3 enum Foo { FooA, FooB, FooC };
4 enum Bar { BarD, BarE, BarF };
5 enum { AnonAA = 42, AnonAB = 43 };
6 enum { AnonBA = 44, AnonBB = 45 };
7 enum { Anon1, Anon2, Anon3 };
8 typedef enum { TD1, TD2 } TD;
9 
10 namespace name1 {
11   enum Foo {F1, F2, F3};
12   enum Baz {B1, B2, B3};
13 }
14 
15 namespace name2 {
16   enum Baz {B1, B2, B3};
17 }
18 
19 using name1::Baz;
20 using name1::B1;
21 using name2::B2;
22 typedef name1::Foo oneFoo;
23 typedef name1::Foo twoFoo;
24 Foo getFoo();
25 Bar getBar();
26 
27 void test () {
28   Foo x = FooA;
29   Bar y = BarD;
30   Baz z = name1::B3;
31   name1::Foo a;
32   oneFoo b;
33   twoFoo c;
34   TD td;
35 
36   while (x == FooA);
37   while (y == BarD);
38   while (a == name1::F1);
39   while (z == name1::B2);
40   while (a == b);
41   while (a == c);
42   while (b == c);
43   while (B1 == name1::B2);
44   while (B2 == name2::B1);
45   while (x == AnonAA); // expected-warning {{comparison of constant 'AnonAA' (42) with expression of type 'Foo' is always false}}
46   while (AnonBB == y); // expected-warning {{comparison of constant 'AnonBB' (45) with expression of type 'Bar' is always false}}
47   while (AnonAA == AnonAB);
48   while (AnonAB == AnonBA);
49   while (AnonBB == AnonAA);
50 
51   while ((x) == FooA);
52   while ((y) == BarD);
53   while ((a) == name1::F1);
54   while (z == (name1::B2));
55   while (a == (b));
56   while (a == (c));
57   while ((b) == (c));
58   while ((B1) == (name1::B2));
59   while ((B2) == (name2::B1));
60 
61   while (((x)) == FooA);
62   while ((y) == (BarD));
63   while ((a) == (name1::F1));
64   while (z == (name1::B2));
65   while ((a) == ((((b)))));
66   while (((a)) == (c));
67   while ((b) == (((c))));
68   while ((((((B1))))) == (((name1::B2))));
69   while (B2 == ((((((name2::B1)))))));
70 
71   while (td == Anon1);
72   while (td == AnonAA);  // expected-warning {{comparison of constant 'AnonAA' (42) with expression of type 'TD' is always false}}
73 
74   while (B1 == B2); // expected-warning  {{comparison of two values with different enumeration types ('name1::Baz' and 'name2::Baz')}}
75   while (name1::B2 == name2::B3); // expected-warning  {{comparison of two values with different enumeration types ('name1::Baz' and 'name2::Baz')}}
76   while (z == name2::B2); // expected-warning  {{comparison of two values with different enumeration types ('name1::Baz' and 'name2::Baz')}}
77 
78   while (((((B1)))) == B2); // expected-warning  {{comparison of two values with different enumeration types ('name1::Baz' and 'name2::Baz')}}
79   while (name1::B2 == (name2::B3)); // expected-warning  {{comparison of two values with different enumeration types ('name1::Baz' and 'name2::Baz')}}
80   while (z == ((((name2::B2))))); // expected-warning  {{comparison of two values with different enumeration types ('name1::Baz' and 'name2::Baz')}}
81 
82   while ((((B1))) == (((B2)))); // expected-warning  {{comparison of two values with different enumeration types ('name1::Baz' and 'name2::Baz')}}
83   while ((name1::B2) == (((name2::B3)))); // expected-warning  {{comparison of two values with different enumeration types ('name1::Baz' and 'name2::Baz')}}
84   while ((((z))) == (name2::B2)); // expected-warning  {{comparison of two values with different enumeration types ('name1::Baz' and 'name2::Baz')}}
85 
86   while (x == a); // expected-warning  {{comparison of two values with different enumeration types ('Foo' and 'name1::Foo')}}
87   while (x == b); // expected-warning  {{comparison of two values with different enumeration types ('Foo' and 'oneFoo' (aka 'name1::Foo'))}}
88   while (x == c); // expected-warning  {{comparison of two values with different enumeration types ('Foo' and 'twoFoo' (aka 'name1::Foo'))}}
89 
90   while (x == y); // expected-warning  {{comparison of two values with different enumeration types ('Foo' and 'Bar')}}
91   while (x != y); // expected-warning  {{comparison of two values with different enumeration types ('Foo' and 'Bar')}}
92   while (x >= y); // expected-warning  {{comparison of two values with different enumeration types ('Foo' and 'Bar')}}
93   while (x <= y); // expected-warning  {{comparison of two values with different enumeration types ('Foo' and 'Bar')}}
94   while (x > y); // expected-warning  {{comparison of two values with different enumeration types ('Foo' and 'Bar')}}
95   while (x < y); // expected-warning  {{comparison of two values with different enumeration types ('Foo' and 'Bar')}}
96 
97   while (FooB == y); // expected-warning  {{comparison of two values with different enumeration types ('Foo' and 'Bar')}}
98   while (FooB != y); // expected-warning  {{comparison of two values with different enumeration types ('Foo' and 'Bar')}}
99   while (FooB >= y); // expected-warning  {{comparison of two values with different enumeration types ('Foo' and 'Bar')}}
100   while (FooB <= y); // expected-warning  {{comparison of two values with different enumeration types ('Foo' and 'Bar')}}
101   while (FooB > y); // expected-warning  {{comparison of two values with different enumeration types ('Foo' and 'Bar')}}
102   while (FooB < y); // expected-warning  {{comparison of two values with different enumeration types ('Foo' and 'Bar')}}
103 
104   while (FooB == BarD); // expected-warning  {{comparison of two values with different enumeration types ('Foo' and 'Bar')}}
105   while (FooB != BarD); // expected-warning  {{comparison of two values with different enumeration types ('Foo' and 'Bar')}}
106   while (FooB >= BarD); // expected-warning  {{comparison of two values with different enumeration types ('Foo' and 'Bar')}}
107   while (FooB <= BarD); // expected-warning  {{comparison of two values with different enumeration types ('Foo' and 'Bar')}}
108   while (FooB > BarD); // expected-warning  {{comparison of two values with different enumeration types ('Foo' and 'Bar')}}
109   while (FooB < BarD); // expected-warning  {{comparison of two values with different enumeration types ('Foo' and 'Bar')}}
110 
111   while (x == BarD); // expected-warning  {{comparison of two values with different enumeration types ('Foo' and 'Bar')}}
112   while (x != BarD); // expected-warning  {{comparison of two values with different enumeration types ('Foo' and 'Bar')}}
113   while (x >= BarD); // expected-warning  {{comparison of two values with different enumeration types ('Foo' and 'Bar')}}
114   while (x <= BarD); // expected-warning  {{comparison of two values with different enumeration types ('Foo' and 'Bar')}}
115   while (x > BarD); // expected-warning  {{comparison of two values with different enumeration types ('Foo' and 'Bar')}}
116   while (x < BarD); // expected-warning  {{comparison of two values with different enumeration types ('Foo' and 'Bar')}}
117 
118   while (getFoo() == y); // expected-warning  {{comparison of two values with different enumeration types ('Foo' and 'Bar')}}
119   while (getFoo() != y); // expected-warning  {{comparison of two values with different enumeration types ('Foo' and 'Bar')}}
120   while (getFoo() >= y); // expected-warning  {{comparison of two values with different enumeration types ('Foo' and 'Bar')}}
121   while (getFoo() <= y); // expected-warning  {{comparison of two values with different enumeration types ('Foo' and 'Bar')}}
122   while (getFoo() > y); // expected-warning  {{comparison of two values with different enumeration types ('Foo' and 'Bar')}}
123   while (getFoo() < y); // expected-warning  {{comparison of two values with different enumeration types ('Foo' and 'Bar')}}
124 
125   while (getFoo() == BarD); // expected-warning  {{comparison of two values with different enumeration types ('Foo' and 'Bar')}}
126   while (getFoo() != BarD); // expected-warning  {{comparison of two values with different enumeration types ('Foo' and 'Bar')}}
127   while (getFoo() >= BarD); // expected-warning  {{comparison of two values with different enumeration types ('Foo' and 'Bar')}}
128   while (getFoo() <= BarD); // expected-warning  {{comparison of two values with different enumeration types ('Foo' and 'Bar')}}
129   while (getFoo() > BarD); // expected-warning  {{comparison of two values with different enumeration types ('Foo' and 'Bar')}}
130   while (getFoo() < BarD); // expected-warning  {{comparison of two values with different enumeration types ('Foo' and 'Bar')}}
131 
132   while (getFoo() == getBar()); // expected-warning  {{comparison of two values with different enumeration types ('Foo' and 'Bar')}}
133   while (getFoo() != getBar()); // expected-warning  {{comparison of two values with different enumeration types ('Foo' and 'Bar')}}
134   while (getFoo() >= getBar()); // expected-warning  {{comparison of two values with different enumeration types ('Foo' and 'Bar')}}
135   while (getFoo() <= getBar()); // expected-warning  {{comparison of two values with different enumeration types ('Foo' and 'Bar')}}
136   while (getFoo() > getBar()); // expected-warning  {{comparison of two values with different enumeration types ('Foo' and 'Bar')}}
137   while (getFoo() < getBar()); // expected-warning  {{comparison of two values with different enumeration types ('Foo' and 'Bar')}}
138 
139   while (FooB == getBar()); // expected-warning  {{comparison of two values with different enumeration types ('Foo' and 'Bar')}}
140   while (FooB != getBar()); // expected-warning  {{comparison of two values with different enumeration types ('Foo' and 'Bar')}}
141   while (FooB >= getBar()); // expected-warning  {{comparison of two values with different enumeration types ('Foo' and 'Bar')}}
142   while (FooB <= getBar()); // expected-warning  {{comparison of two values with different enumeration types ('Foo' and 'Bar')}}
143   while (FooB > getBar()); // expected-warning  {{comparison of two values with different enumeration types ('Foo' and 'Bar')}}
144   while (FooB < getBar()); // expected-warning  {{comparison of two values with different enumeration types ('Foo' and 'Bar')}}
145 
146   while (x == getBar()); // expected-warning  {{comparison of two values with different enumeration types ('Foo' and 'Bar')}}
147   while (x != getBar()); // expected-warning  {{comparison of two values with different enumeration types ('Foo' and 'Bar')}}
148   while (x >= getBar()); // expected-warning  {{comparison of two values with different enumeration types ('Foo' and 'Bar')}}
149   while (x <= getBar()); // expected-warning  {{comparison of two values with different enumeration types ('Foo' and 'Bar')}}
150   while (x > getBar()); // expected-warning  {{comparison of two values with different enumeration types ('Foo' and 'Bar')}}
151   while (x < getBar()); // expected-warning  {{comparison of two values with different enumeration types ('Foo' and 'Bar')}}
152 
153 
154 
155   while (y == x); // expected-warning  {{comparison of two values with different enumeration types ('Bar' and 'Foo')}}
156   while (y != x); // expected-warning  {{comparison of two values with different enumeration types ('Bar' and 'Foo')}}
157   while (y >= x); // expected-warning  {{comparison of two values with different enumeration types ('Bar' and 'Foo')}}
158   while (y <= x); // expected-warning  {{comparison of two values with different enumeration types ('Bar' and 'Foo')}}
159   while (y > x); // expected-warning  {{comparison of two values with different enumeration types ('Bar' and 'Foo')}}
160   while (y < x); // expected-warning  {{comparison of two values with different enumeration types ('Bar' and 'Foo')}}
161 
162   while (y == FooB); // expected-warning  {{comparison of two values with different enumeration types ('Bar' and 'Foo')}}
163   while (y != FooB); // expected-warning  {{comparison of two values with different enumeration types ('Bar' and 'Foo')}}
164   while (y >= FooB); // expected-warning  {{comparison of two values with different enumeration types ('Bar' and 'Foo')}}
165   while (y <= FooB); // expected-warning  {{comparison of two values with different enumeration types ('Bar' and 'Foo')}}
166   while (y > FooB); // expected-warning  {{comparison of two values with different enumeration types ('Bar' and 'Foo')}}
167   while (y < FooB); // expected-warning  {{comparison of two values with different enumeration types ('Bar' and 'Foo')}}
168 
169   while (BarD == FooB); // expected-warning  {{comparison of two values with different enumeration types ('Bar' and 'Foo')}}
170   while (BarD != FooB); // expected-warning  {{comparison of two values with different enumeration types ('Bar' and 'Foo')}}
171   while (BarD >= FooB); // expected-warning  {{comparison of two values with different enumeration types ('Bar' and 'Foo')}}
172   while (BarD <= FooB); // expected-warning  {{comparison of two values with different enumeration types ('Bar' and 'Foo')}}
173   while (BarD > FooB); // expected-warning  {{comparison of two values with different enumeration types ('Bar' and 'Foo')}}
174   while (BarD <FooB); // expected-warning  {{comparison of two values with different enumeration types ('Bar' and 'Foo')}}
175 
176   while (BarD == x); // expected-warning  {{comparison of two values with different enumeration types ('Bar' and 'Foo')}}
177   while (BarD != x); // expected-warning  {{comparison of two values with different enumeration types ('Bar' and 'Foo')}}
178   while (BarD >= x); // expected-warning  {{comparison of two values with different enumeration types ('Bar' and 'Foo')}}
179   while (BarD <= x); // expected-warning  {{comparison of two values with different enumeration types ('Bar' and 'Foo')}}
180   while (BarD < x); // expected-warning  {{comparison of two values with different enumeration types ('Bar' and 'Foo')}}
181   while (BarD > x); // expected-warning  {{comparison of two values with different enumeration types ('Bar' and 'Foo')}}
182 
183   while (y == getFoo()); // expected-warning  {{comparison of two values with different enumeration types ('Bar' and 'Foo')}}
184   while (y != getFoo()); // expected-warning  {{comparison of two values with different enumeration types ('Bar' and 'Foo')}}
185   while (y >= getFoo()); // expected-warning  {{comparison of two values with different enumeration types ('Bar' and 'Foo')}}
186   while (y <= getFoo()); // expected-warning  {{comparison of two values with different enumeration types ('Bar' and 'Foo')}}
187   while (y > getFoo()); // expected-warning  {{comparison of two values with different enumeration types ('Bar' and 'Foo')}}
188   while (y < getFoo()); // expected-warning  {{comparison of two values with different enumeration types ('Bar' and 'Foo')}}
189 
190   while (BarD == getFoo()); // expected-warning  {{comparison of two values with different enumeration types ('Bar' and 'Foo')}}
191   while (BarD != getFoo()); // expected-warning  {{comparison of two values with different enumeration types ('Bar' and 'Foo')}}
192   while (BarD >= getFoo()); // expected-warning  {{comparison of two values with different enumeration types ('Bar' and 'Foo')}}
193   while (BarD <= getFoo()); // expected-warning  {{comparison of two values with different enumeration types ('Bar' and 'Foo')}}
194   while (BarD > getFoo()); // expected-warning  {{comparison of two values with different enumeration types ('Bar' and 'Foo')}}
195   while (BarD < getFoo()); // expected-warning  {{comparison of two values with different enumeration types ('Bar' and 'Foo')}}
196 
197   while (getBar() == getFoo()); // expected-warning  {{comparison of two values with different enumeration types ('Bar' and 'Foo')}}
198   while (getBar() != getFoo()); // expected-warning  {{comparison of two values with different enumeration types ('Bar' and 'Foo')}}
199   while (getBar() >= getFoo()); // expected-warning  {{comparison of two values with different enumeration types ('Bar' and 'Foo')}}
200   while (getBar() <= getFoo()); // expected-warning  {{comparison of two values with different enumeration types ('Bar' and 'Foo')}}
201   while (getBar() > getFoo()); // expected-warning  {{comparison of two values with different enumeration types ('Bar' and 'Foo')}}
202   while (getBar() < getFoo()); // expected-warning  {{comparison of two values with different enumeration types ('Bar' and 'Foo')}}
203 
204   while (getBar() == FooB); // expected-warning  {{comparison of two values with different enumeration types ('Bar' and 'Foo')}}
205   while (getBar() != FooB); // expected-warning  {{comparison of two values with different enumeration types ('Bar' and 'Foo')}}
206   while (getBar() >= FooB); // expected-warning  {{comparison of two values with different enumeration types ('Bar' and 'Foo')}}
207   while (getBar() <= FooB); // expected-warning  {{comparison of two values with different enumeration types ('Bar' and 'Foo')}}
208   while (getBar() > FooB); // expected-warning  {{comparison of two values with different enumeration types ('Bar' and 'Foo')}}
209   while (getBar() < FooB); // expected-warning  {{comparison of two values with different enumeration types ('Bar' and 'Foo')}}
210 
211   while (getBar() == x); // expected-warning  {{comparison of two values with different enumeration types ('Bar' and 'Foo')}}
212   while (getBar() != x); // expected-warning  {{comparison of two values with different enumeration types ('Bar' and 'Foo')}}
213   while (getBar() >= x); // expected-warning  {{comparison of two values with different enumeration types ('Bar' and 'Foo')}}
214   while (getBar() <= x); // expected-warning  {{comparison of two values with different enumeration types ('Bar' and 'Foo')}}
215   while (getBar() > x); // expected-warning  {{comparison of two values with different enumeration types ('Bar' and 'Foo')}}
216   while (getBar() < x); // expected-warning  {{comparison of two values with different enumeration types ('Bar' and 'Foo')}}
217 
218   while (td == FooA); // expected-warning  {{comparison of two values with different enumeration types ('TD' and 'Foo')}}
219   while (td == BarD); // expected-warning  {{comparison of two values with different enumeration types ('TD' and 'Bar')}}
220   while (name1::F1 == td); // expected-warning  {{comparison of two values with different enumeration types ('name1::Foo' and 'TD')}}
221   while (name2::B1 == td); // expected-warning  {{comparison of two values with different enumeration types ('name2::Baz' and 'TD')}}
222   while (td == a); // expected-warning  {{comparison of two values with different enumeration types ('TD' and 'name1::Foo')}}
223   while (td == b); // expected-warning  {{comparison of two values with different enumeration types ('TD' and 'oneFoo' (aka 'name1::Foo'))}}
224   while (td == c); // expected-warning  {{comparison of two values with different enumeration types ('TD' and 'twoFoo' (aka 'name1::Foo'))}}
225   while (td == x); // expected-warning  {{comparison of two values with different enumeration types ('TD' and 'Foo')}}
226   while (td == y); // expected-warning  {{comparison of two values with different enumeration types ('TD' and 'Bar')}}
227   while (td == z); // expected-warning  {{comparison of two values with different enumeration types ('TD' and 'name1::Baz')}}
228 
229   while (a == TD1); // expected-warning  {{comparison of two values with different enumeration types ('name1::Foo' and 'TD')}}
230   while (b == TD2); // expected-warning  {{comparison of two values with different enumeration types ('oneFoo' (aka 'name1::Foo') and 'TD')}}
231   while (c == TD1); // expected-warning  {{comparison of two values with different enumeration types ('twoFoo' (aka 'name1::Foo') and 'TD')}}
232   while (x == TD2); // expected-warning  {{comparison of two values with different enumeration types ('Foo' and 'TD')}}
233   while (y == TD1); // expected-warning  {{comparison of two values with different enumeration types ('Bar' and 'TD')}}
234   while (z == TD2); // expected-warning  {{comparison of two values with different enumeration types ('name1::Baz' and 'TD')}}
235 
236   switch (a) {
237     case name1::F1: break;
238     case name1::F3: break;
239     case name2::B2: break; // expected-warning {{comparison of two values with different enumeration types in switch statement ('name1::Foo' and 'name2::Baz')}}
240   }
241 
242   switch (x) {
243     case FooB: break;
244     case FooC: break;
245     case BarD: break; // expected-warning {{comparison of two values with different enumeration types in switch statement ('Foo' and 'Bar')}}
246   }
247 
248   switch(getBar()) {
249     case BarE: break;
250     case BarF: break;
251     case FooA: break; // expected-warning {{comparison of two values with different enumeration types in switch statement ('Bar' and 'Foo')}}
252   }
253 
254   switch(x) {
255     case AnonAA: break; // expected-warning {{case value not in enumerated type 'Foo'}}
256     case FooA: break;
257     case FooB: break;
258     case FooC: break;
259   }
260 
261   switch (td) {
262     case TD1: break;
263     case FooB: break; // expected-warning {{comparison of two values with different enumeration types in switch statement ('TD' and 'Foo')}}
264     case BarF: break; // expected-warning {{comparison of two values with different enumeration types in switch statement ('TD' and 'Bar')}}
265     // expected-warning@-1 {{case value not in enumerated type 'TD'}}
266     case AnonAA: break; // expected-warning {{case value not in enumerated type 'TD'}}
267   }
268 
269   switch (td) {
270     case Anon1: break;
271     case TD2: break;
272   }
273 
274   switch (a) {
275     case TD1: break; // expected-warning {{comparison of two values with different enumeration types in switch statement ('name1::Foo' and 'TD')}}
276     case TD2: break; // expected-warning {{comparison of two values with different enumeration types in switch statement ('name1::Foo' and 'TD')}}
277     case name1::F3: break;
278   }
279 }
280