1 /* { dg-options "-std=iso9899:1990 -pedantic" } */
2 /* In strict ISO C mode, we don't recognize the anonymous struct/union
3    extension or any Microsoft extensions.  */
4 
5 struct A { char a; };
6 
7 /* MS extension.  */
8 struct B {
9   struct A;			/* { dg-warning "does not declare anything" } */
10   char b;
11 };
12 char testB[sizeof(struct B) == sizeof(struct A) ? 1 : -1];
13 
14 /* MS extension.  */
15 struct C {
16   struct D { char d; };		/* { dg-warning "does not declare anything" } */
17   char c;
18 };
19 char testC[sizeof(struct C) == sizeof(struct A) ? 1 : -1];
20 char testD[sizeof(struct D) == sizeof(struct A) ? 1 : -1];
21 
22 /* GNU extension.  */
23 struct E {
24   struct { char z; };		/* { dg-warning "unnamed structs" } */
25   char e;
26 };
27 
28 
29 /* MS extension.  */
30 typedef struct A typedef_A;
31 struct F {
32   typedef_A;			/* { dg-warning "does not declare anything" } */
33   char f;
34 };
35 char testF[sizeof(struct F) == sizeof(struct A) ? 1 : -1];
36 
37 /* __extension__ enables GNU C mode for the duration of the declaration.  */
38 __extension__ struct G {
39   struct { char z; };
40   char g;
41 };
42 char testG[sizeof(struct G) == 2 * sizeof(struct A) ? 1 : -1];
43 
44 struct H {
45   __extension__ struct { char z; };
46   char h;
47 };
48 char testH[sizeof(struct H) == 2 * sizeof(struct A) ? 1 : -1];
49 
50 /* Make sure __extension__ gets turned back off.  */
51 struct I {
52   struct { char z; };		/* { dg-warning "unnamed structs" } */
53   char i;
54 };
55 char testI[sizeof(struct I) == sizeof(struct E) ? 1 : -1];
56 
57