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comparison gcc/testsuite/gcc.dg/anon-struct-1.c @ 111:04ced10e8804

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gcc 7
author kono
date Fri, 27 Oct 2017 22:46:09 +0900
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68:561a7518be6b 111:04ced10e8804
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