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111
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1 /* { dg-options "-std=iso9899:1990 -pedantic" } */
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2 /* In strict ISO C mode, we don't recognize the anonymous struct/union
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3 extension or any Microsoft extensions. */
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4
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5 struct A { char a; };
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6
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7 /* MS extension. */
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8 struct B {
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9 struct A; /* { dg-warning "does not declare anything" } */
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10 char b;
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11 };
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12 char testB[sizeof(struct B) == sizeof(struct A) ? 1 : -1];
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13
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14 /* MS extension. */
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15 struct C {
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16 struct D { char d; }; /* { dg-warning "does not declare anything" } */
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17 char c;
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18 };
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19 char testC[sizeof(struct C) == sizeof(struct A) ? 1 : -1];
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20 char testD[sizeof(struct D) == sizeof(struct A) ? 1 : -1];
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21
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22 /* GNU extension. */
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23 struct E {
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24 struct { char z; }; /* { dg-warning "unnamed structs" } */
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25 char e;
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26 };
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27
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28
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29 /* MS extension. */
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30 typedef struct A typedef_A;
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31 struct F {
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32 typedef_A; /* { dg-warning "does not declare anything" } */
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33 char f;
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34 };
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35 char testF[sizeof(struct F) == sizeof(struct A) ? 1 : -1];
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36
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37 /* __extension__ enables GNU C mode for the duration of the declaration. */
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38 __extension__ struct G {
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39 struct { char z; };
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40 char g;
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41 };
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42 char testG[sizeof(struct G) == 2 * sizeof(struct A) ? 1 : -1];
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43
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44 struct H {
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45 __extension__ struct { char z; };
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46 char h;
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47 };
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48 char testH[sizeof(struct H) == 2 * sizeof(struct A) ? 1 : -1];
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49
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50 /* Make sure __extension__ gets turned back off. */
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51 struct I {
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52 struct { char z; }; /* { dg-warning "unnamed structs" } */
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53 char i;
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54 };
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55 char testI[sizeof(struct I) == sizeof(struct E) ? 1 : -1];
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56
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