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111
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1 /* { dg-do compile } */
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2 /* { dg-options "" } */
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3
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4 /* Check compatibility of array declarations. */
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5
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6 /* Incomplete decl matches. */
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7 extern char arr0[];
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8 char arr0[1];
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9
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10 /* Two integral expressions must be the same. Note that 0 is
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11 a gcc extension, but it should work like any other constant. */
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12 extern char arr1[1];
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13 char arr1[1];
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14 extern char arr2[0];
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15 char arr2[0];
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16 extern char arr3[0]; /* { dg-message "note: previous declaration" } */
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17 char arr3[1]; /* { dg-error "conflicting types" } */
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18
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19 /* Variable size matches. */
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20 void func(int n, int m)
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21 {
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22 /* The next two are from the example in c99 6.7.5.2/9. */
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23 {
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24 /* Invalid: not compatible because 4 != 6. */
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25 int a[n][6][m];
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26 int (*p)[4][n+1];
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27 p = a; /* { dg-warning "incompatible" } */
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28 }
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29 {
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30 /* Compatible, but defined behavior only if n == 6 and m == n+1. */
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31 int c[n][n][6][m];
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32 int (*r)[n][n][n+1];
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33 r = c;
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34 }
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35 {
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36 /* Compatible, but undefined behavior; (2, 2) is not a constant
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37 expression, and thus A is a VLA. */
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38 int a[6][(2, 2)];
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39 int (*p)[3];
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40 p = a; /* { dg-bogus "incompatible" "bad vla handling" } */
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41 }
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42 }
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