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111
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1 /* Test typedef redeclaration in C11. */
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2 /* { dg-do compile } */
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3 /* { dg-options "-std=c11 -pedantic-errors" } */
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4
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5 /* C11 permits typedefs to be redeclared to the same type, but not to
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6 different-but-compatible types, and not when the type is variably
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7 modified. */
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8
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9 #include <limits.h>
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10
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11 typedef int TI;
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12 typedef int TI2;
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13 typedef TI2 TI;
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14 typedef TI TI2;
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15
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16 enum e { E1 = 0, E2 = INT_MAX, E3 = -1 };
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17 typedef enum e TE;
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18 typedef enum e TE; /* { dg-message "previous declaration" } */
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19 typedef int TE; /* { dg-error "with different type" } */
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20
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21 struct s;
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22 typedef struct s TS;
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23 struct s { int i; };
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24 typedef struct s TS;
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25
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26 typedef int IA[];
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27 typedef TI2 IA[]; /* { dg-message "previous declaration" } */
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28 typedef int A2[2];
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29 typedef TI A2[2]; /* { dg-message "previous declaration" } */
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30 typedef IA A2; /* { dg-error "with different type" } */
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31 typedef int A3[3];
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32 typedef A3 IA; /* { dg-error "with different type" } */
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33
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34 typedef void F(int);
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35 typedef void F(TI); /* { dg-message "previous declaration" } */
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36 typedef void F(enum e); /* { dg-error "with different type" } */
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37
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38 typedef int G(void);
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39 typedef TI G(void); /* { dg-message "previous declaration" } */
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40 typedef enum e G(void); /* { dg-error "with different type" } */
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41
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42 typedef int *P;
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43 typedef TI *P; /* { dg-message "previous declaration" } */
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44 typedef enum e *P; /* { dg-error "with different type" } */
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45
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46 typedef void F2();
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47 typedef void F2(); /* { dg-message "previous declaration" } */
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48 typedef void F2(int); /* { dg-error "with different type" } */
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49
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50 void
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51 f (void)
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52 {
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53 int a = 1;
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54 int b = 2;
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55 typedef void FN(int (*p)[a]);
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56 typedef void FN(int (*p)[b]);
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57 typedef void FN(int (*p)[*]); /* { dg-message "previous declaration" } */
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58 typedef void FN(int (*p)[1]); /* { dg-error "with different type" } */
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59 typedef void FN2(int (*p)[a]);
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60 typedef void FN2(int (*p)[b]);
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61 typedef void FN2(int (*p)[*]); /* { dg-message "previous declaration" } */
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62 typedef void FN2(int (*p)[]); /* { dg-error "with different type" } */
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63 typedef int AV[a]; /* { dg-message "previous declaration" } */
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64 typedef int AV[b-1]; /* { dg-error "redefinition" } */
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65 typedef int AAa[a]; /* { dg-message "previous declaration" } */
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66 typedef int AAb[b-1];
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67 typedef AAa *VF(void); /* { dg-message "previous declaration" } */
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68 typedef AAb *VF(void); /* { dg-error "redefinition" } */
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69 typedef AAa AAa; /* { dg-error "redefinition" } */
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70 }
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