1/* Test null pointer constants: typedefs for void should be OK but not
2   qualified void.  */
3/* Origin: Joseph Myers <joseph@codesourcery.com> */
4/* { dg-do compile } */
5/* { dg-options "-std=iso9899:1990 -pedantic-errors" } */
6
7typedef void V;
8int *p;
9long *q;
10int j;
11void (*fp)(void);
12
13void
14f (void)
15{
16  /* (V *)0 is a null pointer constant, so the assignment should be
17     diagnosed.  */
18  q = (j ? p : (V *)0); /* { dg-error "5:assignment from incompatible pointer type" } */
19  q = (j ? p : (void *)0); /* { dg-error "5:assignment from incompatible pointer type" } */
20  /* And this conversion should be valid.  */
21  (void (*)(void))(V *)0;
22  (void (*)(void))(void *)0;
23  /* Pointers to qualified void are not valid null pointer
24     constants.  */
25  fp = (const void *)0; /* { dg-error "6:ISO C forbids assignment between function pointer and 'void \\*'" } */
26  fp = (void *)0;
27  fp = (V *)0;
28  fp = 0;
29  fp == 0;
30  0 == fp;
31  fp == (void *)0;
32  (void *)0 == fp;
33  fp == (V *)0;
34  (V *)0 == fp;
35  fp == (V *)1; /* { dg-error "6:ISO C forbids comparison of 'void \\*' with function pointer" } */
36  (V *)1 == fp; /* { dg-error "10:ISO C forbids comparison of 'void \\*' with function pointer" } */
37  fp == (const void *)0; /* { dg-error "6:ISO C forbids comparison of 'void \\*' with function pointer" } */
38  (const void *)0 == fp; /* { dg-error "19:ISO C forbids comparison of 'void \\*' with function pointer" } */
39}
40