blob: 9f5cdef83994890162add3cc3c524c2fca5eb6f1 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
|
/* Test null pointer constants: typedefs for void should be OK but not
qualified void. */
/* Origin: Joseph Myers <joseph@codesourcery.com> */
/* { dg-do compile } */
/* { dg-options "-std=iso9899:1990 -pedantic-errors" } */
typedef void V;
int *p;
long *q;
int j;
void (*fp)(void);
void
f (void)
{
/* (V *)0 is a null pointer constant, so the assignment should be
diagnosed. */
q = (j ? p : (V *)0); /* { dg-error "5:assignment from incompatible pointer type" } */
q = (j ? p : (void *)0); /* { dg-error "5:assignment from incompatible pointer type" } */
/* And this conversion should be valid. */
(void (*)(void))(V *)0;
(void (*)(void))(void *)0;
/* Pointers to qualified void are not valid null pointer
constants. */
fp = (const void *)0; /* { dg-error "6:ISO C forbids assignment between function pointer and 'void \\*'" } */
fp = (void *)0;
fp = (V *)0;
fp = 0;
fp == 0;
0 == fp;
fp == (void *)0;
(void *)0 == fp;
fp == (V *)0;
(V *)0 == fp;
fp == (V *)1; /* { dg-error "6:ISO C forbids comparison of 'void \\*' with function pointer" } */
(V *)1 == fp; /* { dg-error "10:ISO C forbids comparison of 'void \\*' with function pointer" } */
fp == (const void *)0; /* { dg-error "6:ISO C forbids comparison of 'void \\*' with function pointer" } */
(const void *)0 == fp; /* { dg-error "19:ISO C forbids comparison of 'void \\*' with function pointer" } */
}
|
