1 /* Test diagnostics for arithmetic on void and function pointers.
2 Test with -pedantic. */
3 /* Origin: Joseph Myers <joseph@codesourcery.com> */
4 /* { dg-do compile } */
5 /* { dg-options "-pedantic" } */
6
7 void *p;
8 void (*f)(void);
9
10 void
g(void)11 g (void)
12 {
13 p + 0; /* { dg-warning "pointer of type 'void \\*' used in arithmetic" } */
14 p + 1; /* { dg-warning "pointer of type 'void \\*' used in arithmetic" } */
15 0 + p; /* { dg-warning "pointer of type 'void \\*' used in arithmetic" } */
16 1 + p; /* { dg-warning "pointer of type 'void \\*' used in arithmetic" } */
17 p - 0; /* { dg-warning "pointer of type 'void \\*' used in arithmetic" } */
18 p - 1; /* { dg-warning "pointer of type 'void \\*' used in arithmetic" } */
19 p += 0; /* { dg-warning "pointer of type 'void \\*' used in arithmetic" } */
20 p += 1; /* { dg-warning "pointer of type 'void \\*' used in arithmetic" } */
21 p -= 0; /* { dg-warning "pointer of type 'void \\*' used in arithmetic" } */
22 p -= 1; /* { dg-warning "pointer of type 'void \\*' used in arithmetic" } */
23 f + 0; /* { dg-warning "pointer to a function used in arithmetic" } */
24 f + 1; /* { dg-warning "pointer to a function used in arithmetic" } */
25 0 + f; /* { dg-warning "pointer to a function used in arithmetic" } */
26 1 + f; /* { dg-warning "pointer to a function used in arithmetic" } */
27 f - 0; /* { dg-warning "pointer to a function used in arithmetic" } */
28 f - 1; /* { dg-warning "pointer to a function used in arithmetic" } */
29 f += 0; /* { dg-warning "pointer to a function used in arithmetic" } */
30 f += 1; /* { dg-warning "pointer to a function used in arithmetic" } */
31 f -= 0; /* { dg-warning "pointer to a function used in arithmetic" } */
32 f -= 1; /* { dg-warning "pointer to a function used in arithmetic" } */
33 p[0]; /* { dg-warning "dereferencing 'void \\*' pointer" } */
34 /* { dg-warning "pointer of type 'void \\*' used in arithmetic" "array 1" { target *-*-* } .-1 } */
35 0[p]; /* { dg-warning "dereferencing 'void \\*' pointer" } */
36 /* { dg-warning "pointer of type 'void \\*' used in arithmetic" "array 1" { target *-*-* } .-1 } */
37 f[0]; /* { dg-error "subscripted value is pointer to function" } */
38 0[f]; /* { dg-error "subscripted value is pointer to function" } */
39 p - p; /* { dg-warning "pointer of type 'void \\*' used in subtraction" } */
40 f - f; /* { dg-warning "pointer to a function used in subtraction" } */
41 }
42