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comparison gcc/testsuite/gcc.dg/func-ptr-conv-1.c @ 111:04ced10e8804

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gcc 7
author kono
date Fri, 27 Oct 2017 22:46:09 +0900
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68:561a7518be6b 111:04ced10e8804
1 /* Conversions between function and object pointers are not permitted
2 in any version of ISO C, even with casts, except for the special
3 case of converting a null pointer constant to function pointer
4 type. Likewise, comparisons between function and object pointers
5 are not permitted. PR c/11234. */
6 /* Origin: Joseph Myers <jsm@polyomino.org.uk> */
7 /* { dg-do compile } */
8 /* { dg-options "-pedantic" } */
9
10 void f(void);
11
12 void *v1 = f; /* { dg-warning "12:pointer" "bad conversion" } */
13 void *v2 = &f; /* { dg-warning "12:pointer" "bad conversion" } */
14 void *v3 = (void *)f; /* { dg-warning "12:pointer" "bad conversion" } */
15 void *v4 = (void *)&f; /* { dg-warning "12:pointer" "bad conversion" } */
16 void *v5;
17 char *c1 = f; /* { dg-warning "12:pointer" "bad conversion" } */
18 char *c2 = &f; /* { dg-warning "12:pointer" "bad conversion" } */
19 char *c3 = (char *)f; /* { dg-warning "12:pointer" "bad conversion" } */
20 char *c4 = (char *)&f; /* { dg-warning "12:pointer" "bad conversion" } */
21 char *c5;
22 void (*fp)(void);
23 int a;
24
25 void
26 g(void)
27 {
28 v5 = f; /* { dg-warning "6:pointer" "bad conversion" } */
29 v5 = &f; /* { dg-warning "6:pointer" "bad conversion" } */
30 v5 = (void *)f; /* { dg-warning "8:pointer" "bad conversion" } */
31 v5 = (void *)&f; /* { dg-warning "8:pointer" "bad conversion" } */
32 c5 = f; /* { dg-warning "6:pointer" "bad conversion" } */
33 c5 = &f; /* { dg-warning "6:pointer" "bad conversion" } */
34 c5 = (char *)f; /* { dg-warning "8:pointer" "bad conversion" } */
35 c5 = (char *)&f; /* { dg-warning "8:pointer" "bad conversion" } */
36 fp = v5; /* { dg-warning "6:pointer" "bad conversion" } */
37 fp = c5; /* { dg-warning "6:pointer" "bad conversion" } */
38 fp = (void (*)(void))v5; /* { dg-warning "8:pointer" "bad conversion" } */
39 fp = (void (*)(void))c5; /* { dg-warning "8:pointer" "bad conversion" } */
40 (a ? f : v3); /* { dg-warning "10:pointer" "bad conversion" } */
41 (a ? v2 : fp); /* { dg-warning "11:pointer" "bad conversion" } */
42 /* The following are OK. */
43 fp = 0;
44 fp = (void *)0;
45 fp = 0L;
46 fp = (void (*)(void))0;
47 fp = (void (*)(void))(void *)0;
48 (a ? f : 0);
49 (a ? f : (void *)0);
50 (a ? (void *)0 : fp);
51 (a ? 0 : fp);
52 }
53
54 /* The following are OK. */
55 void (*fp2)(void) = 0;
56 void (*fp3)(void) = (void *)0;