1 /* PR c++/64767 */
2 /* { dg-do compile } */
3 /* { dg-options "-Wpointer-compare" } */
4 /* { dg-additional-options "-std=c++03" { target c++ } } */
5
6 int
f1(int * p,int ** q)7 f1 (int *p, int **q)
8 {
9 int r = 0;
10
11 r += p == '\0'; /* { dg-warning "10:comparison between pointer and zero character" } */
12 r += p == L'\0'; /* { dg-warning "10:comparison between pointer and zero character" } */
13 r += p != '\0'; /* { dg-warning "10:comparison between pointer and zero character" } */
14 r += p != L'\0'; /* { dg-warning "10:comparison between pointer and zero character" } */
15
16 r += '\0' == p; /* { dg-warning "13:comparison between pointer and zero character" } */
17 r += L'\0' == p; /* { dg-warning "14:comparison between pointer and zero character" } */
18 r += '\0' != p; /* { dg-warning "13:comparison between pointer and zero character" } */
19 r += L'\0' != p; /* { dg-warning "14:comparison between pointer and zero character" } */
20
21 r += q == '\0'; /* { dg-warning "10:comparison between pointer and zero character" } */
22 r += q == L'\0'; /* { dg-warning "10:comparison between pointer and zero character" } */
23 r += q != '\0'; /* { dg-warning "10:comparison between pointer and zero character" } */
24 r += q != L'\0'; /* { dg-warning "10:comparison between pointer and zero character" } */
25
26 r += '\0' == q; /* { dg-warning "13:comparison between pointer and zero character" } */
27 r += L'\0' == q; /* { dg-warning "14:comparison between pointer and zero character" } */
28 r += '\0' != q; /* { dg-warning "13:comparison between pointer and zero character" } */
29 r += L'\0' != q; /* { dg-warning "14:comparison between pointer and zero character" } */
30
31 return r;
32 }
33
34 int
f2(int * p)35 f2 (int *p)
36 {
37 int r = 0;
38
39 /* Keep quiet. */
40 r += p == (void *) 0;
41 r += p != (void *) 0;
42 r += (void *) 0 == p;
43 r += (void *) 0 != p;
44
45 r += p == 0;
46 r += p != 0;
47 r += 0 == p;
48 r += 0 != p;
49
50 return r;
51 }
52
53 int
f3(int * p)54 f3 (int *p)
55 {
56 int r = 0;
57
58 r += p == (char) 0; /* { dg-warning "10:comparison between pointer and zero character" } */
59 r += p != (char) 0; /* { dg-warning "10:comparison between pointer and zero character" } */
60
61 r += (char) 0 == p; /* { dg-warning "17:comparison between pointer and zero character" } */
62 r += (char) 0 != p; /* { dg-warning "17:comparison between pointer and zero character" } */
63
64 return r;
65 }
66