1 // RUN: %clang_cc1 %s -fsyntax-only -verify -pedantic
2
3 typedef struct S S; // expected-note 3 {{forward declaration of 'struct S'}}
a(S * b,void * c)4 void a(S* b, void* c) {
5 void (*fp)(int) = 0;
6 b++; // expected-error {{arithmetic on a pointer to an incomplete type}}
7 b += 1; // expected-error {{arithmetic on a pointer to an incomplete type}}
8 c++; // expected-warning {{arithmetic on a pointer to void is a GNU extension}}
9 c += 1; // expected-warning {{arithmetic on a pointer to void is a GNU extension}}
10 c--; // expected-warning {{arithmetic on a pointer to void is a GNU extension}}
11 c -= 1; // expected-warning {{arithmetic on a pointer to void is a GNU extension}}
12 (void) c[1]; // expected-warning {{subscript of a pointer to void is a GNU extension}}
13 b = 1+b; // expected-error {{arithmetic on a pointer to an incomplete type}}
14 /* The next couple tests are only pedantic warnings in gcc */
15 void (*d)(S*,void*) = a;
16 d += 1; // expected-warning {{arithmetic on a pointer to the function type 'void (S *, void *)' is a GNU extension}}
17 d++; // expected-warning {{arithmetic on a pointer to the function type 'void (S *, void *)' is a GNU extension}}
18 d--; // expected-warning {{arithmetic on a pointer to the function type 'void (S *, void *)' is a GNU extension}}
19 d -= 1; // expected-warning {{arithmetic on a pointer to the function type 'void (S *, void *)' is a GNU extension}}
20 (void)(1 + d); // expected-warning {{arithmetic on a pointer to the function type 'void (S *, void *)' is a GNU extension}}
21 }
22