1 // RUN: %clang_cc1 %s -fsyntax-only -verify -pedantic -std=c11
2
3 typedef struct S S; // expected-note 4 {{forward declaration of 'struct S'}}
4 extern _Atomic(S*) e;
a(S * b,void * c)5 void a(S* b, void* c) {
6 void (*fp)(int) = 0;
7 b++; // expected-error {{arithmetic on a pointer to an incomplete type}}
8 b += 1; // expected-error {{arithmetic on a pointer to an incomplete type}}
9 c++; // expected-warning {{arithmetic on a pointer to void is a GNU extension}}
10 c += 1; // expected-warning {{arithmetic on a pointer to void is a GNU extension}}
11 c--; // expected-warning {{arithmetic on a pointer to void is a GNU extension}}
12 c -= 1; // expected-warning {{arithmetic on a pointer to void is a GNU extension}}
13 (void) c[1]; // expected-warning {{subscript of a pointer to void is a GNU extension}}
14 b = 1+b; // expected-error {{arithmetic on a pointer to an incomplete type}}
15 /* The next couple tests are only pedantic warnings in gcc */
16 void (*d)(S*,void*) = a;
17 d += 1; // expected-warning {{arithmetic on a pointer to the function type 'void (S *, void *)' (aka 'void (struct S *, void *)') is a GNU extension}}
18 d++; // expected-warning {{arithmetic on a pointer to the function type 'void (S *, void *)' (aka 'void (struct S *, void *)') is a GNU extension}}
19 d--; // expected-warning {{arithmetic on a pointer to the function type 'void (S *, void *)' (aka 'void (struct S *, void *)') is a GNU extension}}
20 d -= 1; // expected-warning {{arithmetic on a pointer to the function type 'void (S *, void *)' (aka 'void (struct S *, void *)') is a GNU extension}}
21 (void)(1 + d); // expected-warning {{arithmetic on a pointer to the function type 'void (S *, void *)' (aka 'void (struct S *, void *)') is a GNU extension}}
22 e++; // expected-error {{arithmetic on a pointer to an incomplete type}}
23 }
24