1// RUN: %clang_cc1 %s -fsyntax-only -verify -pedantic -std=c11
2
3typedef struct S S; // expected-note 4 {{forward declaration of 'struct S'}}
4extern _Atomic(S*) e;
5void 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 *)' 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--;       // expected-warning {{arithmetic on a pointer to the function type 'void (S *, void *)' is a GNU extension}}
20  d -= 1;    // expected-warning {{arithmetic on a pointer to the function type 'void (S *, void *)' is a GNU extension}}
21  (void)(1 + d); // expected-warning {{arithmetic on a pointer to the function type 'void (S *, void *)' is a GNU extension}}
22  e++;       // expected-error {{arithmetic on a pointer to an incomplete type}}
23}
24