1 // RUN: %clang_cc1 %s -fsyntax-only -verify -pedantic 2 3 typedef struct S S; // expected-note 3 {{forward declaration of 'struct S'}} 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
