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; 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
