pointer-addition.c revision c983b86514d14dd4b30147bf6791dde9487d2c3f 
1// RUN: clang %s -fsyntax-only -verify -pedantic
2
3typedef struct S S; // expected-note{{forward declaration of 'struct S'}}
4void a(S* b, void* c) {
5  void (*fp)(int) = 0;
6  b++;       // expected-error {{arithmetic on pointer to incomplete type}}
7  b += 1;    // expected-error {{arithmetic on pointer to incomplete type}}
8  c++;       // expected-warning {{use of GNU void* extension}}
9  c += 1;    // expected-warning {{use of GNU void* extension}}
10  c--;       // expected-warning {{use of GNU void* extension}}
11  c -= 1;    // expected-warning {{use of GNU void* extension}}
12  b = 1+b;   // expected-error {{arithmetic on pointer to incomplete type}}
13  /* The next couple tests are only pedantic warnings in gcc */
14  void (*d)(S*,void*) = a;
15  d += 1;    // expected-warning {{arithmetic on pointer to function type 'void (*)(S *, void *)' is a GNU extension}}
16  d++;       // expected-warning {{arithmetic on pointer to function type 'void (*)(S *, void *)' is a GNU extension}}}
17  d--;       // expected-warning {{arithmetic on pointer to function type 'void (*)(S *, void *)' is a GNU extension}}
18  d -= 1;    // expected-warning {{arithmetic on pointer to function type 'void (*)(S *, void *)' is a GNU extension}}
19}
20