src/llvm/tools/clang/test/Sema/pointer-addition.c

   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 }