gcc/testsuite/gcc.dg/pr37561.c

   1 /* PR c++/37561 */
   2 /* { dg-do compile } */
   3
   4 __extension__ __PTRDIFF_TYPE__ p;
   5 char q;
   6
   7 void
   8 foo ()
   9 {
  10   ((char *) p)++;       /* { dg-error "lvalue" } */
  11   ((char *) q)++;       /* { dg-error "lvalue" } */
  12   ((char *) p)--;       /* { dg-error "lvalue" } */
  13   ((char *) q)--;       /* { dg-error "lvalue" } */
  14   ++(char *) p;         /* { dg-error "lvalue" } */
  15   ++(char *) q;         /* { dg-error "lvalue" } */
  16   --(char *) p;         /* { dg-error "lvalue" } */
  17   --(char *) q;         /* { dg-error "lvalue" } */
  18 }
  19
  20 /* { dg-warning "cast to pointer from integer of different size" "" { target *-*-* } 11 } */
  21 /* { dg-warning "cast to pointer from integer of different size" "" { target *-*-* } 13 } */
  22 /* { dg-warning "cast to pointer from integer of different size" "" { target *-*-* } 15 } */
  23 /* { dg-warning "cast to pointer from integer of different size" "" { target *-*-* } 17 } */