gcc/testsuite/gcc.dg/c90-const-expr-10.c

   1 /* Test for constant expressions: invalid null pointer constants in
   2    various contexts (make sure NOPs are not inappropriately
   3    stripped).  */
   4 /* Origin: Joseph Myers <joseph@codesourcery.com> */
   5 /* { dg-do compile } */
   6 /* { dg-options "-std=iso9899:1990 -pedantic-errors" } */
   7
   8 __extension__ typedef __SIZE_TYPE__ size_t;
   9
  10 void *p = (size_t)(void *)0; /* { dg-error "without a cast" } */
  11 struct s { void *a; } q = { (size_t)(void *)0 }; /* { dg-error "without a cast|near initialization" } */
  12 void *
  13 f (void)
  14 {
  15   void *r;
  16   r = (size_t)(void *)0; /* { dg-error "without a cast" } */
  17   return (size_t)(void *)0; /* { dg-error "without a cast" } */
  18 }
  19 void g (void *); /* { dg-message "but argument is of type" } */
  20 void
  21 h (void)
  22 {
  23   g ((size_t)(void *)0); /* { dg-error "without a cast" } */
  24 }
  25 void g2 (int, void *); /* { dg-message "but argument is of type" } */
  26 void
  27 h2 (void)
  28 {
  29   g2 (0, (size_t)(void *)0); /* { dg-error "without a cast" } */
  30 }