gcc/testsuite/gcc.dg/pointer-arith-6.c

   1 /* Test diagnostics for sizeof on void and function types.  Test with
   2    -Wpointer-arith.  */
   3 /* Origin: Joseph Myers <joseph@codesourcery.com> */
   4 /* { dg-do compile } */
   5 /* { dg-options "-Wpointer-arith" } */
   6
   7 extern const void v;
   8 void f(void);
   9
  10 void
  11 g (void)
  12 {
  13   sizeof (v); /* { dg-warning "warning: invalid application of 'sizeof' to a void type" } */
  14   sizeof (void); /* { dg-warning "warning: invalid application of 'sizeof' to a void type" } */
  15   sizeof (f); /* { dg-warning "warning: invalid application of 'sizeof' to a function type" } */
  16   sizeof (void (void)); /* { dg-warning "warning: invalid application of 'sizeof' to a function type" } */
  17 }