git.ozlabs.org Git - ccan/blob - ccan/cast/test/compile_fail-cast_signed-const.c

   1 #include <ccan/cast/cast.h>
   2 #include <stdlib.h>
   3
   4 int main(void)
   5 {
   6         unsigned char *uc;
   7 #ifdef FAIL
   8         const
   9 #endif
  10         char
  11                 *p = NULL;
  12
  13         uc = cast_signed(unsigned char *, p);
  14         (void) uc; /* Suppress unused-but-set-variable warning. */
  15         return 0;
  16 }
  17
  18 #ifdef FAIL
  19 #if !HAVE_TYPEOF||!HAVE_BUILTIN_CHOOSE_EXPR||!HAVE_BUILTIN_TYPES_COMPATIBLE_P
  20 #error "Unfortunately we don't fail if cast_const can only use size"
  21 #endif
  22 #endif