git.ozlabs.org Git - ccan/blob - ccan/typesafe_cb/test/compile_fail-cast_if_type.c

   1 #include "typesafe_cb/typesafe_cb.h"
   2
   3 void _set_some_value(void *val);
   4
   5 void _set_some_value(void *val)
   6 {
   7 }
   8
   9 #define set_some_value(expr)                                            \
  10         _set_some_value(cast_if_type((expr), unsigned long, void *))
  11
  12 int main(int argc, char *argv[])
  13 {
  14 #ifdef FAIL
  15         int x = 0;
  16         set_some_value(x);
  17 #if !HAVE_TYPEOF||!HAVE_BUILTIN_CHOOSE_EXPR||!HAVE_BUILTIN_TYPES_COMPATIBLE_P
  18 #error "Unfortunately we don't fail if cast_if_type is a noop."
  19 #endif
  20 #else
  21         void *p = 0;
  22         set_some_value(p);
  23 #endif
  24         return 0;
  25 }