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

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