-#include <ccan/typesafe_cb/typesafe_cb.h>
-#include <stdlib.h>
-
-static void _register_callback(void (*cb)(void *arg), const void *arg)
-{
-}
-
-#define register_callback(cb, arg) \
- _register_callback(typesafe_cb_exact(void, (cb), (arg)), (arg))
-
-static void my_callback(const char *p)
-{
-}
-
-int main(int argc, char *argv[])
-{
-#ifdef FAIL
- char *p;
-#if !HAVE_TYPEOF||!HAVE_BUILTIN_CHOOSE_EXPR||!HAVE_BUILTIN_TYPES_COMPATIBLE_P
-#error "Unfortunately we don't fail if cast_if_type is a noop."
-#endif
-#else
- const char *p;
-#endif
- p = NULL;
-
- /* This should work always. */
- register_callback(my_callback, (const char *)"hello world");
-
- /* This will fail with FAIL defined */
- register_callback(my_callback, p);
- return 0;
-}