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

   1 #include <ccan/typesafe_cb/typesafe_cb.h>
   2 #include <stdlib.h>
   3
   4 static void _register_callback(void (*cb)(void *arg, int x), void *arg)
   5 {
   6         (void)cb;
   7         (void)arg;
   8 }
   9 #define register_callback(cb, arg)                              \
  10         _register_callback(typesafe_cb_postargs(void, void *, (cb), (arg), int), (arg))
  11
  12 static void my_callback(char *p, int x)
  13 {
  14         (void)p;
  15         (void)x;
  16 }
  17
  18 int main(void)
  19 {
  20 #ifdef FAIL
  21         int *p;
  22 #if !HAVE_TYPEOF||!HAVE_BUILTIN_CHOOSE_EXPR||!HAVE_BUILTIN_TYPES_COMPATIBLE_P
  23 #error "Unfortunately we don't fail if typesafe_cb_cast is a noop."
  24 #endif
  25 #else
  26         char *p;
  27 #endif
  28         p = NULL;
  29         register_callback(my_callback, p);
  30         return 0;
  31 }