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

   1 #include <ccan/typesafe_cb/typesafe_cb.h>
   2 #include <stdlib.h>
   3
   4 static void _register_callback(void (*cb)(void *arg), void *arg)
   5 {
   6 }
   7
   8 #define register_callback(cb, arg)                              \
   9         _register_callback(typesafe_cb(void, (cb), (arg)), (arg))
  10
  11 static void my_callback(char *p)
  12 {
  13 }
  14
  15 int main(int argc, char *argv[])
  16 {
  17 #ifdef FAIL
  18         int *p;
  19 #if !HAVE_TYPEOF||!HAVE_BUILTIN_CHOOSE_EXPR||!HAVE_BUILTIN_TYPES_COMPATIBLE_P
  20 #error "Unfortunately we don't fail if cast_if_type is a noop."
  21 #endif
  22 #else
  23         char *p;
  24 #endif
  25         p = NULL;
  26
  27         /* This should work always. */
  28         register_callback(my_callback, "hello world");
  29
  30         /* This will fail with FAIL defined */
  31         register_callback(my_callback, p);
  32         return 0;
  33 }