lib/ccan/container_of/test/compile_fail-var-types.c

   1 #include <ccan/container_of/container_of.h>
   2 #include <stdlib.h>
   3
   4 struct foo {
   5         int a;
   6         char b;
   7 };
   8
   9 int main(int argc, char *argv[])
  10 {
  11         struct foo foo = { .a = 1, .b = 2 }, *foop;
  12         int *intp = &foo.a;
  13
  14 #ifdef FAIL
  15         /* b is a char, but intp is an int * */
  16         foop = container_of_var(intp, foop, b);
  17 #if !HAVE_TYPEOF
  18 #error "Unfortunately we don't fail if we don't have typeof."
  19 #endif
  20 #else
  21         foop = NULL;
  22 #endif
  23         (void) foop; /* Suppress unused-but-set-variable warning. */
  24         return intp == NULL;
  25 }