#ifndef CAST_TYPE
#define CAST_TYPE List_linked
#endif

typedef struct link *link_t;

struct link {
  link_t nextLink;
};

@interface List
{
@public
  link_t firstLink;
}
@end

@interface ListIndex_linked
{
@public
  List *collection;
  link_t link;
}

@end

@interface List_linked: List
@end

@implementation List
@end

@implementation ListIndex_linked
- next
{
   if (link->nextLink != ((CAST_TYPE *) collection)->firstLink)
      {
      }
}
@end

int main (int argc, const char **argv) {}