int list_length_(void*_list);
void*list_clone_(void*_list);
void list_append_(void*_list, void*entry);
+void list_prepend_(void*_list, void*entry);
void list_free_(void*_list);
#define list_new() ((void*)0)
#define list_append(list, e) {sizeof((list)->next);list_append_(&(list),(e));}
+#define list_prepend(list, e) {sizeof((list)->next);list_prepend_(&(list),(e));}
#define list_free(list) {sizeof((list)->next);list_free_(&(list));}
#define list_clone(list) (sizeof((list)->next),list_clone_(&(list)))
#define list_length(list) (sizeof((list)->next),list_length_(list))