-struct date_value make_date_value(Date_value_type t, struct date d1,
- struct date d2, const char* p);
-void copy_date(struct date *to, struct date from);
+struct date_value* make_date_value(Date_value_type t, struct date *d1,
+ struct date *d2, const char* p);
+void copy_date(struct date *to, struct date *from);