val mutable db = None (* mutable only to initialize it :-( *)
method parser_db = match db with None -> assert false | Some x -> x
method set_parser_db v = {< db = Some v >}
val mutable db = None (* mutable only to initialize it :-( *)
method parser_db = match db with None -> assert false | Some x -> x
method set_parser_db v = {< db = Some v >}