module Make:
val flatten_tree : Structure.tree -> Structure.symbol list list
val print_symbol : Format.formatter -> Structure.symbol -> unit
val print_meta : Format.formatter -> string -> Structure.symbol list -> unit
val print_symbol1 : Format.formatter -> Structure.symbol -> unit
val print_rule : Format.formatter -> Structure.symbol list -> unit
val print_level : Format.formatter ->
(Format.formatter -> unit -> unit) -> Structure.symbol list list -> unit
val levels : Format.formatter -> Structure.level list -> unit
val entry : Format.formatter -> Structure.internal_entry -> unit