module Regexp:
Regular expressions.
| Parameters: | 
  | 
type t = 
| | 
Letter of  | 
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Union of  | 
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Empty | 
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Concat of  | 
(* | concatenation  | *) | 
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Singl | 
(* | empty word singleton  | *) | 
| | 
Star of  | 
val letter : X.t -> t
val union : t -> t -> t
val empty : t
val concat : t -> t -> t
val star : t -> t
val unions : t list -> t
val to_string : t -> string
val simpl : t -> t
val simpl : t -> t
module Series:Series.Make(Field.Int)
val series : t -> Series.tGenerating series of a regular expression. This expression is assumed to be unambiguous.