sig
type t
exception Bad of string
val of_string : string -> Biocaml_romanNum.t option
val of_string_exn : string -> Biocaml_romanNum.t
val of_int : int -> Biocaml_romanNum.t option
val of_int_exn : int -> Biocaml_romanNum.t
val to_string : Biocaml_romanNum.t -> string
val to_int : Biocaml_romanNum.t -> int
end