OCaml compiler library : CamlinternalMenhirLib.ErrorReports

`sig
type 'a buffer
val wrap :
(Stdlib.Lexing.lexbuf -> 'token) ->
(Stdlib.Lexing.position * Stdlib.Lexing.position)
CamlinternalMenhirLib.ErrorReports.buffer *
(Stdlib.Lexing.lexbuf -> 'token)
val wrap_supplier :
(unit -> 'token * Stdlib.Lexing.position * Stdlib.Lexing.position) ->
(Stdlib.Lexing.position * Stdlib.Lexing.position)
CamlinternalMenhirLib.ErrorReports.buffer *
(unit -> 'token * Stdlib.Lexing.position * Stdlib.Lexing.position)
val show :
('a -> string) -> 'a CamlinternalMenhirLib.ErrorReports.buffer -> string
val last : 'a CamlinternalMenhirLib.ErrorReports.buffer -> 'a
val extract :
string -> Stdlib.Lexing.position * Stdlib.Lexing.position -> string
val sanitize : string -> string
val compress : string -> string
val shorten : int -> string -> string
val expand : (int -> string) -> string -> string
end`