String (uutf.Uutf.String)

val encoding_guess : string -> [ `UTF_16BE | `UTF_16LE | `UTF_8 ] * bool

type !'a folder =
  'a ->
  int ->
  [ `Malformed of string | `Uchar of Uchar.t ] ->
  'a

val fold_utf_8 : ?pos:int -> ?len:int -> 'a folder -> 'a -> string -> 'a

val fold_utf_16be : ?pos:int -> ?len:int -> 'a folder -> 'a -> string -> 'a

val fold_utf_16le : ?pos:int -> ?len:int -> 'a folder -> 'a -> string -> 'a