sig
type buf
val create : int -> UCS4.Buf.buf
val contents : UCS4.Buf.buf -> UCS4.t
val clear : UCS4.Buf.buf -> unit
val reset : UCS4.Buf.buf -> unit
val add_char : UCS4.Buf.buf -> UChar.t -> unit
val add_string : UCS4.Buf.buf -> UCS4.t -> unit
val add_buffer : UCS4.Buf.buf -> UCS4.Buf.buf -> unit
end