module Buf:sig..end
type buf
create n creates the buffer which initially can contain
n Unicode characters.val create : int -> bufval contents : buf -> Main.Type.UText.tval contents_string : buf -> Main.Type.UText.ustringval length : buf -> intval clear : buf -> unitval reset : buf -> unitval add_char : buf -> Main.Type.UChar.t -> unitval add_string : buf -> 'a Main.Type.UText.text -> unitval add_buffer : buf -> buf -> unit