(* Copyright (C) 1989, Digital Equipment Corporation *) (* All rights reserved. *) (* See the file COPYRIGHT for a full description. *) (* Last modified on Tue Jun 25 10:43:54 1991 by muller *) INTERFACE NullRd; IMPORT Rd; TYPE T <: Rd.T; (* A NullRd.T is an empty input stream: len (rd) = 0 src (rd) = 'eof' seekable (rd) = FALSE intermittent (rd) = FALSE *) PROCEDURE New (): T; END NullRd.