Copyright (C) 1992, Digital Equipment Corporation                         
 All rights reserved.                                                      
 See the file COPYRIGHT for a full description.                            
                                                                           
 by Steve Glassman, Mark Manasse and Greg Nelson           
 Last modified on Tue Feb 11 16:24:34 PST 1992 by muller   
      modified on Wed Sep 11 15:19:39 PDT 1991 by msm      
<*PRAGMA LL*>
INTERFACE RegionRep;
IMPORT Interval, Region;
TYPE
  HList = REF ARRAY OF Interval.T;
  VEntry = RECORD v: Interval.T; h: HList END;
  VList = Region.P;
REVEAL Region.P = BRANDED REF ARRAY OF VEntry;
END RegionRep.