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
IMPORT Interval, Region;
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;