dispenser.sa
Generated by gen_html_sa_files from ICSI. Contact gomes@icsi.berkeley.edu for details
-------------------------> GNU Sather - sourcefile <-------------------------
-- Copyright (C) 1995 by International Computer Science Institute --
-- This file is part of the GNU Sather library. It is free software; you may --
-- redistribute and/or modify it under the terms of the GNU Library General --
-- Public License (LGPL) as published by the Free Software Foundation; --
-- either version 2 of the license, or (at your option) any later version. --
-- This library is distributed in the hope that it will be useful, but --
-- WITHOUT ANY WARRANTY without even the implied warranty of MERCHANTABILITY --
-- or FITNESS FOR A PARTICULAR PURPOSE. See Doc/LGPL for more details. --
-- The license text is also available from: Free Software Foundation, Inc., --
-- 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA --
--------------> Please email comments to <bug-sather@gnu.org> <--------------
-- dispenser.sa: Dispenser abstraction
-- Author: Benedict A. Gomes <gomes@samosa.ICSI.Berkeley.EDU>
abstract class $DISPENSER{ETP} < $CONTAINER{ETP}
abstract class $DISPENSER{ETP} < $CONTAINER{ETP} is
-- A dispenser is an abstraction that only permits the removal
-- of one element at a time.
-- This abstraction just permits the non-modifying operations
-- and is mainly to organize the collection of classes (to ensure
-- that they all have certain basic features like size).
-- We do not currently believe that an abstract dispenser will show
-- up in actual code...
size: INT;
-- Number of items in the dispenser
current: ETP;
-- Return the current item
remove: ETP;
-- Return the current item and advance
elt!: ETP;
-- Return the elements of the dispenser in some *undefined* order.
-- Particular abstractions might define a stronger ordering relation
end;