% BEGIN LICENSE BLOCK
% Version: CMPL 1.1
%
% The contents of this file are subject to the Cisco-style Mozilla Public
% License Version 1.1 (the "License"); you may not use this file except
% in compliance with the License.  You may obtain a copy of the License
% at www.eclipse-clp.org/license.
% 
% Software distributed under the License is distributed on an "AS IS"
% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.  See
% the License for the specific language governing rights and limitations
% under the License. 
% 
% The Original Code is  The ECLiPSe Constraint Logic Programming System. 
% The Initial Developer of the Original Code is  Cisco Systems, Inc. 
% Portions created by the Initial Developer are
% Copyright (C) 2006 Cisco Systems, Inc.  All Rights Reserved.
% 
% Contributor(s): 
% 
% END LICENSE BLOCK
%
%
% Shelf example
%

count_solutions(Goal, Total) :-
	shelf_create(count(0), Shelf),
	(
	    call(Goal),
	    shelf_get(Shelf, 1, Old),
	    New is Old + 1,
	    shelf_set(Shelf, 1, New),
	    fail
	;
	    shelf_get(Shelf, 1, Total)
	),
	shelf_abolish(Shelf).
