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yap-6.3/Logtalk/examples/roots/SCRIPT.txt
pmoura 46c8cfbeff Logtalk 2.29.4 files.
git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@1799 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
2007-02-19 18:58:28 +00:00

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=================================================================
Logtalk - Object oriented extension to Prolog
Release 2.29.4
Copyright (c) 1998-2007 Paulo Moura. All Rights Reserved.
=================================================================
% start by loading the necessary library support files (if not
% already loaded):
| ?- logtalk_load([library(events_loader), library(types_loader), library(hierarchies_loader)]).
...
% now you are ready for loading the example:
| ?- logtalk_load(roots(loader)).
...
% some queries dealing with instance/class hierarchies:
| ?- object::ancestors(Ancestors).
Ancestors = [class, abstract_class, object]
Yes
| ?- class::instances(Instances).
Instances = [object, abstract_class, class]
Yes
| ?- class::superclass(Super).
Super = abstract_class ;
Super = object ;
No