20dcf89f9a
git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@1171 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
38 lines
632 B
Plaintext
38 lines
632 B
Plaintext
=================================================================
|
|
Logtalk - Object oriented extension to Prolog
|
|
Release 2.21.5
|
|
|
|
Copyright (c) 1998-2004 Paulo Moura. All Rights Reserved.
|
|
=================================================================
|
|
|
|
|
|
% start by loading the example:
|
|
|
|
| ?- logtalk_load(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
|