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Logtalk - Object oriented extension to Prolog
Release 2.29.4
Copyright (c) 1998-2007 Paulo Moura. All Rights Reserved.
To load this example and for sample queries, please see the SCRIPT file.
This folder contains examples of public, protected, and private inheritance,
for both prototype-based and class-based hierarchies.
This example defines a category named "predicates" which specifies three
predicates, one public, one protected, and one private. This category is
imported by the root objects: "parent" for the prototype hierarchy and
"root" for the class hierarchy. Each root object have a set of three
descendants, each one using one of the inheritance types.
The two object hierarchies are organized as follows:
parent
prototype1 % public inheritance
descendant1
prototype2 % protected inheritance
descendant2
prototype3 % private inheritance
descendant3
root
subclass1 % public inheritance
instance1
subclass2 % protected inheritance
instance2
subclass3 % private inheritance
instance3
A second category named "interface", imported by all objects except the
sub-class instances, allows us to query the objects about their interfaces.
