23 lines
1.0 KiB
Plaintext
23 lines
1.0 KiB
Plaintext
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=================================================================
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Logtalk - Object oriented extension to Prolog
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Release 2.8.4
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Copyright (c) 1998-2001 Paulo Moura. All Rights Reserved.
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=================================================================
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To load all objects in this example consult the viewpoints.loader utility
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file (note that the *.loader files are Prolog files).
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Example adopted from the paper "Classifying Prototype-Based Programming
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Languages" by Christophe Dony, Jacques Malenfant and Daniel Bardou.
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This prototype programming example ilustrates how we can do both property
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sharing and value sharing in Logtalk by calling the built-in predicate
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modification methods asserta/1, assertz/1 and retract/1 either in the
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context of "this" or in the context of "self".
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In this example we have a prototype named joePerson, containing general data
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on joe like its age, name or address, and three descendants/viewpoints named
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joeSportsman, joeEmployee, and joeFilmEnthusiast. Each descendant contains
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data related to a particular viewpoint about joe.
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