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git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@1191 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
20 行
909 B
Plaintext
20 行
909 B
Plaintext
=================================================================
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Logtalk - Object oriented extension to Prolog
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Release 2.22.0
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Copyright (c) 1998-2004 Paulo Moura. All Rights Reserved.
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=================================================================
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To load this example and for sample queries, please see the SCRIPT file.
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This folder contains an example that shows how to implement class variables
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as defined in Smalltalk. The name shared instance variables is however much
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more accurate. In systems like Logtalk that enable the use of explicit
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metaclasses, true class variables are just the class (as an object) own
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instance variables!
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This example defines a root class (root) and three instances (instance1,
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instance2, and instance3). The root class defines a shared instance variable
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(using a dynamic predicate) and the setter and getter methods which implement
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the variable sharing behavior. |