42aabce1bb
git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@1973 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
26 lines
1.1 KiB
Plaintext
26 lines
1.1 KiB
Plaintext
================================================================
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Logtalk - Open source object-oriented logic programming language
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Release 2.30.7
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Copyright (c) 1998-2007 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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You will also need to load the following files in the library directory:
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events_loader, types_loader, metapredicates_loader, and hierarchies_loader.
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Alternatively, you may load the library all_loader file to load all library
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entities.
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This folder contains an example of representation and handling of
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relations using events. We have instances of class brick and a binary
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brick_stack relation between the bricks. Every time we move a brick, we
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want the bricks on top of it to move along. If we break the stack by
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moving a middle brick, we want to automatically destroy the
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corresponding relation tuple.
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It's instructive to use the event debugger in the Logtalk library (loader
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file debugging_loader.lgt) to better understand this example. Set spy points
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in all brick instances and then activate the debugger.
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