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70 lines
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70 lines
2.7 KiB
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<title>Logtalk built-in predicate: define_events/5</title>
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<div class="top-left">Logtalk reference manual</div>
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<div class="top-right">Built-in predicate: define_events/5</div>
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<div class="navtop"><a href="../../index.html">contents</a> > <a href="../index.html">reference manual</a> > <a href="../index.html#builtins">built-in predicates</a></div>
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<h2 id="builtins_define_events5" class="codenp">define_events/5</h2>
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<h4>Description</h4>
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<pre>define_events(Event, Object, Message, Sender, Monitor)</pre>
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<p>
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Defines a new set of events. The two types of events are represented by the atoms <code>before</code> and <code>after</code>.
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</p>
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<h4>Template and modes</h4>
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<pre>define_events(@event, @object_identifier, @callable, @object_identifier, +object_identifier)</pre>
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<h4>Errors</h4>
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<dl>
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<dt>Event is neither a variable nor a valid event identifier:</dt>
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<dd><code>type_error(event, Event)</code></dd>
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<dt>Object is neither a variable nor a valid object identifier:</dt>
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<dd><code>type_error(object_identifier, Object)</code></dd>
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<dt>Message is neither a variable nor a callable term:</dt>
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<dd><code>type_error(callable, Message)</code></dd>
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<dt>Sender is neither a variable nor a valid object identifier:</dt>
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<dd><code>type_error(object_identifier, Sender)</code></dd>
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<dt>Monitor is a variable:</dt>
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<dd><code>instantiation_error</code></dd>
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<dt>Monitor is neither a variable nor a valid object identifier:</dt>
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<dd><code>type_error(object_identifier, Monitor)</code></dd>
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</dl>
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<h4>Examples</h4>
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<pre>| ?- define_events(_, list, member(_, _), _ , debugger).</pre>
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<span>Copyright © <a href="mailto:pmoura@logtalk.org">Paulo Moura</a> — <a href="http://logtalk.org">Logtalk.org</a></span><br/>
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<span>Last updated on: October 26, 2006</span>
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