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<title>Logtalk built-in predicate: protocol_property/2</title>
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<div class="top-left">Logtalk reference manual</div>
<div class="top-right">Built-in predicate: protocol_property/2</div>
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<h2 class="codenp">protocol_property/2<span id="builtins_protocol_property2"/></h2>
<h4>Description</h4>
<pre>protocol_property(Protocol, Property)</pre>
<p>
Enumerates, by backtracking, the properties associated with the currently defined protocols.
</p>
<h4>Template and modes</h4>
<pre>protocol_property(?protocol_identifier, ?protocol_property)</pre>
<h4>Errors</h4>
<dl>
<dt>Protocol is neither a variable nor a valid protocol identifier:</dt>
<dd><code>type_error(protocol_identifier, Protocol)</code></dd>
<dt>Property is neither a variable nor a valid protocol property:</dt>
<dd><code>domain_error(protocol_property, Property)</code></dd>
</dl>
<h4>Examples</h4>
<pre>| ?- protocol_property(listp, Property).</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/>
<span>Last updated on: October 26, 2006</span>
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