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yap-6.3/Logtalk/manuals/refman/builtins/create_protocol3.html
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<title>Logtalk built-in predicate: create_protocol/3</title>
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<h2><code>create_protocol/3</code></h2>
<h4>Description</h4>
<blockquote>
<pre>create_protocol(Identifier, Relations, Directives)</pre>
<p>
Creates a new, dynamic, protocol.
</p>
</blockquote>
<h4>Template and modes</h4>
<blockquote>
<pre>create_protocol(+protocol_identifier, +list, +list)</pre>
</blockquote>
<h4>Errors</h4>
<blockquote>
<dl>
<dt>Identifier is a variable:</dt>
<dd><code>instantiation_error</code></dd>
<dt>Identifier is not a valid protocol identifier:</dt>
<dd><code>type_error(protocol_identifier, Identifier)</code></dd>
<dt>Identifier is already in use:</dt>
<dd><code>permission_error(replace, category, Identifier)</code></dd>
<dd><code>permission_error(replace, object, Identifier)</code></dd>
<dd><code>permission_error(replace, protocol, Identifier)</code></dd>
<dt>Relations is not a list:</dt>
<dd><code>type_error(list, Relations)</code></dd>
<dt>Directives is not a list:</dt>
<dd><code>type_error(list, Directives)</code></dd>
</dl>
</blockquote>
<h4>Examples</h4>
<blockquote>
<pre>| ?- create_protocol(foo, [extends(bar)], [public(foo/1)]).</pre>
</blockquote>
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