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<head><title>ASSOC-KEYWORD.html -- ACL2 Version 3.1</title></head>
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<h2>ASSOC-KEYWORD</h2>look up key in a <code><a href="KEYWORD-VALUE-LISTP.html">keyword-value-listp</a></code>
<pre>Major Section: <a href="PROGRAMMING.html">PROGRAMMING</a>
</pre><p>
If <code>l</code> is a list of even length of the form <code>(k1 a1 k2 a2 ... kn an)</code>,
where each <code>ki</code> is a keyword, then <code>(assoc-keyword key l)</code> is the
first tail of <code>l</code> starting with <code>key</code> if key is some <code>ki</code>, and is
<code>nil</code> otherwise.
<p>
The <a href="GUARD.html">guard</a> for <code>(assoc-keyword key l)</code> is <code>(keyword-value-listp l)</code>.
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