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<html><head>
<title>cl:values-list</title>
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<a href="../../start.htm">Nyquist / XLISP 2.0</a> -
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<hr>
<h1>cl:values-list</h1>
<hr>
<p>The <nobr>cl:<b>values-list</b></nobr> function returns the elements of a
list unevaluated as multiple values:</p>
<p><div class="box">
<dl>
<dt>(cl:<b>values-list</b> <i>list</i>)</dt>
<dd><i>list</i> - a list of values<br>
returns - the elements of the list as multiple values</dd>
</dl>
</div></p>
<pre class="example">
(defun <font color="#0000CC">cl:values-list</font> (list)
(or (listp list) (error <font color="#880000">"not a list"</font> list))
(or (null list) (consp (last list)) (error <font color="#880000">"not a proper list"</font> list))
(setq <font color="#AA5500">*rslt*</font> list
<font color="#AA5500">cl:*multiple-values*</font> t)
(first list))
</pre>
<p>The unevaluated first value from the list is returned as the primary
return value, and the list is assigned to the Nyquist
<a href="../../reference/global-rslt.htm">*rslt*</a> variable. <nobr>If
an</nobr> an empty list is given, <a href="../../reference/nil.htm">NIL</a>
is returned and the <a href="../../reference/global-rslt.htm">*rslt*</a>
variable is set <nobr>to <a href="../../reference/nil.htm">NIL</a></nobr>.
<nobr>An error</nobr> is signalled if the 'list' argument is not a list or
if the list does not end
<nobr>with <a href="../../reference/nil.htm">NIL</a></nobr>.</p>
<p><nobr>The
<a href="global-multiple-values.htm">cl:*multiple-values*</a></nobr>
variable is set <nobr>to
<a href="../../reference/t.htm"> T </a></nobr> to indicate that
multiple values are returned.</p>
<p>Examples:</p>
<pre class="example">
(cl:values-list nil) => NIL <font color="#008844">; *rslt* = NIL</font>
(cl:values-list '(1)) => 1 <font color="#008844">; *rslt* = (1)</font>
(cl:values-list '(1 2)) => 1 <font color="#008844">; *rslt* = (1 2)</font>
(cl:values-list '(1 2 3)) => 1 <font color="#008844">; *rslt* = (1 2 3)</font>
(cl:values-list '(1 2 . 3)) => <font color="#AA0000">error: not a proper list - (1 2 . 3)</font>
</pre>
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