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<html><head><title>XLISP send-super</title>
<link rel="stylesheet" type="text/css" href="reference.css">
</head>
<body>
<a href="../start.htm">Nyquist / XLISP 2.0</a> -
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<a href="reference-index.htm">Reference</a>
<hr>
<h1>send-super</h1>
<hr>
<p><table cellpadding="0" cellspacing="0" style="margin-left:10px"><tbody>
<tr valign="top">
<td><nobr>Type:</nobr></td>
<td><nobr> - </nobr></td>
<td width="100%"><nobr>function (subr)</nobr></td>
</tr>
<tr valign="top">
<td><nobr>Source:</nobr></td>
<td><nobr> - </nobr></td>
<td width="100%"><nobr>xlobj.c</nobr></td>
</tr>
</tbody></table></p>
<h2>Syntax</h2>
<dl>
<dt>(send-super <i>message</i> [<i>args</i>])</dt>
<dd><i>message</i> - the message selector<br>
<i>args</i> - the optional message arguments<br>
returns - the result of sending the message</dd>
</dl>
<h2>Description</h2>
<p>The 'send-super' function sends the specified arguments 'args' to the
'message' specified method of the superclass. It is necessary for
'send-super' to be executed from within a method being performed on an
<a href="object.htm">object</a>. It will return the result of
sending the message. If 'send-super' is performed outside of a method an
error will result.</p>
<pre class="example">
<font color="#AA0000">error: not in a method</font>
</pre>
<h2>Examples</h2>
<pre class="example">
(setq a-class (send class :new '())) <font color="#008844">; create A-CLASS</font>
(send a-class :answer :show '() <font color="#008844">; set up special SHOW method</font>
'((print "nobody here") self))
(setq an-obj (send a-class :new)) <font color="#008844">; create AN-OBJ of A-CLASS</font>
(send an-obj :show) <font color="#008844">; prints "nobody here"</font>
(send a-class :answer :myshow '() <font color="#008844">; set up MYSHOW method which</font>
'((send-super :show ))) <font color="#008844">; calls :SHOW in superclass</font>
(send an-obj :myshow) <font color="#008844">; prints Object is ...</font>
</pre>
<p>See the
<a href="../manual/xlisp-man-010.htm#10-4">send-super</a>
function in the <nobr>XLISP 2.0</nobr> manual.</p>
<p><nobr> <a href="#top">Back to Top</nobr></a></p>
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