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<html><head><title>XLISP :show</title>
<link rel="stylesheet" type="text/css" href="reference.css">
</head>
<body>
<a href="../start.htm">Nyquist / XLISP 2.0</a> -
<a href="../manual/contents.htm">Contents</a> |
<a href="../tutorials/tutorials.htm">Tutorials</a> |
<a href="../examples/examples.htm">Examples</a> |
<a href="reference-index.htm">Reference</a>
<hr>
<h1>:show</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>message selector</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 <i>object</i> :show)</dt>
<dd><i>object</i> - an existing <a href="object.htm">object</a><br>
returns - the <i>object</i></dd>
</dl>
<h2>Description</h2>
<p>The ':show' message selector attempts to find the 'show' method in the
specified <a href="object.htm">object</a>s class. Since the ':show'
message selector is built-in in the root
<a href="class.htm">class</a>, this is always a valid message
selector. The <a href="object.htm">object</a> must already
exist.</p>
<h2>Examples</h2>
<pre class="example">
(setq my-class (send class :new '(state))) <font color="#008844">; create MY-CLASS with STATE</font>
(send my-class :answer :isnew '() <font color="#008844">; set up initialization</font>
'((setq state nil) self))
(send my-class :answer :set-it '(value) <font color="#008844">; create :SET-IT message</font>
'((setq state value)))
(setq my-obj (send my-class :new)) <font color="#008844">; create MY-OBJ of MY-CLASS</font>
(send my-obj :show) <font color="#008844">; returns object state including STATE = NIL</font>
(send my-obj :set-it 5) <font color="#008844">; STATE is set to 5</font>
(send new-obj :show) <font color="#008844">; error: unbound variable</font>
</pre>
<p>See the
<a href="../manual/xlisp-man-010.htm#object-show">:show</a>
message selector in the <nobr>XLISP 2.0</nobr> manual.</p>
<p><nobr> <a href="#top">Back to Top</nobr></a></p>
<hr>
<a href="../start.htm">Nyquist / XLISP 2.0</a> -
<a href="../manual/contents.htm">Contents</a> |
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<a href="../examples/examples.htm">Examples</a> |
<a href="reference-index.htm">Reference</a>
</body></html>
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