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add-direct-subclass.html
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<HTML>
<HEAD>
<TITLE>add-direct-subclass</TITLE>
<LINK rel="stylesheet" type="text/css" href="clos-mop.css">
</HEAD>
<BODY>
<nav><ul class=navigation>
<li class=navigation>
<a href="table-of-contents.html" title="Table of contents"><img src="toc.png" alt="TOC"></a>
</li>
<li class=navigation>
<a href="all-no-methods.html" title="Up"><img src="up.png" alt="Up"></a>
</li>
</ul></nav>
<A NAME="add-direct-subclass"><I>Generic Function</I> <B>ADD-DIRECT-SUBCLASS</B>
<P><B>Syntax:</B></P>
<P><B>add-direct-subclass</B> <I>superclass</I> <I>subclass</I> =>
<I>unspecified</I>
<P><B>Arguments and values:</B></P>
<P><I>superclass</I> -- A class metaobject.</P>
<P><I>subclass</I> -- A class metaobject.</P>
<P><B>Description:</B></P>
<p>
This generic function is called to maintain a set of backpointers from
a class to its direct subclasses. This generic function adds
<I>subclass</I> to the set of direct subclasses of <I>superclass</I>.
</p>
<p>
When a class is initialized, this generic function is called once for each
direct superclass of the class.
</p>
<p>
When a class is reinitialized, this generic function is called once for each
added direct superclass of the class. The generic function
<a href="remove-direct-subclass.html"><B>remove-direct-subclass</B></a>
is called once for each deleted direct superclass of
the class.
</p>
<P><B>Methods:</B></P>
<table>
<tr>
<td><a href="add-direct-subclass-class-class.html">
<B>add-direct-subclass</B> (<I>superclass</I> class)
(<I>subclass</I> class)</a>
</td>
</tr>
</table>
</BODY>
</HTML>