37 lines
2.1 KiB
HTML
37 lines
2.1 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3O//DTD W3 HTML 2.0//EN">
|
|
<!Converted with LaTeX2HTML 0.6.5 (Tue Nov 15 1994) by Nikos Drakos (nikos@cbl.leeds.ac.uk), CBLU, University of Leeds >
|
|
<HEAD>
|
|
<TITLE>28.1.8.1. Metaclasses</TITLE>
|
|
</HEAD>
|
|
<BODY>
|
|
<meta name="description" value=" Metaclasses">
|
|
<meta name="keywords" value="clm">
|
|
<meta name="resource-type" value="document">
|
|
<meta name="distribution" value="global">
|
|
<P>
|
|
<b>Common Lisp the Language, 2nd Edition</b>
|
|
<BR> <HR><A NAME=tex2html5270 HREF="node290.html"><IMG ALIGN=BOTTOM ALT="next" SRC="icons/next_motif.gif"></A> <A NAME=tex2html5268 HREF="node288.html"><IMG ALIGN=BOTTOM ALT="up" SRC="icons/up_motif.gif"></A> <A NAME=tex2html5262 HREF="node288.html"><IMG ALIGN=BOTTOM ALT="previous" SRC="icons/previous_motif.gif"></A> <A NAME=tex2html5272 HREF="node1.html"><IMG ALIGN=BOTTOM ALT="contents" SRC="icons/contents_motif.gif"></A> <A NAME=tex2html5273 HREF="index.html"><IMG ALIGN=BOTTOM ALT="index" SRC="icons/index_motif.gif"></A> <BR>
|
|
<B> Next:</B> <A NAME=tex2html5271 HREF="node290.html"> Standard Metaclasses</A>
|
|
<B>Up:</B> <A NAME=tex2html5269 HREF="node288.html"> Meta-objects</A>
|
|
<B> Previous:</B> <A NAME=tex2html5263 HREF="node288.html"> Meta-objects</A>
|
|
<HR> <P>
|
|
<H3><A NAME=SECTION003218100000000000000>28.1.8.1. Metaclasses</A></H3>
|
|
<P>
|
|
<img align=bottom alt="change_begin" src="gif/change_begin.gif"><br>
|
|
The <i>metaclass</i> of an object is the class of its class. The
|
|
metaclass determines the representation of instances of its instances and
|
|
the forms of inheritance used by its instances for slot descriptions and
|
|
method inheritance. The metaclass mechanism can be used to provide
|
|
particular forms of optimization or to tailor the Common Lisp Object System for particular
|
|
uses. The protocol for defining metaclasses is discussed in the third part
|
|
of the CLOS specification, The Common Lisp Object System Meta-Object Protocol.
|
|
[The third part
|
|
has not yet been approved by X3J13 for inclusion in the forthcoming
|
|
Common Lisp standard and is not included in this book.-GLS]
|
|
<br><img align=bottom alt="change_end" src="gif/change_end.gif">
|
|
<P>
|
|
<HR>
|
|
<P><ADDRESS>
|
|
AI.Repository@cs.cmu.edu
|
|
</ADDRESS>
|
|
</BODY>
|