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<!DOCTYPE HTML>
<HTML LANG="en-us"
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>built-in-class | Common Lisp Nova Spec</TITLE
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>built-in-class</B
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><TD ALIGN="RIGHT" VALIGN="BASELINE" WIDTH="0" NOWRAP="NOWRAP" CLASS="ftype"
><I
>System</I
> <I
>Class</I
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>built-in-class</B
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>, <A HREF="t_class.html" CLASS="typeref"
><B
>class</B
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>standard-object</B
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><B
>t</B
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></P
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><DT
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>Description</B
></DT
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><P CLASS="j"
>A <A HREF="26_1_Glossary.html#built-in_class"
><EM CLASS="term"
>built-in class</EM
></A
> is a <A HREF="26_1_Glossary.html#class"
><EM CLASS="term"
>class</EM
></A
> whose <A HREF="26_1_Glossary.html#instance"
><EM CLASS="term"
>instances</EM
></A
> have restricted capabilities or special representations. Attempting to use <A HREF="f_defclass.html" CLASS="macref"
><B
>defclass</B
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>subclasses</EM
></A
> of a <A HREF="26_1_Glossary.html#built-in_class"
><EM CLASS="term"
>built-in class</EM
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> signals an error of <A HREF="26_1_Glossary.html#type"
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>type</EM
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>error</B
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><EM CLASS="term"
>instance</EM
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> of a <A HREF="26_1_Glossary.html#built-in_class"
><EM CLASS="term"
>built-in class</EM
></A
> signals an error of <A HREF="26_1_Glossary.html#type"
><EM CLASS="term"
>type</EM
></A
> <A HREF="t_error.html" CLASS="typeref"
><B
>error</B
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>. Calling <A HREF="f_slot-value.html" CLASS="funref"
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>slot-value</B
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> on an <A HREF="26_1_Glossary.html#instance"
><EM CLASS="term"
>instance</EM
></A
> of a <A HREF="26_1_Glossary.html#built-in_class"
><EM CLASS="term"
>built-in class</EM
></A
> signals an error of <A HREF="26_1_Glossary.html#type"
><EM CLASS="term"
>type</EM
></A
> <A HREF="t_error.html" CLASS="typeref"
><B
>error</B
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>. Redefining a <A HREF="26_1_Glossary.html#built-in_class"
><EM CLASS="term"
>built-in class</EM
></A
> or using <A HREF="f_change-class.html" CLASS="funref"
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> to change the <A HREF="26_1_Glossary.html#class"
><EM CLASS="term"
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> of an <A HREF="26_1_Glossary.html#instance"
><EM CLASS="term"
>instance</EM
></A
> to or from a <A HREF="26_1_Glossary.html#built-in_class"
><EM CLASS="term"
>built-in class</EM
></A
> signals an error of <A HREF="26_1_Glossary.html#type"
><EM CLASS="term"
>type</EM
></A
> <A HREF="t_error.html" CLASS="typeref"
><B
>error</B
></A
>. However, <A HREF="26_1_Glossary.html#built-in_class"
><EM CLASS="term"
>built-in classes</EM
></A
> can be used as <A HREF="26_1_Glossary.html#parameter_specializer"
><EM CLASS="term"
>parameter specializers</EM
></A
> in <A HREF="26_1_Glossary.html#method"
><EM CLASS="term"
>methods</EM
></A
>.</P
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