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34 lines
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<TITLE>CLHS: Section 4.3.1.1</TITLE>
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<H1><A REV=MADE HREF="http://www.lispworks.com/"><IMG WIDTH=80 HEIGHT=65 ALT="[LISPWORKS]" SRC="../Graphics/LWSmall.gif" ALIGN=Bottom></A><A REL=TOP HREF="../Front/index.htm"><IMG WIDTH=237 HEIGHT=65 ALT="[Common Lisp HyperSpec (TM)]" SRC="../Graphics/CLHS_Sm.gif" ALIGN=Bottom></A> <A REL=PREV HREF="04_ca.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Previous]" SRC="../Graphics/Prev.gif" ALIGN=Bottom></A><A REL=UP HREF="04_ca.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Up]" SRC="../Graphics/Up.gif" ALIGN=Bottom></A><A REL=NEXT HREF="04_cb.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Next]" SRC="../Graphics/Next.gif" ALIGN=Bottom></A></H1>
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<H2>
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4.3.1.1 Standard Metaclasses</H2> <P>
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The object system provides a number of predefined <A REL=DEFINITION HREF="26_glo_m.htm#metaclass"><I>metaclasses</I></A>. These include the <A REL=DEFINITION HREF="26_glo_c.htm#class"><I>classes</I></A> <A REL=DEFINITION HREF="t_std_cl.htm#standard-class"><B>standard-class</B></A>, <A REL=DEFINITION HREF="t_built_.htm#built-in-class"><B>built-in-class</B></A>, and <A REL=DEFINITION HREF="t_stu_cl.htm#structure-class"><B>structure-class</B></A>: <P>
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<P><DL><P>
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<DT>* The <A REL=DEFINITION HREF="26_glo_c.htm#class"><I>class</I></A> <A REL=DEFINITION HREF="t_std_cl.htm#standard-class"><B>standard-class</B></A> is the default <A REL=DEFINITION HREF="26_glo_c.htm#class"><I>class</I></A> of <A REL=DEFINITION HREF="26_glo_c.htm#class"><I>classes</I></A> defined by <A REL=DEFINITION HREF="m_defcla.htm#defclass"><B>defclass</B></A>. <P><DD>
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<DT>* The <A REL=DEFINITION HREF="26_glo_c.htm#class"><I>class</I></A> <A REL=DEFINITION HREF="t_built_.htm#built-in-class"><B>built-in-class</B></A> is the <A REL=DEFINITION HREF="26_glo_c.htm#class"><I>class</I></A> whose <A REL=DEFINITION HREF="26_glo_i.htm#instance"><I>instances</I></A> are <A REL=DEFINITION HREF="26_glo_c.htm#class"><I>classes</I></A> that have special implementations with restricted capabilities. Any <A REL=DEFINITION HREF="26_glo_c.htm#class"><I>class</I></A> that corresponds to a standard <A REL=DEFINITION HREF="26_glo_t.htm#type"><I>type</I></A> might be an <A REL=DEFINITION HREF="26_glo_i.htm#instance"><I>instance</I></A> of <A REL=DEFINITION HREF="t_built_.htm#built-in-class"><B>built-in-class</B></A>. The predefined <A REL=DEFINITION HREF="26_glo_t.htm#type"><I>type</I></A> specifiers that are required to have corresponding <A REL=DEFINITION HREF="26_glo_c.htm#class"><I>classes</I></A> are listed in <A REL=DEFINITION HREF="04_cg.htm#classtypecorrespondence">Figure 4-8</A>. It is <A REL=DEFINITION HREF="26_glo_i.htm#implementation-dependent"><I>implementation-dependent</I></A> whether each of these <A REL=DEFINITION HREF="26_glo_c.htm#class"><I>classes</I></A> is implemented as a <A REL=DEFINITION HREF="26_glo_b.htm#built-in_class"><I>built-in class</I></A>. <P><DD>
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<DT>* All <A REL=DEFINITION HREF="26_glo_c.htm#class"><I>classes</I></A> defined by means of <A REL=DEFINITION HREF="m_defstr.htm#defstruct"><B>defstruct</B></A> are <A REL=DEFINITION HREF="26_glo_i.htm#instance"><I>instances</I></A> of the <A REL=DEFINITION HREF="26_glo_c.htm#class"><I>class</I></A> <A REL=DEFINITION HREF="t_stu_cl.htm#structure-class"><B>structure-class</B></A>. <P><DD></DL><P>
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