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30 lines
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<TITLE>CLHS: Section 4.3.4.2</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_cda.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Previous]" SRC="../Graphics/Prev.gif" ALIGN=Bottom></A><A REL=UP HREF="04_cd.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Up]" SRC="../Graphics/Up.gif" ALIGN=Bottom></A><A REL=NEXT HREF="04_ce.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Next]" SRC="../Graphics/Next.gif" ALIGN=Bottom></A></H1>
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4.3.4.2 Inheritance of Class Options</H2> <P>
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The <TT>:default-initargs</TT> class option is inherited. The set of defaulted initialization arguments for a <A REL=DEFINITION HREF="26_glo_c.htm#class"><I>class</I></A> is the union of the sets of initialization arguments supplied in the <TT>:default-initargs</TT> class options of the <A REL=DEFINITION HREF="26_glo_c.htm#class"><I>class</I></A> and its <A REL=DEFINITION HREF="26_glo_s.htm#superclass"><I>superclasses</I></A>. When more than one default initial value <A REL=DEFINITION HREF="26_glo_f.htm#form"><I>form</I></A> is supplied for a given initialization argument, the default initial value <A REL=DEFINITION HREF="26_glo_f.htm#form"><I>form</I></A> that is used is the one supplied by the <A REL=DEFINITION HREF="26_glo_c.htm#class"><I>class</I></A> that is most specific according to the <A REL=DEFINITION HREF="26_glo_c.htm#class_precedence_list"><I>class precedence list</I></A>. <P>
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If a given <TT>:default-initargs</TT> class option specifies an initialization argument of the same <A REL=DEFINITION HREF="26_glo_n.htm#name"><I>name</I></A> more than once, an error of <A REL=DEFINITION HREF="26_glo_t.htm#type"><I>type</I></A> <A REL=DEFINITION HREF="e_progra.htm#program-error"><B>program-error</B></A> is signaled. <P>
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