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35 lines
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<!-- Common Lisp HyperSpec (TM), version 7.0 generated by Kent M. Pitman on Mon, 11-Apr-2005 2:31am EDT -->
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<TITLE>CLHS: Section 7.3</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="07_bc.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Previous]" SRC="../Graphics/Prev.gif" ALIGN=Bottom></A><A REL=UP HREF="07_.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Up]" SRC="../Graphics/Up.gif" ALIGN=Bottom></A><A REL=NEXT HREF="07_ca.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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7.3 Reinitializing an Instance</H2> <P>
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The generic function <A REL=DEFINITION HREF="f_reinit.htm#reinitialize-instance"><B>reinitialize-instance</B></A> may be used to change the values of <A REL=DEFINITION HREF="26_glo_s.htm#slot"><I>slots</I></A> according to initialization arguments. <P>
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The process of reinitialization changes the values of some <A REL=DEFINITION HREF="26_glo_s.htm#slot"><I>slots</I></A> and performs any user-defined actions. It does not modify the structure of an <A REL=DEFINITION HREF="26_glo_i.htm#instance"><I>instance</I></A> to add or delete <A REL=DEFINITION HREF="26_glo_s.htm#slot"><I>slots</I></A>, and it does not use any <TT>:initform</TT> forms to initialize <A REL=DEFINITION HREF="26_glo_s.htm#slot"><I>slots</I></A>. <P>
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The generic function <A REL=DEFINITION HREF="f_reinit.htm#reinitialize-instance"><B>reinitialize-instance</B></A> may be called directly. It takes one required argument, the <A REL=DEFINITION HREF="26_glo_i.htm#instance"><I>instance</I></A>. It also takes any number of initialization arguments to be used by <A REL=DEFINITION HREF="26_glo_m.htm#method"><I>methods</I></A> for <A REL=DEFINITION HREF="f_reinit.htm#reinitialize-instance"><B>reinitialize-instance</B></A> or for <A REL=DEFINITION HREF="f_shared.htm#shared-initialize"><B>shared-initialize</B></A>. The arguments after the required <A REL=DEFINITION HREF="26_glo_i.htm#instance"><I>instance</I></A> must form an <A REL=DEFINITION HREF="26_glo_i.htm#initialization_argument_list"><I>initialization argument list</I></A>. <P>
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There is a system-supplied primary <A REL=DEFINITION HREF="26_glo_m.htm#method"><I>method</I></A> for <A REL=DEFINITION HREF="f_reinit.htm#reinitialize-instance"><B>reinitialize-instance</B></A> whose <A REL=DEFINITION HREF="26_glo_p.htm#parameter_specializer"><I>parameter specializer</I></A> is the <A REL=DEFINITION HREF="26_glo_c.htm#class"><I>class</I></A> <A REL=DEFINITION HREF="t_std_ob.htm#standard-object"><B>standard-object</B></A>. First this <A REL=DEFINITION HREF="26_glo_m.htm#method"><I>method</I></A> checks the validity of initialization arguments and signals an error if an initialization argument is supplied that is not declared as valid. (For more information, see <A REL=CHILD HREF="07_ab.htm">Section 7.1.2 (Declaring the Validity of Initialization Arguments)</A>.) Then it calls the generic function <A REL=DEFINITION HREF="f_shared.htm#shared-initialize"><B>shared-initialize</B></A> with the following arguments: the <A REL=DEFINITION HREF="26_glo_i.htm#instance"><I>instance</I></A>, <A REL=DEFINITION HREF="a_nil.htm#nil"><B>nil</B></A>, and the initialization arguments it received. <P>
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<A REL=CHILD HREF="07_ca.htm"><H2>
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7.3.1 Customizing Reinitialization</H2></A><P><HR>
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<A REL=NAVIGATOR HREF="../Front/StartPts.htm"><IMG WIDTH=80 HEIGHT=40 ALT="[Starting Points]" SRC="../Graphics/StartPts.gif" ALIGN=Bottom></A><A REL=TOC HREF="../Front/Contents.htm"><IMG WIDTH=80 HEIGHT=40 ALT="[Contents]" SRC="../Graphics/Contents.gif" ALIGN=Bottom></A><A REL=INDEX HREF="../Front/X_Master.htm"><IMG WIDTH=80 HEIGHT=40 ALT="[Index]" SRC="../Graphics/Index.gif" ALIGN=Bottom></A><A REL=INDEX HREF="../Front/X_Symbol.htm"><IMG WIDTH=80 HEIGHT=40 ALT="[Symbols]" SRC="../Graphics/Symbols.gif" ALIGN=Bottom></A><A REL=GLOSSARY HREF="../Body/26_a.htm"><IMG WIDTH=80 HEIGHT=40 ALT="[Glossary]" SRC="../Graphics/Glossary.gif" ALIGN=Bottom></A><A HREF="../Front/X3J13Iss.htm"><IMG WIDTH=80 HEIGHT=40 ALT="[Issues]" SRC="../Graphics/Issues.gif" ALIGN=Bottom></A><BR>
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<A REL=COPYRIGHT HREF="../Front/Help.htm#Legal"><I>Copyright 1996-2005, LispWorks Ltd. All rights reserved.</I></A><P>
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