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61 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: Standard Generic Function REINITIALIZE-INSTANCE</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="f_alloca.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Previous]" SRC="../Graphics/Prev.gif" ALIGN=Bottom></A><A REL=UP HREF="c_object.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Up]" SRC="../Graphics/Up.gif" ALIGN=Bottom></A><A REL=NEXT HREF="f_shared.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Next]" SRC="../Graphics/Next.gif" ALIGN=Bottom></A></H1>
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<A NAME="reinitialize-instance"><I>Standard Generic Function</I> <B>REINITIALIZE-INSTANCE</B></A> <P>
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<P><B>Syntax:</B><P>
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<P>
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<B>reinitialize-instance</B> <I>instance <TT>&rest</TT> initargs <TT>&key</TT> <TT>&allow-other-keys</TT></I> => <I>instance</I><P>
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<P>
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<P><B>Method Signatures:</B><P>
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<P>
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<B>reinitialize-instance</B> <I>(<I>instance</I><B> <A REL=DEFINITION HREF="t_std_ob.htm#standard-object">standard-object</A></B>) <TT>&rest</TT> initargs</I><P>
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<P>
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<P><B>Arguments and Values:</B><P>
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<P>
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<I>instance</I>---an <A REL=DEFINITION HREF="26_glo_o.htm#object"><I>object</I></A>. <P>
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<I>initargs</I>---an <A REL=DEFINITION HREF="26_glo_i.htm#initialization_argument_list"><I>initialization argument list</I></A>. <P>
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<P><B>Description:</B><P>
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<P>
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The <A REL=DEFINITION HREF="26_glo_g.htm#generic_function"><I>generic function</I></A> <A REL=DEFINITION HREF="#reinitialize-instance"><B>reinitialize-instance</B></A> can be used to change the values of <A REL=DEFINITION HREF="26_glo_l.htm#local_slot"><I>local slots</I></A> of an <I>instance</I> according to <I>initargs</I>. This <A REL=DEFINITION HREF="26_glo_g.htm#generic_function"><I>generic function</I></A> can be called by users. <P>
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The system-supplied primary <A REL=DEFINITION HREF="26_glo_m.htm#method"><I>method</I></A> for <A REL=DEFINITION HREF="#reinitialize-instance"><B>reinitialize-instance</B></A> checks the validity of <I>initargs</I> and signals an error if an <I>initarg</I> is supplied that is not declared as valid. The <A REL=DEFINITION HREF="26_glo_m.htm#method"><I>method</I></A> then calls the generic function <A REL=DEFINITION HREF="f_shared.htm#shared-initialize"><B>shared-initialize</B></A> with the following arguments: the <I>instance</I>, <A REL=DEFINITION HREF="a_nil.htm#nil"><B>nil</B></A> (which means no <A REL=DEFINITION HREF="26_glo_s.htm#slot"><I>slots</I></A> should be initialized according to their initforms), and the <I>initargs</I> it received. <P>
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<P><B>Examples:</B> None.
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<P>
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<P><B>Side Effects:</B><P>
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<P>
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The <A REL=DEFINITION HREF="26_glo_g.htm#generic_function"><I>generic function</I></A> <A REL=DEFINITION HREF="#reinitialize-instance"><B>reinitialize-instance</B></A> changes the values of <A REL=DEFINITION HREF="26_glo_l.htm#local_slot"><I>local slots</I></A>. <P>
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<P><B>Affected By:</B> None.
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<P>
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<P><B>Exceptional Situations:</B><P>
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<P>
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The system-supplied primary <A REL=DEFINITION HREF="26_glo_m.htm#method"><I>method</I></A> for <A REL=DEFINITION HREF="#reinitialize-instance"><B>reinitialize-instance</B></A> signals an error if an <I>initarg</I> is supplied that is not declared as valid. <P>
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<P><B>See Also:</B><P>
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<P>
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<A REL=DEFINITION HREF="f_init_i.htm#initialize-instance"><B>initialize-instance</B></A>, <A REL=DEFINITION HREF="f_shared.htm#shared-initialize"><B>shared-initialize</B></A>, <A REL=DEFINITION HREF="f_upda_1.htm#update-instance-for-redefined-class"><B>update-instance-for-redefined-class</B></A>, <A REL=DEFINITION HREF="f_update.htm#update-instance-for-different-class"><B>update-instance-for-different-class</B></A>, <A REL=DEFINITION HREF="f_slt_bo.htm#slot-boundp"><B>slot-boundp</B></A>, <A REL=DEFINITION HREF="f_slt_ma.htm#slot-makunbound"><B>slot-makunbound</B></A>, <A REL=CHILD HREF="07_c.htm">Section 7.3 (Reinitializing an Instance)</A>, <A REL=CHILD HREF="07_ad.htm">Section 7.1.4 (Rules for Initialization Arguments)</A>, <A REL=CHILD HREF="07_ab.htm">Section 7.1.2 (Declaring the Validity of Initialization Arguments)</A> <P>
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<P><B>Notes:</B><P>
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<P>
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<I>Initargs</I> are declared as valid by using the <TT>:initarg</TT> option to <A REL=DEFINITION HREF="m_defcla.htm#defclass"><B>defclass</B></A>, or by defining <A REL=DEFINITION HREF="26_glo_m.htm#method"><I>methods</I></A> for <A REL=DEFINITION HREF="#reinitialize-instance"><B>reinitialize-instance</B></A> or <A REL=DEFINITION HREF="f_shared.htm#shared-initialize"><B>shared-initialize</B></A>. The keyword name of each keyword parameter specifier in the <A REL=DEFINITION HREF="26_glo_l.htm#lambda_list"><I>lambda list</I></A> of any <A REL=DEFINITION HREF="26_glo_m.htm#method"><I>method</I></A> defined on <A REL=DEFINITION HREF="#reinitialize-instance"><B>reinitialize-instance</B></A> or <A REL=DEFINITION HREF="f_shared.htm#shared-initialize"><B>shared-initialize</B></A> is declared as a valid initialization argument name for all <A REL=DEFINITION HREF="26_glo_c.htm#class"><I>classes</I></A> for which that <A REL=DEFINITION HREF="26_glo_m.htm#method"><I>method</I></A> is applicable. <P>
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<P><HR>The following <A REL=META HREF="../Front/X3J13Iss.htm">X3J13 cleanup issue</A>, <I>not part of the specification</I>, applies to this section:<P><UL><LI> <A REL=CHILD HREF="../Issues/iss197.htm">INITIALIZATION-FUNCTION-KEYWORD-CHECKING</A><P></UL><HR>
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