62 lines
6.9 KiB
HTML
62 lines
6.9 KiB
HTML
<!-- 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: Function MAKE-LOAD-FORM-SAVING-SLOTS</TITLE>
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<A NAME="make-load-form-saving-slots"><I>Function</I> <B>MAKE-LOAD-FORM-SAVING-SLOTS</B></A> <P>
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<P>
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<P><B>Syntax:</B><P>
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<B>make-load-form-saving-slots</B> <I>object <TT>&key</TT> slot-names environment</I><P> => <I>creation-form, initialization-form</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>object</I>---an <A REL=DEFINITION HREF="26_glo_o.htm#object"><I>object</I></A>. <P>
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<I>slot-names</I>---a <A REL=DEFINITION HREF="26_glo_l.htm#list"><I>list</I></A>. <P>
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<I>environment</I>---an <A REL=DEFINITION HREF="26_glo_e.htm#environment_object"><I>environment object</I></A>. <P>
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<I>creation-form</I>---a <A REL=DEFINITION HREF="26_glo_f.htm#form"><I>form</I></A>. <P>
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<I>initialization-form</I>---a <A REL=DEFINITION HREF="26_glo_f.htm#form"><I>form</I></A>. <P>
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<P><B>Description:</B><P>
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<P>
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Returns <A REL=DEFINITION HREF="26_glo_f.htm#form"><I>forms</I></A> that, when <I>evaluated</I>, will construct an <A REL=DEFINITION HREF="26_glo_o.htm#object"><I>object</I></A> equivalent to <I>object</I>, without <I>executing</I> <A REL=DEFINITION HREF="26_glo_i.htm#initialization_form"><I>initialization forms</I></A>. The <A REL=DEFINITION HREF="26_glo_s.htm#slot"><I>slots</I></A> in the new <A REL=DEFINITION HREF="26_glo_o.htm#object"><I>object</I></A> that correspond to initialized <A REL=DEFINITION HREF="26_glo_s.htm#slot"><I>slots</I></A> in <I>object</I> are initialized using the values from <I>object</I>. Uninitialized <A REL=DEFINITION HREF="26_glo_s.htm#slot"><I>slots</I></A> in <I>object</I> are not initialized in the new <A REL=DEFINITION HREF="26_glo_o.htm#object"><I>object</I></A>. <A REL=DEFINITION HREF="#make-load-form-saving-slots"><B>make-load-form-saving-slots</B></A> works for any <A REL=DEFINITION HREF="26_glo_i.htm#instance"><I>instance</I></A> of <A REL=DEFINITION HREF="t_std_ob.htm#standard-object"><B>standard-object</B></A> or <A REL=DEFINITION HREF="t_stu_ob.htm#structure-object"><B>structure-object</B></A>. <P>
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<I>Slot-names</I> is a <A REL=DEFINITION HREF="26_glo_l.htm#list"><I>list</I></A> of the names of the <A REL=DEFINITION HREF="26_glo_s.htm#slot"><I>slots</I></A> to preserve. If <I>slot-names</I> is not supplied, its value is all of the <A REL=DEFINITION HREF="26_glo_l.htm#local_slot"><I>local slots</I></A>. <P>
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<A REL=DEFINITION HREF="#make-load-form-saving-slots"><B>make-load-form-saving-slots</B></A> returns two values, thus it can deal with circular structures. Whether the result is useful in an application depends on whether the <I>object</I>'s <A REL=DEFINITION HREF="26_glo_t.htm#type"><I>type</I></A> and slot contents fully capture the application's idea of the <I>object</I>'s state. <P>
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<I>Environment</I> is the environment in which the forms will be processed. <P>
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<P><B>Examples:</B> None.
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<P>
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<P><B>Side Effects:</B> None.
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<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> None.
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<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_mk_ld_.htm#make-load-form"><B>make-load-form</B></A>, <A REL=DEFINITION HREF="f_mk_ins.htm#make-instance"><B>make-instance</B></A>, <A REL=DEFINITION HREF="m_setf_.htm#setf"><B>setf</B></A>, <A REL=DEFINITION HREF="f_slt_va.htm#slot-value"><B>slot-value</B></A>, <A REL=DEFINITION HREF="f_slt_ma.htm#slot-makunbound"><B>slot-makunbound</B></A> <P>
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<P><B>Notes:</B><P>
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<P>
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<A REL=DEFINITION HREF="#make-load-form-saving-slots"><B>make-load-form-saving-slots</B></A> can be useful in user-written <A REL=DEFINITION HREF="f_mk_ld_.htm#make-load-form"><B>make-load-form</B></A> methods. <P>
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<P>
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When the <A REL=DEFINITION HREF="26_glo_o.htm#object"><I>object</I></A> is an <A REL=DEFINITION HREF="26_glo_i.htm#instance"><I>instance</I></A> of <A REL=DEFINITION HREF="t_std_ob.htm#standard-object"><B>standard-object</B></A>, <A REL=DEFINITION HREF="#make-load-form-saving-slots"><B>make-load-form-saving-slots</B></A> could return a creation form that <A REL=DEFINITION HREF="26_glo_c.htm#call"><I>calls</I></A> <A REL=DEFINITION HREF="f_alloca.htm#allocate-instance"><B>allocate-instance</B></A> and an initialization form that contains <A REL=DEFINITION HREF="26_glo_c.htm#call"><I>calls</I></A> to <A REL=DEFINITION HREF="m_setf_.htm#setf"><B>setf</B></A> of <A REL=DEFINITION HREF="f_slt_va.htm#slot-value"><B>slot-value</B></A> and <A REL=DEFINITION HREF="f_slt_ma.htm#slot-makunbound"><B>slot-makunbound</B></A>, though other <A REL=DEFINITION HREF="26_glo_f.htm#function"><I>functions</I></A> of similar effect might actually be used. <P>
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<P><HR>The following <A REL=META HREF="../Front/X3J13Iss.htm">X3J13 cleanup issues</A>, <I>not part of the specification</I>, apply to this section:<P><UL><LI> <A REL=CHILD HREF="../Issues/iss237.htm">MAKE-LOAD-FORM-SAVING-SLOTS:NO-INITFORMS</A><LI> <A REL=CHILD HREF="../Issues/iss215.htm">LOAD-OBJECTS:MAKE-LOAD-FORM</A><LI> <A REL=CHILD HREF="../Issues/iss236.htm">MAKE-LOAD-FORM-CONFUSION:REWRITE</A><P></UL><HR>
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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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