61 lines
3.5 KiB
HTML
61 lines
3.5 KiB
HTML
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<TITLE>CLHS: Function MAKUNBOUND</TITLE>
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<A NAME="makunbound"><I>Function</I> <B>MAKUNBOUND</B></A> <P>
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<P><B>Syntax:</B><P>
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<P>
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<B>makunbound</B> <I>symbol</I> => <I>symbol</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>symbol</I>---a <A REL=DEFINITION HREF="26_glo_s.htm#symbol"><I>symbol</I></A> <P>
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<P><B>Description:</B><P>
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<P>
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Makes the <I>symbol</I> be <A REL=DEFINITION HREF="26_glo_u.htm#unbound"><I>unbound</I></A>, regardless of whether it was previously <A REL=DEFINITION HREF="26_glo_b.htm#bound"><I>bound</I></A>. <P>
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<P><B>Examples:</B><P>
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<P>
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<PRE>
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(setf (symbol-value 'a) 1)
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(boundp 'a) => <A REL=DEFINITION HREF="26_glo_t.htm#true">true</A>
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a => 1
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(makunbound 'a) => A
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(boundp 'a) => <A REL=DEFINITION HREF="26_glo_f.htm#false">false</A>
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</PRE>
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</TT> <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_v.htm#value_cell"><I>value cell</I></A> of <I>symbol</I> is modified. <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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Should signal an error of <A REL=DEFINITION HREF="26_glo_t.htm#type"><I>type</I></A> <A REL=DEFINITION HREF="e_tp_err.htm#type-error"><B>type-error</B></A> if <I>symbol</I> is not a <A REL=DEFINITION HREF="26_glo_s.htm#symbol"><I>symbol</I></A>. <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_boundp.htm#boundp"><B>boundp</B></A>, <A REL=DEFINITION HREF="f_fmakun.htm#fmakunbound"><B>fmakunbound</B></A> <P>
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<P><B>Notes:</B> None.
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