62 lines
5.2 KiB
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62 lines
5.2 KiB
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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: Function MAKE-DISPATCH-MACRO-CHARACTER</TITLE>
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<A NAME="make-dispatch-macro-character"><I>Function</I> <B>MAKE-DISPATCH-MACRO-CHARACTER</B></A> <P>
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<P><B>Syntax:</B><P>
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<P>
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<B>make-dispatch-macro-character</B> <I>char <TT>&optional</TT> non-terminating-p readtable</I> => <I><A REL=DEFINITION HREF="a_t.htm#t"><B>t</B></A></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>char</I>---a <A REL=DEFINITION HREF="26_glo_c.htm#character"><I>character</I></A>. <P>
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<I>non-terminating-p</I>---a <A REL=DEFINITION HREF="26_glo_g.htm#generalized_boolean"><I>generalized boolean</I></A>. The default is <A REL=DEFINITION HREF="26_glo_f.htm#false"><I>false</I></A>. <P>
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<I>readtable</I>---a <A REL=DEFINITION HREF="26_glo_r.htm#readtable"><I>readtable</I></A>. The default is the <A REL=DEFINITION HREF="26_glo_c.htm#current_readtable"><I>current readtable</I></A>. <P>
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<P><B>Description:</B><P>
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<P>
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<A REL=DEFINITION HREF="#make-dispatch-macro-character"><B>make-dispatch-macro-character</B></A> makes <I>char</I> be a <A REL=DEFINITION HREF="26_glo_d.htm#dispatching_macro_character"><I>dispatching macro character</I></A> in <I>readtable</I>. <P>
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Initially, every <A REL=DEFINITION HREF="26_glo_c.htm#character"><I>character</I></A> in the dispatch table associated with the <I>char</I> has an associated function that signals an error of <A REL=DEFINITION HREF="26_glo_t.htm#type"><I>type</I></A> <A REL=DEFINITION HREF="e_rder_e.htm#reader-error"><B>reader-error</B></A>. <P>
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If <I>non-terminating-p</I> is <A REL=DEFINITION HREF="26_glo_t.htm#true"><I>true</I></A>, the <A REL=DEFINITION HREF="26_glo_d.htm#dispatching_macro_character"><I>dispatching macro character</I></A> is made a <A REL=DEFINITION HREF="26_glo_n.htm#non-terminating"><I>non-terminating</I></A> <A REL=DEFINITION HREF="26_glo_m.htm#macro_character"><I>macro character</I></A>; if <I>non-terminating-p</I> is <A REL=DEFINITION HREF="26_glo_f.htm#false"><I>false</I></A>, the <A REL=DEFINITION HREF="26_glo_d.htm#dispatching_macro_character"><I>dispatching macro character</I></A> is made a <A REL=DEFINITION HREF="26_glo_t.htm#terminating"><I>terminating</I></A> <A REL=DEFINITION HREF="26_glo_m.htm#macro_character"><I>macro character</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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(get-macro-character #\{) => NIL, <A REL=DEFINITION HREF="26_glo_f.htm#false">false</A>
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(make-dispatch-macro-character #\{) => T
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(not (get-macro-character #\{)) => <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> None.
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<P>
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The <I>readtable</I> is altered. <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="v_rdtabl.htm#STreadtableST"><B>*readtable*</B></A>, <A REL=DEFINITION HREF="f_set__1.htm#set-dispatch-macro-character"><B>set-dispatch-macro-character</B></A> <P>
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<P><B>Notes:</B> None.
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<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/iss013.htm">ARGUMENTS-UNDERSPECIFIED:SPECIFY</A><P></UL><HR>
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