76 lines
6.4 KiB
HTML
76 lines
6.4 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 CHAR-NAME</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="v_char_c.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Previous]" SRC="../Graphics/Prev.gif" ALIGN=Bottom></A><A REL=UP HREF="c_charac.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Up]" SRC="../Graphics/Up.gif" ALIGN=Bottom></A><A REL=NEXT HREF="f_name_c.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Next]" SRC="../Graphics/Next.gif" ALIGN=Bottom></A></H1>
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<A NAME="char-name"><I>Function</I> <B>CHAR-NAME</B></A> <P>
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<P><B>Syntax:</B><P>
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<P>
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<B>char-name</B> <I>character</I> => <I>name</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>character</I>---a <A REL=DEFINITION HREF="26_glo_c.htm#character"><I>character</I></A>. <P>
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<I>name</I>---a <A REL=DEFINITION HREF="26_glo_s.htm#string"><I>string</I></A> or <A REL=DEFINITION HREF="a_nil.htm#nil"><B>nil</B></A>. <P>
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<P><B>Description:</B><P>
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<P>
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Returns a <A REL=DEFINITION HREF="26_glo_s.htm#string"><I>string</I></A> that is the <A REL=DEFINITION HREF="26_glo_n.htm#name"><I>name</I></A> of the <I>character</I>, or <A REL=DEFINITION HREF="a_nil.htm#nil"><B>nil</B></A> if the <I>character</I> has no <A REL=DEFINITION HREF="26_glo_n.htm#name"><I>name</I></A>. <P>
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All <A REL=DEFINITION HREF="26_glo_n.htm#non-graphic"><I>non-graphic</I></A> characters are required to have <A REL=DEFINITION HREF="26_glo_n.htm#name"><I>names</I></A> unless they have some <A REL=DEFINITION HREF="26_glo_i.htm#implementation-defined"><I>implementation-defined</I></A> <A REL=DEFINITION HREF="26_glo_a.htm#attribute"><I>attribute</I></A> which is not <A REL=DEFINITION HREF="26_glo_n.htm#null"><I>null</I></A>. Whether or not other <A REL=DEFINITION HREF="26_glo_c.htm#character"><I>characters</I></A> have <A REL=DEFINITION HREF="26_glo_n.htm#name"><I>names</I></A> is <A REL=DEFINITION HREF="26_glo_i.htm#implementation-dependent"><I>implementation-dependent</I></A>. <P>
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The <A REL=DEFINITION HREF="26_glo_s.htm#standard_character"><I>standard characters</I></A> <Newline> and <Space> have the respective names <TT>"Newline"</TT> and <TT>"Space"</TT>. The <A REL=DEFINITION HREF="26_glo_s.htm#semi-standard"><I>semi-standard</I></A> <A REL=DEFINITION HREF="26_glo_c.htm#character"><I>characters</I></A> <Tab>, <Page>, <Rubout>, <Linefeed>, <Return>, and <Backspace> (if they are supported by the <A REL=DEFINITION HREF="26_glo_i.htm#implementation"><I>implementation</I></A>) have the respective names <TT>"Tab"</TT>, <TT>"Page"</TT>, <TT>"Rubout"</TT>, <TT>"Linefeed"</TT>, <TT>"Return"</TT>, and <TT>"Backspace"</TT> (in the indicated case, even though name lookup by ``<TT>#\</TT>'' and by the <A REL=DEFINITION HREF="26_glo_f.htm#function"><I>function</I></A> <A REL=DEFINITION HREF="f_name_c.htm#name-char"><B>name-char</B></A> is not case sensitive). <P>
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<P><B>Examples:</B><P>
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<P>
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<PRE>
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(char-name #\ ) => "Space"
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(char-name #\Space) => "Space"
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(char-name #\Page) => "Page"
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(char-name #\a)
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=> NIL
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OR=> "LOWERCASE-a"
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OR=> "Small-A"
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OR=> "LA01"
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(char-name #\A)
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=> NIL
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OR=> "UPPERCASE-A"
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OR=> "Capital-A"
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OR=> "LA02"
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;; Even though its CHAR-NAME can vary, #\A prints as #\A
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(prin1-to-string (read-from-string (format nil "#\\~A" (or (char-name #\A) "A"))))
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=> "#\\A"
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</PRE>
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</TT> <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>character</I> is not a <A REL=DEFINITION HREF="26_glo_c.htm#character"><I>character</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_name_c.htm#name-char"><B>name-char</B></A>, <A REL=CHILD HREF="22_acb.htm">Section 22.1.3.2 (Printing Characters)</A> <P>
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<P><B>Notes:</B><P>
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<P>
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<A REL=DEFINITION HREF="26_glo_n.htm#non-graphic"><I>Non-graphic</I></A> <A REL=DEFINITION HREF="26_glo_c.htm#character"><I>characters</I></A> having <A REL=DEFINITION HREF="26_glo_n.htm#name"><I>names</I></A> are written by the <A REL=DEFINITION HREF="26_glo_l.htm#lisp_printer"><I>Lisp printer</I></A> as ``<TT>#\</TT>'' followed by the their <A REL=DEFINITION HREF="26_glo_n.htm#name"><I>name</I></A>; see <A REL=CHILD HREF="22_acb.htm">Section 22.1.3.2 (Printing Characters)</A>. <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/iss024.htm">CHAR-NAME-CASE:X3J13-MAR-91</A><P></UL><HR>
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