51 lines
2.6 KiB
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51 lines
2.6 KiB
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<!Converted with LaTeX2HTML 0.6.5 (Tue Nov 15 1994) by Nikos Drakos (nikos@cbl.leeds.ac.uk), CBLU, University of Leeds >
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<HEAD>
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<TITLE>10.2. The Print Name</TITLE>
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<meta name="description" value=" The Print Name">
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<P>
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<b>Common Lisp the Language, 2nd Edition</b>
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<BR> <HR><A NAME=tex2html2880 HREF="node110.html"><IMG ALIGN=BOTTOM ALT="next" SRC="icons/next_motif.gif"></A> <A NAME=tex2html2878 HREF="node107.html"><IMG ALIGN=BOTTOM ALT="up" SRC="icons/up_motif.gif"></A> <A NAME=tex2html2872 HREF="node108.html"><IMG ALIGN=BOTTOM ALT="previous" SRC="icons/previous_motif.gif"></A> <A NAME=tex2html2882 HREF="node1.html"><IMG ALIGN=BOTTOM ALT="contents" SRC="icons/contents_motif.gif"></A> <A NAME=tex2html2883 HREF="index.html"><IMG ALIGN=BOTTOM ALT="index" SRC="icons/index_motif.gif"></A> <BR>
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<B> Next:</B> <A NAME=tex2html2881 HREF="node110.html"> Creating Symbols</A>
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<B>Up:</B> <A NAME=tex2html2879 HREF="node107.html"> Symbols</A>
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<B> Previous:</B> <A NAME=tex2html2873 HREF="node108.html"> The Property List</A>
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<HR> <P>
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<H1><A NAME=SECTION001420000000000000000>10.2. The Print Name</A></H1>
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<P>
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Every symbol has an associated string called the <i>print name</i>.
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This string is used as the external representation of the symbol:
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if the characters in the string are typed in to <tt>read</tt>
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(with suitable escape conventions for certain characters),
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it is interpreted as a reference to that symbol
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(if it is interned); and if the symbol is printed, <tt>print</tt> types out the
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print name.
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For more information, see the sections on the <i>reader</i>
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(section <A HREF="node188.html#READER">22.1.1</A>)
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and <i>printer</i> (section <A HREF="node193.html#PRINTER">22.1.6</A>).
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<P>
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<BR><b>[Function]</b><BR>
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<tt>symbol-name <i>sym</i></tt><P>This returns the print name of the symbol <i>sym</i>.
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For example:
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<P><pre>
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(symbol-name 'xyz) => "XYZ"
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</pre><P>
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It is an extremely bad idea to modify a string being used as the print name of
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a symbol. Such a modification may tremendously confuse
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the function <tt>read</tt> and the package system.
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<P>
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<img align=bottom alt="change_begin" src="gif/change_begin.gif"><br>
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X3J13 voted in March 1989 (CHARACTER-PROPOSAL) <A NAME=10013> </A>
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to specify that it is an error to modify a string being used
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as the print name of a symbol.
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<br><img align=bottom alt="change_end" src="gif/change_end.gif">
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<P>
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<HR>
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<P><ADDRESS>
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AI.Repository@cs.cmu.edu
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</ADDRESS>
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