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3.1 KiB
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51 lines
3.1 KiB
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<!DOCTYPE HTML PUBLIC "-//W3O//DTD W3 HTML 2.0//EN">
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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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<TITLE>28.1.6.3. Agreement on Parameter Specializers and Qualifiers</TITLE>
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<b>Common Lisp the Language, 2nd Edition</b>
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<BR> <HR><A NAME=tex2html5159 HREF="node281.html"><IMG ALIGN=BOTTOM ALT="next" SRC="icons/next_motif.gif"></A> <A NAME=tex2html5157 HREF="node277.html"><IMG ALIGN=BOTTOM ALT="up" SRC="icons/up_motif.gif"></A> <A NAME=tex2html5151 HREF="node279.html"><IMG ALIGN=BOTTOM ALT="previous" SRC="icons/previous_motif.gif"></A> <A NAME=tex2html5161 HREF="node1.html"><IMG ALIGN=BOTTOM ALT="contents" SRC="icons/contents_motif.gif"></A> <A NAME=tex2html5162 HREF="index.html"><IMG ALIGN=BOTTOM ALT="index" SRC="icons/index_motif.gif"></A> <BR>
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<B> Next:</B> <A NAME=tex2html5160 HREF="node281.html"> Congruent Lambda-Lists for </A>
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<B>Up:</B> <A NAME=tex2html5158 HREF="node277.html"> Generic Functions and </A>
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<B> Previous:</B> <A NAME=tex2html5152 HREF="node279.html"> Introduction to Methods</A>
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<HR> <P>
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<H3><A NAME=SECTION003216300000000000000>28.1.6.3. Agreement on Parameter Specializers and Qualifiers</A></H3>
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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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<A NAME=AgreementonParameterSpecializersandQualifiersSECTION>Two</A>
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methods are said to agree with each other on parameter specializers
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and qualifiers if the following conditions hold:
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<P>
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<UL><LI> Both methods have the same number of required parameters.
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Suppose the parameter specializers of the two methods are
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<IMG ALIGN=BOTTOM ALT="" SRC="_24769_tex2html_wrap43545.gif">
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and <IMG ALIGN=BOTTOM ALT="" SRC="_24769_tex2html_wrap43547.gif">.
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<P>
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<LI> For each 1 <= <i>i</i> <= <i>n</i>,
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<IMG ALIGN=BOTTOM ALT="" SRC="_24769_tex2html_wrap43551.gif"> agrees with <IMG ALIGN=BOTTOM ALT="" SRC="_24769_tex2html_wrap43553.gif">.
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The parameter specializer <IMG ALIGN=BOTTOM ALT="" SRC="_24769_tex2html_wrap43551.gif">
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agrees with <IMG ALIGN=BOTTOM ALT="" SRC="_24769_tex2html_wrap43553.gif"> if
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<IMG ALIGN=BOTTOM ALT="" SRC="_24769_tex2html_wrap43551.gif"> and <IMG ALIGN=BOTTOM ALT="" SRC="_24769_tex2html_wrap43553.gif"> are the same class or if
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<IMG ALIGN=BOTTOM ALT="" SRC="_24769_tex2html_wrap43563.gif">,
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<IMG ALIGN=BOTTOM ALT="" SRC="_24769_tex2html_wrap43565.gif">, and
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<tt>(<tt>eql</tt> <IMG ALIGN=BOTTOM ALT="" SRC="_24769_tex2html_wrap43567.gif"> <IMG ALIGN=BOTTOM ALT="" SRC="_24769_tex2html_wrap43569.gif">)</tt>.
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Otherwise <IMG ALIGN=BOTTOM ALT="" SRC="_24769_tex2html_wrap43551.gif"> and <IMG ALIGN=BOTTOM ALT="" SRC="_24769_tex2html_wrap43553.gif"> do not agree.
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<P>
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<LI> The lists of qualifiers of both methods contain the same
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non-<tt>nil</tt> atoms in the same order. That is, the lists are <tt>equal</tt>.
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<P>
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</UL>
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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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</BODY>
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