79 lines
5.3 KiB
HTML
79 lines
5.3 KiB
HTML
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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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<HTML>
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<HEAD>
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<TITLE>CLHS: Function LIST, LIST*</TITLE>
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<LINK HREF="../Data/clhs.css" REL="stylesheet" TYPE="text/css" />
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<META HTTP-EQUIV="Author" CONTENT="Kent M. Pitman">
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<META HTTP-EQUIV="Organization" CONTENT="LispWorks Ltd.">
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<LINK REL=TOP HREF="../Front/index.htm">
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<LINK REL=COPYRIGHT HREF="../Front/Help.htm#Legal">
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<LINK REL=PREV HREF="f_cp_lis.htm">
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<LINK REL=UP HREF="c_conses.htm">
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<LINK REL=NEXT HREF="f_list_l.htm">
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</HEAD>
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<BODY>
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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="f_cp_lis.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Previous]" SRC="../Graphics/Prev.gif" ALIGN=Bottom></A><A REL=UP HREF="c_conses.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Up]" SRC="../Graphics/Up.gif" ALIGN=Bottom></A><A REL=NEXT HREF="f_list_l.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Next]" SRC="../Graphics/Next.gif" ALIGN=Bottom></A></H1>
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<HR>
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<A NAME="list"><A NAME="listST"><I>Function</I> <B>LIST, LIST*</B></A></A> <P>
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<P><B>Syntax:</B><P>
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<P>
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<B>list</B> <I><TT>&rest</TT> objects</I> => <I>list</I><P>
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<B>list*</B> <I><TT>&rest</TT> objects+</I> => <I>result</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>object</I>---an <A REL=DEFINITION HREF="26_glo_o.htm#object"><I>object</I></A>. <P>
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<I>list</I>---a <A REL=DEFINITION HREF="26_glo_l.htm#list"><I>list</I></A>. <P>
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<I>result</I>---an <A REL=DEFINITION HREF="26_glo_o.htm#object"><I>object</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="#list"><B>list</B></A> returns a <A REL=DEFINITION HREF="26_glo_l.htm#list"><I>list</I></A> containing the supplied <I>objects</I>. <P>
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<A REL=DEFINITION HREF="#listST"><B>list*</B></A> is like <A REL=DEFINITION HREF="#list"><B>list</B></A> except that the last <A REL=DEFINITION HREF="26_glo_a.htm#argument"><I>argument</I></A> to <A REL=DEFINITION HREF="#list"><B>list</B></A> becomes the <A REL=DEFINITION HREF="26_glo_c.htm#car"><I>car</I></A> of the last <A REL=DEFINITION HREF="26_glo_c.htm#cons"><I>cons</I></A> constructed, while the last <A REL=DEFINITION HREF="26_glo_a.htm#argument"><I>argument</I></A> to <A REL=DEFINITION HREF="#listST"><B>list*</B></A> becomes the <A REL=DEFINITION HREF="26_glo_c.htm#cdr"><I>cdr</I></A> of the last <A REL=DEFINITION HREF="26_glo_c.htm#cons"><I>cons</I></A> constructed. Hence, any given call to <A REL=DEFINITION HREF="#listST"><B>list*</B></A> always produces one fewer <A REL=DEFINITION HREF="26_glo_c.htm#cons"><I>conses</I></A> than a call to <A REL=DEFINITION HREF="#list"><B>list</B></A> with the same number of arguments. <P>
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If the last <A REL=DEFINITION HREF="26_glo_a.htm#argument"><I>argument</I></A> to <A REL=DEFINITION HREF="#listST"><B>list*</B></A> is a <A REL=DEFINITION HREF="26_glo_l.htm#list"><I>list</I></A>, the effect is to construct a new <A REL=DEFINITION HREF="26_glo_l.htm#list"><I>list</I></A> which is similar, but which has additional elements added to the front corresponding to the preceding <A REL=DEFINITION HREF="26_glo_a.htm#argument"><I>arguments</I></A> of <A REL=DEFINITION HREF="#listST"><B>list*</B></A>. <P>
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If <A REL=DEFINITION HREF="#listST"><B>list*</B></A> receives only one <I>object</I>, that <I>object</I> is returned, regardless of whether or not it is a <A REL=DEFINITION HREF="26_glo_l.htm#list"><I>list</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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(list 1) => (1)
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(list* 1) => 1
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(setq a 1) => 1
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(list a 2) => (1 2)
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'(a 2) => (A 2)
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(list 'a 2) => (A 2)
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(list* a 2) => (1 . 2)
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(list) => NIL ;i.e., ()
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(setq a '(1 2)) => (1 2)
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(eq a (list* a)) => <A REL=DEFINITION HREF="26_glo_t.htm#true">true</A>
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(list 3 4 'a (car '(b . c)) (+ 6 -2)) => (3 4 A B 4)
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(list* 'a 'b 'c 'd) == (cons 'a (cons 'b (cons 'c 'd))) => (A B C . D)
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(list* 'a 'b 'c '(d e f)) => (A B C D E F)
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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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<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="f_cons.htm#cons"><B>cons</B></A> <P>
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<P><B>Notes:</B><P>
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<P>
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<PRE>
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(list* x) == x
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</PRE>
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</TT> <P>
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<HR>
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<A REL=NAVIGATOR HREF="../Front/StartPts.htm"><IMG WIDTH=80 HEIGHT=40 ALT="[Starting Points]" SRC="../Graphics/StartPts.gif" ALIGN=Bottom></A><A REL=TOC HREF="../Front/Contents.htm"><IMG WIDTH=80 HEIGHT=40 ALT="[Contents]" SRC="../Graphics/Contents.gif" ALIGN=Bottom></A><A REL=INDEX HREF="../Front/X_Master.htm"><IMG WIDTH=80 HEIGHT=40 ALT="[Index]" SRC="../Graphics/Index.gif" ALIGN=Bottom></A><A REL=INDEX HREF="../Front/X_Symbol.htm"><IMG WIDTH=80 HEIGHT=40 ALT="[Symbols]" SRC="../Graphics/Symbols.gif" ALIGN=Bottom></A><A REL=GLOSSARY HREF="../Body/26_a.htm"><IMG WIDTH=80 HEIGHT=40 ALT="[Glossary]" SRC="../Graphics/Glossary.gif" ALIGN=Bottom></A><A HREF="../Front/X3J13Iss.htm"><IMG WIDTH=80 HEIGHT=40 ALT="[Issues]" SRC="../Graphics/Issues.gif" ALIGN=Bottom></A><BR>
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<A REL=COPYRIGHT HREF="../Front/Help.htm#Legal"><I>Copyright 1996-2005, LispWorks Ltd. All rights reserved.</I></A><P>
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</BODY>
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</HTML>
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