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Add hyperspec
2024-04-01 10:24:07 +02:00
<!-- Common Lisp HyperSpec (TM), version 7.0 generated by Kent M. Pitman on Mon, 11-Apr-2005 2:31am EDT -->
<HTML>
<HEAD>
<TITLE>CLHS: System Class LIST</TITLE>
<LINK HREF="../Data/clhs.css" REL="stylesheet" TYPE="text/css" />
<META HTTP-EQUIV="Author" CONTENT="Kent M. Pitman">
<META HTTP-EQUIV="Organization" CONTENT="LispWorks Ltd.">
<LINK REL=TOP HREF="../Front/index.htm">
<LINK REL=COPYRIGHT HREF="../Front/Help.htm#Legal">
<LINK REL=DISCLAIMER HREF="../Front/Help.htm#Disclaimer">
<LINK REL=PREV HREF="c_conses.htm">
<LINK REL=UP HREF="c_conses.htm">
<LINK REL=NEXT HREF="t_null.htm">
</HEAD>
<BODY>
<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="c_conses.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="t_null.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Next]" SRC="../Graphics/Next.gif" ALIGN=Bottom></A></H1>
<HR>
<A NAME="list"><I>System Class</I> <B>LIST</B></A> <P>
<P><B>Class Precedence List:</B><P>
<P>
<A REL=DEFINITION HREF="#list"><B>list</B></A>, <A REL=DEFINITION HREF="t_seq.htm#sequence"><B>sequence</B></A>, <A REL=DEFINITION HREF="t_t.htm#t"><B>t</B></A> <P>
<P><B>Description:</B><P>
<P>
A <A REL=DEFINITION HREF="26_glo_l.htm#list"><I>list</I></A> is a chain of <A REL=DEFINITION HREF="26_glo_c.htm#cons"><I>conses</I></A> in which the <A REL=DEFINITION HREF="26_glo_c.htm#car"><I>car</I></A> of each <A REL=DEFINITION HREF="26_glo_c.htm#cons"><I>cons</I></A> is an <A REL=DEFINITION HREF="26_glo_e.htm#element"><I>element</I></A> of the <A REL=DEFINITION HREF="26_glo_l.htm#list"><I>list</I></A>, and the <A REL=DEFINITION HREF="26_glo_c.htm#cdr"><I>cdr</I></A> of each <A REL=DEFINITION HREF="26_glo_c.htm#cons"><I>cons</I></A> is either the next link in the chain or a terminating <A REL=DEFINITION HREF="26_glo_a.htm#atom"><I>atom</I></A>. <P>
A <A REL=DEFINITION HREF="26_glo_p.htm#proper_list"><I>proper list</I></A> is a chain of <A REL=DEFINITION HREF="26_glo_c.htm#cons"><I>conses</I></A> terminated by the <A REL=DEFINITION HREF="26_glo_e.htm#empty_list"><I>empty list</I></A>, <TT>()</TT>, which is itself a <A REL=DEFINITION HREF="26_glo_p.htm#proper_list"><I>proper list</I></A>. A <A REL=DEFINITION HREF="26_glo_d.htm#dotted_list"><I>dotted list</I></A> is a <A REL=DEFINITION HREF="26_glo_l.htm#list"><I>list</I></A> which has a terminating <A REL=DEFINITION HREF="26_glo_a.htm#atom"><I>atom</I></A> that is not the <A REL=DEFINITION HREF="26_glo_e.htm#empty_list"><I>empty list</I></A>. A <A REL=DEFINITION HREF="26_glo_c.htm#circular_list"><I>circular list</I></A> is a chain of <A REL=DEFINITION HREF="26_glo_c.htm#cons"><I>conses</I></A> that has no termination because some <A REL=DEFINITION HREF="26_glo_c.htm#cons"><I>cons</I></A> in the chain is the <A REL=DEFINITION HREF="26_glo_c.htm#cdr"><I>cdr</I></A> of a later <A REL=DEFINITION HREF="26_glo_c.htm#cons"><I>cons</I></A>. <P>
<A REL=DEFINITION HREF="26_glo_d.htm#dotted_list"><I>Dotted lists</I></A> and <A REL=DEFINITION HREF="26_glo_c.htm#circular_list"><I>circular lists</I></A> are also <A REL=DEFINITION HREF="26_glo_l.htm#list"><I>lists</I></A>, but usually the unqualified term ``list'' within this specification means <A REL=DEFINITION HREF="26_glo_p.htm#proper_list"><I>proper list</I></A>. Nevertheless, the <A REL=DEFINITION HREF="26_glo_t.htm#type"><I>type</I></A> <A REL=DEFINITION HREF="#list"><B>list</B></A> unambiguously includes <A REL=DEFINITION HREF="26_glo_d.htm#dotted_list"><I>dotted lists</I></A> and <A REL=DEFINITION HREF="26_glo_c.htm#circular_list"><I>circular lists</I></A>. <P>
For each <A REL=DEFINITION HREF="26_glo_e.htm#element"><I>element</I></A> of a <A REL=DEFINITION HREF="26_glo_l.htm#list"><I>list</I></A> there is a <A REL=DEFINITION HREF="26_glo_c.htm#cons"><I>cons</I></A>. The <A REL=DEFINITION HREF="26_glo_e.htm#empty_list"><I>empty list</I></A> has no <A REL=DEFINITION HREF="26_glo_e.htm#element"><I>elements</I></A> and is not a <A REL=DEFINITION HREF="26_glo_c.htm#cons"><I>cons</I></A>. <P>
The <A REL=DEFINITION HREF="26_glo_t.htm#type"><I>types</I></A> <A REL=DEFINITION HREF="t_cons.htm#cons"><B>cons</B></A> and <A REL=DEFINITION HREF="t_null.htm#null"><B>null</B></A> form an <A REL=DEFINITION HREF="26_glo_e.htm#exhaustive_partition"><I>exhaustive partition</I></A> of the <A REL=DEFINITION HREF="26_glo_t.htm#type"><I>type</I></A> <A REL=DEFINITION HREF="#list"><B>list</B></A>. <P>
<P><B>See Also:</B><P>
<P>
<A REL=CHILD HREF="02_da.htm">Section 2.4.1 (Left-Parenthesis)</A>, <A REL=CHILD HREF="22_ace.htm">Section 22.1.3.5 (Printing Lists and Conses)</A> <P>
<HR>
<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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