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52 lines
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<TITLE>CLHS: System Class CONS</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="t_null.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_atom.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="cons"><I>System Class</I> <B>CONS</B></A> <P>
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<P><B>Class Precedence List:</B><P>
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<A REL=DEFINITION HREF="#cons"><B>cons</B></A>, <A REL=DEFINITION HREF="t_list.htm#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>
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<P><B>Description:</B><P>
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<P>
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A <A REL=DEFINITION HREF="26_glo_c.htm#cons"><I>cons</I></A> is a compound <A REL=DEFINITION HREF="26_glo_o.htm#object"><I>object</I></A> having two components, called the <A REL=DEFINITION HREF="26_glo_c.htm#car"><I>car</I></A> and <A REL=DEFINITION HREF="26_glo_c.htm#cdr"><I>cdr</I></A>. These form a <A REL=DEFINITION HREF="26_glo_d.htm#dotted_pair"><I>dotted pair</I></A>. Each component can be any <A REL=DEFINITION HREF="26_glo_o.htm#object"><I>object</I></A>. <P>
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<P>
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<P><B>Compound Type Specifier Kind:</B><P>
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<P>
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Specializing. <P>
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<P><B>Compound Type Specifier Syntax:</B><P>
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<P>
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<B>cons</B> <I>[car-typespec [cdr-typespec]]</I><P>
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<P>
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<P><B>Compound Type Specifier Arguments:</B><P>
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<P>
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<I>car-typespec</I>---a <A REL=DEFINITION HREF="26_glo_t.htm#type_specifier"><I>type specifier</I></A>, or the <A REL=DEFINITION HREF="26_glo_s.htm#symbol"><I>symbol</I></A> <A REL=DEFINITION HREF="a_st.htm#ST"><B>*</B></A>. The default is the <A REL=DEFINITION HREF="26_glo_s.htm#symbol"><I>symbol</I></A> <A REL=DEFINITION HREF="a_st.htm#ST"><B>*</B></A>. <P>
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<I>cdr-typespec</I>---a <A REL=DEFINITION HREF="26_glo_t.htm#type_specifier"><I>type specifier</I></A>, or the <A REL=DEFINITION HREF="26_glo_s.htm#symbol"><I>symbol</I></A> <A REL=DEFINITION HREF="a_st.htm#ST"><B>*</B></A>. The default is the <A REL=DEFINITION HREF="26_glo_s.htm#symbol"><I>symbol</I></A> <A REL=DEFINITION HREF="a_st.htm#ST"><B>*</B></A>. <P>
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<P><B>Compound Type Specifier Description:</B><P>
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<P>
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This denotes the set of <A REL=DEFINITION HREF="26_glo_c.htm#cons"><I>conses</I></A> whose <A REL=DEFINITION HREF="26_glo_c.htm#car"><I>car</I></A> is constrained to be of <A REL=DEFINITION HREF="26_glo_t.htm#type"><I>type</I></A> <I>car-typespec</I> and whose <A REL=DEFINITION HREF="26_glo_c.htm#cdr"><I>cdr</I></A> is constrained to be of <A REL=DEFINITION HREF="26_glo_t.htm#type"><I>type</I></A> <I>cdr-typespec</I>. (If either <I>car-typespec</I> or <I>cdr-typespec</I> is <A REL=DEFINITION HREF="a_st.htm#ST"><B>*</B></A>, it is as if the <A REL=DEFINITION HREF="26_glo_t.htm#type"><I>type</I></A> <A REL=DEFINITION HREF="t_t.htm#t"><B>t</B></A> had been denoted.) <P>
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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=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>
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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/iss078.htm">CONS-TYPE-SPECIFIER:ADD</A><P></UL><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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