40 lines
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40 lines
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<TITLE>19.7. Structures of Explicitly Specified Representational Type</TITLE>
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<b>Common Lisp the Language, 2nd Edition</b>
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<BR> <HR><A NAME=tex2html3712 HREF="node176.html"><IMG ALIGN=BOTTOM ALT="next" SRC="icons/next_motif.gif"></A> <A NAME=tex2html3710 HREF="node168.html"><IMG ALIGN=BOTTOM ALT="up" SRC="icons/up_motif.gif"></A> <A NAME=tex2html3706 HREF="node174.html"><IMG ALIGN=BOTTOM ALT="previous" SRC="icons/previous_motif.gif"></A> <A NAME=tex2html3714 HREF="node1.html"><IMG ALIGN=BOTTOM ALT="contents" SRC="icons/contents_motif.gif"></A> <A NAME=tex2html3715 HREF="index.html"><IMG ALIGN=BOTTOM ALT="index" SRC="icons/index_motif.gif"></A> <BR>
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<B> Next:</B> <A NAME=tex2html3713 HREF="node176.html"> Unnamed Structures</A>
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<B>Up:</B> <A NAME=tex2html3711 HREF="node168.html"> Structures</A>
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<B> Previous:</B> <A NAME=tex2html3707 HREF="node174.html"> By-Position Constructor Functions</A>
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<HR> <P>
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<H1><A NAME=SECTION002370000000000000000>19.7. Structures of Explicitly Specified Representational Type</A></H1>
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<P>
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<A NAME=EXPLICITTYPESTRUCTURES>Sometimes</A>
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it is important to have explicit control
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over the representation of a structure. The <tt>:type</tt>
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option allows one to specify that a structure must be implemented
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in a particular way, using a list or a specific kind of vector,
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and to specify the exact allocation of structure slots to
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components of the representation.
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A structure may also be ``unnamed'' or ``named,'' according to whether
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the structure name is stored in (and thus recoverable from) the structure.
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<P>
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<LI> <A NAME=tex2html3716 HREF="node176.html#SECTION002371000000000000000"> Unnamed Structures</A>
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<LI> <A NAME=tex2html3717 HREF="node177.html#SECTION002372000000000000000"> Named Structures</A>
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<LI> <A NAME=tex2html3718 HREF="node178.html#SECTION002373000000000000000"> Other Aspects of Explicitly Specified Structures</A>
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<P><ADDRESS>
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AI.Repository@cs.cmu.edu
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