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73 lines
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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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<HEAD>
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<TITLE>Appendix A. Series</TITLE>
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<BODY>
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<meta name="description" value=" Series">
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<meta name="keywords" value="clm">
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<meta name="resource-type" value="document">
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<meta name="distribution" value="global">
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<P>
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<b>Common Lisp the Language, 2nd Edition</b>
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<BR> <HR><A NAME=tex2html6024 HREF="node348.html"><IMG ALIGN=BOTTOM ALT="next" SRC="icons/next_motif.gif"></A> <A NAME=tex2html6022 HREF="clm.html"><IMG ALIGN=BOTTOM ALT="up" SRC="icons/up_motif.gif"></A> <A NAME=tex2html6016 HREF="node346.html"><IMG ALIGN=BOTTOM ALT="previous" SRC="icons/previous_motif.gif"></A> <A NAME=tex2html6026 HREF="node1.html"><IMG ALIGN=BOTTOM ALT="contents" SRC="icons/contents_motif.gif"></A> <A NAME=tex2html6027 HREF="index.html"><IMG ALIGN=BOTTOM ALT="index" SRC="icons/index_motif.gif"></A> <BR>
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<B> Next:</B> <A NAME=tex2html6025 HREF="node348.html"> Introduction</A>
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<B>Up:</B> <A NAME=tex2html6023 HREF="clm.html">Common Lisp the Language</A>
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<B> Previous:</B> <A NAME=tex2html6017 HREF="node346.html"> Predefined Condition Types</A>
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<HR> <P>
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<H1><A NAME=SECTION003400000000000000000>Appendix A.<br>Series</A></H1>
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By Richard C. Waters
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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=SERIES><TT>PREFACE:</TT></A>
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A series is a data structure much like a sequence, with similar
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kinds of operations. The difference is that in many situations, operations
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on series may be composed functionally and yet execute iteratively, without
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the need to construct intermediate series values explicitly. In this
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manner, series provide both the clarity of a functional programming style
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and the efficiency of an iterative programming style.
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<P>
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The remainder of this chapter consists of a description by Richard
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C. Waters of his work on an existing implementation of series.
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This is the culmination of many years of design and use of this approach,
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during which some 100,000 lines of application code have been written (by
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about half a dozen people over the course of seven years) using the series
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facility in nearly all iteration situations. This includes one large
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system (<tt>KBEmacs</tt>) of over 40,000 lines of code.
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<P>
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I have edited the chapter only very lightly to conform to the overall style
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of this book. Please see the Preface to this book for more information
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about the genesis of the series approach and its relationship to the work
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of X3J13.
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<P>
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<blockquote>
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-Guy L. Steele Jr.
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</blockquote>
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<img align=bottom alt="change_end" src="gif/change_end.gif">
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<HR>
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<UL>
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<LI> <A NAME=tex2html6028 HREF="node348.html#SECTION003410000000000000000"> Introduction</A>
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<LI> <A NAME=tex2html6029 HREF="node349.html#SECTION003420000000000000000"> Series Functions</A>
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<UL>
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<LI> <A NAME=tex2html6030 HREF="node350.html#SECTION003421000000000000000"> Scanners</A>
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<LI> <A NAME=tex2html6031 HREF="node351.html#SECTION003422000000000000000"> Mapping</A>
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<LI> <A NAME=tex2html6032 HREF="node352.html#SECTION003423000000000000000"> Truncation and Other Simple Transducers</A>
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<LI> <A NAME=tex2html6033 HREF="node353.html#SECTION003424000000000000000"> Conditional and Other Complex Transducers</A>
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<LI> <A NAME=tex2html6034 HREF="node354.html#SECTION003425000000000000000"> Collectors</A>
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<LI> <A NAME=tex2html6035 HREF="node355.html#SECTION003426000000000000000"> Alteration of Series</A>
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</UL>
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<LI> <A NAME=tex2html6036 HREF="node356.html#SECTION003430000000000000000"> Optimization</A>
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<UL>
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<LI> <A NAME=tex2html6037 HREF="node357.html#SECTION003431000000000000000"> Basic Restrictions</A>
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<LI> <A NAME=tex2html6038 HREF="node358.html#SECTION003432000000000000000"> Constraint Cycles</A>
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<LI> <A NAME=tex2html6039 HREF="node359.html#SECTION003433000000000000000"> Defining New Series Functions</A>
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<LI> <A NAME=tex2html6040 HREF="node360.html#SECTION003434000000000000000"> Declarations</A>
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</UL>
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<LI> <A NAME=tex2html6041 HREF="node361.html#SECTION003440000000000000000"> Primitives</A>
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</UL>
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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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