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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN">
<HTML
><HEAD
><TITLE
>Introduction
[CLHS-1]</TITLE
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>Implementation Notes for <A
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>GNU</A
> <A
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><B
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>CLISP</B
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>.: These notes document <A
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>CLISP</B
></A
> version 2.31.</TH
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><DIV
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><H1
><A
NAME="intro"
></A
>Chapter 1. Introduction
<A
HREF="http://www.lisp.org/HyperSpec/Body/chap-1.html"
TARGET="_top"
>[CLHS-1]</A
></H1
><DIV
CLASS="TOC"
><DL
><DT
><B
>Table of Contents</B
></DT
><DT
>1.1. <A
HREF="intro.html#spec-symb"
>Special Symbols
<A
HREF="http://www.lisp.org/HyperSpec/Body/sec_1-4-1-3.html"
TARGET="_top"
>[CLHS-1.4.1.3]</A
></A
></DT
><DT
>1.2. <A
HREF="error-terms.html"
>Error Terminology
<A
HREF="http://www.lisp.org/HyperSpec/Body/sec_1-4-2.html"
TARGET="_top"
>[CLHS-1.4.2]</A
></A
></DT
><DT
>1.3. <A
HREF="class-prec.html"
>Class Precedence Lists
<A
HREF="http://www.lisp.org/HyperSpec/Body/sec_1-4-4-5.html"
TARGET="_top"
>[CLHS-1.4.4.5]</A
></A
></DT
><DT
>1.4. <A
HREF="cl-symb.html"
>Symbols in the Package <A
HREF="http://www.lisp.org/HyperSpec/Body/sec_11-1-2-1.html"
TARGET="_top"
><STRONG
CLASS="package"
><SPAN
CLASS="QUOTE"
>"COMMON-LISP"</SPAN
></STRONG
></A
>
<A
HREF="http://www.lisp.org/HyperSpec/Body/sec_1-9.html"
TARGET="_top"
>[CLHS-1.9]</A
></A
></DT
></DL
></DIV
><DIV
CLASS="section"
><H1
CLASS="section"
><A
NAME="spec-symb"
></A
>1.1. Special Symbols
<A
HREF="http://www.lisp.org/HyperSpec/Body/sec_1-4-1-3.html"
TARGET="_top"
>[CLHS-1.4.1.3]</A
></H1
><P
ALIGN="justify"
>The final delimiter of an interactive stream: On <A
HREF="http://www.UNIX-systems.org/online.html"
TARGET="_top"
><B
CLASS="emphasis"
>UNIX</B
></A
>, the user
has to type <B
CLASS="keycap"
>Control</B
>-<SPAN
CLASS="keysym"
>D</SPAN
> at the
beginning of a line. On <A
HREF="http://www.freedos.org/"
TARGET="_top"
><B
CLASS="emphasis"
>DOS</B
></A
> or <A
HREF="http://www.willows.com/"
TARGET="_top"
><B
CLASS="emphasis"
>Win32</B
></A
>, the user has to type
<B
CLASS="keycap"
>Control</B
>-<SPAN
CLASS="keysym"
>Z</SPAN
>, followed
by <B
CLASS="keycap"
>Return</B
>. This final delimiter is never actually
seen by programs; no need to test for <SPAN
CLASS="keysym"
>#\^D</SPAN
> or
<SPAN
CLASS="keysym"
>#\^Z</SPAN
> - use <A
HREF="http://www.lisp.org/HyperSpec/Body/fun_read-char-no-hang.html"
TARGET="_top"
><TT
CLASS="function"
>READ-CHAR-NO-HANG</TT
></A
> to check for end of
stream. Calling <A
HREF="http://www.lisp.org/HyperSpec/Body/fun_clear-input.html"
TARGET="_top"
><TT
CLASS="function"
>CLEAR-INPUT</TT
></A
> on the stream removes the <A
HREF="http://www.lisp.org/HyperSpec/Body/glo_e.html#end_of_file"
TARGET="_top"
><TT
CLASS="literal"
>end-of-stream</TT
></A
> state,
thus making it available for further input.</P
><P
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>A newline character can be entered by the user by pressing the
<B
CLASS="keycap"
>Newline</B
> key or, on the numeric keypad, the
<B
CLASS="keycap"
>Enter</B
> key.</P
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<A
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>[CLHS-1.4.2]</A
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