%
% Syntax typesetting package for LaTeX 2e
%
-% (c) 1996 Mark Wooding
+% (c) 2003 Mark Wooding
%
% \end{meta-comment}
%
% \begin{meta-comment} <general public licence>
%%
%% syntax package -- typesetting syntax descriptions
-%% Copyright (c) 1996 Mark Wooding
+%% Copyright (c) 2003 Mark Wooding
%%
%% This program is free software; you can redistribute it and/or modify
%% it under the terms of the GNU General Public License as published by
% \begin{meta-comment} <Package preamble>
%<+package>\NeedsTeXFormat{LaTeX2e}
%<+package>\ProvidesPackage{syntax}
-%<+package> [1996/05/17 1.07 Syntax typesetting (MDW)]
+%<+package> [2003/08/25 1.08 Syntax typesetting (MDW)]
% \end{meta-comment}
%
-% ^^A \CheckSum{1504}
+% \CheckSum{1616}
%% \CharacterTable
%% {Upper-case \A\B\C\D\E\F\G\H\I\J\K\L\M\N\O\P\Q\R\S\T\U\V\W\X\Y\Z
%% Lower-case \a\b\c\d\e\f\g\h\i\j\k\l\m\n\o\p\q\r\s\t\u\v\w\x\y\z
% \begin{listing}
%\def\<#1>{\synt{#1}}
% \end{listing}
-% to allow you to type "\\<"<text>">" as an alternative to
+% to allow you to type "\\<"<text>">" as an alternative to
% "\\synt{"<text>"}".
%
% \DescribeMacro\lit
% \DescribeMacro{\[[}
% \DescribeMacro{\]]}
% You can use syntax diagrams (see below) instead of a straight piece of BNF
-% by enclosing it in a |\[[| \dots |\]]| pair. Note that you can't mix
+% by enclosing it in a |\[[| \dots |\]]| pair. Note that you can't mix
% syntax diagrams and BNF in a production rule, and you will get something
% which looks very strange if you try.
%
%
% \DescribeMacro\tok
% You can also include text using the |\tok| command. The argument of this
-% command is typeset in \LaTeX's LR~mode and inserted into the diagram.
+% command is typeset in \LaTeX's LR~mode and inserted into the diagram.
% Syntax abbreviations are allowed within the argument, so you can, for
% example, include textual descriptions like
% \begin{listing}
%
% Note that items on the backwards arrow of a \env{rep} construction should
% be displayed \emph{backwards}. You must put the individual items in
-% reverse order when building this part of your diagrams. \syn\ will
+% reverse order when building this part of your diagrams. \syn\ will
% correctly reverse the arrows on \env{rep} structures, but apart from
% this, you must cope on your own. You are recommended to keep these parts
% of your diagrams as simple as possible to avoid confusing readers.
%
% You can also alter the appearance of \env{stack}s and \env{rep}s by using
% their optional positioning arguments. By default, \env{stack}s descend
-% below the main line of the diagram, and \env{rep}s extend above it.
+% below the main line of the diagram, and \env{rep}s extend above it.
% Specifying an optional argument of |[b]| for either environment reverses
% this, putting \env{stack}s above and \env{rep}s below the line.
%
% commands, in \env{grammar} environments, and in syntax diagrams.
%
%
-% \section{Change history}
-%
-% \subsection*{Version 1.07}
-%
-% \begin{itemize}
-% \item Fixed problem with underscore hacking in a \env{tabbing} environment.
-% \end{itemize}
-%
-% \subsection*{Version 1.06}
-%
-% \begin{itemize}
-% \item Added style hooks for syntax items.
-% \item Improved colour handling in syntax diagrams, thanks to the |\doafter|
-% package.
-% \item Fixed some nasty bugs in the \env{grammar} environment which confused
-% other lists and ruined the spacing. The \env{grammar} handling is
-% now much tidier in general.
-% \end{itemize}
-%
-% \subsection*{Version 1.05}
-%
-% \begin{itemize}
-% \item Fixed `the bug' in the syntax diagram typesetting. It now breaks
-% lines almost psychically, and doesn't break in the wrong places.
-% \item Almost rewrote the \env{grammar} environment. It now does lots of
-% the list handling itself, to allow more versatile typesetting of the
-% left hand sides. There's lots of evil in there now.
-% \item Added some more configurability. In particular, two new settings
-% have been added to control \env{grammar} environments, and a neat
-% way of adding new syntax diagram structures has been introduced.
-% \end{itemize}
-%
-% \subsection*{Version 1.04}
-%
-% \begin{itemize}
-% \item Changed the vertical positioning of the rules, to make all the text
-% line up properly. While the old version was elegant and simple, it
-% had the drawback of looking nasty.
-% \item Allow line breaks at underscores, but don't if there's another one
-% afterwards. Also, prevent losing following space if underscore is
-% written to a file.
-% \end{itemize}
-%
-% \subsection*{Version 1.02}
-%
-% \begin{itemize}
-% \item Added support for rounded corners in syntax diagrams.
-% \item Changed lots of |\hskip| commands to |\kern|s, to prevent possible
-% line breaks.
-% \end{itemize}
-%
-% \subsection*{Version 1.01}
-%
-% \begin{itemize}
-% \item Allowed disabling of underscore active character, to avoid messing
-% up filenames.
-% \item Added |\grammarparsep| and |\grammarindent| length parameters to
-% control the appearance of grammars.
-% \end{itemize}
-%
% \implementation
%
% \section{Implementation of \syn}
% characters through. By default, we re-enable |\|, and make `\verb*" "'
% typeset some space glue, rather than a space character. A macro
% `\verb*"\ "' is defined to actually print a space character, which yield
-% `\verb*" "' in the `|\tt|' font.
+% `\verb*" "' in the `|\tt|' font.
%
% Finally, it defines a |\ch| command, which, given a single-character
% control sequence as its argument, typesets the character. This is useful,
\addspecial\|%
\addspecial\"%
\catcode`\|\active%
- \catcode`\<\active%
+ \catcode`\<\active%
\catcode`\"\active%
\catcode`\`\active%
}
}
\def\sd@leftarr{%
\bgroup%
- \raise\sd@mid\hbox{\@linefnt\char'33\kern-6\p@}%
+ \setbox\tw@\hbox{\@linefnt\char'33\kern-6\p@}%
\sd@arrow%
}
% \end{macrocode}
~mdw / mdwtools / blobdiff