alltt.sty

% ALLTT DOCUMENT-STYLE OPTION - released 17 December 1987
%    for LaTeX version 2.09
% Copyright (C) 1987 by Leslie Lamport

% Defines the `alltt' environment, which is like the `verbatim'
% environment except that `\', `\{', and `\}' have their usual meanings.
% Thus, other commands and environemnts can appear within an `alltt'
% environment.  Here are some things you may want to do in an `alltt'
% environment:
% 
% * Change fonts--e.g., by typing `{\em empasized text\/}'.
% 
% * Insert text from a file foo.tex by typing `input{foo}'.  Beware that
%   each <return> stars a new line, so if foo.tex ends with a <return>
%   you can wind up with an extra blank line if you're not careful.
% 
% * Insert a math formula.  Note that `$' just produces a dollar sign,
%   so you'll have to type `\(...\)' or `\[...\]'.  Also, `^' and `_'
%   just produce their characters; use `\sp' or `\sb' for super- and
%   subscripts, as in `\(x\sp{2}\)'.

\def\docspecials{\do\ \do\$\do\&%
  \do\#\do\^\do\^^K\do\_\do\^^A\do\%\do\~}

\def\alltt{\trivlist \item[]\if@minipage\else\vskip\parskip\fi
\leftskip\@totalleftmargin\rightskip\z@
\parindent\z@\parfillskip\@flushglue\parskip\z@
\@tempswafalse \def\par{\if@tempswa\hbox{}\fi\@tempswatrue\@@par}
\obeylines \tt \catcode``=13 \@noligs \let\do\@makeother \docspecials
 \frenchspacing\@vobeyspaces}

\let\endalltt=\endtrivlist