%==================================================================
%                          A P L S T Y L E
%==================================================================
% A.Hohti/O.Kanerva  University of Helsinki  April 6 1987
%                                            revised August 19 1987
%
% APL symbols are represented by the Digital (VAX) APL
% replacement symbols. The standard escape character is
% changed to "@" (at sign) in accordance with the usage
% in Digital APL.
%
\font\apl=cmapl10      % The APL font of typewriter type
%
%
% The following macro \choosett switches the typewriter-like
% font used within verbatim:
%
\def\ifundefined#1{\expandafter\ifx\csname#1\endcsname\relax}
\newif\ifapl         \def\aplname{apl}
\outer\def\choosett#1{\ifundefined{#1}%
        \message{Undefined font(?), replaced with cmtt10}%
        \let\tt=\tentt
           \else
        \def\tt{\expandafter\csname#1\endcsname}%
        \def\ttname{#1}%
        \ifx\ttname\aplname\apltrue\else\aplfalse\fi\fi}
%
\choosett{tentt}    % default value
%
\input versatim     % a slightly modified version of verbatim
\input apldef       % control sequences for APL symbols