\documentclass{minimal}
\usepackage{color}
\makeatletter
\showboxdepth=100
\showboxbreadth=100

%\iftrue
\iffalse
\usepackage{cals}
\else
\input{cell.dtx}
\input{table.dtx}
\input{span.dtx}
\input{lltokens.dtx}
\input{decor.dtx}
\input{colsep.dtx}
\input{rowsep.dtx}
\input{rtl.dtx}
\fi

% Variables defined inside calstable environment
\let\cals@thead@tokens=\relax
\let\cals@tfoot@tokens=\relax
\let\cals@tbreak@tokens=\relax
\let\cals@ifInRspan=\cals@iffalse
\let\cals@ifLastRspanRow=\cals@iftrue
\let\cals@borderL=\relax
\let\cals@borderR=\relax
\let\cals@borderT=\relax
\let\cals@borderB=\relax

\begin{document}
##CODE##
\end{document}
