[texhax] Simple line numbering for tabular environments

[E. Krishnan]

On Wed, 18 Jul 2007, James Smith wrote:

> \begin{tabular*}{\linewidth}
> {l>{$}l<{$}>{$}l<{$}}
> \hline\\
> 1&\mathsf{process\_file}(*f:file)\{\\
> 2&\quad l:string\\
> 3&\quad l=\mathsf{read\_line}(f)\\
> 4&\quad\mathsf{while}(l\neq\epsilon))\{\\
> 5&\quad\quad l=\mathsf{read\_line}(f)\\
> 6&\quad\}\\
> 7&\}\\
> \\
> \hline
> \end{tabular*}
>...........
> I need the maths environment...... constantly renumbering the lines when 
> I change the listings becomes tiresome, so can I automate this process. 
> .......I'd like to keep the tabular* environment if at all possible.


Please try this:


\usepackage{array}


\newcolumntype{M}{>{$}l<{$}}

\newcounter{rowno}
\setcounter{rowno}{0}
\newcommand{\slno}{\addtocounter{rowno}{1}\therowno}
\newcolumntype{N}{>{\slno}l}


\begin{tabular*}{\linewidth}{NMM}
   \hline
   \multicolumn{3}{c}{}\\
   &\mathsf{process\_file}(*f:file)\{\\
   &\quad l:string\\
   &\quad l=\mathsf{read\_line}(f)\\
   &\quad\mathsf{while}(l\neq\epsilon))\{\\
   &\quad\quad l=\mathsf{read\_line}(f)\\
   &\quad\}\\
   &\}\\
   \multicolumn{3}{c}{}\\
   \hline
\end{tabular*}



-- 
Krishnan