Re: \dorecurse and \recurselevel in Natural Tables

[Wolfgang Schuster <schuster.wolfgang@googlemail.com>]

Am 05.03.2009 um 01:17 schrieb luigi scarso:

> \starttext
> %%% TeX version
> \bTABLE
> \dorecurse{5}
> {\bTR\expandafter \bTD \recurselevel. \eTD\expandafter
>         \bTD \recurselevel  \eTD\eTR}
> \eTABLE
>
> \dorecurse{2}
> {\recurselevel. \recurselevel\crlf}

And you think it's a good idea to use \expandafter in your document?

\expanded is the tool for users to get this result without knowledge
about TeX internals and expansion, this is from core-ntb:

% permits \expanded{\bTD ... \eTD}

\unexpanded\def\eTR{}
\unexpanded\def\eTD{}
\unexpanded\def\eTH{}
\unexpanded\def\eTN{}

> %%% luatex version
> \startluacode
>    tprint = function(s) tex.sprint(tex.ctxcatcodes,s) end
>    tprint('\\bTABLE')
>    for j = 1,5 do
>        tprint('\\bTR')
>        tprint('\\bTD' .. j .. '.' .. '\\eTD' .. '\\bTD' .. j .. '\ 
> \eTD')
>        tprint('\\eTR')
>    end
>    tprint('\\eTABLE')
> \stopluacode
> \stoptext

Nice solution and real alternative for package writers to avoid  
\expandafter
and \expanded but nothing for a normal user, I should keep this in my  
mind.

Wolfgang

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