Re: \dorecurse and \recurselevel in Natural Tables

[Willi Egger <w.egger@boede.nl>]

Hi Aditya,

Happy luaTeXing. Great summary.

Willi

On Mar 6, 2009, at 4:05 AM, Aditya Mahajan wrote:

> On Thu, 5 Mar 2009, luigi scarso wrote:
>
>> On Thu, Mar 5, 2009 at 12:09 PM, Wolfgang Schuster
>> <schuster.wolfgang@googlemail.com> wrote:
>>>
>>> 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?
>> TeX  version, not context ... :)
>> btw
>> \expandafer is not so bad, if used moderatly .
>>
>>>
>>> \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{}
>> yes, of course one need to know about \expandafter... so is not so  
>> different .
>> But it's context style.
>>
>>>
>>>> %%% 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.
>> Are you sure ?
>> What is a normal user ?
>> As soon as you use \dorecurse , you become a programmer .
>>
>> And sooner or later, everyone become a programmer, because it's
>> impossible to write a format that satisfied
>> all your needs .
>
> My summary of this thread:
> http://randomdeterminism.wordpress.com/2009/03/05/tex-programming- 
> the-past-the-present-and-the-future/
>
> Aditya________________________________________________________________ 
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