[NTG-context] Accessing string contents of a macro in Lua.

Hans Hagen pragma at wxs.nl
Wed Apr 24 21:21:16 CEST 2013


On 4/24/2013 6:50 PM, luigi scarso wrote:
> On Wed, Apr 24, 2013 at 5:51 PM, Sietse Brouwer <sbbrouwer at gmail.com> wrote:
>> Hi all,
>>
>> Below are three methods of defining a dimension / dimension string in
>> ConTeXt --- the first two boil down to storing a string in a macro,
>> the last is a proper TeX dimen. I want to access these dimensions from
>> Lua.
>>
>> I can access the dimen via tex.dimen.ColumnC, but how can I access the
>> macro contents?
>> If there is no solution, I can always explicitly pass the value to Lua with
>>
>>      \ctxlua{var = '\measure{ColumnA}'}
>>
>> , but I want to know if there is a Lua-only method to get these values.
>>
>> %% MWE
>> \definemeasure[ColumnA][10mm]
>>
>> \def\ColumnB{20mm}
%
> not a general solution
> %%%
> \def\ColumnB{20mm}

\newtoks\MyColumnB  \MyColumnB{20mm}

> \starttext
> \startluacode
> local c = "\\csname ColumnB\\endcsname"
> context("ColumnB=%s",c)
> \stopluacode
>
> \par
> \toks0=\expandafter{\ColumnB}
> \startluacode
> context("ColumnB=%s",tex.toks[0])

context("ColumnB=%s",tex.toks.MyColumnB)

> \stopluacode
>
> \stoptext
>
>
>
>
> --
> luigi
> ___________________________________________________________________________________
> If your question is of interest to others as well, please add an entry to the Wiki!
>
> maillist : ntg-context at ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
> webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
> archive  : http://foundry.supelec.fr/projects/contextrev/
> wiki     : http://contextgarden.net
> ___________________________________________________________________________________
>


-- 

-----------------------------------------------------------------
                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
     tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com
                                              | www.pragma-pod.nl
-----------------------------------------------------------------


More information about the ntg-context mailing list