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

On 4/24/2013 6:50 PM, luigi scarso wrote:

On Wed, Apr 24, 2013 at 5:51 PM, Sietse Brouwer 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

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