[luatex] Expanding text in lua

[Khaled Hosny]

(Pretending to be TeXhacker and using terminology I don't actually
understand)
I was wondering if one can take a string of TeX input and expand it at
lua end to get its basic form for further processing, say we have:

\def\sometext{some text}
\def\sometalk{I wrote\sometext\ for a talk}

Then I can pass \sometalk to lua and get the "I wrote some text for a
talk" string out of it.

Regards,
 Khaled

-- 
 Khaled Hosny
 Arabic localiser and member of Arabeyes.org team
 Free font developer