[luatex] macro definition inside a callback

[Khaled Hosny]

On Fri, Sep 07, 2012 at 08:03:52AM +0200, Arno Trautmann wrote:
> Hi all,
> 
> maybe a somewhat strange question again from me: Is it possible to
> define a macro inside the *_linebreak_filters? I want to use a
> function in the pre_linebreak_filter, and this function should
> define a macro. So the macro should be present with a new definition
> at the beginning of the next paragraph, but only if the previous one
> has been typeset with that function registered, which removes itself
> after running.

Why not use some global variable that can be set/checked as appropriate?

Regards,
 Khaled