[luatex] callbacks in luatex 0.89

Ulrike Fischer luatex at nililand.de
Thu Feb 11 14:23:38 CET 2016

Am Thu, 11 Feb 2016 10:47:29 +0100 schrieb Hans Hagen:

>> This came up as a user query about some old code of Taco's on
>> stackexchange using token_filter
>> http://tex.stackexchange.com/a/21691/1090
>> What is the intended replacement for token_filter?
> none,

Is there in context code which offers something similar to
\XeTeXinterchartoks? That means can one declare (unicode)
blocks/classes of characters and tokens (e.g. font switches,
language switches etc) which should be inserted between character of
different blocks?

If yes, where is it?

Ulrike Fischer 

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