[luatex] callbacks in luatex 0.89

[Hans Hagen]

On 2/11/2016 2:23 PM, Ulrike Fischer wrote:
> 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?

No, because it's not the way context does things (or at least I never 
needed it so I never bothered to look into writing it). I would probably 
look into it when there was demand for some feature not supported yet. 
Even then I'd probably not rely interpreting unicode characters but on 
proper tagging because one never knows what the intended use/rendering 
of some character at some point it.

Hans

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