[luatex] Detecting script

[Arthur Reutenauer]

> Which is the best way to detect a change of script and inject some
> (more or less) arbitrary code? At first I thought token_filter could be
> a possibility, but it will be gone and I presume there are other options.

  Could you describe your use case a bit more?  I suppose it involves
operations you can’t do at the node level, so the suggestion to use
pre_linebreak_filter doesn’t work.

	Best,

		Arthur