[luatex] How to query fonts.handlers

[Ulrike Fischer]

Am Wed, 6 Feb 2019 10:41:44 +1300 schrieb Henri Menke:

> Is there a way to query the lookups?

You are the lua guy ;-). But looking in the fontloader, I think the
generic function to query the lookups is

 local function getgsub(tfmdata,k,kind,value)

and this is then used by getkern.

There is also a otf.collectlookups.  

-- 
Ulrike Fischer 
https://www.troubleshooting-tex.de/