[XeTeX] making ucharclasses "really" free, but there's some contributed code that doesn't work, which I don't understand =)

[enrico.gregorio at univr.it]

> Hi all,
> 
> I'm changing the ucharclasses license from "free, but please run 
> modifications through me, because then we don't get a million 
> versions" 
> to "free, and I stopped caring" so it can go into TeX Live, etc.
> 
> At the same time I figured I'd switch the code over to some code 
> contributed by Enrico Gregorio a while back, which is really 
> clever and 
> a lot faster, except... it doesn't work. And the code is clever 
> enough 
> for me to not quite understand where it breaks down =D
> 
> Would anyone be willing to have a look at 
> https://github.com/pomax/ucharclasses/tree/2.0c to see why 
> interchar 
> transition rules either never get bound, or just never fire? 
> xelatex 
> will happily use the .sty code, without throwing any errors, so 
> there's 
> nothing that I can immediately point a finger at and go "aha! 
> this is 
> where things break down". And I still suck at reading plain TeX...
> 
> (There's a minimal test.tex in the branch that demonstrates that 
> it 
> doesn't work, for convenience)
> 
> To anyone willing to give debugging a shot: you are a hero.
> 
> - Mike "Pomax" Kamermans

Just remove two lines I stupidly added at the end: remove from "Now we free" up
to \AllClasses.

  % ----------------------------------------------------------------------------
    
  % Now we free the memory occupied by the |\enableX| commands
  %\def\do#1#2#3{\expandafter\let\csname enable#1\endcsname\@undefined}
  %\AllClasses
  \let\do\@undefined\let\doclass\@undefined

  \endinput
  %
  % End of file `ucharclasses.sty'.

Ciao
Enrico

--
Enrico Gregorio          + Dipartimento di Informatica          + Tel: +39 045 8027937
Enrico.Gregorio at univr.it + Università degli Studi di Verona     +
(gregorio at math.unipd.it) + Strada le Grazie 15 / I-37134 Verona + Fax: +39 045 8027928