[luatex] incompatible change to mathcode

Khaled Hosny khaledhosny at eglug.org
Wed May 9 13:30:15 CEST 2012

On Wed, May 09, 2012 at 11:42:17AM +0100, David Carlisle wrote:
> On 09/05/2012 09:16, Taco Hoekwater wrote:
> >So if you do not want incompatibilities with TeX82, it would help if
> >you did not use extended primitives to define stuff.
> Yes but as you know, there isn't a single "you" involved here. If bm (or
> amsmath) or any other ancient bit of code that's using \mathcode gets
> used in lualatex, then the person who wrote the package and the person
> using the package are typically not the person who set up the mathcode
> of the letter a. So you are asking three people doing work decades apart
> to cooperate:-)

In this case it is even not one of the three, but whoever decided to use
\Umathcode in lua(la)latex.ini :)


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