the reason that \mathchar and \mathchardef does not produce an error
message when processed outside mathmode is that Don decided that this is
a good way to store numbers and to be used in programming. If that would
suddnely raise error this would kill a lot of lowlevel code
this is similar to other places, eg if you say \newbox\foo
and then \foo instead of \box\foo you end up with a printed symbol (no
error message, etc. In my opinion those optimizations can't be taken
out of the TeX program without invalidating too much
frank
_______________________________________________
dev-luatex mailing list
dev-luatex@ntg.nl
https://mailman.ntg.nl/mailman/listinfo/dev-luatex
