[luatex] Lua interface to \errmessage ?

[Manuel Pégourié-Gonnard]

Hi,

Unless I'm mistaken, there is currently no Lua interface to TeX's primitive
\errmessage (and \errhelp). Of course, there is Lua's error(), but it doesn't
exactly allow to generate nice-looking messages :-)

Did I miss something? Is there anything like this planned? (A function like
tex.errmessage(<string> message, [<string> long_help]) would be great, for example.)

Thanks,
Manuel.

PS: using tex.sprint("\errmessage{...}") won't work, eg, inside an \edef.