[luatex] macros to invoke lua in LaTeX

[Taco Hoekwater]

Elie Roux wrote:
> Taco Hoekwater a écrit :
>> Because your redefinition won't be needed from 0.40 upwards and
>> will in fact be wrong from 0.50 up.
> 
> Sorry to come back to this, but there is still something I don't
> understand: what will be the good call (the one that doesn't warn about
> states) to execute lua code in LuaTeX 0.40? \directlua with no state
> argument?

Yes. \directlua0 {} will trigger a warning message about the integer
argument going away in 0.50.