[luatex] Luatex primitive names

[Manuel Pégourié-Gonnard]

Arthur Reutenauer a écrit :
>> LuaTeX is still beta, so in my opinion it makes no sense to write code
>> compatible with previous versions of luatex (previous to the current
>> one at every moment, while it still be in beta state).
> 
>   Agreed.
> 
Sorry but I don't agree. Detecting the version (if a convenient mechanism is
available) costs essentially nothing and can make things simpler for users,
which is always important, even in beta stage, IMHO.

Manuel.