[luatex] Luatex primitive names

[Manuel Pégourié-Gonnard]

Hans Hagen a écrit :
>>   Sure enough.  I guess we could rule that \directlua per se
>> characterizes LuaTeX well enough, and that XeTeX, or any other
> 
> also, one can test for \XeTeXversion first
> 
Sure. But only because XeTeX provides a simple, immuable and unambiguous way of
identification. My whole point is that every engine should provide such a
mechanism, and the more coherent choice IMO is a \<engine-name>version primitive.

It costs essentially nothing, and avoids a lot of possible problems, now and in
the future.

Manuel.