[luatex] Luatex primitive names

Ulrike Fischer luatex at nililand.de
Tue Mar 10 14:42:36 CET 2009

Am Tue, 10 Mar 2009 14:18:18 +0100 schrieb Hans Hagen:

>> Yes, enabling \luatexversion is not so clean and consistent. But I
>> like the idea to have a simple and reliable command to identify the
>> engine. This would avoid problems like the one we got with faulty
>> \pdfoutput-tests. 
> \directlua will always be there as it is needed to enable the primitives 
>   so it is a save test

If \directlua is only offered by luatex, then yes. But Manual wrote

"Now I'd rather test for \directlua. *But* if some day Jonathan
include Lua as a scripting language in XeTeX, things will be more

and I thought this meant that perhaps \directlua will also be
included in XeTeX. 

Ulrike Fischer 

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