[luatex] Getting the extra primitives?

Manuel Pégourié-Gonnard mpg at elzevir.fr
Tue Feb 16 13:52:48 CET 2010

Taco Hoekwater a écrit :
> function somefunction(A, B)
>   if A == B then
>     tex.sprint("\\@firstoftwo")
>   else
>     tex.sprint("\\@secondoftwo")
>   end
> end
I'd suggest that a more robust version would use the optional "catcode table"
argument of tex.sprint() in order to make sure the strings like "\\@firstoftwo"
are correctly tokenized. Assuming that \catcodetable42 is the standard LaTeX
catcodes plus @ a letter,

function somefunction(A, B)
  if A == B then
    tex.sprint(42, "\\@firstoftwo")
    tex.sprint(42, "\\@secondoftwo")

should work in all circumstances.

By the way, Joseph, do this question mean you are implementing basic support for
LuaTeX in expl3? I'd be glad to hear that!


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