[luatex] Getting the extra primitives?

[Joseph Wright]

On 16/02/2010 10:55, Taco Hoekwater wrote:
>
>
> Joseph Wright wrote:
>>
>> This is LuaTeX, Version beta-0.40.6-2009110118 (Web2C 2009)
>> (format.ltx
>> ! LuaTeX error wrong number of arguments
>> stack traceback:
>>          [C]: in function 'enableprimitives'
>>          <\directlua>:1: in main chunk.
>> l.27   }
>>
>> ?
>> ! Emergency stop.
>> l.27   }
>>
>> What did I get wrong?
>
> That depends on line 1-26 of your input file.
>
> Best wishes,
> Taco
>

Hello Taco,

Hmm, very odd: after moving the lines around the problem has gone away, 
even putting everything back as it was. Not sure quite what I messed up: 
sorry for the noise.

Next question, which is sort-of related (now I have some primitives!). 
LuaTeX doesn't have \pdfstrcmp, so what is the best way to do

\def\somefunction#1#2{%
   \ifnum\pdfstrmp{\unexpanded{#1}}{\unexpanded{#2}} = 0\relax
     \expandafter\@firstoftwo
   \else
     \expandafter\@secondoftwo
   \fi
}
\def\someotherfunction#1#2{%
   \ifnum\pdfstrmp{#1}{#2} = 0\relax
     \expandafter\@firstoftwo
   \else
     \expandafter\@secondoftwo
   \fi
}

in LuaTeX? Obviously "using Lua", but I'm still trying to get the hang 
of things.
-- 
Joseph Wright