[NTG-context] eating up &

[Hans van der Meer]

I want to do something with & in tables (making it an active column  
separator).
Now I have a macro with two arguments for parameters in Context style:

\def\starttablex{\dodoubleargument\dostarttablex}
\def\dostarttablex[#1][#2]{%

Now for input: \starttable[][] & ... all is well,
but for input: \starttable[]   & ... the ampersand appears to be  
eaten up by the double argument expansion.

How can I prevent that, letting & end the parameter scanning and  
using it as the first input?

Hans van der Meer



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