[tex-eplain] optional arguments

Karl Berry karl at freefriends.org
Fri Aug 28 02:08:47 CEST 2009


    And a result later. \residx[sub]{result}
    However, what is produced in the index is the entry "result" with the
    subentry "optionalarg ". (Note it also has an extra space.)

Looking at the .idx file, I see:

\indexentry{result!\@optionalarg }{1}

So evidently the \@optionalarg macro is not expanded in the call to
\sidx.  I don't see any particularly easy workaround.  Might have to
construct the second call \sidx in a macro and \edef it :(.  Oleg?

The spurious space is a side effect of the non-expansion.


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