Re: Bug in \cslet.

[Stepan Kasal]

Hello David,

I guess I'm the author of the previous version.  The TeXbook explains
that you have to use three expandafter's to get something expanded twice:

\let\ea\expandafter \let\eA\expandafter
% expand \twice twice
\ea \eA \ea \twice
% (\eA is used in the second round.)

So it was really natural to write:

\ea\eA\ea \let \ea\eA \csname#1\endcsname \csname#2\endcsname

The two \eA's are expanded in the second round.

Karl wrote:
> > But I switched to your code anyway, since it's shorter and more
> > easily understood.  At least I hope I'm understanding it!

I'd say it's more terse and more tricky.  But I'm glad your black magic
has got in.  ;-)

Happy TeXing,
        Stepan Kasal