IMHO, a Racket way would more likely be to avoid bad hygiene, by one of:
* Just doing it as a procedure that takes closures for the `yes`and `no`
arguments (with the `yes` one taking arguments for `head` and `tail`).
* Doing it as syntax, but having the user of the extension define the .
(This might seem overkill, but maybe that's because that's because the
original macro is already overkill.)
For Racket, I think presenting a non-hygienic problem is counterproductive.
BTW, you are to be commended for asking about this. I hope you will
join the Don't Use Eval Club.
http://lists.racket-lang.org/users/archive/2014-July/063597.html
Neil V.
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