Re: use Elisp to improve your Elisp - some code issues

[Pascal J. Bourguignon]

Emanuel Berg <embe8573@student.uu.se> writes:

> "Pascal J. Bourguignon" <pjb@informatimago.com>
> writes:
>
>> Perhaps you have notied some discrepancy here.
>> Check:
>> https://en.wikipedia.org/wiki/Chomsky_hierarchy
>
> It would be more illustrative if you provide
> a counterexample of the same construct which cannot be
> caught by that or another regexp. It will be
> interesting to see if that example is anything I would
> put in my code, ever.

It's easy.  Try to simplify (- x x) for any sexp x, (assuming x doesn't
side effect.  Just something like (+ 2 y) or (+ (* a x x) (* b x) c).



-- 
__Pascal Bourguignon__                 http://www.informatimago.com/
“The factory of the future will have only two employees, a man and a
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