Re: pcase generates an unprintable expansion for a form in test erc--restore-initialize-priors

[Michael Heerdegen <michael_heerdegen@web.de>]

Stefan Monnier <monnier@iro.umontreal.ca> writes:

> > (pcase '(a . b)
> >   (`(a . ,'b) t))
>
> The code I sent wasn't quite right, indeed.  🙂
> [ I didn't think of it as a failure of the test, but a failure of the
>   code which (re)constructs the resulting quote pattern.  ]

Anyway, apart from this little detail the patch is an obvious
improvement, so please go ahead.  The occupied lisp eval depth shrinks
around 50% when the `pcase' pattern in the originally posted ert test is
compiled.

I must admit however - I still wonder: Code and matched structures will
be proper short-length lists most of the time - would it be possible and
make sense to handle all list elements at the same recursion level
instead of doing O(length) recursive descents?

Michael.