GNU bug report logs - #72754
31.0.50; Add a pcase-pattern-let?

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Message #11 received at 72754 <at> debbugs.gnu.org (full text, mbox):

From: Michael Heerdegen <michael_heerdegen <at> web.de>
To: Stefan Monnier <monnier <at> iro.umontreal.ca>
Cc: 72754 <at> debbugs.gnu.org
Subject: Re: bug#72754: 31.0.50; Add a pcase-pattern-let?
Date: Sat, 24 Aug 2024 07:56:44 +0200

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

> > wouldn't it be a significant improvement and maybe a low hanging fruit
> > to add a macro allowing to add local pattern definitions?  I.e., like
> > `macrolet' by for pcase patterns?
>
> I don't know how important/useful it would be, but yes it would make
> a lot of sense.  As a matter of fact, it's a general pattern which
> recurs in all the packages which provide an extensible domain specific
> language (peg.el, pcase.el, bindat.el, rx.el, gv.el, ...) and I'd like
> to find a general solution.

Makes sense, we could then also implement the dynamical docstring
generation for all of these in a general way.  As whole it's a bigger
project, though.

> It can also make sense to allow defining a set of extensions at one
> place, and then make them available locally.

Absolutely.

If you want to give it a try, I'm here...


Michael.

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