From: "Mattias Engdegård" <mattiase@acm.org>
To: Stefan Monnier <monnier@iro.umontreal.ca>
Cc: emacs-devel@gnu.org
Subject: Re: master ea93326: Add `union' and `intersection' to rx (bug#37849)
Date: Wed, 11 Dec 2019 12:17:25 +0100 [thread overview]
Message-ID: <A7D4DC03-5CC3-4DEC-9328-4C96BFB97DD2@acm.org> (raw)
In-Reply-To: <jwvpngvvoma.fsf-monnier+emacs@gnu.org>
10 dec. 2019 kl. 22.52 skrev Stefan Monnier <monnier@iro.umontreal.ca>:
> Why not (re)use `or` instead of `union`? IOW make it an optimization?
It probably could, but having to explain the restrictions to the user felt a bit messy, so I went with a neatly closed collection of set operations (union, intersection and complement). Still, some concessions had to be made: operations on character classes are limited, and 'not' allows some types of arguments that cannot be used in set operations at all.
For 'or' to work as argument to 'not' and 'intersection', its arguments would have to be restricted in similar ways. I'll see what can be done.
next prev parent reply other threads:[~2019-12-11 11:17 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20191210213842.5388.30110@vcs0.savannah.gnu.org>
[not found] ` <20191210213843.EB6A520A23@vcs0.savannah.gnu.org>
2019-12-10 21:52 ` master ea93326: Add `union' and `intersection' to rx (bug#37849) Stefan Monnier
2019-12-11 11:17 ` Mattias Engdegård [this message]
2019-12-11 15:10 ` Stefan Monnier
2019-12-12 22:48 ` Mattias Engdegård
2019-12-13 13:55 ` Stefan Monnier
2019-12-13 17:03 ` Mattias Engdegård
2019-12-13 17:13 ` Stefan Monnier
2019-12-13 17:43 ` Mattias Engdegård
2019-12-13 23:03 ` Stefan Monnier
2019-12-15 11:08 ` Mattias Engdegård
2019-12-15 14:53 ` Stefan Monnier
2019-12-15 19:23 ` Mattias Engdegård
2019-12-15 20:04 ` Stefan Monnier
2019-12-15 20:42 ` Stefan Monnier
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