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Quick pcase question
From: |
Eric Abrahamsen |
Subject: |
Quick pcase question |
Date: |
Wed, 02 Mar 2016 18:12:51 +0800 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/25.1.50 (gnu/linux) |
I'm enjoying pcase quite a bit, particular when employed as a kind of
improved destructuring-bind. I think I've got the hang of most of it
(despite the docs being a bit... succinct), but have one leftover
question I keep running into.
What I want to do is: "if this atom matches a predicate, the whole
pattern matches, and also bind the atom to this local variable."
Right now I'm making that work like this:
(setq tst '(symbolla . "I'm the string"))
(pcase tst
(`(symbolla . ,(and x (pred stringp)))
(message "cdr is a string: %s" x)))
Is the ",(and x (pred stringp))" part really the simplest way of doing
that? It just seems a little unintuitive.
Thanks,
Eric
- Quick pcase question,
Eric Abrahamsen <=
- Re: Quick pcase question, Michael Heerdegen, 2016/03/02
- Re: Quick pcase question, Eric Abrahamsen, 2016/03/02
- Re: Quick pcase question, Michael Heerdegen, 2016/03/02
- Re: Quick pcase question, Eric Abrahamsen, 2016/03/02
- Re: Quick pcase question, Michael Heerdegen, 2016/03/02
- Re: Quick pcase question, Phillip Lord, 2016/03/02
- Re: Quick pcase question, Eric Abrahamsen, 2016/03/02
- Re: Quick pcase question, Stefan Monnier, 2016/03/02
- Re: Quick pcase question, Phillip Lord, 2016/03/02
- Re: Quick pcase question, Eric Abrahamsen, 2016/03/02