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From: Stefan Monnier via "Bug reports for GNU Emacs, the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
To: Marco Antoniotti <marcoxa@gmail.com>
Cc: Bruno Barbier <brubar.cs@gmail.com>, 70597@debbugs.gnu.org
Subject: bug#70597: Problem in pcase-let?
Date: Sun, 28 Apr 2024 11:22:37 -0400	[thread overview]
Message-ID: <jwvwmohikiw.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: <CAKmY7cXKs_AE_2yBt9CcV7tTkeT4bz0oYFBcadjCfk90b2H00w@mail.gmail.com> (Marco Antoniotti's message of "Sun, 28 Apr 2024 00:28:41 +0200")

> Pattern matchers do ... pattern matching.

`pcase` is a pattern matcher.
`pcase-let` is not: it performs "destructuring bindings".

If you want to test if a pattern matches, then you want to use `pcase`
or `pcase-exhaustive`, and not `pcase-let`.

If you want a "one-branch `pcase-exhaustive` with a let-style notation",
we could add such a thing of course, but I'd first like to see some
evidence that it's useful in practice.


        Stefan






  parent reply	other threads:[~2024-04-28 15:22 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-04-26 18:00 bug#70597: Problem in pcase-let? Marco Antoniotti
2024-04-27 16:11 ` Bruno Barbier
2024-04-27 22:28   ` Marco Antoniotti
2024-04-28 10:01     ` Bruno Barbier
2024-04-28 10:07       ` Ihor Radchenko
2024-04-28 10:18         ` Eli Zaretskii
2024-04-28 15:22     ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors [this message]
2024-04-28 15:38       ` Marco Antoniotti
2024-04-28 17:05         ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-04-28 18:22           ` Marco Antoniotti
2024-04-28 21:08             ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-05-02  9:23               ` Eli Zaretskii
2024-05-02 11:06                 ` Marco Antoniotti
2024-05-04 11:35                   ` Eli Zaretskii
2024-05-04 12:06                     ` Marco Antoniotti
2024-05-04 15:05                       ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-05-05  8:49                         ` Marco Antoniotti
2024-05-04 15:23               ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors

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