GNU bug report logs - #31350
27.0; `pcase' message: "Redundant pcase pattern"

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Package: emacs;

Reported by: Drew Adams <drew.adams <at> oracle.com>

Date: Thu, 3 May 2018 00:49:01 UTC

Severity: minor

Tags: fixed, moreinfo

Found in version 27.0

Fixed in version 28.1

Done: Lars Ingebrigtsen <larsi <at> gnus.org>

Bug is archived. No further changes may be made.

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Message #34 received at 31350 <at> debbugs.gnu.org (full text, mbox):

From: Drew Adams <drew.adams <at> oracle.com>
To: Lars Ingebrigtsen <larsi <at> gnus.org>, Michael Heerdegen
 <michael_heerdegen <at> web.de>
Cc: 31350 <at> debbugs.gnu.org
Subject: RE: bug#31350: 27.0; `pcase' message: "Redundant pcase pattern"
Date: Sun, 4 Oct 2020 10:45:54 -0700 (PDT)

> Perhaps the warning should be more explicit?  "Redundant pcase pattern"
> is obvious if you already know what it means, but if you don't, it's
> not.  :-)  So something like "pcase pattern shadowed by previous pcase
> pattern" or something along those lines?

That's a start.  But as I said:

  And even if a user (somehow) understands that later
  cases are made redundant by earlier ones, how to tell
  which earlier ones are implicated?

Just saying that some previous pcase pattern makes
this one redundant doesn't tell you which previous
pattern that does that.  It should.
This bug report was last modified 4 years and 222 days ago.

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