GNU bug report logs - #24299
perl-mode: mismatched parenthesis message

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: 積丹尼 Dan Jacobson <jidanni <at> jidanni.org>
To: bug-gnu-emacs <bug-gnu-emacs <at> gnu.org>
Subject: perl-mode: mismatched parenthesis message
Date: Wed, 24 Aug 2016 20:27:57 +0800

All I know is when inserting the final ], a mismatched parenthesis /
no matching parenthesis found message appeared in the minibuffer
(depending on the code above it. Anyways, both wrong.)

$visit{$visit_id}{name} = $1         if #m!href="/users/(\d+)/profile">([^<]+)!;
     /<img alt="Photo of ([^"]+)/;

Furthermore, that message should be recorded in the C-h e list.

emacs-version "24.5.1"

Message #8 received at 24299 <at> debbugs.gnu.org (full text, mbox):

From: Stefan Kangas <stefan <at> marxist.se>
To: 積丹尼 Dan Jacobson <jidanni <at> jidanni.org>
Cc: 24299 <at> debbugs.gnu.org
Subject: Re: bug#24299: perl-mode: mismatched parenthesis message
Date: Sat, 6 Jul 2019 06:00:22 +0200

積丹尼 Dan Jacobson <jidanni <at> jidanni.org> writes:

> All I know is when inserting the final ], a mismatched parenthesis /
> no matching parenthesis found message appeared in the minibuffer
> (depending on the code above it. Anyways, both wrong.)
>
> $visit{$visit_id}{name} = $1         if #m!href="/users/(\d+)/profile">([^<]+)!;
>      /<img alt="Photo of ([^"]+)/;

I can reproduce this on Emacs 26.2, but I see this also without the
first line.

In other words, under "emacs -Q" and M-x perl-mode, when I type:

/<img alt="Photo of ([^"

And then type the final "]", I get the message "No matching parenthesis
found".

> Furthermore, that message should be recorded in the C-h e list.

I'm not sure -- should it?

> emacs-version "24.5.1"

Thanks,
Stefan Kangas

Message #17 received at 24299 <at> debbugs.gnu.org (full text, mbox):

From: haj <at> posteo.de (Harald Jörg)
To: 24299 <at> debbugs.gnu.org
Subject: Can we just drop the noise from blink-matching-paren?
Date: Wed, 23 Jun 2021 15:59:00 +0000

The misleading messages are caused by blink-matching-open which is
confused by the quotation mark within the regexp.  There are various
ways to trigger the message in perl-mode (and cperl-mode).  For example,
the closing paren in this line triggers the same message:

  my $text = "(')";

Modes like text-mode also get the noise when you enter a plain old
smiley like :-) or old-fashioned numbered lists like a), b), ...

Can we just drop these messages from blink-matching-open altogether?  I
know that this is a global change in behavior, but in my opinion the
value of the message for the user isn't that great.
-- 
Cheers,
haj

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