GNU bug report logs - #69604
perl mode: quotes give wrong colors

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

From: Dan Jacobson <jidanni <at> jidanni.org>
To: bug-gnu-emacs <at> gnu.org
Subject: perl mode: quotes give wrong colors
Date: Thu, 07 Mar 2024 16:53:08 +0800

$ cat r.pl
print "0$\"$_$/";
print "$_$\"0$/";
$ perl -c r.pl
r.pl syntax OK
$ emacs -Q r.pl
emacs-version "29.2"

Message #8 received at 69604 <at> debbugs.gnu.org (full text, mbox):

From: Harald Jörg <haj <at> posteo.de>
To: 69604 <at> debbugs.gnu.org
Subject: perl-mode and cperl-mode: $\" in a double-quoted string
Date: Fri, 08 Mar 2024 07:25:45 +0000

Good catch!  The same symptoms can be seen in cperl-mode.

Both perl-mode and cperl-mode treat "$" as quoting character in their
syntax tables.  This is needed for Perl's punctuation variables like $(
and $" which would otherwise be interpreted as unbalanced parens or
quotes.

In a string, this safety belt is not required, and it actually misfires
in the case of "$\"", which is part of the demo code.

This is now treated correctly in the Emacs master branch for both
perl-mode and cperl-mode.

Message #13 received at 69604 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Harald Jörg <haj <at> posteo.de>
Cc: 69604 <at> debbugs.gnu.org
Subject: Re: bug#69604: perl-mode and cperl-mode: $\" in a double-quoted string
Date: Fri, 08 Mar 2024 10:32:21 +0200

> From: Harald Jörg <haj <at> posteo.de>
> Date: Fri, 08 Mar 2024 07:25:45 +0000
> 
> Good catch!  The same symptoms can be seen in cperl-mode.
> 
> Both perl-mode and cperl-mode treat "$" as quoting character in their
> syntax tables.  This is needed for Perl's punctuation variables like $(
> and $" which would otherwise be interpreted as unbalanced parens or
> quotes.
> 
> In a string, this safety belt is not required, and it actually misfires
> in the case of "$\"", which is part of the demo code.
> 
> This is now treated correctly in the Emacs master branch for both
> perl-mode and cperl-mode.

Thanks.  Should this bug be closed now?

Message #16 received at 69604 <at> debbugs.gnu.org (full text, mbox):

From: Harald Jörg <haj <at> posteo.de>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 69604 <at> debbugs.gnu.org
Subject: Re: bug#69604: perl-mode and cperl-mode: $\" in a double-quoted string
Date: Fri, 08 Mar 2024 10:09:21 +0000

Eli Zaretskii <eliz <at> gnu.org> writes:

>> From: Harald Jörg <haj <at> posteo.de>
>> Date: Fri, 08 Mar 2024 07:25:45 +0000
>> 
>> Good catch!  The same symptoms can be seen in cperl-mode.
>> 
>> Both perl-mode and cperl-mode treat "$" as quoting character in their
>> syntax tables.  This is needed for Perl's punctuation variables like $(
>> and $" which would otherwise be interpreted as unbalanced parens or
>> quotes.
>> 
>> In a string, this safety belt is not required, and it actually misfires
>> in the case of "$\"", which is part of the demo code.
>> 
>> This is now treated correctly in the Emacs master branch for both
>> perl-mode and cperl-mode.
>
> Thanks.  Should this bug be closed now?

Yes!  I have closed it now.
-- 
Cheers,
haj

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