bug#69604: perl mode: quotes give wrong colors

bug#69604: perl mode: quotes give wrong colors

[Dan Jacobson]

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

bug#69604: perl-mode and cperl-mode: $\" in a double-quoted string

[Harald Jörg]

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.

bug#69604: perl-mode and cperl-mode: $\" in a double-quoted string

[Eli Zaretskii]

> From: Harald Jörg <haj@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?

bug#69604: perl-mode and cperl-mode: $\" in a double-quoted string

[Harald Jörg]

Eli Zaretskii <eliz@gnu.org> writes:

>> From: Harald Jörg <haj@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