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bug#997: perl mode blows "'" etc.
From: |
Stefan Kangas |
Subject: |
bug#997: perl mode blows "'" etc. |
Date: |
Sat, 29 Feb 2020 03:58:35 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/26.1 (gnu/linux) |
title 997 Incorrect perl-mode syntax highlighting in some cases (e.g. using "'")
tags 997 confirmed
found 997 28.0.50
thanks
jidanni@jidanni.org writes:
> Perl mode screws up bad with this file. Cperl mode gets it better.
> $ perl -c p.pl
> p.pl syntax OK
> $ cat p.pl
> /this is a perl program to demonstrate emacs's wacky color biz/;
> /this line is in the wrong color until here'/; #///
I can reproduce this on current master (28.0.50).
Open a file like this using perl-mode under emacs -Q to see the
incorrect highlighting:
/correct 'incorrect/;
/incorrect' correct/;
The problem goes away if the file looks like this instead:
$foo =~ /foobar/;
/correct 'incorrect/;
/incorrect 'correct/;
> /\b.*\bpic(ture)?s\b/;
> /this line is in the wrong color/;
> #this comment turns back on emacs correct color: \b\b
> /this line is in the right color/;
> /but not this line until the end\/;/m;
I see some incorrect highlighting in this example too. Adding the
"$foo =~ /foobar/;" line from above seems to fix it here too.
> $ emacs -Q p.pl
> Anyway, one usually ends up having to stick in special comments with
> some / ; ` ' etc. in them lest large tracts of code become the wrong
> color. emacs-version "22.2.1"
I tried inserting the problematic lines into a larger Perl file, but I
couldn't reproduce the issue. I'm not sure if that means that the
incorrect coloring only happens when these lines are inserted at the
very beginning of a file.
Best regards,
Stefan Kangas
- bug#997: perl mode blows "'" etc.,
Stefan Kangas <=