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emacs24: cperl-mode and which-function-mode oddity
From: |
Frank Terbeck |
Subject: |
emacs24: cperl-mode and which-function-mode oddity |
Date: |
Fri, 08 Apr 2011 13:12:46 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/23.2 (gnu/linux) |
Hey there.
I'm encountering odd behaviour when using `which-function-mode' with
`cperl-mode' in emacs version 24. It's a fairly recent development
build:
% emacs --version
GNU Emacs 24.0.50.1
[...]
Consider these two files:
foo.el:
[snip]
(mapc
(lambda (pair)
(if (eq (cdr pair) 'perl-mode)
(setcdr pair 'cperl-mode)))
(append auto-mode-alist interpreter-mode-alist))
(which-function-mode t)
[snap]
And foo.pl:
[snip]
$foo = qq{I'm just another Perl Hacker.};
[snap]
Now, I'd start emacs like this:
% emacs -nw -Q
...and then:
M-x load-file RET foo.el RET
C-x C-f foo.pl RET
Now font locking is screwed up. The "qq" is highlighted as
`cperl-nonoverridable-face', which is correct. But "{I" shows up in
`default'. Which is wrong. Now, the ' looks like the start of a string
and it's highlighted as `font-lock-string-face'. But because the "q{"
isn't the start of the string but the single quote, the closing "}"
doesn't end the string and so the ";" (and in fact, any following lines
would be too, until another single quote would be encountered) is
highlighted in `font-lock-string-face', as well.
When I'm removing the "(which-function-mode t)" line from "foo.el", the
problem goes away.
I've been browsing emacs' BTS for a while, but AFAICS this wasn't
reported yet. My question is if anybody is seeing this, too. And by
extension, whether `which-function-mode' is supposed to work with
`cperl-mode', in which case I'd "M-x report-emacs-bug" it.
Regards, Frank
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