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bug#3269: 23.0.93; C-mode text highlighting
From: |
Alan Mackenzie |
Subject: |
bug#3269: 23.0.93; C-mode text highlighting |
Date: |
Thu, 14 May 2009 21:39:24 +0000 |
User-agent: |
Mutt/1.5.9i |
On Wed, May 13, 2009 at 08:39:47AM +0200, Thomas Christensen wrote:
> In c-mode type:
> #define FOO "\
> foo\n\
> bar\n\
> "
> Then place the cursor after foo\n\ and press RETURN for a new line.
> The highlighting is now broken, and I can only restore it by reverting
> the buffer.
That's a bit vague, so let me fill it out for you. ;-)
When you press RETURN as described, the new line you've just made lacks a
backslash, hence terminates the macro. (Yes, I know you knew that.)
#define FOO "\
foo\n\
bar\n\
"
The "foo" line has lost its fontification, and this is the bug. I know
what's causing it, and it _might_ be easily fixable. What's more, I
don't this bug was in Emacs 22, so Chong Yidong would allow it to be
fixed. :-)
The "bar" line and what follows (which is no longer part of the macro)
is so remote from being valid C syntax that no compaint about its
fontification is reasonable.
If you insert a backslash in the blank line, the bottom bit becomes
correctly fontified again. The top bit needs you to type M-o M-o, as
Andreas said, to restore its colour. This is because font lock, when
triggered by a buffer change, only refontifies the current line and those
below it. This is a longstanding problem with font lock which is
difficult (though not impossible) to fix.
Thanks for taking the trouble to report this bug.
--
Alan Mackenzie (Nuremberg, Germany).
- bug#3269: 23.0.93; C-mode text highlighting, Thomas Christensen, 2009/05/14
- bug#3269: 23.0.93; C-mode text highlighting, Andreas Schwab, 2009/05/14
- bug#3269: 23.0.93; C-mode text highlighting,
Alan Mackenzie <=
- bug#3269: 23.0.93; C-mode text highlighting, Alan Mackenzie, 2009/05/18
- bug#3269: 23.0.93; C-mode text highlighting, Stefan Monnier, 2009/05/18
- bug#3269: 23.0.93; C-mode text highlighting, Alan Mackenzie, 2009/05/18
- bug#3269: 23.0.93; C-mode text highlighting, Stefan Monnier, 2009/05/18
- bug#3269: 23.0.93; C-mode text highlighting, Alan Mackenzie, 2009/05/19
- bug#3269: 23.0.93; C-mode text highlighting, Stefan Monnier, 2009/05/19
- bug#3269: 23.0.93; C-mode text highlighting, Alan Mackenzie, 2009/05/19