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Re: address@hidden: C++-mode: Syntax highlighting: wrong color for funct

From: Stefan Monnier
Subject: Re: address@hidden: C++-mode: Syntax highlighting: wrong color for function identifier depending on the kind of whitespace that follows]
Date: Wed, 09 Mar 2005 17:35:23 -0500
User-agent: Gnus/5.11 (Gnus v5.11) Emacs/22.0.50 (gnu/linux)

> [The discussion is about a font-locking problem reported in CC Mode:  The
> user types the start of a C function, but puts a NL in the middle:

> void function
>                         (int x);

> The second line gets incorrectly fontified, because in its
> after-change-functions, font-lock considers only that line in and of
> itself.]


> However:  I did complain about this shortcoming of font-lock on
> gnu.emacs.bug way back, on Friday 10th May 2002 (Subject: Font-lock:
> Major mode should be able to specify region to fontify.  Message-Id:
> <address@hidden>), and that post of mine contained a patch to add
> the facility to font-lock.  Nobody apart from Kim Storm (who objected
> (quite reasonably) to the prolix function names I'd used) responded to
> the post at the time, and nothing happened.  That's when I decided that
> advising font-lock was the least bad way of solving the problem. 

Hmm... I can't remember such a post and I have a hard time imagining why
I wouldn't have jumped on it.

Could you explain smoe more about your two cases (the one in awk and the
one in the subject of this article):
- how do they use your new before-font-lock-after-change-function hook?
- why can't they use the font-lock-multiline property?
- why can't they use the jit-lock-defer-multiline property?

This will allow us the better judge which is the better course of action.
Using advice on font-lock functions from awk-mode is pretty ugly, so it's
important we come up with a better way to solve this issue.


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