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bug#4192: 23.1; special fontification for "//" in cc-mode

From: Lars Ingebrigtsen
Subject: bug#4192: 23.1; special fontification for "//" in cc-mode
Date: Mon, 29 Feb 2016 14:36:15 +1100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/25.1.50 (gnu/linux)

Alan Mackenzie <address@hidden> writes:

>> This is a feature request for cc-mode.
>> I work on a number of projects that use C89, not C99.  In these
>> projects, it is invalid to use "//"-style comment.  It would be nice if
>> cc-mode would optionally flag such comments in a special face, so that
>> I can immediately see when I've written a comment incorrectly.
> I'm not sure this is important enough to warrant a fully
> implemented/documented/QA'd feature, but then again, I'm not sure it's
> not.
> Here's a quick hack called c-disable-line-comments.el.  Load it into your
> Emacs before CC Mode (in particular, before desktop gets loaded).
> Toggling c-disable-line-comments doesn't work smoothly with the font
> locking, but I'm assuming here you'll not really be wanting to toggle
> this.

I think this sounds useful.  For instance, in the Emacs source code, //
is also frowned upon, so having those be marked by CC mode would be
handy.  This doesn't seem to have made its way into the code base, I

(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

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