Subject: bug#21449: Emacs lisp mode: incorrect fontification of symbols containing escaped characters.

From: Alan Mackenzie <[email-masked]>
Date: Thu, 10 Sep 2015 10:44:34 +0000

Hello, Stefan.

On Wed, Sep 09, 2015 at 11:30:31PM -0400, Stefan Monnier wrote:
> > one too.  It feels like there really ought to be some major mode
> > dependent flag saying whether or not escaped characters are valid in
> > identifiers.  They are in Emacs lisp, but they're not in C.

> You mean like words-include-escapes?

Something like that, yes.

I don't think words-include-escapes is the right thing to use, though.
I think that doing M-f on "R\(A|B\)", one would want point to move to
just after the R, not just after the A; escaped characters should be
word separators, just like -s are; they should be thought of as \\s_
rather than \\sw.

Something like `identifiers-include-escapes', maybe?

>         Stefan

-- 
Alan Mackenzie (Nuremberg, Germany).