Re: [Emacs-diffs] trunk r116779: Restore compatibility with legacy comment-start-skip values

[Dmitry Gutov]

On 17.03.2014 20:14, Stefan wrote:

> BTW, the new code still will fail to match the ";hello" comment in
>
>     foo\\;hello
>
> Maybe we should use narrow-to-region to get the ^ part of the regexp to
> match at point.

Yes, good point. Yet another handy `narrow-to-region' hack. :)

> > And suppose it doesn't, then what?
>
> Admittedly, I'm not sure how to handle the more general case where
> comment-start-skip uses sub-group 1 for something more significant than
> to rule out an escape char.

I can simply imagine a misconfigured mode where `comment-start-skip' 
doesn't ever match the start of a comment. So the question is, do we 
raise an error, simply don't move point, or do something like 
(skip-syntax-forward "-<")?

By the way, we might want to replace all the matching shenanigans with 
the last option.