Re: /srv/bzr/emacs/trunk r101338: * lisp/emacs-lisp/syntax.el (syntax-ppss): More sanity check to catch

[Eli Zaretskii]

> From: David Kastrup <address@hidden>
> Date: Fri, 14 Feb 2014 10:54:49 +0100
> 
> It's not like there isn't use for it: flex and bison files
> (pattern/action) are multiple mode on a large scale, and even
> address/action languages like sed and awk have facets of multiple modes.

I agree that being able to support portions of a buffer that specify
their own major mode is an important feature.  I'm just saying that we
need a suitable infrastructure for that, instead of trying to exploit
unrelated features, which seem like "a good idea".

> Emacs can use text properties to switch syntax tables or categories or
> even keymaps in mid-buffer.  Maybe switching the whole mode would be
> feasible in a similar manner.

Yes, something like that.  Basically, somehow present to major-mode
features only a portion of the buffer (e.g., by narrowing internally).