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

[Dmitry Gutov]

On 14.02.2014 16:28, Eli Zaretskii wrote:
> Sorry, I'm not sure I understand the questions.  What do you mean by
> "adaptation of `syntax-ppss'"?

The introduction of a new hook Stefan suggested earlier.

> Information of region boundaries should surely come from the
> application level, but I wasn't talking about that.  I was talking
> about how this information is _used_.
>
> > I guess adapting the default font-lock-fontify-region function and
> > syntax-propertize to be aware of them would be good
>
> To be aware of what?

Of chunk boundaries.

> I never said the region(s) must be contiguous.  (Btw, explanation of
> why a given chunk needs to be aware of the previous chunk would be
> appreciated.)

Consider this ERB snippet:

<div class="<% @div_class %>-42">foofoofoo</div>

The class value string has to continue after the ruby chunk.

> My point is that we should come up with a list of the requirements,
> and then design and implement the infrastructure which will support
> them, instead of implementing multi-mode buffers by piggybacking
> existing infrastructure, which was never designed to support such
> features.

The need to "come up, design and implement" these things has been there 
for many years now. Unless things start moving in that direction 
step-by-step, I'm not confident anything "proper" will happen at all.