Hi Alan,

On 9/17/17 1:29 PM, Alan Mackenzie wrote:

> I don't know anything about these things.  But seeing as how syntax.el is
> preloaded, the definition of structs would need to be preloaded earlier.

OK, let's do without that for now. The result doesn't look too bad to my 
eyes, at least.

>>>> Would you like to see the code?
> 
>>> Yes, why not?
> 
>> Please give me until the end of the week.
> 
> The end of the week has arrived.  Are you still intending to propose an
> alternative formulation of the new cache manipulation for syntax-ppss?

Thanks for the reminder. The patch is attached. I've tested it 
minimally, any feedback is welcome.

(It reads much better in Emacs with diff-auto-refine-mode).