bug#23019: parse-partial-sexp doesn't output the full state needed for its continuance.

[Stefan Monnier]

> One concern I have is that there is code out there which compensates for
> the previous inadequate behaviour (I know there is in CC Mode), and it
> may be more difficult to switch off this compensation if there isn't an
> easy way to distinguish new from old, such as (> (length state) 10).

I'd be very surprised if other packages went to that trouble, but if
needed you can still distinguish the new from the old with something like:

   (defconst pps-is-new
     (let ((st (make-syntax-table)))
       (modify-syntax-entry ?/ ". 14" st)
       (with-temp-buffer
         (with-syntax-table st
           (insert "/")
           (nth 5 (parse-partial-sexp (point-min) (point-max)))))))


-- Stefan