Re: Musings: Supposed places of safety, guaranteed by parse-partial-sexp are not safe.

[Stefan Monnier]

> There's a problem with parse-partial-sexp.  If one scans to the middle
> of a comment opener  /*
>                       ^
>                       |
> , parse-partial-sexp gives no indication that we might be half inside a
[...]
> No doubt there is some record of this state hidden away in (nth 9 state).

IIRC you're just a bit too optimistic: parse-partial-sexp does not
record this info anywhere.  And yes, if my recollection is right, that
means it's got a bug.

The better way to fix it is probably to change the (nth 5 ppss) value so
it holds something like "buffer position actually described by PPSS in
case the requested buffer position is in the middle of a lexeme" and
so it can be used for both backslashes and multi-char comment markers.


        Stefan