Re: [Emacs-diffs] master 938d252 4/4: Make regex matching reentrant; update syntax during match

[Perry E. Metzger]

On Tue, 19 Jun 2018 07:48:28 -0700 Daniel Colascione
<address@hidden> wrote:
> If we did want to adopt TRE, we'd have to add supports for
> PCRE-like callouts for implementing Emacs-specific assertions.
> (PCRE itself has the opposite problem: explicit support for
> pluggable callouts, but no support for an iterator API.)

Probably.

> I'd also like to better understand the specific remaining
> differences between POSIX regular expression semantics and what TRE
> implements, whether this difference is intentional or not.

The documentation is, I think, pretty good on this.

> And I'd also like to understand how we can give the engine
> Emacs-regex semantics instead of POSIX ones. (Very few people use
> the POSIX mode of Emacs regex matching.)
>
> I'm also not sure how copyright assignment would work for
> abandonware.

I don't think we could get a copyright assignment. It would have to be
maintained as a separate package that Emacs depended on.

Perry
-- 
Perry E. Metzger                address@hidden