On Thu, Feb 10, 2022 at 07:08:14PM -0500, Viktor Dukhovni
<postfix-us...@dukhovni.org> wrote:
>
>
> > On 10 Feb 2022, at 7:03 pm, raf <post...@raf.org> wrote:
> >
> > Thanks, but I'm not sure that that is material to this
> > issue.
>
> It is.
>
> > Even with regexp, x refers to "extended
> > expression syntax".
>
> Which is a converse to "basic expression syntax", i.e. the obsolete
> BRE syntax, in which "(" and "|" are ordinary characters unless escaped
> "\(" or "\|", there is no support for "{n}" multiplicity or "+" for one
> or more, ...
>
> > The extensions differ between
> > regexp and pcre, but not to the extent that it would
> > lead to that syntax error in that pattern (as far as
> > I can see).
>
> Again, you're mistaken. Check the regex API manpages.
>
> --
> Viktor.
Thanks. That explains it.
cheers,
raf
