On Mon, 10 Nov 2008, Junio C Hamano wrote:
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> Ian Hilt <ian.hilt@gmx.com> writes:
>=20
> > On Sun, 9 Nov 2008, Junio C Hamano wrote:
> >> Ian Hilt <ian.hilt@gmx.com> writes:
> >>=20
> >> > On Sun, 9 Nov 2008, Francis Galiegue wrote:
> >> >> Le Sunday 09 November 2008 13:59:48 Ian Hilt, vous avez =C3=A9crit=
=C2=A0:
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> >> >> > +=09if ($c_file =3D~ /^To:\s*+(.+)\s*\nCc:/ism) {
> >> >>=20
> >> >> Greedy operators are only supported with perl 5.10 or more... I thi=
nk it's a=20
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> >> >> bad idea to use them...
> >> ...
> >> You expect something non-blank there anyway, so why not do:
> >>=20
> >> =09To:\s*(\S.*?)\s*\n....
> >
> > That works.  Although, I seem to be missing Francis' point.  According
> > to perlre, a quantified subpattern is "greedy".  So a "greedy operator"
> > is any one of the standard quantified subpatterns.  The "+" and "?"
> > modify its matching behavior.  And it seems to me that it _has_ to use =
a
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> > q.s. to work ...
>=20
> The "perlre" documentation you are reading is from Perl 5.10.0; check
> "perldelta" documentation next to it.
>=20
> I think you are wrong in saying that "it _has_ to use".  Yes, you _can_
> use possessive quantifiers to write that pattern (provided if you can
> limit your users to Perl 5.10.0 or later), but you do _not_ have to (and =
I
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> just showed you how).  By not using the new feature, you can make it work
> for people with older version of Perl.

Right.  I was saying it has to use quantifiers, in general, not that it
has to use possessive quantifiers.