* Francis Galiegue <fg@one2team.com> [2008-11-10 08:55]:
quoted text
> Le Monday 10 November 2008 01:38:30 Ian Hilt, vous avez écrit :
> > On Sun, 9 Nov 2008, Junio C Hamano wrote:
> > > Ian Hilt <ian.hilt@gmx.com> writes:
> > > > On Sun, 9 Nov 2008, Francis Galiegue wrote:
> > > >> Le Sunday 09 November 2008 13:59:48 Ian Hilt, vous avez écrit :
> > > >> > +	if ($c_file =~ /^To:\s*+(.+)\s*\nCc:/ism) {
> > > >>
> > > >> Greedy operators are only supported with perl 5.10 or more... I think
> > > >> it's a bad idea to use them...

Possessive quantification is supported in much earlier versions
of Perl, it’s just more awkward syntactically:

    /^To:(?>\s*)(.+)\s*\nCc:/ism

But possessification is not going to make a difference in this
regex, since .+ can match anything that \s* can also match, so
the only difference is that if the regex does happen to
backtrack, it will backtrack over all the spaces after the To:
at once instead of one at a time.

I have only just subscribed so I do not have enough context to
know what the problem is, but based on what I have seen so far it
seems to me that all you want is simply

    /^To:\s?(.+)\s*\nCc:/ism

although I have to wonder if the /s modifier here is really what
you want.

quoted text
> I think the correct term for *+, ++, ?+ etc is "possessive"
> quantifiers, I'm just not sure.

That is correct.

Regards,
-- 
Aristotle Pagaltzis // <http://plasmasturm.org/>
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