Hi all!
I am using regular expressions quite a lot.
But somthing I don't know, so far, is if there exists an
regexp matching anything which has equally many opening and closing
brackets, e.g.
(.(..)..(...(...))..)
Any idea
Thank You!
rembremading schrieb:
> Hi all!
>
> I am using regular expressions quite a lot.
> But somthing I don't know, so far, is if there exists an
> regexp matching anything which has equally many opening and closing
> brackets, e.g.
>
> (.(..)..(...(...))..)
>
> Any idea
>
> Thank You!
No, not in theory.
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Hi,
This is a german newsgroup, so I'll answer in german.
rembremading wrote:
> I am using regular expressions quite a lot.
> But somthing I don't know, so far, is if there exists an=20
> regexp matching anything which has equally many opening and closing
> brackets, e.g.
>=20
> (.(..)..(...(...))..)
Es gibt in perlre ein Beispiel, wie das mit p5 Regexes geht. (Relativ
weit unten, bei (?>...) ). Regulär sind diese Ausdrücke dann nicht me=
hr:
$re =3D qr{
\(
(?:
(?> [^()]+ ) # Non-parens without backtracking=
|
(??{ $re }) # Group with matching parens
)*
\)
}x;
HTH,
Moritz
--=20
Moritz Lenz
http://perl-6.de/ http://moritz.faui2k3.org/
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