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
> regexp matching anything which has equally many opening and closing
> brackets, e.g.
>
> (.(..)..(...(...))..)

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


--
Moritz Lenz
http://perl-6.de/ http://moritz.faui2k3.org/


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