Re: regexp in 5.005_61: (?{...})

"Konovalov, Vadim" <vkonovalov@lucent.com> wrote
> While ramblering in Perl's regexp source I've noticed that (?{...})
> construction is parsed in regcomp.c in too simplified way.

> perl -e '/(?{print "Hello{"})/'
> explains:
> Sequence (?{...}) not terminated or not {}-balanced at -e line 1, within pattern
> /(?{print "Hello{"})/: Sequence (?{...}) not terminated or not {}-balanced at -e line 1.

It's interesting that in other analogous cases, Perl gets this right.
For example

         perl -we '@{"{"} = (1..3);print qq(@{"{"}\n)'

prints

         1 2 3

So I'd call this a bug.

But you can circumvent it with an escape:

         perl -e '/(?{print "Hello\{"})/'
         Hello{


Mike Guy

• regexp in 5.005_61: (?{...}) by Konovalov, Vadim
• Re: regexp in 5.005_61: (?{...}) by M.J.T. Guy
• RE: regexp in 5.005_61: (?{...}) by Konovalov, Vadim
• Re: regexp in 5.005_61: (?{...}) by Ilya Zakharevich