Re: [pcre-dev] Problem with (?| group

On Fri, 9 Oct 2009, ND wrote:

> subject: boy
> pattern: (?|(a)|b(?&tt))(?(DEFINE)(?<tt>.))
> Result: no match
>
> Why there is no match? I waits result: 'bo'
> I think there is a bug.

Which version of PCRE are you using? This works in 7.9 and the
forthcoming 8.00:

PCRE version 7.9 2009-04-11

re> /(?|(a)|b(?&tt))(?(DEFINE)(?<tt>.))/
data> boy
0: bo
1: <unset>
2: <unset>
data>


PCRE version 8.00-RC1 2009-10-05

re> /(?|(a)|b(?&tt))(?(DEFINE)(?<tt>.))/
data> boy
0: bo
data>


This is compatible with Perl 5.10:

Perl 5.010001 Regular Expressions

re> /(?|(a)|b(?&tt))(?(DEFINE)(?<tt>.))/
data> boy
0: bo
data>


Philip

--
Philip Hazel