See %+ and %-; the following prints "oo":
use warnings;
use strict;
'foo' =~ /(?'name'(?=o)(\w+))(?{print $+{name}})/;
But also note the documentation of (?{...}):
WARNING: Using this feature safely requires that you understand its limitations. Code executed that has side effects may not perform identically from version to version due to the effect of future optimisations in the regex engine. For more information on this, see Embedded Code Execution Frequency.
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Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
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Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
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intervention).
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or How to display code and escape characters
are good places to start.
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