The snippet bellow shows that the $l inside the embedded code of the regex is a closure. 

use Scalar::Util 'refaddr';

for my $l ('a'..'b') {
        print 'loop variable ', refaddr \$l;
        $l =~ /(?{ print refaddr(\$l) }) /x;
}

[download]

Here is the output: 

loop variable 135603848
135606104
loop variable 135606092
135606104

[download]

In reply to Re: Iterating over code embeded in regex by ioannis
in thread Iterating over code embeded in regex by eibwen

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