I don't think you will be able to do this in one step, you will probably have to do something like this:

if ( /^(\d+?)/ ) {
    my $len = $1;
    if ( /^$len(.{$len})/ ) {
        my $value = $1;
        # do something with $len and $value
    }
}

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We're not surrounded, we're in a target-rich environment!

In reply to Re: Backref in a regex quantifier by jasonk
in thread Backref in a regex quantifier by Anonymous Monk

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