For one possible implementation of your combine subroutine, consider:

use Regexp::Assemble;
sub combine {
    my $str = Regexp::Assemble->new->add(@_)->as_string;
    qr/($str)/;
}

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- another intruder with the mooring in the heart of the Perl

In reply to Re^3: Regex Subexpressions by grinder
in thread Regex Subexpressions by BenjiSmith

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