Yes. The stringification of a Regexp object goes through the magic system. The mg_obj member is how a Regexp object points to the internal representation of itself (the regexp struct).
Jeff japhy Pinyan, P.L., P.M., P.O.D, X.S.: Perl, regex, and perl hacker
How can we ever be the sold short or the cheated, we who for every service have long ago been overpaid? ~~ Meister Eckhart

In reply to Re^5: Internal representation of qr// compiled regular expressions by japhy
in thread Internal representation of qr// compiled regular expressions by John M. Dlugosz

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