He is using Inside-Out objects as described in http://www.perlfoundation.org/perl5/index.cgi?inside_out_object. But I also have no idea why that article used refaddr() instead of scalar()

In reply to Re^2: Calling a subroutine via multiple dereferences. by jethro
in thread Calling a subroutine via multiple dereferences. by Anonymous Monk

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