Why use (ref($_[0]) || $_[0]) in one place and __PACKAGE__ in the other? 
sub new {
   my $class = (ref($_[0]) || $_[0]);
   my $self = bless {}, $class;
   tie %$self, $class;
   $self
}

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In reply to Re: Blessing into the same package in class (object) and tie contexts by ikegami
in thread Blessing into the same package in class (object) and tie contexts by ryangies

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