In that example you're not actually sharing the data: you're creating a new hash every time data() is called. If you really want to share the data, you can do: 

my $data = { one => 1, two => 2 }; 
sub data { return $data; }

[download]

I don't know how you'd use tie() to get the original code to work. If you really want that construct, you'll need to use symbolic references or - even more dangerous - eval.

Also note that even if it would work as you expected, the original code will break as soon as someone subclasses Child.

update: in the example you posted here, there's no need to do 

my $proto = ref $self;
print $proto->data;

[download]
You can just call 
print $self->data;

[download]
"What should it profit a man, if he should win a flame war, yet lose his cool?"

In reply to Re^3: displaying package variable from inherited method. by Joost
in thread displaying package variable from inherited method. by wazoox

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