Actually, it does provide for everything the OP asked for. You just have to drink a little more Koolaid. Class::MOP doesn't provide much outside of sugar. But, Moose does. Using 'extends', you can safely subclass. It doesn't guarantee much (yet) in the way subclassing non-Moose stuff, but we're only on 0.03_02 - lots more to go. :-)
My criteria for good software:
  1. Does it work?
  2. Can someone else come in, make a change, and be reasonably certain no bugs were introduced?

In reply to Re^3: Perl 5 OOP solutions by dragonchild
in thread Perl 5 OOP solutions by tomazos

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