The only one of those I am not sure about is the natural hierarchy/inheritance one. The big problem is the LSP and often data that seems to follow a natural hierarchy (a square is a rectangle) in fact violates the LSP.

Inheritance is powerful but it is also very difficult to get right. On the other hand, one thing I really like about Moose is the fact that the roles and delegation systems provides a useful alternative to inheritance where what you really want to offer is a consistent interface.

In reply to Re^2: When to Use Object Oriented approach in Perl? (RFC) by einhverfr
in thread When to Use Object Oriented approach in Perl? (RFC) by thanos1983

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