I was using the libmoose-perl package of ubuntu 7.10. It turned out to be Moose 0.21.
I wouldn't have thought that they were that far behind, so I didn't check versions before.
Sorry, my fault. It works like a charm now with 0.40. Thanks for your help!

In reply to Re^2: Type Constraints in Moose by skirnir
in thread Type Constraints in Moose by skirnir

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