Thanks for that. It looks like good guidance for future changes/implementations. None the less, I would like to understand why perl is behaving the way that it is.

BTW, it occurs to me that a reference to sub DESTROY is being added to the namespace of the package that uses Class::Std. Thus, in my test case, the sub isn't being invoked as Class::Std::DESTROY, but rather as MyClass::DESTROY. But it's the same code and I don't see how that would make any difference to whether the warning is issued or not.

In reply to Re^2: "used only once" warning from Class::Std by ig
in thread "used only once" warning from Class::Std by ig

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