[Zope-dev] Adding a _frame argument to InterfaceClass.__init__ to make it subclassable

[Laurence Rowe]

Hi,

I'd like to apply the attached patch to zope.interface trunk to make
it more easily subclassable without having to copy and paste a chunk
of its __init__ into the subclass' __init__.

Motivating factor is: I need an Interface with a hook that gets called
after InterfaceClass.__init__ to allow for:

* Checking that field names supplied as tagged values from directives
correspond to actual field names to detect typos.
* Registering the Interface instance for further configuration to be
executed by a zope.configuration action.

(Subclass is http://dev.plone.org/plone/browser/plone.supermodel/branches/elro-directives/plone/supermodel/model.py#L52)

Laurence
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