Special descriptor for class __provides__
The descriptor caches the implementedBy info, so that
we can get declarations for objects without instance-specific
interfaces a bit quicker.
For example:
>>> from zope.interface import Interface
>>> class IFooFactory(Interface):
... pass
>>> class IFoo(Interface):
... pass
>>> class C(object):
... implements(IFoo)
... classProvides(IFooFactory)
>>> [i.getName() for i in C.__provides__]
['IFooFactory']
>>> [i.getName() for i in C().__provides__]
['IFoo']
- Overrides:
twisted.spread.pb.Avatar.__provides__
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