[Zope3-dev] Multi Interface Types Registration

[Jim Fulton]

Dominik Huber wrote:
> Hi Stephan,
> 
> Is there a specific reason why only one interface type is directly 
> provided per interface?
> If two types are registered for one interface the first type is chucked 
> out of the interface during the registration of the second,
> but the first stays still registered within the utitlity service.
> Bug or Feature?
> 
> IMO multi-typed interfaces would make sense. Would you have any 
> objections if I change the code the following way:
> 
> module: zope.app.component.interface.py, line 78
> 75    if iface_type is not None:
> 76        if not iface_type.extends(IInterface):
> 77            raise TypeError(iface_type, "is not an interface type")
> 78        directlyProvides(interface, iface_type, 
> directlyProvidedBy(interface))

+1

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