Re: Re: reasonable syntax for multi-adaptation

On Sep 26, 2007, at 3:00 PM, Dieter Maurer wrote:

> Jim Fulton wrote at 2007-9-26 11:29 -0400:
>> ...
>>>     IFoo(x)
>>>     IBar(multi=(x,y))
>>
>> Actually, that is not the case.  If x already provides IFoo, then in
>> the first case, the existing object is retuned. Nothing is
>> instantiated.  OTOH, in:
>>
>>   getMultiAdapter([x], IFoo)
>>
>> or
>>   getAdapter(x, IFoo)
>>
>> either there is an error or some factory will be called.  x won't be
>> returned unless the factory happens to return it.
>
> Is this not an irrelevant implementation detail?

No, the specified behavior is different.

Jim

--
Jim Fulton
Zope Corporation