[Python-checkins] peps: Update 422 based on python-dev feedback

[Daniel Urban]

On Thu, Jun 7, 2012 at 9:47 PM, Terry Reedy <tjreedy at udel.edu> wrote:
> On 6/7/2012 11:45 AM, Daniel Urban wrote:
>>
>> On Thu, Jun 7, 2012 at 2:08 PM, nick.coghlan<python-checkins at python.org>
>>  wrote:
>>>
>>> -* If the metaclass hint refers to an instance of ``type``, then it is
>>> +* If the metaclass hint refers to a subclass of ``type``, then it is
>>>   considered as a candidate metaclass along with the metaclasses of all
>>> of
>>>   the parents of the class being defined. If a more appropriate metaclass
>>> is
>>>   found amongst the candidates, then it will be used instead of the one
>>
>>
>> I think here "instance" was correct (see
>> http://hg.python.org/cpython/file/default/Lib/types.py#l76 and
>> http://hg.python.org/cpython/file/cedc68440a67/Python/bltinmodule.c#l90).
>
>
> If so, then the behavior of the standard case of a type subclass is not
> obviously (to me) covered.

A subclass of type is also necessarily an instance of type, so that is
also covered by this case.


Daniel