At 05:38 PM 4/30/2007 -0700, Guido van Rossum wrote:
>Of course, once the core language adds built-in support for such a
>feature, it becomes slightly less advanced, and it is reasonable to
>expect that the special functionality be provided by object or type or
>some other aspect of the standard class definition machinery (maybe
>even a default decorator that's always invoked).
Yep. That's precisely it. I'm suggesting that since GF's, enhanced
super(), and even potentially @abstractmethod have a use for such a hook,
that this would be an appropriate hook to provide in object or type or
whatever. Or, have the MAKE_CLASS opcode just do something like:
...
cls = mcls(name, bases, prepared_dict)
for decorator in cls.__decorators__:
cls = decorator(cls)
...
Heck, I'd settle for:
...
cls = mcls(name, bases, prepared_dict)
for callback in cls.__decorators__:
callback(cls)
...
As this version would still handle all of my use cases; it just wouldn't be
as useful for things like @abstractmethod that really do want to change the
metaclass or bases rather than simply be notified of what the class is.
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