[swift-evolution] extension of AnyObject

[Kenny Leung]

Hi All.

I just discovered that you can’t write an extension on AnyObject. What’s the reasoning behind this?

I’m trying to write my own version of KeyValueObserving, and it would be really nice to be able to write

    self.observe(someObject, keyPath) {
        blah de blah
    }

from anywhere.

Thanks!

-Kenny