Yes, most of it :)

We haven't implemented points 2 and 3, yet.

I'm in no hurry to implement 3. It would clean up `gen.throw` a lot, and break the dependency between that code and the interpreter, but it isn't urgent.

2 is more urgent. I think we need it to allow specialization of `FOR_ITER` for generators, so it should happen in the next few weeks.