GC is multithreaded, if RC is to be compatible, it should be multithreaded too, i...

1. What's bad about the implementation (haven't looked)?
2. Can we fix it?

That's an issue with the implementation not design.

-Alex

The compiler currently doesn't know about ownership, but you might have a non-owning...

Doesn't suffice ownership here? I mean you surely talk about owned manually allocated memory...

Look at the implementation?

How on earth are interfaces expensive?


-Alex

For shared, but not for nonshared?

You want synchronized RC?

...that supports GC and then make a RAII subclass from it.

There is also a...