[swift-evolution] Type based reference cycle detection

[Darko Damjanovic]

> The key phrase here is “simple form”. We need to translate this into code at
> some point, no?

With „simple form“ I really mean the simplest possible form:

    class A {
       	var myB: B?
    }

    class B {
        var myA: A?
    }

So exactly class A and exactly class B. If I understand it correct then the detection of inherited or derived types (or Protocols) would only be possible during runtime.

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