Swift 3: The difference between Public and Internal access modifiers?

Question

I read the Apple\'s reference about access modifiers in Swift 3. I read also about the same on stackoverflow but I didn\'t get an answer as the person who asked. As I unders

Answer 1

Your diagram is just incorrect.

Public members of A.swift and B.swift are available to C.swift and D.swift. The only restriction is that classes can't be subclassed (they would need to be open.