Hi everyone, I noticed strange behaviour of the Swift 4.0.3 compiler regarding class and subtype existentials.
According to the proposal SE-0156 (https://github.com/apple/swift-evolution/blob/master/proposals/0156-subclass-existentials.md), multiple class types in protocol compositions should be allowed, if: * The class types are the same * Or, one class type must be a subtype of the other. However, when copying the exact code from the proposal into Xcode 9.2, the result is the following: [cid:image001.png@01D36F76.E9815E30] My conclusion here is that the compiler does not allow multiple class types in one protocol composition. My question is: Is this behaviour intended or should I open a bug report? Thank you very much BR Mario
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