Is it allowed to inherit a property wrapper class?

Using Swift
1

Is it allowed to inherit a property wrapper class? Or should it be a final class?

@propertyWrapper
class Text<Value> {
    var wrappedValue: Value
    init(wrappedValue: Value) {
        self.wrappedValue = wrappedValue
    }
}

@propertyWrapper
class Text2<Value>: Text<Value> {
// this cannot compile
// Property wrapper type 'Text2' does not contain a non-static property named 'wrappedValue'
// Since Text2 inherits Text, it does have a property named 'wrappedValue'
}

// however this is OK.
@propertyWrapper
class Text2<Value>: Text<Value> {
    override var wrappedValue: Value {
        didSet {}
    }
}
2

Meet this issue too, can anybody check whether this is a bug or feature?

3

I would guess that it's due to the way the way the compiler checks if the type conforms to the property wrapper pseudo-protocol. It appears to only check the tagged type, and not any of its ancestors.