Swift-将参数从非泛型函数传递给泛型函数

Question

So here is my playground, i would love to use the openInitial111() function but it just wont compile, the openInitial222() is working perfectly, whats the problem ?

protocol Module : Screen {
   init()
}
extension Module {
   static func entity() -> Self {
      return Self()
   }
}
protocol Screen {

}
class FFF: Module {
   required init() {
   }
}
class ZZZ: NSObject {
    func openInitial111(initialModule: Module.Type) {
        self.openViewController(itemWithScreenStyle: initialModule.entity())  // Error : Cannot invoke openViewController
                                                                          //with an argument list of type '(initWithScreenStyle:Module)
    }

    func openInitial222(initialModule: Module.Type) {
       let f = FFF.self  // FFF.Type
       self.openViewController(itemWithScreenStyle: f.entity())  // works
    }


    func openViewController<T: Screen>(itemWithScreenStyle: T) {
        print("generics")
    }
}

Answer 1

Indeed as suggested in comments the underlaying issue is that protocol doesn't conform to protocol. The error message is incredibly misleading though.