Get "self" of protocol with associated type-CodePudding

I have the following protocol:

protocol ViewCreator {

  associatedtype ResultView: View

  @ViewBuilder func createView() -> ResultView

}

and I want to get its type, for example to get its name. So I wrote the following code:

let typeName = String(describing: ViewCreator.self)

but got the following error:

Protocol 'ViewCreator' can only be used as a generic constraint because it has Self or associated type requirements.

In this case how can I get "self" of the protocol with the associated type?

P.S. I don't have an implementation of this protocol in scope.

CodePudding user response：

It is no different than when not using an associated type.

(any ViewCreator).self

String(describing: (any ViewCreator).self) // "ViewCreator"

In the future, you may have the option to use primary associated types to provide restrictions. But for now, this will compile and execute, but be considered <<< invalid type >>>.

protocol ViewCreator<ResultView> {

(any ViewCreator<EmptyView>).self

CodePudding user response：

You need to have an implementation of the protocol in the same scope your protocol is in and then use .self on that implementation.