Example.swift

struct List : View {

    var body: some View {
        NavigationView {
            List(viewModel.superHeroes.identified(by: \.name)) { value in
                SwitchValue(value) {
                    CaseType(is: SuperHero.self) { superHero in
                        Text(superHero.name)
                    }
                    CaseType(is: Avenger.self) { avenger in
                        Text(avenger.name).color(.red).bold()
                    }
                }
            }
            .navigationBarTitle(Text("Kata Super Heroes"))
        }
    }
}

ViewByTypeSelector.swift

@_functionBuilder
class ViewByTypeBuilder {
    public static func buildBlock(_ viewByType: CaseType<Any, AnyView>) ->  [String: (Any) -> AnyView] {
        return [viewByType.type: viewByType.content]
    }
    public static func buildBlock(_ viewByType: CaseType<Any, AnyView>, _ viewByType2: CaseType<Any, AnyView>) ->  [String: (Any) -> AnyView] {
        return [viewByType.type: viewByType.content, viewByType2.type: viewByType2.content]
    }
}

struct CaseType<Value, Content: View> {
    let type: String
    let content: (Any) -> AnyView

    init<Value, Content: View>(is: Value.Type, @ViewBuilder builder:  @escaping (Value) -> Content) {
        self.type = "\(`is`)"
        self.content = { (value: Any) -> AnyView in
            AnyView(builder(value as! Value))
        }
    }
}

struct SwitchValue: View {

    private let value: Any
    private let bindings: [String: (Any) -> AnyView]

    init(_ value: Any, @ViewByTypeBuilder builder: () -> [String: (Any) -> AnyView]) {
        self.value = value
        self.bindings = builder()
    }

    var body: some View {
        let typeKey = "\(type(of: value))"
        return self.bindings[typeKey]!(value)
    }
}