无法在SwiftUI中推断泛型参数标签

struct ContentView: View {
    var body: some View {
        MyGenericView(item: "Hello, world!")
    }
}

struct MyGenericView<T>: View {
    var item: T

    var body: some View {
        Text("\(item)")
    }
}

struct ContentView: View {
    var body: some View {
        MyGenericView(item: "Hello, world!")
    }
}

struct MyGenericView<T>: View {
    var item: T

    init(item: T) {
        self.item = item
    }

    var body: some View {
        Text("\(item)")
    }
}

protocol MyGenericProtocol {
    associatedtype ItemType
    var item: ItemType { get }
}

struct ContentView: View {
    var body: some View {
        MyGenericView(item: "Hello, “world!")
    }
}

struct MyGenericView<T>: MyGenericProtocol where T == String {
    var item: T
}