AnyView returned in functions with generic Views (SwiftUI)

Using Swift
,
1

Using a function like:

private func convertView<V: View>(view: V) -> some View {
        view
    }

returns AnyView instead of the generic View like Text
Why is that?

But:
Using a Wraper View like

struct Wrapper<V: View>: View {
        let view: V
        var body: some View { view }
    }

returns the generic View V via the body.

any idea @xedin ?

2

Can you provide a self-contained example of the behavior you're seeing? I cannot reproduce:

import SwiftUI

private func convertView<V: View>(_ view: V) -> some View {
  view
}
print(type(of: convertView(Text(verbatim: "Hello"))))
// prints "Text"
3

sure

struct ContentView: View {
    @State private var text = ""

    var body: some View {
        VStack(spacing: 40) {
            demonstratingAnyView
            demonstratingText
            Text(text)
        }
        .padding()
    }

    private var demonstratingAnyView: some View {
        VStack(spacing: 20) {
            Button("Read with convert (AnyView)") {
                readType(view: Text("Hello World"))
            }

            Button("Read without convert (Text)") {
                readType(view: Text("Hello World"), convert: false)
            }
        }
    }

    private var demonstratingText: some View {
        VStack {
            Button("Read via Wrapper SwiftUI") {
                text = String(describing: Wrapper(view: Text("Hello World")))
            }
        }
    }

    struct Wrapper<V: View>: View {
        let view: V
        var body: some View { view }
    }

    func readType<V: View>(view: V, convert: Bool = true) {
        if convert {
            let result = convertView(view: view)
            text = String(describing: result)
        } else {
            text = String(describing: view)
        }
    }

    private func convertView<V: View>(view: V) -> some View {
        view
    }
}
4

For me Swift Playgrounds (Swift 5.10 I believe) prints Text but Xcode 16.1 (Swift 6.0.2) prints AnyView.

UPDATE: But in Xcode 16.1 this actually only happen in debug build, release build prints Text as expected. I've found this: Any info on the _typeEraser attribute.

5

thanks! the link explains it!