StringInterpolation inside SwiftUI

Anyone able to get custom StringInterpolations to work inside SwiftUI Text view?

extension String.StringInterpolation {
    mutating func appendInterpolation(justDate value: Date) {
        let formatter = DateFormatter()
        formatter.dateFormat = "yyyy-MM-dd"
        let dateString = formatter.string(from: value)
        appendLiteral(dateString)
    }
}


struct MyView: View {
    
    var body: some View {
        Text("Now: \(justDate: Date())"}) // Doesn't work
    }
    
    func test() {
        print("Now: \(justDate: Date())") // Works
    }
}