Xcode doesn't like code, but won't say why

App Development
1

Xcode gives me:
“Failed to produce diagnostic for expression…” when I include the code between /* and */ .
I thought I had faithfully followed the video for M2L14.

The code below the dotted line is a modification of business.swift of M6L12

var body: some View {
    
    VStack (alignment: .leading) {
        
        HStack {
            
            // Office and picture
            VStack (alignment: .leading) {
           
                Image(String(business.name ?? ""))
                    .resizable()
                    .frame(width:58, height:58)
                    .cornerRadius(5)
                    .scaledToFit()
                
                Text(business.name ?? "")
                    .bold()
            }
            Spacer()
           /* 
            HStack {
           { ForEach (business.AWTStaff,id:/.self) { r in Text(r) }
             }
            }

*/
}

        Divider()
    }
    .foregroundColor(.black)
}

}

import Foundation

class Business: Decodable, Identifiable, ObservableObject {

@Published var imageData: Data?

var id: String?
var alias: String?
var name: String?
var imageUrl: String?
var isClosed: Bool?
var url: String?
var reviewCount: Int?
var categories: [Category]?
var rating: Double?
var coordinates: Coordinate?
var transactions: [String]?
var price: String?
var location: Location?
var phone: String?
var displayPhone: String?
var distance: Double?

var Address: String?
var AWTStaff: [String]?


enum CodingKeys: String, CodingKey {
    
    case imageUrl = "image_url"
    case isClosed = "is_closed"
    case reviewCount = "review_count"
    case displayPhone = "display_phone"
    
    case id
    case alias
    case name
    case url
    case categories
    case rating
    case coordinates
    case transactions
    case price
    case location
    case phone
    case distance
    
    case Address
    case AWTStaff
}
2

Several issues here:

  1. You have too many brackets.
 HStack {
 { ForEach (business.AWTStaff,id:/.self) { r in Text(r) }
 }
 }

should be:

HStack {
    ForEach (business.AWTStaff, id:/.self) { r in 
        Text(r) 
    }
}
  1. business.AWTStaff is an Optional array [String]? so you need to unwrap it before you can use it. One way you can do it is like this:
HStack {
    ForEach (business.AWTStaff ?? [], id:/.self) { r in 
        Text(r) 
    }
}
  1. The slash on the id parameter to ForEach is backwards.
/.self

should be:

\.self
3

Thank you for the suggestions, they worked. I had thought about AWTStaff being an optional, but never implemented it. I provided screenshots to my coworkers, they were enthusiastic, and we plan to discuss next Friday at our weekly meeting.
Thanks again.