TaggedTest.swift

import Foundation
import Tagged

struct Product: Codable {
    let id: ProductID
    let descr: String
    
    typealias ProductID = Tagged<Product, UUID>
}

struct Inventory: Codable {
    let products: [Product]
    let promotedProductID: Product.ProductID
}

struct TaggedJSONData {
    static let inventoryJSON: String = """
{
    "products": [
        {
            "id": "0B3DBF1A-EE56-41F5-8666-16CA8DAFD03F",
            "descr": "Silver Fork"
        },
        {
            "id": "CF66A6B3-2D17-4B87-8C9A-C1700C083EE9",
            "descr": "Wooden spoon"
        },
        {
            "id": "F6A85945-9B6D-44EB-A9A8-FD68A8161790",
            "descr": "Plastic knife"
        }
    ],
    "promotedProductID": "CF66A6B3-2D17-4B87-8C9A-C1700C083EE9"
}
"""
    
    static func parseJSON() -> Inventory {
        guard let data = inventoryJSON.data(using: .utf8) else {
            fatalError("bad json string bro")
        }
        let jsonDecoder = JSONDecoder()
        guard let obj = try? jsonDecoder.decode(Inventory.self, from: data) else {
            fatalError("bad json data bro")
        }
        return obj
    }
}


/*
let inventory = TaggedJSONData.parseJSON()


result:

(lldb) po inventory
▿ Inventory
  ▿ products : 3 elements
    ▿ 0 : Product
      ▿ id : 0B3DBF1A-EE56-41F5-8666-16CA8DAFD03F
        - rawValue : 0B3DBF1A-EE56-41F5-8666-16CA8DAFD03F
      - descr : "Silver Fork"
    ▿ 1 : Product
      ▿ id : CF66A6B3-2D17-4B87-8C9A-C1700C083EE9
        - rawValue : CF66A6B3-2D17-4B87-8C9A-C1700C083EE9
      - descr : "Wooden spoon"
    ▿ 2 : Product
      ▿ id : F6A85945-9B6D-44EB-A9A8-FD68A8161790
        - rawValue : F6A85945-9B6D-44EB-A9A8-FD68A8161790
      - descr : "Plastic knife"
  ▿ promotedProductID : CF66A6B3-2D17-4B87-8C9A-C1700C083EE9
    - rawValue : CF66A6B3-2D17-4B87-8C9A-C1700C083EE9

(lldb) 
*.