Open Radar

 
Summary:
App crashes. 

Here is my code // 

//
//  ArmaturListViewModel.swift
//  
//
//  Created by Konstantin Koval on 29/10/14.
//
//

import UIKit

class ArmaturListViewModel: RobotViewModel {
   var tableModel = Factory.tableModel()
 }

private extension ArmaturListViewModel {

  private class Factory {
    
    class func tableModel() -> ArrayTableViewModel<ArmaturType> {
      func armaturs() -> [Armatur] {
        return [
          Armatur(name: "Glamox 123", length: 1200, holesDistance: 800),
          Armatur(name: "Glamox 450", length: 1000, holesDistance: 500)]
      }
      return ArrayTableViewModel(items:armaturs()) // crash here!!!

    }
  }
}

// ArrayTableViewModel
protocol TableViewModelType {

  typealias Element
  var sections: Int { get}
  func numberOfRowsInSection(section: Int) -> Int
  subscript (i: NSIndexPath) -> Element { get }
}

class ArrayTableViewModel<T> : TableViewModelType {

  var items: Array<T>
  var sections = 0
  
  init (items: Array<T>) {
    self.items = items
  }

  func numberOfRowsInSection(section: Int) -> Int {
    return items.count
  }
  
  subscript (i: NSIndexPath) -> T {
    return items[i.row]
  }
}

// Model
protocol ArmaturType {
  var name: String {get}

  var length: Int {get}
  var holesDistance: Int {get}
}

class Armatur: ArmaturType {
  let name: String
  let length: Int
  let holesDistance: Int
  
  init(name: String, length: Int, holesDistance: Int) {
    self.name = name
    self.length = length
    self.holesDistance = holesDistance
  }
}



Steps to Reproduce:
Run app, it crash