Swift Core Data stack built with lazy properties. Warning: untested.

untitled.swift

    // Returns the managed object context for the application.
    // If the context doesn't already exist, it is created and bound to the persistent store coordinator for the application.
    @lazy var managedObjectContext: NSManagedObjectContext = {
        let context = (NSManagedObjectContext() as NSManagedObjectContext?)!
        context.persistentStoreCoordinator = self.persistentStoreCoordinator
        return context
    }()

    // Returns the managed object model for the application.
    // If the model doesn't already exist, it is created from the application's model.
    @lazy var managedObjectModel: NSManagedObjectModel = {
        let modelURL = NSBundle.mainBundle().URLForResource("CoreData", withExtension: "momd")
        return (NSManagedObjectModel(contentsOfURL: modelURL) as NSManagedObjectModel?)!
    }()

    // Returns the persistent store coordinator for the application.
    // If the coordinator doesn't already exist, it is created and the application's store added to it.
    @lazy var persistentStoreCoordinator: NSPersistentStoreCoordinator = {
        let storeURL = self.applicationDocumentsDirectory.URLByAppendingPathComponent("CoreData.sqlite")
        var error: NSError? = nil
        let coordinator = NSPersistentStoreCoordinator(managedObjectModel: self.managedObjectModel)
        if !coordinator.addPersistentStoreWithType(NSSQLiteStoreType, configuration: nil, URL: storeURL, options: nil, error: &error) {
            println("Unresolved error \(error), \(error?.userInfo)")
            abort()
        }
        return coordinator
    }()