How to represent Core Data optional Scalars (Bool/Int/Double/Float) in Swift?

Question

(first noticed on: Xcode 8.2.1, iOS 10, Swift 3) (still present as of: Xcode 9 beta 3, iOS11, Swift 4)

We all know that the Core Data concept of o

Answer 1

This happens because Objective-C scalar types do not have a notion of nil value. Source: handling-core-data-optional-scalar-attributes