How may I test the equivalency of enumeration cases with associated values in Swift 4

Question

I would like to test the equivalency of a couple variables of enumeration types, like this:

enum AnEnumeration {
          


        

Answer 1

The Swift proposal

• SE-0185 Synthesizing Equatable and Hashable conformance

has been accepted and implemented in Swift 4.1 (Xcode 9.3):

... synthesize conformance to Equatable/Hashable if all of its members are Equatable/Hashable.

therefore it suffices to

... opt-in to automatic synthesis by declaring their type as Equatable or Hashable without implementing any of their requirements.

In your example – since String is Equatable – it will suffice to declare

enum AnEnumeration: Equatable {
  case aSimpleCase
  case anotherSimpleCase
  case aMoreComplexCase(String)
}

and the compiler will synthesize a suitable == operator.