Equatable+nil.swift

// Equatable+nil.swift

struct Model: Equatable { }

let model = Model()

print(model == nil)    // This compiles and produces a warning
print(model == .none)  // This compiles with no warning

I guess synthesized equatable definitions will produce something like this:

struct HandModel {
  static func == (lhs: HandModel, rhs: HandModel) -> Bool {
    return true
  }

  static func == (lhs: HandModel, rhs: HandModel?) -> Bool {
    guard let rhs = rhs else { return false }

    return lhs == rhs
  }
}