Writing a good Hashable implementation in Swift

Question

In Objective-C (and other languages) a relatively good default implementation of - (NSUInteger)hash might be:

- (NSUInteger)hash {
   return 31u         


        

Answer 1

As suggested by Fabian Kreiser one can use the overflow operators to make the hashValue method as follows:

var hashValue: Int {
    return (31 &* property1.hashValue) &+ property2.hashValue 
}

The value still overflows, but at least it doesn't crash