What methods does the Hashable protocol in Swift implement?

The Hashable protocol in Swift requires the implementation of the hash(into:) method, which takes one parameter — an inout Hasher object. In this method, you need to pass all properties that influence the uniqueness of the object into the hasher to generate a hash code.

Example:

struct Person: Hashable {
    var name: String
    var age: Int

    func hash(into hasher: inout Hasher) {
        hasher.combine(name)
        hasher.combine(age)
    }
}

Additionally, to conform to Hashable, the type must also conform to Equatable, meaning it must implement the == operator. In most cases, the compiler automatically generates these methods if all properties are also Hashable and Equatable.