Adopting protocols using a synthesized implementation

Swift can automatically provide protocol conformance for the Equatable, Hashable, and Comparable protocols in specific cases. What this means is we do not need to write the boilerplate code to implement these protocols, and instead we can use the synthesized implementations. This only works if the structures or enumerations (not classes) contain only stored properties (for structures) or associated values (for enumerations) that conform to the Equatable, Hashable, and Comparable protocols.

The Equatable, Hashable, and Comparable protocols are provided by the Swift standard library. Any type that conforms to the Equatable protocols can use the equals operator (==) to compare two instances of the type. Any type that uses the Comparable protocol can use comparative operators to compare two instances of the type. Finally, any type that conforms to the Hashable protocol can be hashed into a Hasher instance to produce an integer...