How are the internal mechanisms of the Optional class implemented in the programming language?

In Swift language, the Optional class is implemented as an enumeration (enum) with two states: .none and .some(Wrapped), where Wrapped is the type of the value that may be contained inside. This allows safe handling of the absence of a value without directly using nil.

Example of the internal structure of Optional:

enum Optional<Wrapped> {
    case none
    case some(Wrapped)
}

At the same time, Optional provides methods and properties for convenient work, such as map, flatMap, unwrap, and others. This helps avoid errors related to accessing a missing value and makes the code safer and more expressive.