LucJSON

Luc JSON is a library that uses JSONSerialization's implementation, but replaces all the Any and uses JSON type.

Why remove Any?

The fact that JSONSerialization returns Any is the biggest lie ever, as JSON defines explicitly what can be represented as JSON and what cannot. That is why JSON in this library is the following enum:

enum JSON {
    case null
    case number(NSNumber)
    case bool(Bool)
    case string(String)
    case object([String: JSON])
    case array([JSON])
}

Moreover, there is also performance implications when using Any:

Whenever you do the following:

let json: Any = //JSON from the JSONSerialization
let object: [String: Any]? = json as? [String: Any]

It has to go through the whole object, to make sure that all the keys are String. Which is O(n) time complexity where n is the number of keys in the JSON object.

In the LucJSON we achieve with the following code:

let json: JSON = //JSON from the JSON.Serialization
let object: [String: JSON]? = json.object

As the JSON is enum it is now accomplished with a regular case check and there is no need to go through all the keys, as the keys can only be String in the enum