Naming Convention for Methods and Properties in Swift. Can I use "get", "set" and "is" Keywords?

Question

When I create a function in Swift, can I use "get" and "set" words? For instance can I declare a function as func getAuthorizedUsers() instead of func authorizedUsers()? In ObjectiveC get and set keywords are not suggested to use when declaring functions. How about in Swift?

Also, when declaring properties can I use "is" keyword? For instance:

public var isAuthorized: Bool {
    get {            
        return true
    }
}

I have read Swift naming convention documents but I couldn't find the answer of my question. Thank you.

Answer 1

The rules are all outlined here.

For get, that clearly violates the "Omit needless words" rule. If a method returns something, the call site will know that it is used to get some value. You don't need to repeat that idea. You can consider turning this into a computed property if no parameters are required.

For set, it might be appropriate sometimes. If your method only need one parameter and there is a corresponding getter,

func getFoo() -> Int {
    ...
}

func setFoo(_ foo: Int) {
    ...
}

That's a pretty good sign that this can be turned into a computed property:

var foo: Int {
    get { ... }
    set { ... }
}

A good example where it is appropriate to have set is the UIButton.setTitle method. It takes in two parameters, so a computed property wouldn't work.

For is, that clearly conforms to the rule "Uses of Boolean methods and properties should read as assertions about the receiver". So yes, you should use it for boolean members.