Is there such thing as 'didGet' in Swift? A method that is run whenever a variable is accessed?

Question

Basically, I want to do like this:

var counter : Int = 0;
private var _data : String;
var data : String {
    get { counter += 1; return _data; }
    set { _data = newValue; }
}

Then I want to reduce it like this:

var counter : Int = 0;
var data : String {
    get { counter += 1; return data; }
    set { data = newValue; }
}

But I noticed that this can't be done. (Error: Variable used within its initial value). So I then want to simplify it like this:

var counter : Int = 0;
var data : String {
    didGet { counter += 1; }
}

But there's no such thing as didGet. Is there any way to do this without adding new other variable? I need to run counter += 1 every time data is accessed, without adding new variable as storage. Thanks.

Answer 1

No, there is no way to do it without adding new variable.

If you return in the get method of the variable the same variable, you will create infinite loop.