Subscripts

Subscripts can be defined in structures like Classes, Enums. They are shortcuts for accessing elements using the index syntax member[index]. Subscripts are natively implemented containers like Lists and Dictionaries. The Subscript behavior can be defined itself by defining the special subscript method into the member.

To implement Subscripts, the member must implement the Subscriptable Prefab.

Static Subscripts

warning

At this moment, Drift does not implement static subscripts.

class A with Subscriptable {
    static {
        subscript (index: Int) : Int {
            get {
                ...
            }
            
            set {
                ...     // $newValue injected
            }
        }
    }
}
// A[i]    A[i] = value


class B : +Subscriptable {
    static {
        subscript (x: Int, y: Int) : Int {
            return ...
        }
    }
}
// B[x, y]     B[x, y] = value

Dynamic Subscripts

warning

At this moment, Drift does not implement dynamic subscripts.

class A with Subscriptable {
    subscript (index: Int) : Int {
        get {
            ...
        }
        
        set {
            ...     // $newValue injected
        }
    }
}
// member[i]    member[i] = value


class B : +Subscriptable {
    subscript (x: Int, y: Int) : Int {
        return ...
    }
}
// member[x, y]     member[x, y] = value