CustomStringConvertible example to class

CustomStringConvertibleToClass.swift

class Point: CustomStringConvertible {
    let x: Int, y: Int

    var description: String {
        return "(\(x), \(y))"
    }
    
    init(x: Int, y: Int) {
        self.x = x
        self.y = y
    }
}

let p = Point(x: 21, y: 30)
let s = String(describing: p)

print(s)
print(p)
// Prints "(21, 30)"