Swift function overloading - invoking func with specific parameter (in place of Any parameter) on passing Any object

[Devarshi Kulshreshtha via Cocoa-dev]

I have 3 structs:

    struct Address: Codable {
        var addressLine1: String
    }
    struct Person: Codable {
        var name: String
    }
    struct Order: Codable {
        var person: Person?
        var address: Address?
    }

In my ViewController class I am using Mirror to access each of the
properties within Order:

    let address = Address(addressLine1: "Some unknown address")
    let person = Person(name: "Some unknown name")
    let order = Order(person: person, address: address)

    let newOrderMirror = Mirror(reflecting: order)
    newOrderMirror.children.forEach {
        display(child: $0.value)
    }

In ViewController I have implemented 3 display functions:

    func display(child: Any) {
        // this should never get called
        print(child)
    }
    func display(child: Person) {
        print(child)
    }
    func display(child: Address) {
        print(child)
    }

In above case it is always invoking `func display(child: Any)`, however I
want it to invoke the functions with specific parameter. Is there any way
to achieve this without type casting?:

Off-course this will work:

        newOrderMirror.children.forEach {
            if let bs = $0.value as? Person {
                display(child: bs)
            } else if let addr = $0.value as? Address {
                display(child: addr)
            }
            display(child: $0.value)
        }

Is there any other elegant way to achieve the desired behavior without
using `if-let + typecasting`?

-- 
Thanks,

Devarshi
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