Is it possible to create extension constructors in Kotlin?

Question

In other languages like Swift, there is the possibility of creating a function extension that adds a new constructor.

Something like this:

// base c         


        

Answer 1

You can't do this. What you can do though: Extend the companion object of a class with a factory method:

// base class
class Whatever() {
    companion object {

    }

}

// factory extension
fun Whatever.Companion.withPotato(potato: String) {
    //setPotato(potato)
}

fun main(args: Array) {
    println(Whatever.withPotato("holi"))
}

The only problem: A companion object has to be existent to do this.