Idea for primary constructor in classes

[kevinbarabash]

class Foo(x, y) {
    x: number = x
    y: number = y

    // optional initializer
    init(self) {
       // self.x and self.y will be guaranteed to be initialized by this point
       // do something self.x or self.y
    }
}

This syntax is similar to public class fields but gets rid of the explicit constructor() and replaces it with the ability for the class to have a param list itself.

References:

• https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Classes/Public_class_fields