Swift '(int, int) -> $T4' is not identical to 'Point'

Question

I'm fairly new to swift and get this error. All I want the declaration to do is assign the 4 values to create 2 Point objects for a Line object. So Line(10, 20, 20, 40) should create two points at (10,20) and (20,40). But I get the error '(Int, Int) -> $T4' is not identical to 'Point'

class Point {
var x: Int = 0
var y: Int = 0

init(){
    x = 0
    y = 0
}

init(x: Int, y: Int) {
    self.x = x
    self.y = y
  }
}

class Line: Point {
var pointA: Point
var pointB: Point

init(p1x: Int, p1y: Int, p2x: Int, p2y: Int) {
    self.pointA(p1x, p1y)
    self.pointB(p2x, p2y)
  }
}

var lineA = Line(p1x:10, p1y:20 , p2x:20 , p2y:40)

Answer 1

Your code in Line's init is meaningless. This is not valid Swift:

self.pointA(p1x, p1y)
self.pointB(p2x, p2y)

You can't just stick parentheses after the name of a variable like that! Plus you are not writing your init correctly. Here's a possible fix:

class Line: Point {
    var pointA: Point
    var pointB: Point

    init(p1x: Int, p1y: Int, p2x: Int, p2y: Int) {
        self.pointA = Point(x:p1x, y:p1y)
        self.pointB = Point(x:p2x, y:p2y)
        super.init()
    }
}

But as Antonio has already said, it all depends on what you're trying to do. My code above will cause your code to compile correctly, but I have no idea whether it does what you want, because what you're trying to do is utterly impossible to guess.