import math

class Point
  public
    func Point(x: float, y: float)
      this.x = x
      this.y = y

    func distance(a: Point, b: Point): float
      float x_distance = Math.abs(a.x - b.x)
      float y_distance = Math.abs(a.y - b.y)

      return Math.sqrt(x_distance ** 2 + y_distance ** 2)
  private
    this.x: float
    this.y: float

func dist(Point a, Point b) -> float

dist -> float: Point a, Point b

dist :: Point -> Point -> Float

dist :: (Point, Point) -> Float

dist(a, b) :: (Point, Point) -> Float { /* ... */ }

func dist#float: Point a, b

func add#int: int a, b
  return a + b

func add->int: int a, b

class Seq>T
  Seq(T start, func fn)
    this.start = start
    this.fn = fn

  func nth(int n): T
    int counter = 0
    T temp = this.start

    for _ in [0->counter]
      temp = this.fn(temp)

    return temp