Lykn

Accessors and Static Members

Getters and Setters

get and set markers before the method name:

(class Circle ()
  (field -radius 0)

  (constructor (r)
    (assign this:-radius r))

  (get area ()
    (return (* Math:PI this:-radius this:-radius)))

  (set radius (r)
    (if (< r 0)
      (throw (new Error "Radius cannot be negative")))
    (assign this:-radius r)))

circle:area looks like a property access but runs a computation. (= circle:radius 10) looks like assignment but runs validation.

Static Members

The static wrapper:

(class MathUtils ()
  (static (add (a b) (return (+ a b))))
  (static (field PI 3.14159)))

class MathUtils {
  static add(a, b) { return a + b; }
  static PI = 3.14159;
}

Static members belong to the class itself, not to instances. Access via the class name: MathUtils:add, MathUtils:PI.