Class Syntax in Lykn

The kernel class form (DD-07):

(class Dog (Animal)
  (constructor (name breed)
    (super name)
    (assign this:breed breed))

  (speak ()
    (return (template this:name " barks")))

  (describe ()
    (return (template this:name " is a " this:breed))))

class Dog extends Animal {
  constructor(name, breed) {
    super(name);
    this.breed = breed;
  }
  speak() {
    return `${this.name} barks`;
  }
  describe() {
    return `${this.name} is a ${this.breed}`;
  }
}

The Syntax

(class Name (Parent) ...body) — class declaration. The second element is the parent class; empty parens () for no parent.

Methods are bare lists — (method-name (params) body). No func keyword. Methods use kernel function syntax — this is available, explicit return required, no type annotations.

constructor is a regular method name. No special form — just a method the JS engine recognizes.

this is available inside class bodies because this is kernel territory. this:name compiles to this.name.

super for parent calls — (super args) in the constructor, (super:method args) for parent method calls.

camelCase applies — to-string → toString, get-balance → getBalance.

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Class Syntax in Lykn

The Syntax