namespace ComplexExpression.
export class Main {
public run =>
let SuperClass object = SubClass.
object keyword: object +<> SubClass unary.
}
partial class SuperClass {
public keyword: Number object =>
object + 2.
public +<> Number object =>
object + 20.
}
class SubClass {
is SuperClass.
public unary -> UInt8 => 20.
}