print("\n--- Test: Class methods with this (assignment allowed) ---");

class Person {
  var name;
  func setName(n) { this.name = n; }
  func getName() { return this.name; }
}

var p = Person();
p.setName("Bob");
assert(p.getName() == "Bob", "this-based methods should read/write instance fields");

print("Class with this: PASS");