Main {
  {{
  static ClassGraph cg;
  public static void main(String args[]) throws Exception {
    Aspect m = Aspect.parse(System.in);
    System.out.println("input ===================== ");
    m.display();
    System.out.println();
    System.out.println(" processing starts ");
    cg = new ClassGraph(true, false);
    cg.traverse(m,
      "from Aspect to ClassName", new Visitor() {
    void before (ClassName host) {
      System.out.println(host.get_ident().toString());
    }
    });
    System.out.println("done: from Aspect to ClassName");

    cg.traverse(m,
      "from Aspect via MethodSignature to ClassName", new Visitor() {
    void before (ClassName host) {
      System.out.println(host.get_ident().toString());
    }
    });
    System.out.println("done: from Aspect via MethodSignature to ClassName");
  }
  }}
}

Aspect {
  void display() to * (DisplayVisitor);
}