Main {
  public static void main(String args[]) throws Exception {{
    XPath m = XPath.parse(System.in);
    // m.display();
    ClassGraph cgfull = new ClassGraph(true, false);
    ClassGraph cg = new ClassGraph(cgfull,
      "from XPath bypassing -> *,tail,* to *");
    System.out.println("done");

    String parents = "from XPath bypassing ->*,parent,*" +
  		   "to {UnaryCompound, BinaryCompound}";
    cg.traverse(m,parents,new ParentSettingVisitor());
    m.display();
  }}
}
ParentSettingVisitor {
  {{
  public void start() {}
  public void before (BinaryCompound host) {
    host.get_arg1().set_parent(host);
    host.get_arg2().set_parent(host);
  }
  public void before (UnaryCompound host) {
    host.get_arg1().set_parent(host);
  }
  }}
}

XPath {
 void display() bypassing -> *,parent,* to * (DisplayVisitor); 
}