Check an empty Gtk::TreeIter?

[Phong Cao <phngcv gmail com>]

Hello everybody,

I am current stuck with how to check an empty, uninitialized Gtk::TreeIter. I have checked out the documentation for Gtk::TreeIter, Gtk::TreePath & Gtk::TreeModel & have not found any function for checking an empty Gtk::TreeIter. Here is what I did, but it was not compiled:

#include <iostream>

class Base {
  public:
    Base();
    virtual ~Base();

    void checkEmptyIter();

  private:
    Gtk::TreeModel::iterator iter;
};

Base::Base() {
  //the treeiter is not initialized to make sure it is empty
}

Base::~Base() {
}

void Base::checkEmptyIter() {
  if (iter == NULL) {                                           //can't compile
    std::cout << "d_iter is empty" << std::endl; 
  }
}

Does anybody know anyway to check if a Gtk::TreeIter is empty? 

Thank you for reading my message and I hope you guys have a good week!

-- 
Phong V. Cao

phngcv gmail com