Thread: C++ structs & inheritance, or something

What's this:

Code:

class DemoTree : public Gtk::TreeView
{
  private:
    struct Columns : public Gtk::TreeModelColumnRecord             
    {
      Gtk::TreeModelColumn<Glib::ustring> column1;
      Gtk::TreeModelColumn<Glib::ustring> color;
      Columns() { add(column1);add(color); }
    };
    Columns columns;

I mean, it looks like a struct definition, but what is the significance of the ": public Gtk::TreeModelColumnRecord"? (which a Gtk::TreeModelColumnRecord is not a struct...)

Originally Posted by tabstop

A struct is a class, in C++....

makes sense. They should really make that clearer somewhere.

Originally Posted by MK27

makes sense. They should really make that clearer somewhere.

The difference is that structs have everything public by default and classes have everything private by default.