search for: list_iterator

...sentinel of some sort to represent the "list.end()" iterator. - The way to do this efficiently and safely is to have the sentinel be some un-templated "list_node_base" class that has a next and prev pointer. The next/prev pointers point to "list_node_base", and "list_iterator<T>" downcasts to "T" on dereference. - However, ilist<T> assumes the sentinel is a full-bodied "T" and uses "T*" for the "next" pointers. In practice consumers override the sentinel traits so that the sentinel is only a "ilist_half_node...