I've written my own container template with an iterator. How do I implement const_iterator?
template <class T>
class my_container {
private:
...
public:
my_container() : ... { }
~my_container() { }
class iterator : public std::iterator<std::bidirectional_iterator_tag, T> {
public: ...
The only difference should be that when you de-reference a const iterator you get a const reference rather than a reference to the object in the container.