STL 요소 만들어보기(3)

#include <xutility> // bidirectional_iterator_tag

namespace STD {

template<class C >

class ListIterator

{

public:

typedef typename C::elem_type elem_type; // 요소 타입

typedef typename C::node_type node_type;

typedef typename C::node_pointer_type node_pointer_type;

typedef typename C::iterator iterator;

typedef typename C::value_type value_type;

typedef std::bidirectional_iterator_tag iterator_category;

typedef typename C::difference_type difference_type;

typedef typename C::pointer pointer;

typedef typename C::reference reference;

ListIterator(node_type* node) {

_ptr = node;

}

bool operator!=(iterator& rhs) {

return (this->_ptr) != rhs._ptr;

}

bool operator==(iterator& rhs) {

return (this->_ptr) == rhs._ptr;

}

elem_type operator*() {

return (_ptr->_data);

}

node_type* operator++() {

return _ptr = _ptr->next;

}

node_type* operator++(int c) {

return _ptr = _ptr->next;

}

private:

node_type* _ptr;

};

}