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ReverseIterator.hpp
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ReverseIterator.hpp
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#pragma once
#include "miscellaneous.hpp"
namespace ft
{
template <typename Iterator>
class reverse_iterator
{
public:
typedef Iterator iterator_type;
typedef typename iterator_type::value_type value_type;
typedef typename iterator_type::difference_type difference_type;
typedef typename iterator_type::pointer pointer;
typedef typename iterator_type::reference reference;
typedef typename iterator_type::iterator_category iterator_category;
reverse_iterator() { };
explicit reverse_iterator(iterator_type it) : _current(--it) { }// { operator=(--it);//}_current = it.base() - 1;}
reverse_iterator(const reverse_iterator<iterator_type>& rIt) { _current = --rIt.base();}
template<typename Iter>
reverse_iterator (reverse_iterator<Iter> const& rIt): _current(--rIt.base()) {}
iterator_type base() const { iterator_type it = _current; return ++it;}
//reference operator*() const { return *(_current.base());}
reference operator*() const
{
iterator_type tmp = _current;
return (*(tmp));
}
pointer operator->() const { return &(operator*());};
reference operator[](difference_type n) const { return _current[-n];};
reverse_iterator& operator= (const reverse_iterator& x) { _current = --x.base(); return (*this);}
reverse_iterator& operator+=(difference_type n) { this->_current -= n; return (*this);};
reverse_iterator& operator-=(difference_type n) { this->_current += n; return (*this);};
reverse_iterator& operator++() { --_current; return (*this);}
reverse_iterator operator++(int) { reverse_iterator tmp = *this; --_current; return (tmp);}
reverse_iterator& operator--() { ++_current; return (*this);}
reverse_iterator operator--(int) { reverse_iterator tmp(*this); ++_current; return (tmp);}
reverse_iterator operator+(difference_type n) const { reverse_iterator tmp(*this); tmp._current -= n; return tmp;}
reverse_iterator operator-(difference_type n) const { reverse_iterator tmp(*this); tmp._current += n; return tmp;}
operator reverse_iterator<const iterator_type>() const { return reverse_iterator<const iterator_type>(_current);}
private :
iterator_type _current;
};
template <class Iterator>
bool operator== (
const reverse_iterator<Iterator>& lhs,
const reverse_iterator<Iterator>& rhs)
{
return lhs.base() == rhs.base();
};
template <class Iterator>
bool operator< (
const reverse_iterator<Iterator>& lhs,
const reverse_iterator<Iterator>& rhs)
{
return lhs.base() > rhs.base();
};
template <class Iterator>
bool operator> (
const reverse_iterator<Iterator>& lhs,
const reverse_iterator<Iterator>& rhs)
{
return lhs.base() < rhs.base();
};
template <class Iterator>
bool operator!= (
const reverse_iterator<Iterator>& lhs,
const reverse_iterator<Iterator>& rhs)
{
return lhs.base() != rhs.base();
};
template <class Iterator>
bool operator>= (
const reverse_iterator<Iterator>& lhs,
const reverse_iterator<Iterator>& rhs)
{
return lhs.base() <= rhs.base();
};
template <class Iterator>
bool operator<= (
const reverse_iterator<Iterator>& lhs,
const reverse_iterator<Iterator>& rhs)
{
return lhs.base() >= rhs.base();
};
template <class Iterator>
reverse_iterator<Iterator> operator+(
typename reverse_iterator<Iterator>::difference_type n,
const reverse_iterator<Iterator>& x)
{
reverse_iterator<Iterator> tmp (x.base() - n);
return (tmp);
};
template <class Iterator>
typename reverse_iterator<Iterator>::difference_type operator- (
const reverse_iterator<Iterator>& lhs,
const reverse_iterator<Iterator>& rhs)
{
return (rhs.base() - lhs.base());
}
}