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iterator.hpp
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617 lines (530 loc) · 14.8 KB
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* iterator.hpp :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: davidzh <davidzh@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2020/07/13 17:43:14 by tyamcha #+# #+# */
/* Updated: 2022/09/11 19:42:24 by davidzh ### ########.fr */
/* */
/* ************************************************************************** */
#ifndef ITERATOR_HPP
# define ITERATOR_HPP
namespace ft
{
struct input_iterator_tag {};
struct output_iterator_tag {};
struct forward_iterator_tag : public input_iterator_tag {};
struct bidirectional_iterator_tag : public forward_iterator_tag {};
struct random_access_iterator_tag : public bidirectional_iterator_tag {};
template<typename _Category, typename _Tp, typename _Distance = ptrdiff_t,
typename _Pointer = _Tp*, typename _Reference = _Tp&>
struct iterator
{
typedef _Category iterator_category;
typedef _Tp value_type;
typedef _Distance difference_type;
typedef _Pointer pointer;
typedef _Reference reference;
};
template<typename _Iterator>
struct iterator_traits
{
typedef typename _Iterator::iterator_category iterator_category;
typedef typename _Iterator::value_type value_type;
typedef typename _Iterator::difference_type difference_type;
typedef typename _Iterator::pointer pointer;
typedef typename _Iterator::reference reference;
};
template<typename _Tp>
struct iterator_traits<_Tp*>
{
typedef random_access_iterator_tag iterator_category;
typedef _Tp value_type;
typedef ptrdiff_t difference_type;
typedef _Tp* pointer;
typedef _Tp& reference;
};
template<typename _Tp>
struct iterator_traits<const _Tp*>
{
typedef random_access_iterator_tag iterator_category;
typedef _Tp value_type;
typedef ptrdiff_t difference_type;
typedef const _Tp* pointer;
typedef const _Tp& reference;
};
template<typename _Iter>
typename ft::iterator_traits<_Iter>::iterator_category
iterator_category(const _Iter&)
{
return (typename ft::iterator_traits<_Iter>::iterator_category());
}
template<typename _Iterator, bool _HasBase>
struct _Iter_base
{
typedef _Iterator iterator_type;
static iterator_type _S_base(_Iterator it)
{
return (it);
}
};
template<typename _Iterator>
struct _Iter_base<_Iterator, true>
{
typedef typename _Iterator::iterator_type iterator_type;
static iterator_type _S_base(_Iterator it)
{
return (it.base());
}
};
template<typename _InputIterator>
typename ft::iterator_traits<_InputIterator>::difference_type
distance(_InputIterator first, _InputIterator last,
input_iterator_tag)
{
typename ft::iterator_traits<_InputIterator>::difference_type n = 0;
while (first != last)
{
++first;
++n;
}
return (n);
}
template<typename _RandomAccessIterator>
typename ft::iterator_traits<_RandomAccessIterator>::difference_type
distance(_RandomAccessIterator first, _RandomAccessIterator last,
random_access_iterator_tag)
{
return (last - first);
}
template<typename _InputIterator>
inline
typename ft::iterator_traits<_InputIterator>::difference_type
distance(_InputIterator first, _InputIterator last)
{
return (ft::distance(first, last,
ft::iterator_category(first)));
}
template<typename _InputIterator, typename _Distance>
inline void
advance(_InputIterator& i, _Distance n, input_iterator_tag)
{
while (n--)
++i;
}
template<typename _BidirectionalIterator, typename _Distance>
inline void
advance(_BidirectionalIterator& i, _Distance n,
bidirectional_iterator_tag)
{
if (n > 0)
while (n--)
++i;
else
while (n++)
--i;
}
template<typename _RandomAccessIterator, typename _Distance>
inline void
advance(_RandomAccessIterator& i, _Distance n,
random_access_iterator_tag)
{
i += n;
}
template<typename _InputIterator, typename _Distance>
inline void
advance(_InputIterator& i, _Distance n)
{
typename ft::iterator_traits<_InputIterator>::difference_type d = n;
ft::advance(i, d, ft::iterator_category(i));
}
template<typename _Iterator>
class reverse_iterator
: public iterator<typename ft::iterator_traits<_Iterator>::iterator_category,
typename ft::iterator_traits<_Iterator>::value_type,
typename ft::iterator_traits<_Iterator>::difference_type,
typename ft::iterator_traits<_Iterator>::pointer,
typename ft::iterator_traits<_Iterator>::reference>
{
protected:
_Iterator current;
typedef ft::iterator_traits<_Iterator> traits_type;
public:
typedef _Iterator iterator_type;
typedef typename traits_type::difference_type difference_type;
typedef typename traits_type::pointer pointer;
typedef typename traits_type::reference reference;
reverse_iterator(void) : current() {}
reverse_iterator(iterator_type x) : current(x) {}
reverse_iterator(const reverse_iterator& x) : current(x.current) {}
template<typename _Iter>
reverse_iterator(const reverse_iterator<_Iter>& x) : current(x.base()) {}
iterator_type
base(void) const
{
return (current);
}
reference
operator* (void) const
{
_Iterator tmp = current;
return (*(--tmp));
}
pointer
operator-> (void) const
{
return (&(operator*()));
}
reverse_iterator&
operator++ (void)
{
--current;
return (*this);
}
reverse_iterator
operator++ (int)
{
reverse_iterator tmp = *this;
--current;
return (tmp);
}
reverse_iterator&
operator-- (void)
{
++current;
return (*this);
}
reverse_iterator
operator-- (int)
{
reverse_iterator tmp = *this;
++current;
return (tmp);
}
reverse_iterator
operator+ (difference_type n) const
{
return (reverse_iterator(current - n));
}
reverse_iterator&
operator+= (difference_type n)
{
current -= n;
return (*this);
}
reverse_iterator
operator- (difference_type n) const
{
return (reverse_iterator(current + n));
}
reverse_iterator&
operator-= (difference_type n)
{
current += n;
return (*this);
}
reference
operator[] (difference_type n) const
{
return (*(*this + n));
}
};
template<typename _Iterator>
inline bool
operator== (const reverse_iterator<_Iterator>& x,
const reverse_iterator<_Iterator>& y)
{
return (x.base() == y.base());
}
template<typename _Iterator>
inline bool
operator< (const reverse_iterator<_Iterator>& x,
const reverse_iterator<_Iterator>& y)
{
return (y.base() < x.base());
}
template<typename _Iterator>
inline bool
operator!= (const reverse_iterator<_Iterator>& x,
const reverse_iterator<_Iterator>& y)
{
return (!(x == y));
}
template<typename _Iterator>
inline bool
operator> (const reverse_iterator<_Iterator>& x,
const reverse_iterator<_Iterator>& y)
{
return (y < x);
}
template<typename _Iterator>
inline bool
operator<= (const reverse_iterator<_Iterator>& x,
const reverse_iterator<_Iterator>& y)
{
return (!(y < x));
}
template<typename _Iterator>
inline bool
operator>= (const reverse_iterator<_Iterator>& x,
const reverse_iterator<_Iterator>& y)
{
return (!(x < y));
}
template<typename _ItL, typename _ItR>
inline bool
operator== (const reverse_iterator<_ItL>& x,
const reverse_iterator<_ItR>& y)
{
return (x.base() == y.base());
}
template<typename _ItL, typename _ItR>
inline bool
operator< (const reverse_iterator<_ItL>& x,
const reverse_iterator<_ItR>& y)
{
return (y.base() < x.base());
}
template<typename _ItL, typename _ItR>
inline bool
operator!= (const reverse_iterator<_ItL>& x,
const reverse_iterator<_ItR>& y)
{
return (!(x == y));
}
template<typename _ItL, typename _ItR>
inline bool
operator> (const reverse_iterator<_ItL>& x,
const reverse_iterator<_ItR>& y)
{
return (y < x);
}
template<typename _ItL, typename _ItR>
inline bool
operator<= (const reverse_iterator<_ItL>& x,
const reverse_iterator<_ItR>& y)
{
return (!(y < x));
}
template<typename _ItL, typename _ItR>
inline bool
operator>= (const reverse_iterator<_ItL>& x,
const reverse_iterator<_ItR>& y)
{
return (!(x < y));
}
template<typename _Iterator>
inline typename reverse_iterator<_Iterator>::difference_type
operator- (const reverse_iterator<_Iterator>& x,
const reverse_iterator<_Iterator>& y)
{
return (y.base() - x.base());
}
template<typename _ItL, typename _ItR>
inline typename reverse_iterator<_ItL>::difference_type
operator- (const reverse_iterator<_ItL>& x,
const reverse_iterator<_ItR>& y)
{
return (y.base() - x.base());
}
template<typename _Iterator>
inline reverse_iterator<_Iterator>
operator+ (typename reverse_iterator<_Iterator>::difference_type n,
const reverse_iterator<_Iterator>& x)
{
return (reverse_iterator<_Iterator>(x.base() - n));
}
template<typename _Iterator, typename _Container>
class normal_iterator
{
protected:
_Iterator _M_current;
typedef ft::iterator_traits<_Iterator> traits_type;
public:
typedef _Iterator iterator_type;
typedef typename traits_type::iterator_category iterator_category;
typedef typename traits_type::value_type value_type;
typedef typename traits_type::difference_type difference_type;
typedef typename traits_type::reference reference;
typedef typename traits_type::pointer pointer;
normal_iterator (void)
: _M_current(_Iterator())
{}
explicit
normal_iterator(const _Iterator& i)
: _M_current(i)
{}
reference
operator* (void) const
{
return (*_M_current);
}
pointer
operator-> (void) const
{
return (_M_current);
}
normal_iterator&
operator++ (void)
{
++_M_current;
return (*this);
}
normal_iterator
operator++ (int)
{
return (normal_iterator(_M_current++));
}
normal_iterator&
operator-- (void)
{
--_M_current;
return (*this);
}
normal_iterator
operator-- (int)
{
return (normal_iterator(_M_current--));
}
reference
operator[] (difference_type n) const
{
return (_M_current[n]);
}
normal_iterator&
operator+= (difference_type n)
{
_M_current += n;
return (*this);
}
normal_iterator
operator+ (difference_type n) const
{
return (normal_iterator(_M_current + n));
}
normal_iterator&
operator-= (difference_type n)
{
_M_current -= n;
return (*this);
}
normal_iterator
operator- (difference_type n) const
{
return (normal_iterator(_M_current - n));
}
const _Iterator&
base(void) const
{
return (_M_current);
}
};
template<typename _ItL, typename _ItR, typename _Container>
inline bool
operator== (const normal_iterator<_ItL, _Container>& lhs,
const normal_iterator<_ItR, _Container>& rhs)
{
return (lhs.base() == rhs.base());
}
template<typename _Iterator, typename _Container>
inline bool
operator== (const normal_iterator<_Iterator, _Container>& lhs,
const normal_iterator<_Iterator, _Container>& rhs)
{
return (lhs.base() == rhs.base());
}
template<typename _ItL, typename _ItR, typename _Container>
inline bool
operator!= (const normal_iterator<_ItL, _Container>& lhs,
const normal_iterator<_ItR, _Container>& rhs)
{
return (lhs.base() != rhs.base());
}
template<typename _Iterator, typename _Container>
inline bool
operator!= (const normal_iterator<_Iterator, _Container>& lhs,
const normal_iterator<_Iterator, _Container>& rhs)
{
return lhs.base() != rhs.base();
}
template<typename _ItL, typename _ItR, typename _Container>
inline bool
operator< (const normal_iterator<_ItL, _Container>& lhs,
const normal_iterator<_ItR, _Container>& rhs)
{
return lhs.base() < rhs.base();
}
template<typename _Iterator, typename _Container>
inline bool
operator< (const normal_iterator<_Iterator, _Container>& lhs,
const normal_iterator<_Iterator, _Container>& rhs)
{
return (lhs.base() < rhs.base());
}
template<typename _ItL, typename _ItR, typename _Container>
inline bool
operator> (const normal_iterator<_ItL, _Container>& lhs,
const normal_iterator<_ItR, _Container>& rhs)
{
return (lhs.base() > rhs.base());
}
template<typename _Iterator, typename _Container>
inline bool
operator> (const normal_iterator<_Iterator, _Container>& lhs,
const normal_iterator<_Iterator, _Container>& rhs)
{
return (lhs.base() > rhs.base());
}
template<typename _ItL, typename _ItR, typename _Container>
inline bool
operator<= (const normal_iterator<_ItL, _Container>& lhs,
const normal_iterator<_ItR, _Container>& rhs)
{
return (lhs.base() <= rhs.base());
}
template<typename _Iterator, typename _Container>
inline bool
operator<= (const normal_iterator<_Iterator, _Container>& lhs,
const normal_iterator<_Iterator, _Container>& rhs)
{
return (lhs.base() <= rhs.base());
}
template<typename _ItL, typename _ItR, typename _Container>
inline bool
operator>= (const normal_iterator<_ItL, _Container>& lhs,
const normal_iterator<_ItR, _Container>& rhs)
{
return (lhs.base() >= rhs.base());
}
template<typename _Iterator, typename _Container>
inline bool
operator>= (const normal_iterator<_Iterator, _Container>& lhs,
const normal_iterator<_Iterator, _Container>& rhs)
{
return (lhs.base() >= rhs.base());
}
template<typename _IteratorL, typename _IteratorR, typename _Container>
inline typename normal_iterator<_IteratorL, _Container>::difference_type
operator- (const normal_iterator<_IteratorL, _Container>& lhs,
const normal_iterator<_IteratorR, _Container>& rhs)
{
return (lhs.base() - rhs.base());
}
template<typename _Iterator, typename _Container>
inline typename normal_iterator<_Iterator, _Container>::difference_type
operator-(const normal_iterator<_Iterator, _Container>& lhs,
const normal_iterator<_Iterator, _Container>& rhs)
{
return (lhs.base() - rhs.base());
}
template<typename _Iterator, typename _Container>
inline normal_iterator<_Iterator, _Container>
operator+ (typename normal_iterator<_Iterator, _Container>::difference_type
n, const normal_iterator<_Iterator, _Container>& i)
{
return (normal_iterator<_Iterator, _Container>(i.base() + n));
}
}
#endif