#ifndef _ITERATOR_H
#define _ITERATOR_H 1
#include <bits/cpp_type_traits.h>
#include <ext/type_traits.h>
_GLIBCXX_BEGIN_NAMESPACE(std)
template<typename _Iterator>
class reverse_iterator
: public iterator<typename iterator_traits<_Iterator>::iterator_category,
typename iterator_traits<_Iterator>::value_type,
typename iterator_traits<_Iterator>::difference_type,
typename iterator_traits<_Iterator>::pointer,
typename iterator_traits<_Iterator>::reference>
{
protected:
_Iterator current;
public:
typedef _Iterator iterator_type;
typedef typename iterator_traits<_Iterator>::difference_type
difference_type;
typedef typename iterator_traits<_Iterator>::reference reference;
typedef typename iterator_traits<_Iterator>::pointer pointer;
public:
reverse_iterator() : current() { }
explicit
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() const
{ return current; }
reference
operator*() const
{
_Iterator __tmp = current;
return *--__tmp;
}
pointer
operator->() const
{ return &(operator*()); }
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
{ 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 _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 _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 _IteratorL, typename _IteratorR>
inline bool
operator==(const reverse_iterator<_IteratorL>& __x,
const reverse_iterator<_IteratorR>& __y)
{ return __x.base() == __y.base(); }
template<typename _IteratorL, typename _IteratorR>
inline bool
operator<(const reverse_iterator<_IteratorL>& __x,
const reverse_iterator<_IteratorR>& __y)
{ return __y.base() < __x.base(); }
template<typename _IteratorL, typename _IteratorR>
inline bool
operator!=(const reverse_iterator<_IteratorL>& __x,
const reverse_iterator<_IteratorR>& __y)
{ return !(__x == __y); }
template<typename _IteratorL, typename _IteratorR>
inline bool
operator>(const reverse_iterator<_IteratorL>& __x,
const reverse_iterator<_IteratorR>& __y)
{ return __y < __x; }
template<typename _IteratorL, typename _IteratorR>
inline bool
operator<=(const reverse_iterator<_IteratorL>& __x,
const reverse_iterator<_IteratorR>& __y)
{ return !(__y < __x); }
template<typename _IteratorL, typename _IteratorR>
inline bool
operator>=(const reverse_iterator<_IteratorL>& __x,
const reverse_iterator<_IteratorR>& __y)
{ return !(__x < __y); }
template<typename _IteratorL, typename _IteratorR>
inline typename reverse_iterator<_IteratorL>::difference_type
operator-(const reverse_iterator<_IteratorL>& __x,
const reverse_iterator<_IteratorR>& __y)
{ return __y.base() - __x.base(); }
template<typename _Container>
class back_insert_iterator
: public iterator<output_iterator_tag, void, void, void, void>
{
protected:
_Container* container;
public:
typedef _Container container_type;
explicit
back_insert_iterator(_Container& __x) : container(&__x) { }
back_insert_iterator&
operator=(typename _Container::const_reference __value)
{
container->push_back(__value);
return *this;
}
back_insert_iterator&
operator*()
{ return *this; }
back_insert_iterator&
operator++()
{ return *this; }
back_insert_iterator
operator++(int)
{ return *this; }
};
template<typename _Container>
inline back_insert_iterator<_Container>
back_inserter(_Container& __x)
{ return back_insert_iterator<_Container>(__x); }
template<typename _Container>
class front_insert_iterator
: public iterator<output_iterator_tag, void, void, void, void>
{
protected:
_Container* container;
public:
typedef _Container container_type;
explicit front_insert_iterator(_Container& __x) : container(&__x) { }
front_insert_iterator&
operator=(typename _Container::const_reference __value)
{
container->push_front(__value);
return *this;
}
front_insert_iterator&
operator*()
{ return *this; }
front_insert_iterator&
operator++()
{ return *this; }
front_insert_iterator
operator++(int)
{ return *this; }
};
template<typename _Container>
inline front_insert_iterator<_Container>
front_inserter(_Container& __x)
{ return front_insert_iterator<_Container>(__x); }
template<typename _Container>
class insert_iterator
: public iterator<output_iterator_tag, void, void, void, void>
{
protected:
_Container* container;
typename _Container::iterator iter;
public:
typedef _Container container_type;
insert_iterator(_Container& __x, typename _Container::iterator __i)
: container(&__x), iter(__i) {}
insert_iterator&
operator=(const typename _Container::const_reference __value)
{
iter = container->insert(iter, __value);
++iter;
return *this;
}
insert_iterator&
operator*()
{ return *this; }
insert_iterator&
operator++()
{ return *this; }
insert_iterator&
operator++(int)
{ return *this; }
};
template<typename _Container, typename _Iterator>
inline insert_iterator<_Container>
inserter(_Container& __x, _Iterator __i)
{
return insert_iterator<_Container>(__x,
typename _Container::iterator(__i));
}
_GLIBCXX_END_NAMESPACE
_GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx)
using std::iterator_traits;
using std::iterator;
template<typename _Iterator, typename _Container>
class __normal_iterator
{
protected:
_Iterator _M_current;
public:
typedef typename iterator_traits<_Iterator>::iterator_category
iterator_category;
typedef typename iterator_traits<_Iterator>::value_type value_type;
typedef typename iterator_traits<_Iterator>::difference_type
difference_type;
typedef typename iterator_traits<_Iterator>::reference reference;
typedef typename iterator_traits<_Iterator>::pointer pointer;
__normal_iterator() : _M_current(_Iterator()) { }
explicit
__normal_iterator(const _Iterator& __i) : _M_current(__i) { }
template<typename _Iter>
__normal_iterator(const __normal_iterator<_Iter,
typename __enable_if<
(std::__are_same<_Iter, typename _Container::pointer>::__value),
_Container>::__type>& __i)
: _M_current(__i.base()) { }
reference
operator*() const
{ return *_M_current; }
pointer
operator->() const
{ return _M_current; }
__normal_iterator&
operator++()
{
++_M_current;
return *this;
}
__normal_iterator
operator++(int)
{ return __normal_iterator(_M_current++); }
__normal_iterator&
operator--()
{
--_M_current;
return *this;
}
__normal_iterator
operator--(int)
{ return __normal_iterator(_M_current--); }
reference
operator[](const difference_type& __n) const
{ return _M_current[__n]; }
__normal_iterator&
operator+=(const difference_type& __n)
{ _M_current += __n; return *this; }
__normal_iterator
operator+(const difference_type& __n) const
{ return __normal_iterator(_M_current + __n); }
__normal_iterator&
operator-=(const difference_type& __n)
{ _M_current -= __n; return *this; }
__normal_iterator
operator-(const difference_type& __n) const
{ return __normal_iterator(_M_current - __n); }
const _Iterator&
base() const
{ return _M_current; }
};
template<typename _IteratorL, typename _IteratorR, typename _Container>
inline bool
operator==(const __normal_iterator<_IteratorL, _Container>& __lhs,
const __normal_iterator<_IteratorR, _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 bool
operator!=(const __normal_iterator<_IteratorL, _Container>& __lhs,
const __normal_iterator<_IteratorR, _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 bool
operator<(const __normal_iterator<_IteratorL, _Container>& __lhs,
const __normal_iterator<_IteratorR, _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 bool
operator>(const __normal_iterator<_IteratorL, _Container>& __lhs,
const __normal_iterator<_IteratorR, _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 bool
operator<=(const __normal_iterator<_IteratorL, _Container>& __lhs,
const __normal_iterator<_IteratorR, _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 bool
operator>=(const __normal_iterator<_IteratorL, _Container>& __lhs,
const __normal_iterator<_IteratorR, _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); }
_GLIBCXX_END_NAMESPACE
#endif