namespace std {
template <class 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> {
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;
reverse_iterator();
explicit reverse_iterator(Iterator x);
template <class U> reverse_iterator(const reverse_iterator<U>& u);
template <class U> reverse_iterator& operator=(const reverse_iterator<U>& u);
Iterator base() const; reference operator*() const;
pointer operator->() const;
reverse_iterator& operator++();
reverse_iterator operator++(int);
reverse_iterator& operator--();
reverse_iterator operator--(int);
reverse_iterator operator+ (difference_type n) const;
reverse_iterator& operator+=(difference_type n);
reverse_iterator operator- (difference_type n) const;
reverse_iterator& operator-=(difference_type n);
unspecified operator[](difference_type n) const;
protected:
Iterator current;
};
template <class Iterator1, class Iterator2>
bool operator==(
const reverse_iterator<Iterator1>& x,
const reverse_iterator<Iterator2>& y);
template <class Iterator1, class Iterator2>
bool operator<(
const reverse_iterator<Iterator1>& x,
const reverse_iterator<Iterator2>& y);
template <class Iterator1, class Iterator2>
bool operator!=(
const reverse_iterator<Iterator1>& x,
const reverse_iterator<Iterator2>& y);
template <class Iterator1, class Iterator2>
bool operator>(
const reverse_iterator<Iterator1>& x,
const reverse_iterator<Iterator2>& y);
template <class Iterator1, class Iterator2>
bool operator>=(
const reverse_iterator<Iterator1>& x,
const reverse_iterator<Iterator2>& y);
template <class Iterator1, class Iterator2>
bool operator<=(
const reverse_iterator<Iterator1>& x,
const reverse_iterator<Iterator2>& y);
template <class Iterator1, class Iterator2>
auto operator-(
const reverse_iterator<Iterator1>& x,
const reverse_iterator<Iterator2>& y) -> decltype(y.base() - x.base());
template <class Iterator>
reverse_iterator<Iterator> operator+(
typename reverse_iterator<Iterator>::difference_type n,
const reverse_iterator<Iterator>& x);
template <class Iterator>
reverse_iterator<Iterator> make_reverse_iterator(Iterator i);
}
24.5.1.3 reverse_iterator operations [reverse.iter.ops] 24.5.1.3.1 reverse_iterator constructor [reverse.iter.cons]
Effects: Value initializes current. Iterator operations applied to the resulting iterator have defined behavior if and only if the corresponding operations are defined on a value-initialized iterator of type Iterator.
explicit reverse_iterator(Iterator x);
Effects: Initializes current with x.
template <class U> reverse_iterator(const reverse_iterator<U> &u);
Effects: Initializes current with u.current.
24.5.1.3.2 reverse_iterator::operator= [reverse.iter.op=] template <class U> reverse_iterator& operator=(const reverse_iterator<U>& u);
Effects: Assigns u.base() to current.
24.5.1.3.6 operator++ [reverse.iter.op++] reverse_iterator& operator++();
reverse_iterator operator++(int);
Effects:
reverse_iterator tmp = *this; --current; return tmp;24.5.1.3.7 operator-- [reverse.iter.op--]
reverse_iterator& operator--();
reverse_iterator operator--(int);
Effects:
reverse_iterator tmp = *this; ++current; return tmp;24.5.1.3.8 operator+ [reverse.iter.op+]
reverse_iterator operator+(typename reverse_iterator<Iterator>::difference_type n) const;
Returns: reverse_iterator(current-n).
24.5.1.3.10 operator- [reverse.iter.op-] reverse_iterator operator-(typename reverse_iterator<Iterator>::difference_type n) const;
Returns: reverse_iterator(current+n).
24.5.1.3.13 operator== [reverse.iter.op==] template <class Iterator1, class Iterator2> bool operator==( const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y);
Returns: x.current == y.current.
24.5.1.3.14 operator< [reverse.iter.op<] template <class Iterator1, class Iterator2> bool operator<( const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y);
Returns: x.current > y.current.
24.5.1.3.15 operator!= [reverse.iter.op!=] template <class Iterator1, class Iterator2> bool operator!=( const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y);
Returns: x.current != y.current.
24.5.1.3.16 operator> [reverse.iter.op>] template <class Iterator1, class Iterator2> bool operator>( const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y);
Returns: x.current < y.current.
24.5.1.3.17 operator>= [reverse.iter.op>=] template <class Iterator1, class Iterator2> bool operator>=( const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y);
Returns: x.current <= y.current.
24.5.1.3.18 operator<= [reverse.iter.op<=] template <class Iterator1, class Iterator2> bool operator<=( const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y);
Returns: x.current >= y.current.
24.5.1.3.19 operator- [reverse.iter.opdiff] template <class Iterator1, class Iterator2> auto operator-( const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y) -> decltype(y.base() - x.base());
Returns: y.current - x.current.
24.5.1.3.20 operator+ [reverse.iter.opsum] template <class Iterator> reverse_iterator<Iterator> operator+( typename reverse_iterator<Iterator>::difference_type n, const reverse_iterator<Iterator>& x);
Returns: reverse_iterator<Iterator> (x.current - n).
24.5.1.3.21 Non-member function make_reverse_iterator() [reverse.iter.make] template <class Iterator> reverse_iterator<Iterator> make_reverse_iterator(Iterator i);
Returns: reverse_iterator<Iterator>(i).
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