# std::reverse_iterator< Iterator > Class Template Reference

`#include <stl_iterator.h>`

Inheritance diagram for std::reverse_iterator< Iterator >:

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Collaboration diagram for std::reverse_iterator< Iterator >:

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List of all members.

## Public Types

typedef iterator_traits< Iterator >::difference_type | difference_type
| Distance between iterators is represented as this type.
typedef iterator_traits< Iterator >::reference | reference
| This type represents a reference-to-value_type.
typedef iterator_traits< Iterator >::pointer | pointer
| This type represents a pointer-to-value_type.
typedef iterator_traits< Iterator >::iterator_category | iterator_category
| One of the tag types.
typedef iterator_traits< Iterator >::value_type | value_type
| The type "pointed to" by the iterator.

## Public Member Functions

| reverse_iterator ()
| reverse_iterator (iterator_type x)
| reverse_iterator (const reverse_iterator &x)
template<typename Iter> | reverse_iterator (const reverse_iterator< Iter > &x)
iterator_type | 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)
reference | operator[] (difference_type n) const

## Detailed Description

### template<typename Iterator>
class std::reverse_iterator< Iterator >

"Bidirectional and random access iterators have corresponding reverse iterator adaptors that iterate through the data structure in the opposite direction. They have the same signatures as the corresponding iterators. The fundamental relation between a reverse iterator and its corresponding iterator `i` is established by the identity:

          &*(reverse_iterator(i)) == &*(i - 1)

This mapping is dictated by the fact that while there is always a pointer past the end of an array, there might not be a valid pointer before the beginning of an array." [24.4.1]/1,2

Reverse iterators can be tricky and surprising at first. Their semantics make sense, however, and the trickiness is a side effect of the requirement that the iterators must be safe.

Definition at line 90 of file stl_iterator.h.

## Member Typedef Documentation

template<typename Iterator>
typedef iterator_traits<Iterator>::difference_type std::reverse_iterator< Iterator >::difference_type

| Distance between iterators is represented as this type. Reimplemented from std::iterator< iterator_traits< Iterator >::iterator_category, iterator_traits< Iterator >::value_type, iterator_traits< Iterator >::difference_type, iterator_traits< Iterator >::pointer, iterator_traits< Iterator >::reference >. Definition at line 103 of file stl_iterator.h.

typedef iterator_traits< Iterator >::iterator_category std::iterator< iterator_traits< Iterator >::iterator_category , iterator_traits< Iterator >::value_type , iterator_traits< Iterator >::difference_type , iterator_traits< Iterator >::pointer , iterator_traits< Iterator >::reference >::iterator_category`[inherited]`

| One of the tag types. Definition at line 109 of file stl_iterator_base_types.h.

template<typename Iterator>
typedef iterator_traits<Iterator>::pointer std::reverse_iterator< Iterator >::pointer

| This type represents a pointer-to-value_type. Reimplemented from std::iterator< iterator_traits< Iterator >::iterator_category, iterator_traits< Iterator >::value_type, iterator_traits< Iterator >::difference_type, iterator_traits< Iterator >::pointer, iterator_traits< Iterator >::reference >. Definition at line 105 of file stl_iterator.h.

template<typename Iterator>
typedef iterator_traits<Iterator>::reference std::reverse_iterator< Iterator >::reference

| This type represents a reference-to-value_type. Reimplemented from std::iterator< iterator_traits< Iterator >::iterator_category, iterator_traits< Iterator >::value_type, iterator_traits< Iterator >::difference_type, iterator_traits< Iterator >::pointer, iterator_traits< Iterator >::reference >. Definition at line 104 of file stl_iterator.h.

typedef iterator_traits< Iterator >::value_type std::iterator< iterator_traits< Iterator >::iterator_category , iterator_traits< Iterator >::value_type , iterator_traits< Iterator >::difference_type , iterator_traits< Iterator >::pointer , iterator_traits< Iterator >::reference >::value_type`[inherited]`

| The type "pointed to" by the iterator. Definition at line 111 of file stl_iterator_base_types.h.

## Constructor & Destructor Documentation

template<typename Iterator>
std::reverse_iterator< Iterator >::reverse_iterator | ( |  | ) | `[inline]`

| The default constructor default-initializes member `current`. If it is a pointer, that means it is zero-initialized. Definition at line 114 of file stl_iterator.h. Referenced by std::reverse_iterator< Iterator >::operator+=(), and std::reverse_iterator< Iterator >::operator--().

template<typename Iterator>
std::reverse_iterator< Iterator >::reverse_iterator | ( | iterator_type | x | ) | `[inline, explicit]`

| This iterator will move in the opposite direction that `x` does. Definition at line 120 of file stl_iterator.h.

template<typename Iterator>
std::reverse_iterator< Iterator >::reverse_iterator | ( | const reverse_iterator< Iterator > & | x | ) | `[inline]`

| The copy constructor is normal. Definition at line 125 of file stl_iterator.h.

template<typename Iterator>
template<typename Iter>
std::reverse_iterator< Iterator >::reverse_iterator | ( | const reverse_iterator< Iter > & | x | ) | `[inline]`

| A reverse_iterator across other types can be copied in the normal fashion. Definition at line 133 of file stl_iterator.h. References std::reverse_iterator< Iterator >::base().

## Member Function Documentation

template<typename Iterator>
iterator_type std::reverse_iterator< Iterator >::base | ( |  | ) | const`[inline]`

Returns:
  `current`, the iterator used for underlying work.

Definition at line 140 of file stl_iterator.h.

Referenced by std::operator<=(), std::operator>=(), std::reverse_iterator< Iterator >::operator[](), and std::reverse_iterator< Iterator >::reverse_iterator().

template<typename Iterator>
reference std::reverse_iterator< Iterator >::operator * | ( |  | ) | const`[inline]`

Returns:
  TODO

Todo:
  Doc me! See docs/doxygen/TODO and http://gcc.gnu.org/ml/libstdc++/2002-02/msg00003.html for more.

Definition at line 150 of file stl_iterator.h.

template<typename Iterator>
reverse_iterator std::reverse_iterator< Iterator >::operator+ | ( | difference_type | n | ) | const`[inline]`

Returns:
  TODO

Todo:
  Doc me! See docs/doxygen/TODO and http://gcc.gnu.org/ml/libstdc++/2002-02/msg00003.html for more.

Definition at line 226 of file stl_iterator.h.

References std::reverse_iterator< Iterator >::operator+=().

template<typename Iterator>
reverse_iterator std::reverse_iterator< Iterator >::operator++ | ( | int |  | ) | `[inline]`

Returns:
  TODO

Todo:
  Doc me! See docs/doxygen/TODO and http://gcc.gnu.org/ml/libstdc++/2002-02/msg00003.html for more.

Definition at line 186 of file stl_iterator.h.

template<typename Iterator>
reverse_iterator& std::reverse_iterator< Iterator >::operator++ | ( |  | ) | `[inline]`

Returns:
  TODO

Todo:
  Doc me! See docs/doxygen/TODO and http://gcc.gnu.org/ml/libstdc++/2002-02/msg00003.html for more.

Definition at line 173 of file stl_iterator.h.

template<typename Iterator>
reverse_iterator& std::reverse_iterator< Iterator >::operator+= | ( | difference_type | n | ) | `[inline]`

Returns:
  TODO

Todo:
  Doc me! See docs/doxygen/TODO and http://gcc.gnu.org/ml/libstdc++/2002-02/msg00003.html for more.

Definition at line 236 of file stl_iterator.h.

References std::reverse_iterator< Iterator >::reverse_iterator().

Referenced by std::reverse_iterator< Iterator >::operator+().

template<typename Iterator>
reverse_iterator std::reverse_iterator< Iterator >::operator- | ( | difference_type | n | ) | const`[inline]`

Returns:
  TODO

Todo:
  Doc me! See docs/doxygen/TODO and http://gcc.gnu.org/ml/libstdc++/2002-02/msg00003.html for more.

Definition at line 249 of file stl_iterator.h.

References std::reverse_iterator< Iterator >::operator-=().

template<typename Iterator>
reverse_iterator std::reverse_iterator< Iterator >::operator-- | ( | int |  | ) | `[inline]`

Returns:
  TODO

Todo:
  Doc me! See docs/doxygen/TODO and http://gcc.gnu.org/ml/libstdc++/2002-02/msg00003.html for more.

Definition at line 212 of file stl_iterator.h.

References std::reverse_iterator< Iterator >::reverse_iterator().

template<typename Iterator>
reverse_iterator& std::reverse_iterator< Iterator >::operator-- | ( |  | ) | `[inline]`

Returns:
  TODO

Todo:
  Doc me! See docs/doxygen/TODO and http://gcc.gnu.org/ml/libstdc++/2002-02/msg00003.html for more.

Definition at line 200 of file stl_iterator.h.

template<typename Iterator>
reverse_iterator& std::reverse_iterator< Iterator >::operator-= | ( | difference_type | n | ) | `[inline]`

Returns:
  TODO

Todo:
  Doc me! See docs/doxygen/TODO and http://gcc.gnu.org/ml/libstdc++/2002-02/msg00003.html for more.

Definition at line 259 of file stl_iterator.h.

References std::reverse_iterator< Iterator >::operator[]().

Referenced by std::reverse_iterator< Iterator >::operator-().

template<typename Iterator>
pointer std::reverse_iterator< Iterator >::operator-> | ( |  | ) | const`[inline]`

Returns:
  TODO

Todo:
  Doc me! See docs/doxygen/TODO and http://gcc.gnu.org/ml/libstdc++/2002-02/msg00003.html for more.

Definition at line 163 of file stl_iterator.h.

template<typename Iterator>
reference std::reverse_iterator< Iterator >::operator[] | ( | difference_type | n | ) | const`[inline]`

Returns:
  TODO

Todo:
  Doc me! See docs/doxygen/TODO and http://gcc.gnu.org/ml/libstdc++/2002-02/msg00003.html for more.

Definition at line 272 of file stl_iterator.h.

References std::reverse_iterator< Iterator >::base().

Referenced by std::reverse_iterator< Iterator >::operator-=().

The documentation for this class was generated from the following file:

- stl_iterator.h