#include <stl_iterator.h>

Inheritance diagram for std::reverse_iterator< _Iterator >:

Public Types
using	difference_type
using	iterator_category
using	iterator_concept
typedef _Iterator	iterator_type
typedef __traits_type::pointer	pointer
using	reference
using	value_type

Public Member Functions
constexpr	reverse_iterator () noexcept(/conditional /)
constexpr	reverse_iterator (const reverse_iterator &__x) noexcept(/conditional /)
template<typename _Iter> requires __convertible<_Iter>
constexpr	reverse_iterator (const reverse_iterator< _Iter > &__x) noexcept(/conditional /)
constexpr	reverse_iterator (iterator_type __x) noexcept(/conditional /)
constexpr iterator_type	base () const noexcept(/conditional /)
constexpr reference	operator* () const
constexpr reverse_iterator	operator+ (difference_type __n) const
constexpr reverse_iterator &	operator++ ()
constexpr reverse_iterator	operator++ (int)
constexpr reverse_iterator &	operator+= (difference_type __n)
constexpr reverse_iterator	operator- (difference_type __n) const
constexpr reverse_iterator &	operator-- ()
constexpr reverse_iterator	operator-- (int)
constexpr reverse_iterator &	operator-= (difference_type __n)
constexpr pointer	operator-> () const
reverse_iterator &	operator= (const reverse_iterator &)=default
template<typename _Iter> requires __convertible<_Iter> && assignable_from<_Iterator&, const _Iter&>
constexpr reverse_iterator &	operator= (const reverse_iterator< _Iter > &__x) noexcept(/conditional /)
constexpr reference	operator[] (difference_type __n) const

Protected Types
typedef iterator_traits< _Iterator >	__traits_type

Protected Attributes
_Iterator	current

Friends
constexpr iter_rvalue_reference_t< _Iterator >	iter_move (const reverse_iterator &__i) noexcept(is_nothrow_copy_constructible_v< _Iterator > &&noexcept(ranges::iter_move(--std::declval< _Iterator & >())))
template<indirectly_swappable< _Iterator > _Iter2>
constexpr void	iter_swap (const reverse_iterator &__x, const reverse_iterator< _Iter2 > &__y) noexcept(is_nothrow_copy_constructible_v< _Iterator > &&is_nothrow_copy_constructible_v< _Iter2 > &&noexcept(ranges::iter_swap(--std::declval< _Iterator & >(), --std::declval< _Iter2 & >())))

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)

std::reverse_iterator::reverse_iterator

constexpr reverse_iterator() noexcept(/*conditional */)

Definition bits/stl_iterator.h:180

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 132 of file bits/stl_iterator.h.

Member Typedef Documentation

◆ __traits_type

template<typename _Iterator>

typedef iterator_traits<_Iterator> std::reverse_iterator< _Iterator >::__traits_type

protected

Definition at line 153 of file bits/stl_iterator.h.

◆ difference_type

template<typename _Iterator>

using std::reverse_iterator< _Iterator >::difference_type

Definition at line 168 of file bits/stl_iterator.h.

◆ iterator_category

template<typename _Iterator>

using std::reverse_iterator< _Iterator >::iterator_category

Definition at line 165 of file bits/stl_iterator.h.

◆ iterator_concept

template<typename _Iterator>

using std::reverse_iterator< _Iterator >::iterator_concept

Definition at line 162 of file bits/stl_iterator.h.

◆ iterator_type

template<typename _Iterator>

typedef _Iterator std::reverse_iterator< _Iterator >::iterator_type

Definition at line 156 of file bits/stl_iterator.h.

◆ pointer

template<typename _Iterator>

typedef __traits_type::pointer std::reverse_iterator< _Iterator >::pointer

Definition at line 157 of file bits/stl_iterator.h.

◆ reference

template<typename _Iterator>

using std::reverse_iterator< _Iterator >::reference

Definition at line 169 of file bits/stl_iterator.h.

◆ value_type

template<typename _Iterator>

using std::reverse_iterator< _Iterator >::value_type

Definition at line 167 of file bits/stl_iterator.h.

Constructor & Destructor Documentation

◆ reverse_iterator() [1/4]

template<typename _Iterator>

std::reverse_iterator< _Iterator >::reverse_iterator ( )

inlineconstexprnoexcept

The default constructor value-initializes member current. If it is a pointer, that means it is zero-initialized.

Definition at line 180 of file bits/stl_iterator.h.

Referenced by std::reverse_iterator< iterator >::operator+(), and std::reverse_iterator< iterator >::operator-().

◆ reverse_iterator() [2/4]

template<typename _Iterator>

std::reverse_iterator< _Iterator >::reverse_iterator ( iterator_type __x )

inlineexplicitconstexprnoexcept

This iterator will move in the opposite direction that x does.

Definition at line 189 of file bits/stl_iterator.h.

◆ reverse_iterator() [3/4]

template<typename _Iterator>

std::reverse_iterator< _Iterator >::reverse_iterator ( const reverse_iterator< _Iterator > & __x )

inlineconstexprnoexcept

The copy constructor is normal.

Definition at line 198 of file bits/stl_iterator.h.

◆ reverse_iterator() [4/4]

template<typename _Iterator>

template<typename _Iter>
requires __convertible<_Iter>

std::reverse_iterator< _Iterator >::reverse_iterator ( const reverse_iterator< _Iter > & __x )

inlineconstexprnoexcept

A reverse_iterator across other types can be copied if the underlying iterator can be converted to the type of current.

Definition at line 216 of file bits/stl_iterator.h.

Member Function Documentation

◆ base()

template<typename _Iterator>

iterator_type std::reverse_iterator< _Iterator >::base ( ) const

inlinenodiscardconstexprnoexcept

Returns: current, the iterator used for underlying work.

Definition at line 242 of file bits/stl_iterator.h.

Referenced by std::operator==().

◆ operator*()

template<typename _Iterator>

reference std::reverse_iterator< _Iterator >::operator* ( ) const

inlinenodiscardconstexpr

Returns: A reference to the value at --current

This requires that --current is dereferenceable.

Warning: This implementation requires that for an iterator of the underlying iterator type, x, a reference obtained by *x remains valid after x has been modified or destroyed. This is a bug: http://gcc.gnu.org/PR51823

Definition at line 258 of file bits/stl_iterator.h.

◆ operator+()

template<typename _Iterator>

reverse_iterator std::reverse_iterator< _Iterator >::operator+ ( difference_type __n ) const

inlinenodiscardconstexpr

Returns: A reverse_iterator that refers to current - __n

The underlying iterator must be a Random Access Iterator.

Definition at line 341 of file bits/stl_iterator.h.

◆ operator++() [1/2]

template<typename _Iterator>

reverse_iterator & std::reverse_iterator< _Iterator >::operator++ ( )

inlineconstexpr

Returns: *this

Decrements the underlying iterator.

Definition at line 290 of file bits/stl_iterator.h.

◆ operator++() [2/2]

template<typename _Iterator>

reverse_iterator std::reverse_iterator< _Iterator >::operator++ ( int )

inlineconstexpr

Returns: The original value of *this

Decrements the underlying iterator.

Definition at line 302 of file bits/stl_iterator.h.

◆ operator+=()

template<typename _Iterator>

reverse_iterator & std::reverse_iterator< _Iterator >::operator+= ( difference_type __n )

inlineconstexpr

Returns: *this

Moves the underlying iterator backwards __n steps. The underlying iterator must be a Random Access Iterator.

Definition at line 351 of file bits/stl_iterator.h.

◆ operator-()

template<typename _Iterator>

reverse_iterator std::reverse_iterator< _Iterator >::operator- ( difference_type __n ) const

inlinenodiscardconstexpr

Returns: A reverse_iterator that refers to current - __n

The underlying iterator must be a Random Access Iterator.

Definition at line 364 of file bits/stl_iterator.h.

◆ operator--() [1/2]

template<typename _Iterator>

reverse_iterator & std::reverse_iterator< _Iterator >::operator-- ( )

inlineconstexpr

Returns: *this

Increments the underlying iterator.

Definition at line 315 of file bits/stl_iterator.h.

◆ operator--() [2/2]

template<typename _Iterator>

reverse_iterator std::reverse_iterator< _Iterator >::operator-- ( int )

inlineconstexpr

Returns: A reverse_iterator with the previous value of *this

Increments the underlying iterator.

Definition at line 327 of file bits/stl_iterator.h.

◆ operator-=()

template<typename _Iterator>

reverse_iterator & std::reverse_iterator< _Iterator >::operator-= ( difference_type __n )

inlineconstexpr

Returns: *this

Moves the underlying iterator forwards __n steps. The underlying iterator must be a Random Access Iterator.

Definition at line 374 of file bits/stl_iterator.h.

◆ operator->()

template<typename _Iterator>

pointer std::reverse_iterator< _Iterator >::operator-> ( ) const

inlinenodiscardconstexpr

Returns: A pointer to the value at --current

This requires that --current is dereferenceable.

Definition at line 271 of file bits/stl_iterator.h.

◆ operator=()

template<typename _Iterator>

template<typename _Iter>
requires __convertible<_Iter> && assignable_from<_Iterator&, const _Iter&>

reverse_iterator & std::reverse_iterator< _Iterator >::operator= ( const reverse_iterator< _Iter > & __x )

inlineconstexprnoexcept

Definition at line 229 of file bits/stl_iterator.h.

◆ operator[]()

template<typename _Iterator>

reference std::reverse_iterator< _Iterator >::operator[] ( difference_type __n ) const

inlinenodiscardconstexpr

Returns: The value at current - __n - 1

The underlying iterator must be a Random Access Iterator.

Definition at line 387 of file bits/stl_iterator.h.

◆ reverse_iterator

template<typename _Iterator>

template<typename _Iter>

friend class reverse_iterator

friend

Definition at line 140 of file bits/stl_iterator.h.

◆ iter_move

template<typename _Iterator>

iter_rvalue_reference_t< _Iterator > iter_move ( const reverse_iterator< _Iterator > & __i )

friend

Definition at line 393 of file bits/stl_iterator.h.

◆ iter_swap

template<typename _Iterator>

template<indirectly_swappable< _Iterator > _Iter2>

void iter_swap	(	const reverse_iterator< _Iterator > &	__x,
		const reverse_iterator< _Iter2 > &	__y )

friend

Definition at line 403 of file bits/stl_iterator.h.

Member Data Documentation

◆ current

template<typename _Iterator>

_Iterator std::reverse_iterator< _Iterator >::current

protected

Definition at line 151 of file bits/stl_iterator.h.

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

bits/stl_iterator.h

Public Types

Public Member Functions

Protected Types

Protected Attributes

Friends

Detailed Description

Member Typedef Documentation

◆ __traits_type

◆ difference_type

◆ iterator_category

◆ iterator_concept

◆ iterator_type

◆ pointer

◆ reference

◆ value_type

Constructor & Destructor Documentation

◆ reverse_iterator() [1/4]

◆ reverse_iterator() [2/4]

◆ reverse_iterator() [3/4]

◆ reverse_iterator() [4/4]

Member Function Documentation

◆ base()

◆ operator*()

◆ operator+()

◆ operator++() [1/2]

◆ operator++() [2/2]

◆ operator+=()

◆ operator-()

◆ operator--() [1/2]

◆ operator--() [2/2]

◆ operator-=()

◆ operator->()

◆ operator=()

◆ operator[]()

Friends And Related Symbol Documentation

◆ reverse_iterator

◆ iter_move

◆ iter_swap

Member Data Documentation

◆ current