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std::reverse_iterator<Iter>::operator*,->

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< cpp‎ | iterator‎ | reverse iterator

Compiler support

Freestanding and hosted

Standard library

Standard library headers

Named requirements

Feature test macros (C++20)

Language support library

Concepts library (C++20)

Diagnostics library

Memory management library

Metaprogramming library (C++11)

General utilities library

Containers library

Iterators library

Ranges library (C++20)

Algorithms library

Strings library

Text processing library

Numerics library

Date and time library

Input/output library

Filesystem library (C++17)

Concurrency support library (C++11)

Execution control library (C++26)

Technical specifications

External libraries

Iterator library

Iterator concepts

indirectly_readable

(C++20)

indirectly_writable

(C++20)

weakly_incrementable

(C++20)

(C++20)

is-integer-like
is-signed-integer-like

(C++20)(C++20)

(C++20)

sized_sentinel_for

(C++20)

(C++20)

output_iterator

(C++20)

input_or_output_iterator

(C++20)

forward_iterator

(C++20)

bidirectional_iterator

(C++20)

random_access_iterator

(C++20)

contiguous_iterator

(C++20)

Iterator primitives

input_iterator_tagoutput_iterator_tagforward_iterator_tagbidirectional_iterator_tagrandom_access_iterator_tagcontiguous_iterator_tag

(C++20)

iter_value_titer_difference_titer_reference_titer_const_reference_titer_rvalue_reference_titer_common_reference_t

(C++20)(C++20)(C++20)(C++23)(C++20)(C++20)

(deprecated in C++17)

iterator_traits

incrementable_traits

(C++20)

indirectly_readable_traits

(C++20)

Algorithm concepts and utilities Indirect callable concepts

indirectly_unary_invocableindirectly_regular_unary_invocable

(C++20)(C++20)

indirect_unary_predicate

(C++20)

indirect_binary_predicate

(C++20)

indirect_equivalence_relation

(C++20)

indirect_strict_weak_order

(C++20)

Common algorithm requirements

indirectly_movable

(C++20)

indirectly_movable_storable

(C++20)

indirectly_copyable

(C++20)

indirectly_copyable_storable

(C++20)

indirectly_swappable

(C++20)

indirectly_comparable

(C++20)

(C++20)

(C++20)

(C++20)

indirect_result_t

(C++20)

(C++20)

projected_value_t

(C++26)

Iterator adaptors

reverse_iterator

make_reverse_iterator

(C++14)

(C++11)

make_move_iterator

(C++11)

default_sentinel_tdefault_sentinel

(C++20)(C++20)

unreachable_sentinel_tunreachable_sentinel

(C++20)(C++20)

front_insert_iterator

back_insert_iterator

insert_iterator

(C++20)

common_iterator

(C++20)

counted_iterator

(C++20)

basic_const_iterator

(C++23)

(C++23)

(C++23)

make_const_iterator

(C++23)

make_const_sentinel

(C++23)

Stream iterators

istream_iterator

ostream_iterator

istreambuf_iterator

ostreambuf_iterator

Iterator customization points

ranges::iter_move

(C++20)

ranges::iter_swap

(C++20)

Iterator operations

(C++11)

(C++11)

ranges::advance

(C++20)

ranges::distance

(C++20)

(C++20)

(C++20)

(C++11)(C++14)

(C++14)(C++14)

(C++11)(C++14)

(C++14)(C++14)

(C++17)(C++20)

(C++17)

(C++17)

std::reverse_iterator

Member functions

reverse_iterator::reverse_iterator

reverse_iterator::operator=

reverse_iterator::base

reverse_iterator::operator*reverse_iterator::operator->

reverse_iterator::operator[]

reverse_iterator::operator++reverse_iterator::operator+reverse_iterator::operator+=reverse_iterator::operator--reverse_iterator::operator-reverse_iterator::operator-=

Non-member functions

operator==operator!=operator<operator<=operator>operator>=operator<=>

(C++20)

(C++20)

(C++20)

make_reverse_iterator

(C++14)

reference operator*() const;

(1) (constexpr since C++17)

(2)

pointer operator->() const;

(constexpr since C++17)
(until C++20)

constexpr pointer operator->() const

requires (std::is_pointer_v <Iter> ||

requires (const Iter i) { i.operator->(); });

(since C++20)

Returns a reference or pointer to the element previous to current .

Member function	Equivalent to
operator*	Iter tmp = `current` ; return *--tmp;
operator->	return &(operator()); (until C++11) return std::addressof (operator()); (since C++11) (until C++20) return `current` - 1; if `Iter` is a pointer type return std::prev (`current` ).operator->(); otherwise (since C++20)

Contents

[edit] Return value

As described above.

[edit] Example

Run this code

#include <complex>
#include <iostream>
#include <iterator>
#include <vector>
 
int main()
{
 using RI0 = std::reverse_iterator <int*>;
 int a[]{0, 1, 2, 3};
 RI0 r0{std::rbegin (a)};
 std::cout << "*r0 = " << *r0 << '\n';
 *r0 = 42;
 std::cout << "a[3] = " << a[3] << '\n';
 
 using RI1 = std::reverse_iterator <std::vector <int>::iterator>;
 std::vector <int> vi{0, 1, 2, 3};
 RI1 r1{vi.rend() - 2};
 std::cout << "*r1 = " << *r1 << '\n';
 
 using RI2 = std::reverse_iterator <std::vector <std::complex <double>>::iterator>;
 std::vector <std::complex <double>> vc{{1, 2}, {3, 4}, {5, 6}, {7, 8}};
 RI2 r2{vc.rbegin() + 1};
 std::cout << "vc[2] = (" << r2->real() << ',' << r2->imag() << ")\n";
}

Output:

*r0 = 3
a[3] = 42
*r1 = 1
vc[2] = (5,6)

[edit] Defect reports

The following behavior-changing defect reports were applied retroactively to previously published C++ standards.

DR	Applied to	Behavior as published	Correct behavior
LWG 2188	C++11	operator-> used `&` to take address	uses std::addressof instead

[edit] See also

accesses an element by index
(public member function) [edit]

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