std::reverse_iterator<Iter>::operator=

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C++
Iterator library
Iterator concepts
Iterator primitives
Algorithm concepts and utilities
Indirect callable concepts
Common algorithm requirements
(C++20)
(C++20)
(C++20)
Utilities
(C++20)
Iterator adaptors
Range access
(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
template < class U >
reverse_iterator& operator= ( const reverse_iterator<U> & other ) ;
(constexpr since C++17)

Assigns other.current to current

This overload participates in overload resolution only if std::is_same_v<U, Iter> is false and both std::convertible_to < const U&, Iter> and std::assignable_from <Iter&, const U& >

(since C++20)

Parameters

other - iterator adaptor to assign

Return value

*this

Example

Run this code
#include <iostream>
#include <iterator>
 
int main()
{
    const int a1[]{0, 1, 2};
    int a2[]{0, 1, 2, 3};
    short a3[]{40, 41, 42};
 
    std::reverse_iterator<const int*> it1{std::crbegin(a1)};
    it1 = std::reverse_iterator<int*>{std::rbegin(a2)};   // OK
//  it1 = std::reverse_iterator<short*>{std::rbegin(a3)}; // Compilation error:
                                                          // incompatible pointer types
    std::reverse_iterator<const short*> it2{nullptr};
    it2 = std::rbegin(a3); // OK
//  it2 = std::begin(a3);  // Compilation error: no viable operator= overload
    std::cout << *it2 << '\n';
}

Output: 

42

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 280 C++98 heterogeneous assignment was not allowed allowed
LWG 3435 C++20 the converting assignment operator was not constrained constrained

See also

 constructs a new iterator adaptor
(public member function)
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