std::multimap<Key,T,Compare,Allocator>::rend, std::multimap<Key,T,Compare,Allocator>::crend
reverse_iterator rend(); | (1) | (noexcept since C++11) |
const_reverse_iterator rend() const; | (2) | (noexcept since C++11) |
const_reverse_iterator crend() const noexcept; | (3) | (since C++11) |
Returns a reverse iterator to the element following the last element of the reversed multimap. It corresponds to the element preceding the first element of the non-reversed multimap. This element acts as a placeholder, attempting to access it results in undefined behavior.
Return value
Reverse iterator to the element following the last element.
Complexity
Constant.
Notes
libc++ backports crend() to C++98 mode.
Example
#include <chrono>
#include <iomanip>
#include <iostream>
#include <string_view>
#include <map>
using namespace std::chrono;
int main()
{
const std::multimap<year_month_day, int> messages
{
{February/17/2023, 10},
{February/17/2023, 20},
{February/16/2022, 30},
{October/22/2022, 40},
{June/14/2022, 50},
{November/23/2021, 60},
{December/10/2022, 55},
{December/12/2021, 45},
{April/1/2020, 42},
{April/1/2020, 24}
};
std::cout << "Messages received (date order is reversed):\n";
for (auto it = messages.crbegin(); it != messages.crend(); ++it)
std::cout << it->first << " : " << it->second << '\n';
}
Possible output:
Messages received (date order is reversed): 2023-02-17 : 20 2023-02-17 : 10 2022-12-10 : 55 2022-10-22 : 40 2022-06-14 : 50 2022-02-16 : 30 2021-12-12 : 45 2021-11-23 : 60 2020-04-01 : 24 2020-04-01 : 42
See also
|
(C++11) | returns a reverse iterator to the beginning (public member function) |
|
(C++14) | returns a reverse end iterator for a container or array (function template) |
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