std::flat_multimap<Key,T,Compare,KeyContainer,MappedContainer>:: rbegin, std::flat_multimap<Key,T,Compare,KeyContainer,MappedContainer>:: crbegin

Returns a reverse iterator to the first element of the reversed flat_multimap . It corresponds to the last element of the non-reversed flat_multimap . If the flat_multimap is empty, the returned iterator is equal to rend() .

Parameters

(none)

Return value

Reverse iterator to the first element.

Complexity

Constant.

Notes

The underlying iterator of the returned reverse iterator is the end iterator . Hence the returned iterator is invalidated if and when the end iterator is invalidated.

Example

#include <algorithm>
#include <iostream>
#include <string>
#include <flat_map>
 
int main()
{
    std::flat_multimap<std::string, int> map
    {
        {"█", 1},
        {"▒", 5},
        {"░", 3},
        {"▓", 7},
        {"▓", 8},
        {"░", 4},
        {"▒", 6},
        {"█", 2}
    };
 
    std::cout << "Print out in reverse order using const reverse iterators:\n";
    std::for_each(map.crbegin(), map.crend(),
        [](std::pair<const std::string, int> const& e)
        {
            std::cout << "{ \"" << e.first << "\", " << e.second << " };\n";
        });
 
    map.rbegin()->second = 42; // OK: non-const value is modifiable
//  map.crbegin()->second = 42; // Error: cannot modify the const value
}

Print out in reverse order using const reverse iterators:
{ "▓", 8 };
{ "▓", 7 };
{ "▒", 6 };
{ "▒", 5 };
{ "░", 4 };
{ "░", 3 };
{ "█", 2 };
{ "█", 1 };

See also