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/C++std::multimap<Key,T,Compare,Allocator>::rbegin, std::multimap<Key,T,Compare,Allocator>::crbegin
| (1) | ||
reverse_iterator rbegin(); | (until C++11) | |
reverse_iterator rbegin() noexcept; | (since C++11) | |
| (2) | ||
const_reverse_iterator rbegin() const; | (until C++11) | |
const_reverse_iterator rbegin() const noexcept; | (since C++11) | |
const_reverse_iterator crbegin() const noexcept; | (3) | (since C++11) |
Returns a reverse iterator to the first element of the reversed multimap. It corresponds to the last element of the non-reversed multimap. If the multimap is empty, the returned iterator is equal to rend().
Parameters
(none).
Return value
Reverse iterator to the first element.
Complexity
Constant.
Example
#include <algorithm>
#include <iostream>
#include <map>
#include <string>
int main()
{
std::multimap<std::string, int> multimap
{
{ "█", 1 },
{ "▒", 5 },
{ "░", 3 },
{ "▓", 7 },
{ "▓", 8 },
{ "░", 4 },
{ "▒", 6 },
{ "█", 2 },
};
std::cout << "Print out in reverse order using const reverse iterators:\n";
std::for_each(multimap.crbegin(), multimap.crend(),
[](std::pair<const std::string, int> const& e)
{
std::cout << "{ \"" << e.first << "\", " << e.second << " };\n";
});
multimap.rbegin()->second = 42; // OK: non-const value is modifiable
// multimap.crbegin()->second = 42; // Error: cannot modify the const value
}Possible output:
Print out in reverse order using const reverse iterators:
{ "▓", 8 };
{ "▓", 7 };
{ "▒", 6 };
{ "▒", 5 };
{ "░", 4 };
{ "░", 3 };
{ "█", 2 };
{ "█", 1 };See also
|
(C++11) | returns a reverse iterator to the end (public member function) |
|
(C++14) | returns a reverse iterator to the beginning of a container or array (function template) |
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