std::unordered_multimap<Key,T,Hash,KeyEqual,Allocator>::end, std::unordered_multimap<Key,T,Hash,KeyEqual,Allocator>::cend
iterator end() noexcept; |
(since C++11) | |
const_iterator end() const noexcept; |
(since C++11) | |
const_iterator cend() const noexcept; |
(since C++11) |
Returns an iterator to the element following the last element of the unordered_multimap.
This element acts as a placeholder; attempting to access it results in undefined behavior.
Parameters
(none).
Return value
Iterator to the element following the last element.
Complexity
Constant.
Example
#include <unordered_map>
#include <algorithm>
#include <cassert>
#include <iostream>
#include <string>
#include <utility>
int main()
{
auto show_node = [](const std::pair<std::string, std::string>& node) {
std::cout << node.first << " : " << node.second << '\n';
};
std::unordered_multimap<std::string, std::string> lemmas;
assert(lemmas.begin() == lemmas.end()); // OK
assert(lemmas.cbegin() == lemmas.cend()); // OK
lemmas.insert({ "1. ∀x ∈ N ∃y ∈ N", "x ≤ y" });
show_node(*lemmas.cbegin());
assert(lemmas.begin() != lemmas.end()); // OK
assert(lemmas.cbegin() != lemmas.cend()); // OK
lemmas.begin()->second = "x < y";
show_node(*lemmas.cbegin());
lemmas.insert({ "2. ∀x,y ∈ N", "x = y V x ≠ y" });
show_node(*lemmas.cbegin());
lemmas.insert({ "3. ∀x ∈ N ∃y ∈ N", "y = x + 1" });
show_node(*lemmas.cbegin());
std::cout << "lemmas: \n";
std::for_each(lemmas.cbegin(), lemmas.cend(),
[&](const auto& n) { show_node(n); });
std::cout << "\n";
}
Possible output:
1. ∀x ∈ N ∃y ∈ N : x ≤ y 1. ∀x ∈ N ∃y ∈ N : x < y 2. ∀x,y ∈ N : x = y V x ≠ y 3. ∀x ∈ N ∃y ∈ N : y = x + 1 lemmas: 3. ∀x ∈ N ∃y ∈ N : y = x + 1 1. ∀x ∈ N ∃y ∈ N : x < y 2. ∀x,y ∈ N : x = y V x ≠ y
See also
|
(C++11)
|
returns an iterator to the beginning (public member function) |
|
(C++11)(C++14)
|
returns an iterator to the end of a container or array (function template) |
© cppreference.com
Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.
https://en.cppreference.com/w/cpp/container/unordered_multimap/end
