NAME

std::unordered_multimap::max_size - std::unordered_multimap::max_size

Synopsis

size_type max_size() const noexcept; (since C++11)

Returns the maximum number of elements the container is able to hold due to system
or library implementation limitations, i.e. std::distance(begin(), end()) for the
largest container.

Parameters

(none)

Return value

Maximum number of elements.

Complexity

Constant.

Notes

This value typically reflects the theoretical limit on the size of the container, at
most std::numeric_limits<difference_type>::max(). At runtime, the size of the
container may be limited to a value smaller than max_size() by the amount of RAM
available.

Example

// Run this code

#include <iostream>
#include <locale>
#include <unordered_map>

int main()
{
std::unordered_multimap<char, char> q;
std::cout.imbue(std::locale("en_US.UTF-8"));
std::cout << "Maximum size of a std::unordered_multimap is " << q.max_size() << '\n';
}

Possible output:

Maximum size of a std::unordered_multimap is 768,614,336,404,564,650