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std::unordered_multiset<Key,Hash,KeyEqual,Allocator>::max_size

From cppreference.com
 
 
Containers library
Sequence
(C++11)
Associative
Unordered associative
Adaptors
Views
(C++20)
 
 
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.

Contents

[edit] Parameters

(none)

[edit] Return value

Maximum number of elements.

[edit] Complexity

Constant.

[edit] 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.

[edit] Example

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

Possible output:

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

See also

(C++11)
returns the number of elements
(public member function) [edit]