std::multiset<Key,Compare,Allocator>::max_size

size_type max_size() const;		(until C++11)
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 <set>
 
int main()
{
    std::multiset<char> q;
    std::cout.imbue(std::locale("en_US.UTF-8"));    
    std::cout << "Maximum size of a std::multiset is " << q.max_size() << '\n';
}

Possible output:

Maximum size of a std::multiset is 576,460,752,303,423,487

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Sequence
array (C++11)
vector
vector<bool>
deque
forward_list (C++11)
list
Associative
set
multiset
map
multimap
Unordered associative
unordered_set (C++11)
unordered_multiset (C++11)
unordered_map (C++11)
unordered_multimap (C++11)
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stack
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flat_set (C++23)
flat_multiset (C++23)
flat_map (C++23)
flat_multimap (C++23)
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span (C++20)
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Iterator invalidation
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Member functions
multiset::multiset
multiset::~multiset
multiset::operator=
multiset::get_allocator
Iterators
multiset::beginmultiset::cbegin (C++11)
multiset::endmultiset::cend (C++11)
multiset::rbeginmultiset::crbegin (C++11)
multiset::rendmultiset::crend (C++11)
Capacity
multiset::empty
multiset::size
multiset::max_size
Modifiers
multiset::clear
multiset::insert
multiset::insert_range (C++23)
multiset::emplace (C++11)
multiset::emplace_hint (C++11)
multiset::erase
multiset::swap
multiset::extract (C++17)
multiset::merge (C++17)
Lookup
multiset::count
multiset::find
multiset::contains (C++20)
multiset::equal_range
multiset::lower_bound
multiset::upper_bound
Observers
multiset::key_comp
multiset::value_comp
Non-member functions
std::swap
erase_if (C++20)
operator==operator!=operator<operator>operator<=operator>=operator<=> (until C++20)(until C++20)(until C++20)(until C++20)(until C++20)(C++20)
Deduction guides(C++17)