public member function
<unordered_map>

std::unordered_map::max_size

size_type max_size() const noexcept;
Return maximum size
Returns the maximum number of elements that the unordered_map container can hold.

This is the maximum potential number of elements the container can hold due to system constraints or limitations on its library implementation.

Parameters

none

Return Value

The maximum number of elements the object can hold as content.

Member type size_type is an unsigned integral type.

Example

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// unordered_map limits
#include <iostream>
#include <unordered_map>

int main ()
{
  std::unordered_map<int,int> mymap;

  std::cout << "max_size = " << mymap.max_size() << std::endl;
  std::cout << "max_bucket_count = " << mymap.max_bucket_count() << std::endl;
  std::cout << "max_load_factor = " << mymap.max_load_factor() << std::endl;

  return 0;
}


Possible output:
max_size = 357913941
max_bucket_count = 357913941
max_load_factor = 1

Complexity

Constant.

Iterator validity

No changes.

See also

  • 9281021542 2018-02-20
  • 632231541 2018-02-20
  • 9751491540 2018-02-20
  • 8333621539 2018-02-20
  • 995001538 2018-02-20
  • 6477441537 2018-02-20
  • 511981536 2018-02-19
  • 2072881535 2018-02-19
  • 6024461534 2018-02-19
  • 7594061533 2018-02-19
  • 9311341532 2018-02-19
  • 4928331531 2018-02-19
  • 38561530 2018-02-19
  • 7776611529 2018-02-19
  • 3038041528 2018-02-19
  • 9566341527 2018-02-19
  • 3936031526 2018-02-19
  • 9531111525 2018-02-19
  • 291211524 2018-02-19
  • 8962001523 2018-02-19