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std::unorde...ucket_count(3)   C++ Standard Libary  std::unorde...ucket_count(3)

NAME
     std::unordered_set::max_bucket_count - std::unordered_set::max_bucket_count

Synopsis
	size_type max_bucket_count() const;  (since C++11)

	Returns  the maximum number of buckets the container is able to hold due
     to system or
	library implementation limitations.

Parameters
	(none)

Return value
	Maximum number of buckets.

Complexity
	Constant.

Example
     // Run this code

      #include <iostream>
      #include <unordered_set>

      int main()
      {
	  struct  Ha  {  std::size_t   operator()(long	 x)   const   {   return
     std::hash<long>{}(x); }; };

	  auto c1 = std::unordered_set<char>{};
	  auto c2 = std::unordered_set<long>{};
	  auto c3 = std::unordered_set<long, std::hash<int>>{};
	  auto c4 = std::unordered_set<long, Ha>{};

	  std::cout
	      << "Max bucket count of\n" << std::hex << std::showbase
	      << "c1: " << c1.max_bucket_count() << '\n'
	      << "c2: " << c2.max_bucket_count() << '\n'
	      << "c3: " << c3.max_bucket_count() << '\n'
	      << "c4: " << c4.max_bucket_count() << '\n'
	      ;
      }

Possible output:
      Max bucket count of
      c1: 0xfffffffffffffff
      c2: 0xfffffffffffffff
      c3: 0xfffffffffffffff
      c4: 0xaaaaaaaaaaaaaaa

See also
	bucket_count returns the number of buckets
		     (public member function)

http://cppreference.com 	   2024.06.10	    std::unorde...ucket_count(3)
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