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C++ Unordered_map Library - max_bucket_count() Function
Description
The C++ function std::unordered_map::max_bucket_count() returns the maximum number of buckets that the unordered_map container can have.
This value depends on system or library implementation.
Declaration
Following is the declaration for std::unordered_map::max_bucket_count() function form std::unordered_map header.
C++11
size_type max_bucket_count() const noexcept;
Parameters
None
Return value
Return maximum number of buckets
Exceptions
This member function never throws exception.
Time complexity
Constant i.e. O(1)
Example
The following example shows the usage of std::unordered_map::max_bucket_count() function.
#include <iostream> #include <unordered_map> using namespace std; int main(void) { unordered_map<char, int> um; cout << "max_bucket_count of unordered_map = " << um.max_bucket_count() << endl; return 0; }
Let us compile and run the above program, this will produce the following result −
max_bucket_count of unordered_map = 1152921504606846975
unordered_map.htm
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