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.
(none).
Maximum number of buckets.
Constant.
#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
|
(C++11) | returns the number of buckets (public member function) |
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