unordered_multiset get_allocator in C++ STL (original) (raw)

Last Updated : 11 Oct, 2018

The unordered_multiset::get_allocator() function is a STL function in C++ which is used to include unorder_multiset header file in program. This function gets the stored allocator object and returns the allocator object which is used to construct the container. It is a public member function.Syntax:

allocator_type get_allocator() const;

Here allocator_type is the type of the allocator which is used by the container.Parameters: It does not accepts any parameter.Return Value: It returns the allocator type. Below program illustrate get_allocator method in C++ STL: Program:

CPP `

// c++ program to understand 'unordered_multiset_get_allocator' #include #include using namespace std;

// main() method int main() {

//'m' is object of 'unordered_set'
unordered_multiset<int> m;

//'allocator_type' is inherit in 'unordered_multiset'
//'t' is object of 'allocator_type'
//'get_allocator()' is member of 'unordered_set'
unordered_multiset<int>::allocator_type t = m.get_allocator();

// Comparing the Allocator with 'Pair<int, int>'
cout << "allocator is : "
    << boolalpha << (t == allocator<std::pair<int, int> >());

return (0);

}

`

Output:

allocator is : true

Complexity: It takes constant time of complexity to perform operation.