C++ Set Library - get_allocator Function

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Description

It returns a copy of the allocator object associated with the set.

Declaration

Following are the ways in which std::set::get_allocator works in various C++ versions.

C++98

allocator_type get_allocator() const;

C++11

allocator_type get_allocator() const noexcept;

Return value

It returns a copy of the allocator object associated with the set.

Exceptions

If an exception is thrown, there are no changes in the container.

Time complexity

Time complexity depens on logarithmic.

Example

The following example shows the usage of std::set::get_allocator.

#include <iostream>
#include <set>

int main () {
   std::set<int> myset;
   int * p;
   unsigned int i;

   p = myset.get_allocator().allocate(5);
 
   for (i = 0; i < 5; i++) p[i]=(i+1)*10;

   std::cout << "The allocated array contains:";
   for (i = 0; i < 5; i++) std::cout << ' ' << p[i];
   std::cout << '\n';

   myset.get_allocator().deallocate(p,5);

   return 0;
}

The above program will compile and execute properly.

The allocated array contains: 10 20 30 40 50