set::get_allocator - C++ Reference

set::get_allocator

public member function

allocator_type get_allocator() const;

Get allocator

Returns the allocator object used to constuct the container.

Parameters

none

Return Value

The allocator.

Member type allocator_type is defined to the same as the third template parameter used to instantitate this specific set class (its Allocator type).

Example

// set::get_allocator
#include <iostream>
#include <set>

using namespace std;

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

  // allocate an array of 5 elements using myset's allocator:
  p=myset.get_allocator().allocate(5);

  // assign some values to array
  for (i=0; i<5; i++) p[i]=(i+1)*10;

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

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

  return 0;
}

The example shows an elaborate way to allocate memory for an array of ints using the same allocator used by the container.
Output:

The allocated array contains: 10 20 30 40 50

Complexity

Constant.


		C++ : Reference : STL Containers : set : get_allocator