vector::get_allocator - C++ Reference

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

Example

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

using namespace std;

int main ()
{
  vector<int> myvector;
  int * p;
  unsigned int i;

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

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

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

  myvector.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 vector. Output:

The allocated array contains: 0 1 2 3 4

Complexity

Constant.


		C++ : Reference : STL Containers : vector : get_allocator