c++ vector allocator example
// vector::get_allocator
#include <iostream>
#include <vector>
int main ()
{
std::vector<int> myvector;
int * p;
unsigned int i;
// allocate an array with space for 5 elements using vector's allocator:
p = myvector.get_allocator().allocate(5);
// construct values in-place on the array:
for (i=0; i<5; i++) myvector.get_allocator().construct(&p[i],i);
std::cout << "The allocated array contains:";
for (i=0; i<5; i++) std::cout << ' ' << p[i];
std::cout << '\n';
// destroy and deallocate:
for (i=0; i<5; i++) myvector.get_allocator().destroy(&p[i]);
myvector.get_allocator().deallocate(p,5);
return 0;
}