C++ Forward_list Library - get_allocator() Function

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Description

The C++ function std::forward_list::get_allocator() returns an allocator associated with forward_list.

Declaration

Following is the declaration for std::forward_list::get_allocator() function form std::forward_list header.

C++11

allocator_type get_allocator() const noexcept;

Parameters

None

Return value

Returns an allocator associated with forward_list.

Exceptions

This member function never throws exception.

Time complexity

Constant i.e. O(1)

Example

The following example shows the usage of std::forward_list::get_allocator() function.

#include <iostream>
#include <forward_list>

using namespace std;

int main(void) {

   forward_list<int> fl = {1, 2, 3, 4, 5};
   int *p = NULL;

   p = fl.get_allocator().allocate(5);

   for (int i = 0; i < 5; ++i)
      p[i] = i + 1;

   cout << "List contains following elements" << endl;

   for (int i = 0; i < 5; ++i)
      cout << p[i] << endl;

   return 0;
}

Let us compile and run the above program, this will produce the following result −

List contains following elements
1
2
3
4
5