C++ - Forward List get_allocator() Function
The C++ forward_list::get_allocator function is used to return a copy of allocator object associated with the given forward_list.
Syntax
allocator_type get_allocator() const noexcept;
Parameters
None.
Return Value
Returns an allocator associated with the given forward_list.
Time Complexity
Constant i.e, Θ(1).
Example:
In the below example, the forward_list::get_allocator function is used to return a copy of same allocator object used by the forward_list f_list.
#include <iostream> #include <forward_list> using namespace std; int main (){ forward_list<int> f_list; int *p; //allocate array with a memory to store 5 //elements using forward_list's allocator p = f_list.get_allocator().allocate(5); //construct values in-place on the array for(int i=0; i<5; i++) f_list.get_allocator().construct(&p[i], 100*(i+1)); cout<<"The allocated array contains: "; for(int i=0; i<5; i++) cout<<p[i]<<" "; //destroy and deallocate the array for(int i=0; i<5; i++) f_list.get_allocator().destroy(&p[i]); f_list.get_allocator().deallocate(p,5); return 0; }
The output of the above code will be:
The allocated array contains: 100 200 300 400 500
❮ C++ - Forward List