std::experimental::pmr::polymorphic_allocator<T>::deallocate
From cppreference.com
                    
                                        
                    < cpp | experimental | polymorphic allocator
                    
                                                            
                    |   void deallocate(T* p, std::size_t n );  | 
(library fundamentals TS) | |
Deallocates the storage pointed to by p, which must have been allocated from a memory_resource x that compares equal to *resource() using x.allocate(n * sizeof(T), alignof(T)).
Equivalent to this->resource()->deallocate(p, n * sizeof(T), alignof(T));
Parameters
| p | - | pointer to memory to deallocate | 
| n | - | the number of objects originally allocated | 
Exceptions
Throws nothing.
See also
|    [static]  | 
   deallocates storage using the allocator  (public static member function of std::allocator_traits<Alloc>)  | 
|    deallocates memory  (public member function of std::experimental::pmr::memory_resource)  |