std::pmr::unsynchronized_pool_resource::do_is_equal
From cppreference.com
                    
                                        
                    < cpp | memory | unsynchronized pool resource
                    
                                                            
                    | virtual bool do_is_equal(const std::pmr::memory_resource& other) const; | (since C++17) | |
Compare *this with other for identity - memory allocated using a unsynchronized_pool_resource can only be deallocated using that same resource.
[edit] Return value
this == dynamic_cast<const unsynchronized_pool_resource*>(&other)
[edit] Exceptions
noexcept specification:  
noexcept
  [edit] See also
| [virtual] | compare for equality with another memory_resource(virtual private member function of std::pmr::memory_resource) | 


