std::collate::collate
From cppreference.com
                    
                                        
                    
                    
                                                            
                    | Defined in header  <locale> | ||
| explicit collate( std::size_t refs = 0 ); | ||
Creates a std::collate facet and forwards the starting reference count refs to the base class constructor, locale::facet::facet()
Parameters
| refs | - | starting reference count |