std::variant<Types...>::~variant
From cppreference.com
                    
                                        
                    
                    
                                                            
                    |   ~variant();  | 
(since C++17) | |
If valueless_by_exception is true, does nothing. Otherwise, destroys the currently contained value.
This destructor is trivial if std::is_trivially_destructible_v<T_i> is true for all T_i in Types...