A language translator is provided which determines memory structure at compile time for a plurality of object classes including at least one virtual base class and at least one class derived therefrom. At compile time, space for pointers (b-pointers) is set aside in each class object that will have a base table (b-table) associated therewith. The b-pointers point, at run time, to an associated b-table containing memory offsets between the base classes of the derived class. At run time, constructors construct the class objects, starting from the most derived class object and proceeding through to the base class object. However, instead of generating the virtual tables and associated pointers, as well as the adjusting functions, at compile time, the language translator generates the code for these operation to be executed at run time. Then at run time, a virtual function table is generated for the base class. Since the necessary offsets are known at run time, all of the adjusting functions, the virtual function tables, and the virtual pointers may be generated. Thus, the system completes the construction of an object.