The invention provides a representation method for an object that is fast and
has an extremely little effect on the execution efficiency of a processing system.
A computer system that implements an object-oriented programming language according
to the invention as runtime representation for an object in programming language
that is implemented, comprises an object, a type information block, and a class
structure, wherein the object has a header including a pointer to the type information
block, wherein the type information block has a class pointer pointing to the class
structure, wherein a plurality of class pointers are provided depending on the
number of states of the object and individual class pointers are associated with
individual states of the object, and wherein the pointer included in the header
of the object uses lower bits to point to the class pointers individually in order
to represent the states of the object.
