Method for implementing virtual function tables in a compiler fo

Details Method for implementing virtual function tables in a compiler fo Method for implementing virtual function tables in a compiler fo

Filed on

1992-05-06

Date issued

1994-07-05

Examiner

Shaw, Gareth D.

Patent Class

Boots, shoes, and leggings

Other Related Categories

364DIG1, 3642804, G06F 945

Type

Patent

Status

active

Patent number

053275624

Description

ABSTRACT:
A method for a computer compiler for an object-oriented programming language for implementing virtual functions is provided. In preferred embodiments of the present invention, the virtual function table for a class contains a tile table and a plurality of sub-tables. The tile table contains pointers to the sub-tables, and the sub-tables contain pointers to the virtual function members of the class. Each child class shares a sub-table of the parent class when the child class does not override a function in that sub-table. If the child class overrides a function, then the child is allocated its own sub-table. Each virtual function member for a class is identified by a tile table offset and a sub-table offset.

REFERENCES:
patent: 5093914 (1993-03-01), Coplien et al.
Ellis, Margaret A. and Bjarne Stroustrup, The Annotated C++ Reference Manual, Addison-Wesley Publishing Company, 1990, pp. 217-237.
Saran, Cliff and Paul Kemp, "The OWL, the Framework, His Vision and Her Workshop," EXE, vol. 6, No. 6, Nov., 1991, p. 14.
Goldberg, Adele and David Robson, Smalltalk-80; The Language and its Implementation, Addison-Wesley Publishing Company, 1983, excerpts.
Budd, Timothy, An Introduction to Object-Oriented Programming, Addison-Wesley Publishing Company, 1991, pp. 281-301.

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