Method for implementing virtual function tables in a compiler for an object-oriented programming language
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United States of America Patent
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Jul 5, 1994
Grant Date -
N/A
app pub date -
May 6, 1992
filing date -
May 6, 1992
priority date (Note) -
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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.
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