Implementing virtual bases with fixed offsets in object oriented applications
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United States of America Patent
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May 27, 2008
Grant Date -
Sep 23, 2004
app pub date -
Mar 24, 2004
filing date -
Oct 22, 1999
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A method for implementing virtual bases with fixed offsets in a class hierarchy graph, having nodes representing object classes and edges representing immediate inheritance therebetween, corresponding to an object oriented program includes determining whether a set N including all nodes is empty. A node x is removed from N, when N is not empty. It is determined whether a set Y is empty, Y including nodes that directly and virtually inherit from x. When Y is empty, return to determining whether N is empty, otherwise a node y is removed from Y. It is determined whether y is duplicated. When y is duplicated, return to determining whether Y is empty, otherwise an edge e, representing that y virtually inherits from x, is replaced with an edge e', representing that x has a fixed offset with respect to y. Upon replacing e, return to determining whether N is empty.
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