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Inheritance is a way to reuse code of existing objects, or to establish a subtype from an existing object, or both, depending upon programming language support.
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Parallel hierarchies - partly same, partly different
Solution I - Tease Apart Inheritance
Fowler's Tease Apart Inheritance doesn't seem to do the job here, because there is some discrepancy between the two parallels. …
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Parallel hierarchies - partly same, partly different
In an article titled Design Patterns for Dealing with Dual Inheritance Hierarchies in C++, Uncle Bob presents a solution called Stairway to Heaven. … It's stated intent:
This pattern describes the network of inheritance relationships that is needed when a given hierarchy must be adapted, in its entirety, to another class. …