Gustavo Carneiro wrote:
A better question would be, is multiple inheritance good or bad for programs? :-)
I would say there are good ways of using it, and bad ways of using it. In my experience, the good ways occur when the classes being mixed together are completely independent -- there is no overlap in method or instance variable names, and each class brings its own independent bundle of functionality to the party. If the classes being mixed clash or overlap in functionality somehow, the inheriting class needs to override all of the clashing methods and properties and resolve matters by delegating to one or another of the inherited classes (using explicit inherited method calls, not super!). If it's not feasible to do that for some reason, then you're better off forgetting about multiple inheritance and finding some other solution to the problem. -- Greg