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Actually this class would work fine with any CLR language including C# and VB. It's likely that Visitor will get into the Cobra standard library, enabling you to quickly pound out a visitor pattern in any Cobra program. Feedback welcome.

Ack, I uploaded the wrong file. This new one is much the same, but the docs are slightly improved.

Btw this made it into the Cobra standard library, so the "Visitor" class is now available by default. It's a rather small, but useful class. Inside CobraLang.cobra, you'll find a doc string explaining how it works.