Visitor pattern in Cobra

[Charles]

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.

[Charles]

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

[Charles]

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.