Thanks for the background. Nice also has multi-methods (late binding by argument type), and a nice discussion of the "Shortcomings of the Visitor pattern" to p

Thanks for the background. Nice also has multi-methods (late binding by argument type), and a nice discussion of the "Shortcomings of the Visitor pattern" to present it: http://nice.sourceforge.net/visitor.html http://nice.sourceforge.net/visitor.html