I think anonymous functions are more useful, since you could still pass an object instance at run time, but you can’t pass a function as an argument (much less declare it anonymously).

Anonymous function would be visit(function() { .. }); which is useful, but often alittle more that just a single function.

There was a discussion on internals about anonymous functions & closures awhile back, I believe even patches appeared for the former, but not to sure on the latter, as obviously would be bit more involved.