Rich, is there a reason why metadata is explicitly disabled on function objects?
I find myself wanting to put metadata on functions frequently. It seems even more important for functions than for anything else, given that there is no way to inspect a function object at all, it's a complete black box. So I looked at the implementation to see if it would be easy to add metadata handling, and found to my surprise that function objects already have a metadata pointer but that setting it is disabled. Two situations where I think metadata on functions would be very useful: - To put on a type tag. If functions are to be first-class data objects, it should be possible to have multimethods dispatching on a function argument. My concrete use case is stream-generating functions with different interfaces that I would like to use with a common interface defined as a multimethod. - For implementing automatic derivatives, it would be useful to attach a derivative function to a mathematical function such as log or sqrt. Konrad. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~----------~----~----~----~------~----~------~--~---
