On Wed, Mar 4, 2009 at 12:50 PM, Konrad Hinsen <[email protected]>wrote:
> > 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. > +1. Also, are there any plans to allow function introspection in the future? Anand --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~----------~----~----~----~------~----~------~--~---
