On Mon, May 21, 2012 at 6:08 PM, Mark Engelberg <mark.engelb...@gmail.com> wrote:
> I never said I want inheritance. I want convenient reuse of partial > implementations. Inheritance is one way to achieve it, but I'd like to > think that Clojure can find a better way. We also have macros. You can always make your own (defmytype TypeName ...) and make compile to a deftype that rolls in the protocol implementations you want to reuse. I believe the current mechanisms > are insufficient. Copy and paste is not good enough. Mergeable maps are a > good idea, but the current way of doing things steers people away from that > solution and requires too much forethought to actively plan for reuse. If I > implement a protocol inside of defrecord, all that implementation is "locked > inside" and no one can get at it or reuse it in other contexts. This flies > in the face of so many design principles of Clojure which generally eschew > unnecessary encapsulation and privacy to make it easy to get at, reuse, and > extend data and functions. > > As I proposed in an earlier email, one brainstorm I have about this is: > > (get-protocol-implementation <type> <protocol-or-interface>) gives you back > a mapping of the functions used by that type to implement that protocol. > Also, we need a way to use mappings of functions inside of > defrecord/deftype, not just extend, if that is technologically feasible. > > I am genuinely interested in further brainstorms on the topic of how to > encourage reuse of protocol implementations *without* inheritance. > > -- > 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 > Note that posts from new members are moderated - please be patient with your > first post. > 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 -- 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 Note that posts from new members are moderated - please be patient with your first post. 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
