On Wed, Jan 25, 2012 at 3:51 PM, Ben Mabey <b...@benmabey.com> wrote:
> On 1/25/12 1:41 PM, David Nolen wrote: > > On Wed, Jan 25, 2012 at 3:34 PM, Ben Mabey <b...@benmabey.com> wrote: > >> Hi again, >> >> Is it possible to add primitive type hints to protocols (as the return >> type)? My attempt below failed: >> >> (definterface IPrimitiveTester >> (getType [^int x]) >> (getType [^long x]) >> (getType [^float x]) >> (getType [^double x]) >> (getType [^Object x])) >> >> (deftype PrimitiveTester [] >> IPrimitiveTester >> (getType [this ^int x] :int) >> (getType [this ^long x] :long) >> (getType [this ^float x] :float) >> (getType [this ^double x] :double) >> (getType [this ^Object x] :object)) >> >> >> (defmacro primitive-type [x] >> `(.getType (PrimitiveTester.) ~x)) >> >> (defmacro pt [x] >> `(.getType (PrimitiveTester.) ~x)) >> >> (defprotocol Foo >> (bar [foo])) >> >> (deftype Dog [] >> Foo >> (bar ^double [_] 42.0)) >> >> (pt (bar (Dog.))) ; => :object >> >> (I also tried adding the hint to the protocol definition but that >> resulted in a compiler error.) >> >> In my googling the only other reference to protocols with primitive >> support was an unanswered question on this mailing list last November[1]. >> Hopefully my question gets a little more attention... >> >> (Pardon all these primitive type questions but I'm in the process of >> upgrading a 1.2 app to 1.3 and trying to convert some of our numeric heavy >> java code into clojure in the process.) >> >> Thanks, >> Ben >> >> 1. >> http://groups.google.com/group/clojure/browse_thread/thread/6015aacd6e8d0d20/ccca98bea3970240 >> > > It's not currently supported. > > Do you know if support is planned (i.e. a ticket exists)? > I don't think support is planned and given that it hasn't been done yet I imagine that it's challenging / impossible. You have definterface and prim fns in the mean time. David -- 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
