Thank you! On Nov 30, 2012, at 11:35 PM, dmiller <dmiller2...@gmail.com> wrote:
> Patched in master branch. > > Clojure 1.5.0-master-SNAPSHOT > user=> > user=> (defn bar [^Double d] d) > #'user/bar > user=> (defn baz [^System.Double d] d) > #'user/baz > user=> (bar 1.2) > 1.2 > user=> (baz 1.2) > 1.2 > user=> (defprotocol FP (foo [_])) > FP > user=> (extend-protocol FP System.Double (foo [d] d)) > nil > user=> (foo 1.2) > 1.2 > > You can now type hint with double, Double and System.Double. > > One should keep in mind that this is the CLR, not C# (or the JVM). Thus, > int, Int32, System.Int32 and float, Single, System.Single. > > Note that a type hint such as ^System.Int32 x is actually using the symbol > System.Int32 as the value for :tag -- that is how the LispReader works. > However, if you were to put :tag metadata on programmatically and actually > use the type System.Int32 -- well, that should work also. > > > -David > >> >> On Thursday, November 29, 2012 11:02:19 AM UTC-6, ffailla wrote: >>> >>> I have discovered some odd behavior when type-hinting fns with >>> ^System.Double: >>> >>> user=> (defn bar [^System.Double d] d) >>> #'user/bar >>> user=> (bar 1.2) >>> 2.35293190771409E-316 >>> user=> (bar 1) >>> 2.35069794048985E-316 >>> >>> The same behavior occurs when extending double via extend-protocol or >>> extend-type: >>> >>> user=> (defprotocol FooProto (foo [_])) >>> user=> (extend-protocol FooProto System.Double (foo [d] d)) >>> nil >>> user=> (foo 1.2) >>> 2.25126584588049E-316 >>> >>> Any ideas? Thanks. >>> >>> -Frank Failla > -- > 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
