You can't really fix that, because (:foo bar) means "call function :foo on bar", and in general the function :foo returns Object. (.foo bar) says "look at the Java object bar, and give me its foo member". Because there is a typehint on that, Clojure can know what return type to expect.
On Oct 19, 2:40 pm, Casper Clausen <casp...@gmail.com> wrote: > Thanks, that works nicely! > > Is it intended or just incidental that type hints are not retained > using the :-notation? There doesn't seem to be much advantage to not > including type hints when available. > > On Oct 11, 1:02 am, Stuart Halloway <stuart.hallo...@gmail.com> wrote: > > > > > > > > > > I am using a record to wrap a number of java classes, which I then > > > access various properties on. I am trying to avoid reflection so I > > > type have type hinted, however when accessing the values in the record > > > the type hints are lost. It might look something like this > > > > (defrecord Rec [^Integer i]) > > > > (defn to-string [^Rec record] (.toString (:i record))) > > > > However the to-string function gives a reflection warning, even with > > > the input the to function type hinted. Now I know that type hints > > > don't survive across function boundaries, but is there no way to get a > > > type hinted value from the record? > > > Treat the record as a typed thing instead of as a map (note the dot instead > > of the colon). > > > (defn to-string [^Rec record] (.toString (.i record))) > > > That said, and not knowing exactly what you are doing, the following looks > > better to me: > > > (defrecord Rec [^int i]) > > (defn to-string [^Rec record] (str (:i record))) > > > Stu > > > Stuart Halloway > > Clojure/corehttp://clojure.com -- 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
