The distinction is that you type hint function parameters to tell the compiler that this function parameter will always be of the specified type. You coerce something that may or may not be of a desired type, but is known to cleanly convert to that type.
So: (defn add-two [^long x] (+ x 2)) ;=> #'user/add-two (add-two (long 1.2)) ;=> 3 On Wed, Sep 14, 2011 at 2:03 PM, Sergey Didenko <sergey.dide...@gmail.com> wrote: > What is the intended difference between type hinting like "^long" and > type coercing like "(long arg)"? > > For example my gut feeling for this case is to use ^long but it is forbidden: > > (loop [^long x 0] > ...) > > "Can't type hint a local with a primitive initializer" > > So I use > > (loop [x (long 0)] > ...) > > But not quite sure if it's right. > > -- > 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
