On Fri 14/01/11 17:07 , Sam Aaron samaa...@gmail.com sent: > Today I evaluated John Lawrence Aspden's Clojure port of a fractal tree > program which contains optimisations targeting 1.3: > http://www.learningclojure.com/2010/09/clojure-13-first-impress > ion.html > Unfortunately, this no longer compiles with 1.3.0-alpha4 as draw-tree has > too many arguments: > "CompilerException java.lang.IllegalArgumentException: fns taking > primitives support only 4 or fewer args" > The signature of the offending function is as follows: > > (defn ^:static draw-tree [ #^Graphics g2d ^double angle ^double x ^double y > ^double length ^double branch-angle ^long depth] ...)
Note that from what I understand, ^:static doesn't do anything any more. (Despite it appearing in core.clj in a few places). In early snapshots of 1.3, primitive arguments were implemented by ^:static, which caused the function implementation class to get augmented with a static method with primitive arguments. There were a number of limitations of this approach - for instance it only supported top-level functions, not closures; and I think it lacked some of the dynamic features of normal features. The new implementation of primitive functions doesn't require the ^:static tag, but it does limit the function to a maximum of 4 args. As David Nolen suggests, deftypes/defrecords support primitive fields, so wrapping the arguments in this way is probably the easiest option. -- Dave -- 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
