As David mentioned, *unchecked-math* is documented as a compile-time flag. The coercion functions are a bit muddled by the changes to primitive math in 1.3. In Clojure 1.2, you could get primitive int inside loop/recur by calling `int` in the loop initialization. You can still do that in 1.3, but coercions inside loops are used less often because functions can now have primitive arguments. Primitive function args are restricted to longs and doubles, so the default numeric types in 1.3 are java.lang.Long/java.lang.Double, and that's what the Reader returns for numeric literals:
user=> (class (read-string "0xffffffff")) java.lang.Long Clojure won't ever give you a primitive 32-bit int outside of loop/recur, which is a frequent subject of confusion. Even if you coerce to `int`, the result is boxed as a java.lang.Long: user=> (class (int 32)) java.lang.Long If you need an unchecked 32-bit trucate operation, you can use the java.lang.Number.intValue() method: user=> (map #(.intValue %) [33 77 0xffffffff]) (33 77 -1) But even then, you're still getting java.lang.Longs back: user=> (class (.intValue 0xffffffff)) java.lang.Long Hope this helps, -S -- 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
