The redefinition of functions somehow is spooking the compiler. But if you're at the REPL you should be seeing these warnings (are you doing AOT compile?) WARNING: double already refers to: #'clojure.core/double in namespace: user, being replaced by: #'user/double WARNING: * already refers to: #'clojure.core/* in namespace: user, being replaced by: #'user/*
Clojure 1.2 will compile regardless; later versions will produce the NPE. There's nothing wrong with your parens or your use of local functions. I just changed "double" to "doubl" and "*" to "x" and it all works fine. The stack trace isn't pretty but the warnings would've helped, so it's good to try things at the REPL. On Wednesday, May 16, 2012 3:25:20 PM UTC-7, Sargash wrote: > > Hi! > > I have a problem. With that code: > > ; ======================================= > ; ex 1.17 multiply > (defn ex1_17 [] > (defn double [x] (+ x x)) > (defn halve [x] (/ x 2)) > > (defn * [a b] > (cond > (= b 0) 0 > (even? b) (* (double a) (halve b)) > :else (+ a (* a (- b 1))))) > > (println (* 5 5)) > ) > (ex1_17 ) > > I gave that exception: > > Exception in thread "main" java.lang.NullPointerException, compiling: > (D:\workprivate\ll\1\src\first.clj:3) > at clojure.lang.Compiler.analyzeSeq(Compiler.java:6462) > at clojure.lang.Compiler.analyze(Compiler.java:6262) > at clojure.lang.Compiler.analyzeSeq(Compiler.java:6443) > at clojure.lang.Compiler.analyze(Compiler.java:6262) > at clojure.lang.Compiler.access$100(Compiler.java:37) > at clojure.lang.Compiler$DefExpr$Parser.parse(Compiler.java:518) > at clojure.lang.Compiler.analyzeSeq(Compiler.java:6455) > at clojure.lang.Compiler.analyze(Compiler.java:6262) > at clojure.lang.Compiler.analyze(Compiler.java:6223) > at clojure.lang.Compiler.eval(Compiler.java:6515) > at clojure.lang.Compiler.load(Compiler.java:6952) > at clojure.lang.Compiler.loadFile(Compiler.java:6912) > at clojure.main$load_script.invoke(main.clj:283) > at clojure.main$script_opt.invoke(main.clj:343) > at clojure.main$main.doInvoke(main.clj:427) > at clojure.lang.RestFn.invoke(RestFn.java:408) > at clojure.lang.Var.invoke(Var.java:415) > at clojure.lang.AFn.applyToHelper(AFn.java:161) > at clojure.lang.Var.applyTo(Var.java:532) > at clojure.main.main(main.java:37) > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > at > sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java: > 39) > at > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java: > > > 25) > at java.lang.reflect.Method.invoke(Method.java:597) > at > com.intellij.rt.execution.application.AppMain.main(AppMain.java: > 120) > Caused by: java.lang.NullPointerException > at clojure.lang.Compiler$ObjExpr.emitVar(Compiler.java:4774) > at clojure.lang.Compiler$DefExpr.emit(Compiler.java:418) > at clojure.lang.Compiler$BodyExpr.emit(Compiler.java:5659) > at clojure.lang.Compiler$FnMethod.doEmit(Compiler.java:5215) > at clojure.lang.Compiler$FnMethod.emit(Compiler.java:5069) > at clojure.lang.Compiler$FnExpr.emitMethods(Compiler.java:3600) > at clojure.lang.Compiler$ObjExpr.compile(Compiler.java:4233) > at clojure.lang.Compiler$FnExpr.parse(Compiler.java:3732) > at clojure.lang.Compiler.analyzeSeq(Compiler.java:6453) > ... 24 more > > Could you tell me where I wrong? -- 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
