所以我現在有這樣的代碼:Clojure的符號計算錯誤
(ns contact-form.core
(:gen-class))
(def foo "Hello World!")
(defn some-func [a-symbol]
(println (str a-symbol "'s value is: " (eval a-symbol))))
(defn -main [& args]
(some-func 'foo))
我在Emacs做C-c C-k
後,我得到下面的輸出:
contact-form.core> (-main)
foo's value is: Hello World!
nil
但是當我做lein uberjar
並運行結果jar文件,我得到一個錯誤:
Exception in thread "main" java.lang.RuntimeException: Unable to resolve symbol: foo in this context, compiling:(NO_SOURCE_PATH:0)
at clojure.lang.Compiler.analyze(Compiler.java:6235)
at clojure.lang.Compiler.analyze(Compiler.java:6177)
at clojure.lang.Compiler.eval(Compiler.java:6469)
at clojure.lang.Compiler.eval(Compiler.java:6431)
at clojure.core$eval.invoke(core.clj:2795)
at contact_form.core$some_func.invoke(core.clj:7)
at contact_form.core$_main.doInvoke(core.clj:10)
at clojure.lang.RestFn.invoke(RestFn.java:397)
at clojure.lang.AFn.applyToHelper(AFn.java:159)
at clojure.lang.RestFn.applyTo(RestFn.java:132)
at contact_form.core.main(Unknown Source)
Caused by: java.lang.RuntimeException: Unable to resolve symbol: foo in this context
at clojure.lang.Util.runtimeException(Util.java:156)
at clojure.lang.Compiler.resolveIn(Compiler.java:6720)
at clojure.lang.Compiler.resolve(Compiler.java:6664)
at clojure.lang.Compiler.analyzeSymbol(Compiler.java:6625)
at clojure.lang.Compiler.analyze(Compiler.java:6198)
... 10 more
所以我有兩個問題:
- 爲什麼uberjar的功能與REPL的功能不完全相同?
- 我能做些什麼來解決這個問題?
'use'確實遠不止切換的命名空間。我推薦''(binding [* ns *(the-ns'contact-form.core)](some-func'foo))'' – Chouser 2013-03-26 13:40:34
@chouser太棒了!先生,請考慮我的建設! :-) – Scott 2013-03-26 21:23:40