Dear Clojure users and team!
I have defined a macros to get an instance of arbitrary Java class and
tried to test it:
ru@ru-iMacMint:~$ lein repl
nREPL server started on port 46225 on host 127.0.0.1 -
nrepl://127.0.0.1:46225
WARNING: cat already refers to: #'clojure.core/cat in namespace:
net.cgrand.regex, being replaced by: #'net.cgrand.regex/cat
REPL-y 0.3.7, nREPL
Clojure 1.8.0
Java HotSpot(TM) 64-Bit Server VM 11.0.2+9-LTS
Docs: (doc function-name-here)
(find-doc "part-of-name-here")
Source: (source function-name-here)
Javadoc: (javadoc java-object-or-class-here)
Exit: Control+D or (exit) or (quit)
Results: Stored in vars *1, *2, *3, an exception in *e
user=> (defmacro instance [x & args] `(new ~x ~@args))
#'user/instance
user=> (instance javax.swing.JLabel "Ru")
#object[javax.swing.JLabel 0x53754b7
"javax.swing.JLabel[,0,0,0x0,invalid,alignmentX=0.0,alignmentY=0.0,border=,flags=8388608,maximumSize=,minimumSize=,preferredSize=,defaultIcon=,disabledIcon=,horizontalAlignment=LEADING,horizontalTextPosition=TRAILING,iconTextGap=4,labelFor=,text=Ru,verticalAlignment=CENTER,verticalTextPosition=CENTER]"]
user=> (defn test [x] (let [i (instance x)] i))
WARNING: test already refers to: #'clojure.core/test in namespace: user,
being replaced by: #'user/test
CompilerException java.lang.IllegalArgumentException: Unable to resolve
classname: x, compiling:(null:1:24)
user=> (defn itest [x] (let [i (instance x)] i))
CompilerException java.lang.IllegalArgumentException: Unable to resolve
classname: x, compiling:(null:1:25)
user=>
Why I can't use my macro in a function definition?
Any help would be greatly appreciated.
Sincerely,
Ru.
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