Clojure

proxy-super calls generally use reflection

Details

  • Type: Defect Defect
  • Status: Open Open
  • Priority: Minor Minor
  • Resolution: Unresolved
  • Affects Version/s: Release 1.6
  • Fix Version/s: None
  • Component/s: None
  • Labels:

Description

For example:

user=> (proxy [java.util.BitSet] []
  (flip [bitIndex]
    (proxy-super flip bitIndex)))
Reflection warning, NO_SOURCE_PATH:73:5 - call to method flip can't be resolved (target class is unknown).

I believe this issue might be fixed by simply adding type-hint metadata to the 'this symbol emitted by the proxy macro. I have not tried this change, but this macro seems to indicate it should work:

(defmacro proxy-super-cls [cls meth & args]
  (let [thissym (with-meta (gensym) {:tag cls})]
    `(let [~thissym ~'this]
      (proxy-call-with-super (fn [] (. ~thissym ~meth ~@args)) ~thissym ~(name meth))
    )))
;;;;;;;;;;;;;;;;;;;;;;
user=> (proxy [java.util.BitSet] []
  (flip [bitIndex]
    (proxy-super-cls java.util.BitSet flip bitIndex)))
#<BitSet$ff19274a {}>

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Dates

  • Created:
    Updated: