clojure中类型暗示

很多开源代码中（eg：storm）都会出现这样的代码

eg:

(^voiduploadChunk [this^String location ^ByteBufferchunk]

       (let [uploaders (:uploaders nimbus)

             ^WritableByteChannelchannel (.getuploaders location)]

         (when-not channel

           (throw (RuntimeException.

"File for that location does not exist (or timed out)")))

         (.write channel chunk)

         (.put uploaders locationchannel)

         ))

 

里面的^符号除了让代码的可读性更高还有什么用处呢？

看api介绍Clojure supports the use of type hints to assist the compiler in avoiding reflection in performance-critical areas of code
原来类型暗示还可以避免反射，提高效率。