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clojureinstantiationtostringdeftype

What's a good toString method for a deftype'd object in clojure

(deftype Bag [state]
   Object
     (toString [bag]
       (str "Bag???" state)))

I want the toString to look something like 

clojure.core=> (def b (Bag. {:apples 1 :bannanas 4}))
#'clojure.core/b
clojure.core=> (str b)
"BAG: {:apples 1 :bannanas 4}"

What is a nice clojurey way of representing that information? Is 

"Bag/{:k :v}"

better? How does the community do you call your toStrings?

Solution

  • The following is for deftype.

    user=> (deftype Bag [state] 
         Object 
         (toString [_] 
           (str "BAG: " (pr-str state))))
user.Bag
user=> (def b (Bag. {:apples 1 :bannanas 4}))
#'user/b
user=> (str b)
"BAG: {:bannanas 4, :apples 1}"