added doc string for IKVReduce

jblomo · Apr 11, 2012 · df2b352 · df2b352
1 parent 0ef92ba
commit df2b352
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/src/clj/clojure/core/protocols.clj b/src/clj/clojure/core/protocols.clj
@@ -157,4 +157,8 @@
 (emit-array-impls int long float double byte char boolean)
 
 (defprotocol IKVReduce
+  "Protocol for concrete associative types that can reduce themselves
+   via a function of key and val faster than first/next recursion over map
+   entries. Called by clojure.core/reduce-kv, and has same
+   semantics (just different arg order)."
   (kv-reduce [amap f init]))