CLJ-1331: Update primitive vectors to use Murmur3 hash

Signed-off-by: Stuart Halloway <stu@cognitect.com>

Author: jafingerhut

src/clj/clojure/gvec.clj

@@ -10,6 +10,8 @@
 
 (in-ns 'clojure.core)
 
+(import '(clojure.lang Murmur3))
+
 ;(set! *warn-on-reflection* true)
 
 (deftype VecNode [edit arr])
@@ -145,6 +147,11 @@
                                 (clojure.lang.Util/hash val)) 
                  (inc i))))))
 
+  ;todo - cache
+  clojure.lang.IHashEq
+  (hasheq [this]
+    (Murmur3/hashOrdered this))
+
   clojure.lang.Counted
   (count [_] cnt)
 

test/clojure/test_clojure/vectors.clj

@@ -327,7 +327,9 @@
            (vector-of ""))))
   (testing "vector-like (vector-of :type x1 x2 x3 … xn)"
     (are [vec gvec] (and (instance? clojure.core.Vec gvec)
-                         (= (into (vector-of :int) vec) gvec))
+                         (= (into (vector-of :int) vec) gvec)
+                         (= vec gvec)
+                         (= (hash vec) (hash gvec)))
          [1] (vector-of :int 1)
          [1 2] (vector-of :int 1 2)
          [1 2 3] (vector-of :int 1 2 3)