X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=folly%2FHash.h;h=109b24e40e5478b1a2954c6b108376a02d76c9b5;hb=46e3ed2921bd4e5de81fbc36fcb6a82d30d1499f;hp=a57bbbe05a65a63d2dd9822ce2de47ca12751d27;hpb=22afce906d7e98d95f8c45c3301072d9fd891d41;p=folly.git

diff --git a/folly/Hash.h b/folly/Hash.h
index a57bbbe0..109b24e4 100644
--- a/folly/Hash.h
+++ b/folly/Hash.h
@@ -23,8 +23,8 @@
 #include <utility>
 #include <tuple>
 
-#include "folly/SpookyHashV1.h"
-#include "folly/SpookyHashV2.h"
+#include <folly/SpookyHashV1.h>
+#include <folly/SpookyHashV2.h>
 
 /*
  * Various hashing functions.
@@ -59,6 +59,19 @@ inline size_t hash_combine_generic() {
   return 0;
 }
 
+template <
+    class Iter,
+    class Hash = std::hash<typename std::iterator_traits<Iter>::value_type>>
+uint64_t hash_range(Iter begin,
+                    Iter end,
+                    uint64_t hash = 0,
+                    Hash hasher = Hash()) {
+  for (; begin != end; ++begin) {
+    hash = hash_128_to_64(hash, hasher(*begin));
+  }
+  return hash;
+}
+
 template <class Hasher, typename T, typename... Ts>
 size_t hash_combine_generic(const T& t, const Ts&... ts) {
   size_t seed = Hasher::hash(t);