1 files changed, 12 insertions, 1 deletions
diff --git a/zen/stl_tools.h b/zen/stl_tools.h
index 07fc31d7..b394b128 100644
--- a/zen/stl_tools.h
+++ b/zen/stl_tools.h
@@ -18,7 +18,6 @@
 #endif
 
 
-
 //enhancements for <algorithm>
 namespace zen
 {
@@ -47,6 +46,10 @@ template <class BidirectionalIterator1, class BidirectionalIterator2>
 BidirectionalIterator1 search_last(BidirectionalIterator1 first1, BidirectionalIterator1 last1,
                                    BidirectionalIterator2 first2, BidirectionalIterator2 last2);
 
+template <class InputIterator1, class InputIterator2>
+bool equal(InputIterator1 first1, InputIterator1 last1,
+           InputIterator2 first2, InputIterator2 last2);
+
 //hash container: proper name + mitigate MSVC performance bug
 template <class T> class hash_set;
 template <class K, class V> class hash_map;
@@ -166,6 +169,14 @@ BidirectionalIterator1 search_last(const BidirectionalIterator1 first1, Bidirect
 }
 
 
+template <class InputIterator1, class InputIterator2> inline
+bool equal(InputIterator1 first1, InputIterator1 last1,
+           InputIterator2 first2, InputIterator2 last2)
+{
+    return last1 - first1 == last2 - first2 && std::equal(first1, last1, first2);
+}
+
+
 #if defined _MSC_VER && _MSC_VER <= 1600 //VS2010 performance bug in std::unordered_set<>: http://drdobbs.com/blogs/cpp/232200410 -> should be fixed in VS11
 template <class T>          class hash_set : public std::set<T> {};
 template <class K, class V> class hash_map : public std::map<K, V> {};