impl clone for iter/values/keys of storage types

near-sdk/src/store/free_list/iter.rs

@@ -89,6 +89,18 @@ where
     }
 }
 
+impl<'a, T> Clone for Iter<'a, T>
+where
+    T: BorshDeserialize + BorshSerialize + Clone,
+{
+    fn clone(&self) -> Self {
+        Self {
+            values: self.values.clone(),
+            elements_left: self.elements_left,
+        }
+    }
+}
+
 impl<'a, T> ExactSizeIterator for Iter<'a, T> where T: BorshSerialize + BorshDeserialize {}
 impl<'a, T> FusedIterator for Iter<'a, T> where T: BorshSerialize + BorshDeserialize {}
 

near-sdk/src/store/iterable_map/iter.rs

@@ -88,6 +88,20 @@ where
     }
 }
 
+impl<'a, K, V, H> Clone for Iter<'a, K, V, H>
+where
+    K: BorshSerialize + Ord + BorshDeserialize + Clone,
+    V: BorshSerialize + BorshDeserialize,
+    H: ToKey,
+{
+    fn clone(&self) -> Self {
+        Self {
+            keys: self.keys.clone(),
+            values: self.values,
+        }
+    }
+}
+
 impl<'a, K, V, H> ExactSizeIterator for Iter<'a, K, V, H>
 where
     K: BorshSerialize + Ord + BorshDeserialize + Clone,

near-sdk/src/store/iterable_set/iter.rs

@@ -66,6 +66,17 @@ where
     }
 }
 
+impl<'a, T> Clone for Iter<'a, T>
+where
+    T: BorshSerialize + Ord + BorshDeserialize,
+{
+    fn clone(&self) -> Self {
+        Self {
+            elements: self.elements.clone(),
+        }
+    }
+}
+
 impl<'a, T> ExactSizeIterator for Iter<'a, T> where T: BorshSerialize + Ord + BorshDeserialize {}
 impl<'a, T> FusedIterator for Iter<'a, T> where T: BorshSerialize + Ord + BorshDeserialize {}
 

near-sdk/src/store/tree_map/iter.rs

@@ -89,6 +89,20 @@ where
     }
 }
 
+impl<'a, K, V, H> Clone for Iter<'a, K, V, H>
+where
+    K: BorshSerialize + Ord + BorshDeserialize + Clone,
+    V: BorshSerialize + BorshDeserialize,
+    H: ToKey,
+{
+    fn clone(&self) -> Self {
+        Self {
+            keys: self.keys.clone(),
+            values: self.values,
+        }
+    }
+}
+
 impl<'a, K, V, H> ExactSizeIterator for Iter<'a, K, V, H>
 where
     K: BorshSerialize + Ord + BorshDeserialize + Clone,

near-sdk/src/store/unordered_map/iter.rs

@@ -87,6 +87,20 @@ where
     }
 }
 
+impl<'a, K, V, H> Clone for Iter<'a, K, V, H>
+where
+    K: BorshSerialize + Ord + BorshDeserialize + Clone,
+    V: BorshSerialize + BorshDeserialize,
+    H: ToKey,
+{
+    fn clone(&self) -> Self {
+        Self {
+            keys: self.keys.clone(),
+            values: self.values,
+        }
+    }
+}
+
 impl<'a, K, V, H> ExactSizeIterator for Iter<'a, K, V, H>
 where
     K: BorshSerialize + Ord + BorshDeserialize + Clone,
@@ -262,6 +276,17 @@ where
     }
 }
 
+impl<'a, K> Clone for Keys<'a, K>
+where
+    K: BorshSerialize + BorshDeserialize + Clone,
+{
+    fn clone(&self) -> Self {
+        Self {
+            inner: self.inner.clone(),
+        }
+    }
+}
+
 impl<'a, K> ExactSizeIterator for Keys<'a, K> where K: BorshSerialize + BorshDeserialize {}
 impl<'a, K> FusedIterator for Keys<'a, K> where K: BorshSerialize + BorshDeserialize {}
 
@@ -322,6 +347,19 @@ where
     }
 }
 
+impl<'a, K, V, H> Clone for Values<'a, K, V, H>
+where
+    K: BorshSerialize + Ord + BorshDeserialize + Clone,
+    V: BorshSerialize + BorshDeserialize + Clone,
+    H: ToKey,
+{
+    fn clone(&self) -> Self {
+        Self {
+            inner: self.inner.clone(),
+        }
+    }
+}
+
 impl<'a, K, V, H> ExactSizeIterator for Values<'a, K, V, H>
 where
     K: BorshSerialize + Ord + BorshDeserialize + Clone,

near-sdk/src/store/unordered_set/iter.rs

@@ -66,6 +66,17 @@ where
     }
 }
 
+impl<'a, T> Clone for Iter<'a, T>
+where
+    T: BorshSerialize + Ord + BorshDeserialize + Clone,
+{
+    fn clone(&self) -> Self {
+        Self {
+            elements: self.elements.clone(),
+        }
+    }
+}
+
 impl<'a, T> ExactSizeIterator for Iter<'a, T> where T: BorshSerialize + Ord + BorshDeserialize {}
 impl<'a, T> FusedIterator for Iter<'a, T> where T: BorshSerialize + Ord + BorshDeserialize {}
 

near-sdk/src/store/vec/iter.rs

@@ -55,6 +55,18 @@ where
     }
 }
 
+impl<'a, T> Clone for Iter<'a, T> 
+where 
+    T: BorshSerialize + BorshDeserialize 
+{
+    fn clone(&self) -> Self {
+        Self {
+            vec: self.vec,
+            range: self.range.clone(),
+        }
+    }
+}
+
 impl<'a, T> ExactSizeIterator for Iter<'a, T> where T: BorshSerialize + BorshDeserialize {}
 impl<'a, T> FusedIterator for Iter<'a, T> where T: BorshSerialize + BorshDeserialize {}