Swap for sized iterator

1 files changed, 7 insertions, 0 deletions

diff --git a/util/sized_iterator.hh b/util/sized_iterator.hh
index aabcc5319..cd0b187a9 100644
--- a/util/sized_iterator.hh
+++ b/util/sized_iterator.hh
@@ -62,6 +62,13 @@ class SizedProxy {
 
     const void *Data() const { return inner_.Data(); }
     void *Data() { return inner_.Data(); }
+    
+    friend void swap(SizedProxy &first, SizedProxy &second) {
+      std::swap_ranges(
+        static_cast<char*>(first.inner_.Data()), 
+        static_cast<char*>(first.inner_.Data()) + first.inner_.EntrySize(),
+        static_cast<char*>(second.inner_.Data()));
+    }
 
   private:
     friend class util::ProxyIterator<SizedProxy>;