Index: RewriteRope.h
===================================================================
--- RewriteRope.h	(revision 43890)
+++ RewriteRope.h	(working copy)
@@ -73,6 +73,10 @@
     return !operator==(RHS);
   }
 
+  bool operator<(const RewriteRopeIterator &RHS) const {
+	  return ( CurPiece == RHS.CurPiece ) ? CurChar < RHS.CurChar : CurPiece < RHS.CurPiece;
+  }
+
   inline RewriteRopeIterator& operator++() {   // Preincrement
     if (CurChar+1 < (*CurPiece)->size())
       ++CurChar;