v0.2.55..v0.2.56 changeset IdSwapOp.h

diff --git a/hoot-core/src/main/cpp/hoot/core/ops/IdSwapOp.h b/hoot-core/src/main/cpp/hoot/core/ops/IdSwapOp.h
index 8973586..e8c2d06 100644
--- a/hoot-core/src/main/cpp/hoot/core/ops/IdSwapOp.h
+++ b/hoot-core/src/main/cpp/hoot/core/ops/IdSwapOp.h
@@ -51,7 +51,7 @@ public:
   /**
    * @brief IdSwapOp - Default constructor
    */
-  IdSwapOp() { }
+  IdSwapOp() = default;
 
   /**
    * @brief IdSwapOp - Constructor taking a swap object with the IDs to swap
@@ -63,6 +63,8 @@ public:
    */
   IdSwapOp(ElementId e1, ElementId e2) : _idSwap(new IdSwap(e1,e2)) { }
 
+  virtual ~IdSwapOp() = default;
+
   /**
    * @brief apply - Apply the IdSwap op
    * @param pMap - Target map