work in progress on iterators

1 files changed, 12 insertions, 2 deletions

diff --git a/include/interface.h b/include/interface.h
index b3031e9..bdff75d 100644
--- a/include/interface.h
+++ b/include/interface.h
@@ -43,7 +43,7 @@ private:
      *  Construct a new instance of the object
      *  @return Base
      */
-    virtual Base* construct() override
+    virtual Base* construct() const override
     {
         // this does not occur for interfaces
         return nullptr;
@@ -54,11 +54,21 @@ private:
      *  @param  orig
      *  @return Base
      */
-    virtual Base* clone(Base *orig) override
+    virtual Base* clone(Base *orig) const override
     {
         // this does not occur for interfaces
         return nullptr;
     }
+    
+    /**
+     *  Is this a traversable interface?
+     *  @return bool
+     */
+    virtual bool traversable() const override
+    {
+        // interfaces are never traversed
+        return false;
+    }
 
     /**
      *  Namespaces have access to the private base class