Add support for bitset inheritance

    * tests/idl4/illegal_idl/bitset_inherit_struct.idl:
      Added.

    * ridlbe/c++11/templates/cli/hdr/bitset.erb:
    * ridlbe/c++11/visitors/bitset.rb:

ridlbe/c++11/templates/cli/hdr/bitset.erb

@@ -2,7 +2,7 @@
 // generated from <%= ridl_template_path %>
 /// @copydoc <%= doc_scoped_name %>
 /// @todo THIS MAPPING IS NOT COMPLETE
-class <%= cxxname %>
+class <%= cxxname %><% unless base.nil? %> : public <%= base.cxxname %><% end %>
 {
 public:
   <%= cxxname %> () = default;

ridlbe/c++11/visitors/bitset.rb

@@ -17,6 +17,11 @@ def bitfields
         }
       end
 
+      # Return the base of this bitset, nil in case of no base bitset
+      def base
+        node.base
+      end
+
       # template mapping
 
       map_template :bitset, :bitset

tests/idl4/illegal_idl/bitset_inherit_struct.idl

@@ -0,0 +1,16 @@
+/**
+ * @file bitfield_65.idl
+ * @author Johnny Willemsen
+ *
+ * ridlc shall reject use of a bitset which inherits from a struct
+ *
+ * @copyright Copyright (c) Remedy IT Expertise BV
+ */
+
+struct Base {
+  short Foo;
+};
+
+bitset MyBitset : Base {
+  bitfield<6> x;
+};