Warnings fixes for VS.

include/osgIntrospection/Attributes

@@ -288,6 +288,8 @@ namespace osgIntrospection
 
     private:
         const Type& _type;
+
+        PropertyTypeAttribute& operator = (const PropertyTypeAttribute&) { return *this; }
     };
 
     /// Attribute for overriding the type of an index (of an indexed 
@@ -313,6 +315,9 @@ namespace osgIntrospection
         }
 
     private:
+    
+        IndexTypeAttribute& operator = (const IndexTypeAttribute&) { return *this; }
+    
         int _wi;
         const Type& _type;
     };

include/osgIntrospection/ConstructorInfo

@@ -92,6 +92,9 @@ namespace osgIntrospection
         virtual void getInheritedProviders(CustomAttributeProviderList& providers) const;
         
     private:
+
+        ConstructorInfo& operator = (const ConstructorInfo&) { return *this; }
+
         const Type& _declarationType;
         ParameterInfoList _params;
         bool _explicit;

include/osgIntrospection/MethodInfo

@@ -114,6 +114,9 @@ namespace osgIntrospection
         inline Value invoke() const;
 
     private:
+
+        MethodInfo& operator = (const MethodInfo&) { return *this; }
+
         inline std::string strip_namespace(const std::string& s) const;
 
         virtual void getInheritedProviders(CustomAttributeProviderList& providers) const;

include/osgIntrospection/ParameterInfo

@@ -68,6 +68,9 @@ namespace osgIntrospection
         inline bool isInOut() const { return isIn() && isOut(); }
 
     private:
+
+        ParameterInfo& operator = (const ParameterInfo&) { return *this; }
+
         std::string _name;
         const Type& _type;
         int attribs_;

include/osgIntrospection/PropertyInfo

@@ -360,6 +360,9 @@ namespace osgIntrospection
         virtual void getInheritedProviders(CustomAttributeProviderList& providers) const;
 
     private:
+    
+        PropertyInfo& operator = (const PropertyInfo&) { return *this; }
+
         const Type& _declarationType;
         const Type& _ptype;
         std::string _name;

include/osgIntrospection/Value

@@ -177,9 +177,22 @@ namespace osgIntrospection
         struct Instance: Instance_base
         {
             Instance(T data): _data(data) {}
+            
             virtual Instance_base *clone() const { return new Instance<T>(*this); }
             virtual ~Instance() {}
             T _data;
+            
+        protected:
+        
+            Instance& operator = (const Instance& rhs)
+            {
+                if (&rhs!=this) 
+                {
+                    _data = rhs._data;
+                }
+                return *this;
+            }
+            
         };
 
         // Base class for storage of Instance objects. Actually three
@@ -233,7 +246,7 @@ namespace osgIntrospection
                 _ref_inst = new Instance<T &>(vl->_data);
                 _const_ref_inst = new Instance<const T &>(vl->_data);
             }
-
+            
             virtual Instance_box_base *clone() const
             {
                 Instance_box<T> *new_inbox = new Instance_box<T>();
@@ -261,6 +274,9 @@ namespace osgIntrospection
 
         private:
             bool nullptr_;
+
+            Instance_box& operator = (const Instance_box&) { return *this; }
+
         };
 
         // Generic instance box for pointer values. Unlike Instance_box<>,