changed getPtr() to isNull() in util/refptr, filled in parser logic a lot more

git-svn-id: svn://anubis/fart/trunk@99 7f9b0f55-74a9-4bce-be96-3c2cd072584d

util/refptr.h

@@ -16,7 +16,7 @@ class refptr
         ~refptr<T>();
         T & operator*() const;
         T * operator->() const;
-        T * getPtr() const { return m_ptr; }
+        bool isNull() const { return m_ptr == NULL; }
 
     private:
         void cloneFrom(const refptr<T> & orig);