gistfile1.txt

+    def self.doesnt_implement_attributes(atts)
+      for at, val in atts
+        val = "''" if val.class == String && val.empty?
+        self.class_eval "def #{at}() #{val}; end"
+        self.class_eval "def #{at}=(val) throw '#{at}=(val) is not implemented' end"
+      end
+    end