move from known attributes to volotile (white to blacklist)

lib/sof/all.rb

@@ -1,6 +1,6 @@
 require_relative "util"
 require_relative "members"
-require_relative "known"
+require_relative "volotile"
 require_relative "writer"
 require_relative "array"
 require_relative "occurence"
@@ -10,11 +10,6 @@ Symbol.class_eval do
     io.write ":#{to_s}"
   end
 end
-NilClass.class_eval do
-  def to_sof(io,members)
-    io.write "nil"
-  end
-end
 TrueClass.class_eval do
   def to_sof(io , members)
     io.write "true"

lib/sof/known.rb

@@ -1,13 +0,0 @@
-module Sof
-  class Known
-    @@mapping = {
-      Virtual::MethodDefinition =>  [:name , :args , :receiver , :return_type , :blocks]
-    }
-    def self.is clazz
-      @@mapping.has_key? clazz
-    end
-    def self.attributes clazz
-      @@mapping[clazz]
-    end
-  end
-end

lib/sof/util.rb

@@ -15,11 +15,8 @@ module Sof
     end
 
     def attributes_for object
-      if( Known.is( object.class ))
-        Known.attributes(object.class)
-      else
-        object.instance_variables.collect{|i| i.to_s[1..-1].to_sym } # chop of @
-      end
+      attributes = object.instance_variables.collect{|i| i.to_s[1..-1].to_sym } # chop of @
+      attributes - Volotile.attributes(object.class)
     end
     
   end

lib/sof/volotile.rb

@@ -0,0 +1,10 @@
+module Sof
+  class Volotile
+    @@mapping = {
+      Virtual::MethodDefinition =>  []
+    }
+    def self.attributes clazz
+      @@mapping[clazz] || []
+    end
+  end
+end