diff --git a/lib/ruby.rb b/lib/ruby.rb
index 34b45b7e..12abf071 100644
--- a/lib/ruby.rb
+++ b/lib/ruby.rb
@@ -9,12 +9,12 @@ end
 
 require_relative "ruby/statement"
 require_relative "ruby/statements"
+require_relative "ruby/assignment_statement"
 require_relative "ruby/array_statement"
 require_relative "ruby/block_statement"
 require_relative "ruby/if_statement"
 require_relative "ruby/normalizer"
 require_relative "ruby/send_statement"
-require_relative "ruby/assign_statement"
 require_relative "ruby/class_statement"
 require_relative "ruby/logical_statement"
 require_relative "ruby/return_statement"
@@ -24,5 +24,6 @@ require_relative "ruby/hash_statement"
 require_relative "ruby/method_statement"
 require_relative "ruby/ruby_compiler"
 require_relative "ruby/yield_statement"
+require_relative "ruby/variables"
 
 require_relative "ruby/ruby_compiler"
diff --git a/lib/ruby/assign_statement.rb b/lib/ruby/assignment_statement.rb
similarity index 81%
rename from lib/ruby/assign_statement.rb
rename to lib/ruby/assignment_statement.rb
index b03784e5..2aa01e2b 100644
--- a/lib/ruby/assign_statement.rb
+++ b/lib/ruby/assignment_statement.rb
@@ -6,7 +6,7 @@ module Ruby
       @name , @value = name , value
     end
 
-    def normalize()
+    def to_vool()
       raise "not named left #{name.class}" unless name.is_a?(Symbol)
       case value
       when Named , Constant
@@ -23,7 +23,7 @@ module Ruby
       self.class.new(name,value)
     end
 
-    def normalize_send
+    def to_vool_send
       statements = value.normalize()
       return copy( statements ) if statements.is_a?(SendStatement)
       assign = statements.statements.pop
@@ -31,11 +31,6 @@ module Ruby
       statements
     end
 
-    def chain_assign(assign , compiler)
-      return assign unless @value.is_a?(SendStatement)
-      @value.to_mom(compiler) << assign
-    end
-
     def to_s(depth = 0)
       at_depth(depth , "#{@name} = #{@value}")
     end
@@ -44,10 +39,14 @@ module Ruby
 
   class IvarAssignment < Assignment
 
-    def normalize()
+    def to_vool()
       super()
       return IvarAssignment.new(@name , @value)
     end
+  end
+
+  class LocalAssignment < Assignment
 
   end
+
 end
diff --git a/lib/ruby/block_statement.rb b/lib/ruby/block_statement.rb
index c73e1382..373622ee 100644
--- a/lib/ruby/block_statement.rb
+++ b/lib/ruby/block_statement.rb
@@ -9,7 +9,7 @@ module Vool
       @clazz = clazz
     end
 
-    def normalize
+    def to_vool
       BlockStatement.new( @args , @body.normalize)
     end
 
diff --git a/lib/ruby/class_statement.rb b/lib/ruby/class_statement.rb
index aada50ac..b602e0a1 100644
--- a/lib/ruby/class_statement.rb
+++ b/lib/ruby/class_statement.rb
@@ -16,7 +16,7 @@ module Ruby
       end
     end
 
-    def normalize
+    def to_vool
       meths = body.statements.collect{|meth| meth.normalize}
       ClassStatement.new(@name , @super_class_name, Statements.new(meths) )
     end
diff --git a/lib/ruby/if_statement.rb b/lib/ruby/if_statement.rb
index 5ede89f1..0f2dd776 100644
--- a/lib/ruby/if_statement.rb
+++ b/lib/ruby/if_statement.rb
@@ -12,7 +12,7 @@ module Ruby
       @if_false = if_false
     end
 
-    def normalize
+    def to_vool
       cond , rest = *normalize_name(@condition)
       fals = @if_false ? @if_false.normalize : nil
       me = IfStatement.new(cond , @if_true.normalize, fals)
diff --git a/lib/ruby/method_statement.rb b/lib/ruby/method_statement.rb
index 234b9d0b..1c6e2ed1 100644
--- a/lib/ruby/method_statement.rb
+++ b/lib/ruby/method_statement.rb
@@ -9,7 +9,7 @@ module Ruby
     end
 
 
-    def normalize
+    def to_vool
       MethodStatement.new( @name , @args , @body.normalize)
     end
 
diff --git a/lib/ruby/normalizer.rb b/lib/ruby/normalizer.rb
index 5476d70f..bf148c0f 100644
--- a/lib/ruby/normalizer.rb
+++ b/lib/ruby/normalizer.rb
@@ -8,7 +8,7 @@ module Ruby
     # but if(tmp_123) is with tmp_123 = @var % 5 hoisted above the if
     #
     # also constants count, though they may not be so useful in ifs, but returns
-    def normalize_name( condition )
+    def to_vool_name( condition )
       if( condition.is_a?(ScopeStatement) and condition.single?)
         condition = condition.first
       end
diff --git a/lib/ruby/return_statement.rb b/lib/ruby/return_statement.rb
index 9cf7de8d..138246f2 100644
--- a/lib/ruby/return_statement.rb
+++ b/lib/ruby/return_statement.rb
@@ -8,7 +8,7 @@ module Ruby
       @return_value = value
     end
 
-    def normalize
+    def to_vool
       val , rest = *normalize_name(@return_value)
       me = ReturnStatement.new(val)
       return me unless rest
diff --git a/lib/ruby/send_statement.rb b/lib/ruby/send_statement.rb
index b97ae46e..3b851e1c 100644
--- a/lib/ruby/send_statement.rb
+++ b/lib/ruby/send_statement.rb
@@ -8,7 +8,7 @@ module Ruby
       @arguments ||= []
     end
 
-    def normalize
+    def to_vool
       statements = Statements.new([])
       arguments = []
       @arguments.each_with_index do |arg , index |
@@ -22,7 +22,7 @@ module Ruby
       end
     end
 
-    def normalize_arg(arg , arguments , statements)
+    def to_vool_arg(arg , arguments , statements)
       if arg.respond_to?(:slot_definition) and !arg.is_a?(SendStatement)
         arguments << arg
         return
diff --git a/lib/ruby/statement.rb b/lib/ruby/statement.rb
index de21ccbc..330e8738 100644
--- a/lib/ruby/statement.rb
+++ b/lib/ruby/statement.rb
@@ -16,7 +16,7 @@ module Ruby
 
   class Expression
 
-    def normalize
+    def to_vool
       raise "should not be normalized #{self}"
     end
 
diff --git a/lib/ruby/variables.rb b/lib/ruby/variables.rb
new file mode 100644
index 00000000..c2145985
--- /dev/null
+++ b/lib/ruby/variables.rb
@@ -0,0 +1,36 @@
+module Ruby
+  module Named
+    attr_reader :name
+    def initialize name
+      @name = name
+    end
+    def each(&block)
+    end
+  end
+
+  class LocalVariable < Expression
+    include Named
+    def to_s
+      name.to_s
+    end
+  end
+
+  class InstanceVariable < Expression
+    include Named
+    # used to collect type information
+    def add_ivar( array )
+      array << @name
+    end
+    def to_s
+      "@#{name}"
+    end
+  end
+
+  class ClassVariable < Expression
+    include Named
+  end
+
+  class ModuleName < Expression
+    include Named
+  end
+end
diff --git a/lib/ruby/while_statement.rb b/lib/ruby/while_statement.rb
index 31f75b36..842fe3fd 100644
--- a/lib/ruby/while_statement.rb
+++ b/lib/ruby/while_statement.rb
@@ -11,7 +11,7 @@ module Ruby
       @body = body
     end
 
-    def normalize
+    def to_vool
       cond , rest = *normalize_name(@condition)
       WhileStatement.new(cond , @body.normalize , rest)
     end
diff --git a/lib/ruby/yield_statement.rb b/lib/ruby/yield_statement.rb
index d8b44e6f..27817860 100644
--- a/lib/ruby/yield_statement.rb
+++ b/lib/ruby/yield_statement.rb
@@ -8,7 +8,7 @@ module Ruby
       @arguments ||= []
     end
 
-    def normalize
+    def to_vool
       statements = Statements.new([])
       arguments = []
       @arguments.each_with_index do |arg , index |
@@ -22,7 +22,7 @@ module Ruby
       end
     end
 
-    def normalize_arg(arg , arguments , statements)
+    def to_vool_arg(arg , arguments , statements)
       if arg.respond_to?(:slot_definition) and !arg.is_a?(YieldStatement)
         arguments << arg
         return
diff --git a/test/ruby/test_yield_statement.rb b/test/ruby/test_yield_statement.rb
index 3b45d8e1..abd4fff1 100644
--- a/test/ruby/test_yield_statement.rb
+++ b/test/ruby/test_yield_statement.rb
@@ -20,9 +20,5 @@ module Ruby
     def test_method_yield?
       assert_equal true , @lst.has_yield?
     end
-    def test_method_args
-      Parfait.boot!
-      assert_equal 2 , @lst.make_arg_type.get_length
-    end
   end
 end