modulize return and list

lib/typed/compiler.rb

@@ -5,7 +5,7 @@ module Typed
   CompilerModules = [ "assignment" , "basic_values" , "call_site", "class_field" ,
                        "class_statement" , "collections" , "field_def" , "field_access",
                        "function_statement" , "if_statement" , "name_expression" ,
-                       "operator_expression"]
+                       "operator_expression" , "return_statement", "statement_list"]
 
   CompilerModules.each do |mod|
     require_relative "compiler/" + mod
@@ -191,6 +191,4 @@ module Typed
   end
 end
 
-require_relative "compiler/return_statement"
-require_relative "compiler/statement_list"
 require_relative "compiler/while_statement"

lib/typed/compiler/return_statement.rb

@@ -1,5 +1,5 @@
 module Typed
-  Compiler.class_eval do
+  module ReturnStatement
 
     def on_ReturnStatement statement
       reg =  process(statement.return_value)

lib/typed/compiler/statement_list.rb

@@ -1,7 +1,5 @@
 module Typed
-  
+  module StatementList
-  Compiler.class_eval do
-
     def on_statements statement
       process_all(  statement.children  )
     end

lib/typed/tree/return_statement.rb

@@ -1,5 +1,7 @@
 module Typed
-  class ReturnStatement < Statement
+  module Tree
-    attr_accessor :return_value
+    class ReturnStatement < Statement
+      attr_accessor :return_value
+    end
   end
 end

lib/typed/tree/to_code.rb

@@ -89,7 +89,7 @@ module Typed
     alias :on_false_statements :on_statements
 
     def on_return statement
-      w = ReturnStatement.new()
+      w = Tree::ReturnStatement.new()
       w.return_value = process(statement.children.first)
       w
     end