Introduce TypeRegistry class.

lib/dom/scripts/systembase.py

 #!/usr/bin/python
 # Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 """This module provides base functionality for systems to generate
 Dart APIs from the IDL database."""
 
 import os
 from generator import *
 
 def MassagePath(path):
   # The most robust way to emit path separators is to use / always.
   return path.replace('\\', '/')
 
 class System(object):
   """A System generates all the files for one implementation.
 
   This is a base class for all the specific systems.
   The life-cycle of a System is:
   - construction (__init__)
   - (InterfaceGenerator | ProcessCallback)*  # for each IDL interface
   - GenerateLibraries
   - Finish
   """
 
-  def __init__(self, templates, database, emitters, output_dir):
-    self._templates = templates
-    self._database = database
-    self._emitters = emitters
-    self._output_dir = output_dir
+  def __init__(self, options):
+    self._templates = options.templates
+    self._database = options.database
+    self._emitters = options.emitters
+    self._type_registry = options.type_registry
+    self._output_dir = options.output_dir
 
   def ProcessInterface(self, interface):
     """Processes an interface that is not a callback function."""
     pass
 
   def ProcessCallback(self, interface, info):
     """Processes an interface that is a callback function."""
     pass
 
   def GenerateLibraries(self, lib_dir):
@@ skipping 172 matching lines @@
 
     result = []
     if interface.parents:
       parent = interface.parents[0]
       if IsPureInterface(parent.type.id):
         walk(interface.parents)
       else:
         walk(interface.parents[1:])
     return result
 
+class GeneratorOptions(object):
+  def __init__(self, templates, database, emitters, type_registry, output_dir):
+    self.templates = templates
+    self.database = database
+    self.emitters = emitters
+    self.type_registry = type_registry
+    self.output_dir = output_dir
+
 
 def IsReadOnly(attribute):
   return attribute.is_read_only or 'Replaceable' in attribute.ext_attrs