Map operator [] directly to native implementation.

lib/dom/scripts/systemnative.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 shared functionality for the systems to generate
 native binding from the IDL database."""
 
 import emitter
 import os
@@ skipping 657 matching lines @@
     # and
     #
     #   class YImpl extends ListBase<T> { copies of transitive XImpl methods; }
     #
     dart_element_type = self._DartType(element_type)
     if self._HasNativeIndexGetter():
       self._EmitNativeIndexGetter(dart_element_type)
     else:
       self._members_emitter.Emit(
           '\n'
-          '  $TYPE operator[](int index) {\n'
-          '    return item(index);\n'
-          '  }\n',
-          TYPE=dart_element_type)
+          '  $TYPE operator[](int index) native "$(INTERFACE)_item_Callback";\n',
+          TYPE=dart_element_type, INTERFACE=self._interface.id)
 
     if self._HasNativeIndexSetter():
       self._EmitNativeIndexSetter(dart_element_type)
     else:
       # The HTML library implementation of NodeList has a custom indexed setter
       # implementation that uses the parent node the NodeList is associated
       # with if one is available.
       if self._interface.id != 'NodeList':
         self._members_emitter.Emit(
             '\n'
@@ skipping 56 matching lines @@
     if 'CheckSecurityForNode' in operation.ext_attrs:
       # FIXME: exclude from interface as well.
       return
 
     html_interface_name = self._HTMLInterfaceName(self._interface.id)
     html_name = self._html_system.RenameInHtmlLibrary(
         html_interface_name, info.name, implementation_class=True)
 
     if not html_name and info.name == 'item':
       # FIXME: item should be renamed to operator[], not removed.
-      html_name = 'item'
+      html_name = '_item'

[Anton Muhin, 2012/06/05 16:38:51]

do we need it still?

[podivilov, 2012/06/05 16:45:25]

Yes, we still need to generate native implementation.

[Anton Muhin, 2012/06/05 16:49:19]

Ok, thanks.
On 2012/06/05 16:45:25, podivilov wrote:

 
     if not html_name:
       return
 
     dart_declaration = '%s%s %s(%s)' % (
         'static ' if info.IsStatic() else '',
         self._DartType(info.type_name),
         html_name,
         info.ParametersImplementationDeclaration(self._DartType))
 
@@ skipping 278 matching lines @@
   for parent in interface.parents:
     parent_name = parent.type.id
     if not database.HasInterface(parent.type.id):
       continue
     parent_interface = database.GetInterface(parent.type.id)
     if callback(parent_interface):
       return parent_interface
     parent_interface = _FindParent(parent_interface, database, callback)
     if parent_interface:
       return parent_interface