IDL compiler: anonymous indexed property getters

Source/bindings/scripts/unstable/v8_interface.py

 # Copyright (C) 2013 Google Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 # copyright notice, this list of conditions and the following disclaimer
@@ skipping 189 matching lines @@
     template_contents.update({
         'attributes': attributes,
         'has_accessors': any(attribute['is_expose_js_accessors'] for attribute in attributes),
         'has_constructor_attributes': any(attribute['constructor_type'] for attribute in attributes),
         'has_per_context_enabled_attributes': any(attribute['per_context_enabled_function'] for attribute in attributes),
         'has_replaceable_attributes': any(attribute['is_replaceable'] for attribute in attributes),
     })
 
     # Methods
     methods = [v8_methods.generate_method(interface, method)
-               for method in interface.operations]
+               for method in interface.operations
+               if method.name]  # Skip anonymous special operations (methods)
     generate_overloads(methods)
     for method in methods:
         method['do_generate_method_configuration'] = (
             method['do_not_check_signature'] and
             not method['per_context_enabled_function'] and
             # For overloaded methods, only generate one accessor
             ('overload_index' not in method or method['overload_index'] == 1))
 
     template_contents.update({
         'has_origin_safe_method_setter': any(
             method['is_check_security_for_frame'] and not method['is_read_only']
             for method in methods),
         'has_method_configuration': any(method['do_generate_method_configuration'] for method in methods),
         'has_per_context_enabled_methods': any(method['per_context_enabled_function'] for method in methods),
         'methods': methods,
     })
 
+    template_contents.update({
+        'anonymous_indexed_property_getter': anonymous_indexed_property_getter(interface),
+    })
+
     return template_contents
 
 
 # [DeprecateAs], [Reflect], [RuntimeEnabled]
 def generate_constant(constant):
     # (Blink-only) string literals are unquoted in tokenizer, must be re-quoted
     # in C++.
     if constant.idl_type == 'DOMString':
         value = '"%s"' % constant.value
     else:
@@ skipping 224 matching lines @@
 
 
 def interface_length(interface, constructors):
     # Docs: http://heycam.github.io/webidl/#es-interface-call
     if 'EventConstructor' in interface.extended_attributes:
         return 1
     if not constructors:
         return 0
     return min(constructor['number_of_required_arguments']
                for constructor in constructors)
+
+
+################################################################################
+# Special operations (methods)
+# http://heycam.github.io/webidl/#idl-special-operations
+################################################################################
+
+def anonymous_indexed_property_getter(interface):
+    try:
+        getter = next(
+            method
+            for method in interface.operations
+            if ('getter' in method.specials and
+                len(method.arguments) == 1 and
+                method.arguments[0].idl_type == 'unsigned long' and
+                not method.name))
+    except StopIteration:
+        return None
+
+    idl_type = getter.idl_type
+    extended_attributes = getter.extended_attributes
+    return {
+        'cpp_type': v8_types.cpp_type(idl_type),
+        'is_null_expression': getter_is_null_expression(idl_type),
+        'name': extended_attributes['ImplementedAs'],
+        'v8_set_return_value': v8_types.v8_set_return_value(idl_type, 'element', extended_attributes=extended_attributes, script_wrappable='collection'),
+    }
+
+
+def getter_is_null_expression(idl_type):
+    if idl_type == 'DOMString':
+        return 'element.isNull()'
+    return None