def is_expose_js_accessors(interface, attribute):
    # Default behavior
    is_accessor = True

    if ('ExposeJSAccessors' in interface.extended_attributes and
            'DoNotExposeJSAccessors' in interface.extended_attributes):
        raise Exception('Both of ExposeJSAccessors and DoNotExposeJSAccessors are specified at a time in an interface: ' + interface.name)
    if 'ExposeJSAccessors' in interface.extended_attributes:
        is_accessor = True
    if 'DoNotExposeJSAccessors' in interface.extended_attributes:
        is_accessor = False

    # Note that ExposeJSAccessors and DoNotExposeJSAccessors are more powerful
    # than 'static', [Unforgeable] and [OverrideBuiltins].
    if ('ExposeJSAccessors' in attribute.extended_attributes and
            'DoNotExposeJSAccessors' in attribute.extended_attributes):
        raise Exception('Both of ExposeJSAccessors and DoNotExposeJSAccessors are specified at a time on an attribute: ' + attribute.name + ' in an interface: ' + interface.name)
    if 'ExposeJSAccessors' in attribute.extended_attributes:
        return True
    if 'DoNotExposeJSAccessors' in attribute.extended_attributes:
        return False

    # These attributes must not be accessors on prototype chains.
    if (is_constructor_attribute(attribute) or
            attribute.is_static or
            is_unforgeable(interface, attribute) or
            'OverrideBuiltins' in interface.extended_attributes):
        return False

    # The members of Window interface must be placed on the instance object.
    if interface.name == 'Window':
        return False

    return is_accessor

def property_attributes(interface, attribute):
    extended_attributes = attribute.extended_attributes
    property_attributes_list = []
    if "NotEnumerable" in extended_attributes or is_constructor_attribute(attribute):
        property_attributes_list.append("v8::DontEnum")
    if is_unforgeable(interface, attribute):
        property_attributes_list.append("v8::DontDelete")
    return property_attributes_list or ["v8::None"]

def property_attributes(interface, method):
    extended_attributes = method.extended_attributes
    property_attributes_list = []
    if 'NotEnumerable' in extended_attributes:
        property_attributes_list.append('v8::DontEnum')
    if is_unforgeable(interface, method):
        property_attributes_list.append('v8::ReadOnly')
        property_attributes_list.append('v8::DontDelete')
    return property_attributes_list

def property_attributes(interface, attribute):
    extended_attributes = attribute.extended_attributes
    property_attributes_list = []
    if ('NotEnumerable' in extended_attributes or
        is_constructor_attribute(attribute)):
        property_attributes_list.append('v8::DontEnum')
    if is_unforgeable(interface, attribute):
        property_attributes_list.append('v8::DontDelete')
    return property_attributes_list or ['v8::None']

def access_control_list(interface, attribute):
    extended_attributes = attribute.extended_attributes
    access_control = []
    if "DoNotCheckSecurity" in extended_attributes:
        do_not_check_security = extended_attributes["DoNotCheckSecurity"]
        if do_not_check_security == "Setter":
            access_control.append("v8::ALL_CAN_WRITE")
        else:
            access_control.append("v8::ALL_CAN_READ")
            if has_setter(attribute):
                access_control.append("v8::ALL_CAN_WRITE")
    if is_unforgeable(interface, attribute):
        access_control.append("v8::PROHIBITS_OVERWRITING")
    return access_control or ["v8::DEFAULT"]

def is_expose_js_accessors(interface, attribute):
    # Default behavior
    is_accessor = True

    if ('ExposeJSAccessors' in interface.extended_attributes and
            'DoNotExposeJSAccessors' in interface.extended_attributes):
        raise Exception('Both of ExposeJSAccessors and DoNotExposeJSAccessors are specified at a time in an interface: ' + interface.name)
    if 'ExposeJSAccessors' in interface.extended_attributes:
        is_accessor = True
    if 'DoNotExposeJSAccessors' in interface.extended_attributes:
        is_accessor = False

    # Note that ExposeJSAccessors and DoNotExposeJSAccessors are more powerful
    # than 'static', [Unforgeable] and [OverrideBuiltins].
    if ('ExposeJSAccessors' in attribute.extended_attributes and
            'DoNotExposeJSAccessors' in attribute.extended_attributes):
        raise Exception('Both of ExposeJSAccessors and DoNotExposeJSAccessors are specified at a time on an attribute: ' + attribute.name + ' in an interface: ' + interface.name)
    if 'ExposeJSAccessors' in attribute.extended_attributes:
        return True
    if 'DoNotExposeJSAccessors' in attribute.extended_attributes:
        return False

    # These attributes must not be accessors on prototype chains.
    if (is_constructor_attribute(attribute) or
            attribute.is_static or
            is_unforgeable(interface, attribute) or
            'OverrideBuiltins' in interface.extended_attributes):
        return False

    # FIXME: We should move all of the following DOM attributes to prototype
    # chains.
    if (has_custom_getter(attribute) or
            has_custom_setter(attribute) or
            interface.name == 'Window'):
        return False

    return is_accessor

def method_context(interface, method, is_visible=True):
    arguments = method.arguments
    extended_attributes = method.extended_attributes
    idl_type = method.idl_type
    is_static = method.is_static
    name = method.name

    if is_visible:
        idl_type.add_includes_for_type(extended_attributes)

    this_cpp_value = cpp_value(interface, method, len(arguments))

    is_implemented_in_private_script = 'ImplementedInPrivateScript' in extended_attributes
    if is_implemented_in_private_script:
        includes.add('bindings/core/v8/PrivateScriptRunner.h')
        includes.add('core/frame/LocalFrame.h')
        includes.add('platform/ScriptForbiddenScope.h')

    # [OnlyExposedToPrivateScript]
    is_only_exposed_to_private_script = 'OnlyExposedToPrivateScript' in extended_attributes

    is_call_with_script_arguments = has_extended_attribute_value(method, 'CallWith', 'ScriptArguments')
    if is_call_with_script_arguments:
        includes.update(['bindings/core/v8/ScriptCallStackFactory.h',
                         'core/inspector/ScriptArguments.h'])
    is_call_with_script_state = has_extended_attribute_value(method, 'CallWith', 'ScriptState')
    is_call_with_this_value = has_extended_attribute_value(method, 'CallWith', 'ThisValue')
    if is_call_with_script_state or is_call_with_this_value:
        includes.add('bindings/core/v8/ScriptState.h')
    is_check_security_for_node = 'CheckSecurity' in extended_attributes
    if is_check_security_for_node:
        includes.add('bindings/core/v8/BindingSecurity.h')
    is_custom_element_callbacks = 'CustomElementCallbacks' in extended_attributes
    if is_custom_element_callbacks:
        includes.add('core/dom/custom/CustomElementProcessingStack.h')

    is_do_not_check_security = 'DoNotCheckSecurity' in extended_attributes

    is_check_security_for_frame = (
        has_extended_attribute_value(interface, 'CheckSecurity', 'Frame') and
        not is_do_not_check_security)

    is_check_security_for_window = (
        has_extended_attribute_value(interface, 'CheckSecurity', 'Window') and
        not is_do_not_check_security)

    is_raises_exception = 'RaisesException' in extended_attributes
    is_custom_call_prologue = has_extended_attribute_value(method, 'Custom', 'CallPrologue')
    is_custom_call_epilogue = has_extended_attribute_value(method, 'Custom', 'CallEpilogue')
    is_post_message = 'PostMessage' in extended_attributes
    if is_post_message:
        includes.add('bindings/core/v8/SerializedScriptValueFactory.h')
        includes.add('core/dom/DOMArrayBuffer.h')
        includes.add('core/dom/MessagePort.h')

    if 'LenientThis' in extended_attributes:
        raise Exception('[LenientThis] is not supported for operations.')

    return {
        'activity_logging_world_list': v8_utilities.activity_logging_world_list(method),  # [ActivityLogging]
        'arguments': [argument_context(interface, method, argument, index, is_visible=is_visible)
                      for index, argument in enumerate(arguments)],
        'argument_declarations_for_private_script':
            argument_declarations_for_private_script(interface, method),
        'conditional_string': v8_utilities.conditional_string(method),
        'cpp_type': (v8_types.cpp_template_type('Nullable', idl_type.cpp_type)
                     if idl_type.is_explicit_nullable else idl_type.cpp_type),
        'cpp_value': this_cpp_value,
        'cpp_type_initializer': idl_type.cpp_type_initializer,
        'custom_registration_extended_attributes':
            CUSTOM_REGISTRATION_EXTENDED_ATTRIBUTES.intersection(
                extended_attributes.iterkeys()),
        'deprecate_as': v8_utilities.deprecate_as(method),  # [DeprecateAs]
        'exposed_test': v8_utilities.exposed(method, interface),  # [Exposed]
        # TODO(yukishiino): Retire has_custom_registration flag.  Should be
        # replaced with V8DOMConfiguration::PropertyLocationConfiguration.
        'has_custom_registration':
            is_static or
            is_unforgeable(interface, method) or
            v8_utilities.has_extended_attribute(
                method, CUSTOM_REGISTRATION_EXTENDED_ATTRIBUTES),
        'has_exception_state':
            is_raises_exception or
            is_check_security_for_frame or
            is_check_security_for_window or
            any(argument for argument in arguments
                if (argument.idl_type.name == 'SerializedScriptValue' or
                    argument_conversion_needs_exception_state(method, argument))),
        'idl_type': idl_type.base_type,
        'is_call_with_execution_context': has_extended_attribute_value(method, 'CallWith', 'ExecutionContext'),
        'is_call_with_script_arguments': is_call_with_script_arguments,
        'is_call_with_script_state': is_call_with_script_state,
        'is_call_with_this_value': is_call_with_this_value,
        'is_check_security_for_frame': is_check_security_for_frame,
        'is_check_security_for_node': is_check_security_for_node,
        'is_check_security_for_window': is_check_security_for_window,
        'is_custom': 'Custom' in extended_attributes and
            not (is_custom_call_prologue or is_custom_call_epilogue),
        'is_custom_call_prologue': is_custom_call_prologue,
        'is_custom_call_epilogue': is_custom_call_epilogue,
#.........这里部分代码省略.........

 def function_template():
     if is_static:
         return 'functionTemplate'
     if is_unforgeable(interface, method):
         return 'instanceTemplate'
     return 'prototypeTemplate'

#.........这里部分代码省略.........
    ):
        includes.add("bindings/core/v8/V8ErrorHandler.h")

    conditional_string = v8_utilities.conditional_string(attribute)
    if conditional_string:
        includes.add("wtf/build_config.h")

    cached_attribute_validation_method = extended_attributes.get("CachedAttribute")
    keep_alive_for_gc = is_keep_alive_for_gc(interface, attribute)
    if cached_attribute_validation_method or keep_alive_for_gc:
        includes.add("bindings/core/v8/V8HiddenValue.h")

    if "APIExperimentEnabled" in extended_attributes:
        includes.add("core/experiments/ExperimentalFeatures.h")
        includes.add("core/inspector/ConsoleMessage.h")

    context = {
        "access_control_list": access_control_list(interface, attribute),
        "activity_logging_world_list_for_getter": v8_utilities.activity_logging_world_list(
            attribute, "Getter"
        ),  # [ActivityLogging]
        "activity_logging_world_list_for_setter": v8_utilities.activity_logging_world_list(
            attribute, "Setter"
        ),  # [ActivityLogging]
        "activity_logging_world_check": v8_utilities.activity_logging_world_check(attribute),  # [ActivityLogging]
        "api_experiment_enabled": v8_utilities.api_experiment_enabled_function(attribute),  # [APIExperimentEnabled]
        "api_experiment_enabled_per_interface": v8_utilities.api_experiment_enabled_function(
            interface
        ),  # [APIExperimentEnabled]
        "api_experiment_name": extended_attributes.get("APIExperimentEnabled"),  # [APIExperimentEnabled]
        "argument_cpp_type": idl_type.cpp_type_args(used_as_rvalue_type=True),
        "cached_attribute_validation_method": cached_attribute_validation_method,
        "conditional_string": conditional_string,
        "constructor_type": constructor_type,
        "cpp_name": cpp_name(attribute),
        "cpp_type": idl_type.cpp_type,
        "cpp_type_initializer": idl_type.cpp_type_initializer,
        "deprecate_as": v8_utilities.deprecate_as(attribute),  # [DeprecateAs]
        "enum_type": idl_type.enum_type,
        "enum_values": idl_type.enum_values,
        "exposed_test": v8_utilities.exposed(attribute, interface),  # [Exposed]
        "has_custom_getter": has_custom_getter(attribute),
        "has_custom_setter": has_custom_setter(attribute),
        "has_setter": has_setter(attribute),
        "idl_type": str(idl_type),  # need trailing [] on array for Dictionary::ConversionContext::setConversionType
        "is_api_experiment_enabled": v8_utilities.api_experiment_enabled_function(attribute)
        or v8_utilities.api_experiment_enabled_function(interface),  # [APIExperimentEnabled]
        "is_call_with_execution_context": has_extended_attribute_value(attribute, "CallWith", "ExecutionContext"),
        "is_call_with_script_state": has_extended_attribute_value(attribute, "CallWith", "ScriptState"),
        "is_check_security_for_receiver": is_check_security_for_receiver,
        "is_check_security_for_return_value": is_check_security_for_return_value,
        "is_custom_element_callbacks": is_custom_element_callbacks,
        # TODO(yukishiino): Make all DOM attributes accessor-type properties.
        "is_data_type_property": constructor_type or interface.name == "Window" or interface.name == "Location",
        "is_getter_raises_exception": "RaisesException" in extended_attributes  # [RaisesException]
        and extended_attributes["RaisesException"] in (None, "Getter"),
        "is_implemented_in_private_script": is_implemented_in_private_script,
        "is_keep_alive_for_gc": keep_alive_for_gc,
        "is_lenient_this": "LenientThis" in extended_attributes,
        "is_nullable": idl_type.is_nullable,
        "is_explicit_nullable": idl_type.is_explicit_nullable,
        "is_partial_interface_member": "PartialInterfaceImplementedAs" in extended_attributes,
        "is_per_world_bindings": "PerWorldBindings" in extended_attributes,
        "is_put_forwards": "PutForwards" in extended_attributes,
        "is_read_only": attribute.is_read_only,
        "is_reflect": is_reflect,
        "is_replaceable": "Replaceable" in attribute.extended_attributes,
        "is_static": attribute.is_static,
        "is_url": "URL" in extended_attributes,
        "is_unforgeable": is_unforgeable(interface, attribute),
        "on_instance": v8_utilities.on_instance(interface, attribute),
        "on_interface": v8_utilities.on_interface(interface, attribute),
        "on_prototype": v8_utilities.on_prototype(interface, attribute),
        "use_output_parameter_for_result": idl_type.use_output_parameter_for_result,
        "measure_as": v8_utilities.measure_as(attribute, interface),  # [MeasureAs]
        "name": attribute.name,
        "only_exposed_to_private_script": is_only_exposed_to_private_script,
        "private_script_v8_value_to_local_cpp_value": idl_type.v8_value_to_local_cpp_value(
            extended_attributes, "v8Value", "cppValue", bailout_return_value="false", isolate="scriptState->isolate()"
        ),
        "property_attributes": property_attributes(interface, attribute),
        "reflect_empty": extended_attributes.get("ReflectEmpty"),
        "reflect_invalid": extended_attributes.get("ReflectInvalid", ""),
        "reflect_missing": extended_attributes.get("ReflectMissing"),
        "reflect_only": extended_attribute_value_as_list(attribute, "ReflectOnly"),
        "runtime_enabled_function": v8_utilities.runtime_enabled_function_name(attribute),  # [RuntimeEnabled]
        "should_be_exposed_to_script": not (is_implemented_in_private_script and is_only_exposed_to_private_script),
        "world_suffixes": ["", "ForMainWorld"]
        if "PerWorldBindings" in extended_attributes
        else [""],  # [PerWorldBindings]
    }

    if is_constructor_attribute(attribute):
        update_constructor_attribute_context(interface, attribute, context)
    if not has_custom_getter(attribute):
        getter_context(interface, attribute, context)
    if not has_custom_setter(attribute) and has_setter(attribute):
        setter_context(interface, attribute, context)

    return context

def attribute_context(interface, attribute):
    idl_type = attribute.idl_type
    base_idl_type = idl_type.base_type
    extended_attributes = attribute.extended_attributes

    idl_type.add_includes_for_type(extended_attributes)
    if idl_type.enum_values:
        includes.add('core/inspector/ConsoleMessage.h')

    # [CheckSecurity]
    is_do_not_check_security = 'DoNotCheckSecurity' in extended_attributes
    is_check_security_for_frame = (
        has_extended_attribute_value(interface, 'CheckSecurity', 'Frame') and
        not is_do_not_check_security)
    is_check_security_for_node = (
        has_extended_attribute_value(attribute, 'CheckSecurity', 'Node'))
    is_check_security_for_window = (
        has_extended_attribute_value(interface, 'CheckSecurity', 'Window') and
        not is_do_not_check_security)
    if is_check_security_for_frame or is_check_security_for_node or is_check_security_for_window:
        includes.add('bindings/core/v8/BindingSecurity.h')
    # [Constructor]
    # TODO(yukishiino): Constructors are much like methods although constructors
    # are not methods.  Constructors must be data-type properties, and we can
    # support them as a kind of methods.
    constructor_type = idl_type.constructor_type_name if is_constructor_attribute(attribute) else None
    # [CustomElementCallbacks], [Reflect]
    is_custom_element_callbacks = 'CustomElementCallbacks' in extended_attributes
    is_reflect = 'Reflect' in extended_attributes
    if is_custom_element_callbacks or is_reflect:
        includes.add('core/dom/custom/CustomElementProcessingStack.h')
    # [ImplementedInPrivateScript]
    is_implemented_in_private_script = 'ImplementedInPrivateScript' in extended_attributes
    if is_implemented_in_private_script:
        includes.add('bindings/core/v8/PrivateScriptRunner.h')
        includes.add('core/frame/LocalFrame.h')
        includes.add('platform/ScriptForbiddenScope.h')
    # [OnlyExposedToPrivateScript]
    is_only_exposed_to_private_script = 'OnlyExposedToPrivateScript' in extended_attributes
    # [PerWorldBindings]
    if 'PerWorldBindings' in extended_attributes:
        assert idl_type.is_wrapper_type or 'LogActivity' in extended_attributes, '[PerWorldBindings] should only be used with wrapper types: %s.%s' % (interface.name, attribute.name)

    if (base_idl_type == 'EventHandler' and
        interface.name in ['Window', 'WorkerGlobalScope'] and
        attribute.name == 'onerror'):
        includes.add('bindings/core/v8/V8ErrorHandler.h')

    cached_attribute_validation_method = extended_attributes.get('CachedAttribute')
    keep_alive_for_gc = is_keep_alive_for_gc(interface, attribute)
    if cached_attribute_validation_method or keep_alive_for_gc:
        includes.add('bindings/core/v8/V8HiddenValue.h')

    context = {
        'access_control_list': access_control_list(interface, attribute),
        'activity_logging_world_list_for_getter': v8_utilities.activity_logging_world_list(attribute, 'Getter'),  # [ActivityLogging]
        'activity_logging_world_list_for_setter': v8_utilities.activity_logging_world_list(attribute, 'Setter'),  # [ActivityLogging]
        'activity_logging_world_check': v8_utilities.activity_logging_world_check(attribute),  # [ActivityLogging]
        'argument_cpp_type': idl_type.cpp_type_args(used_as_rvalue_type=True),
        'cached_attribute_validation_method': cached_attribute_validation_method,
        'conditional_string': v8_utilities.conditional_string(attribute),
        'constructor_type': constructor_type,
        'cpp_name': cpp_name(attribute),
        'cpp_type': idl_type.cpp_type,
        'cpp_type_initializer': idl_type.cpp_type_initializer,
        'deprecate_as': v8_utilities.deprecate_as(attribute),  # [DeprecateAs]
        'enum_type': idl_type.enum_type,
        'enum_values': idl_type.enum_values,
        'exposed_test': v8_utilities.exposed(attribute, interface),  # [Exposed]
        'has_custom_getter': has_custom_getter(attribute),
        'has_custom_setter': has_custom_setter(attribute),
        'has_setter': has_setter(attribute),
        'idl_type': str(idl_type),  # need trailing [] on array for Dictionary::ConversionContext::setConversionType
        'is_call_with_execution_context': has_extended_attribute_value(attribute, 'CallWith', 'ExecutionContext'),
        'is_call_with_script_state': has_extended_attribute_value(attribute, 'CallWith', 'ScriptState'),
        'is_check_security_for_frame': is_check_security_for_frame,
        'is_check_security_for_node': is_check_security_for_node,
        'is_check_security_for_window': is_check_security_for_window,
        'is_custom_element_callbacks': is_custom_element_callbacks,
        # TODO(yukishiino): Make all DOM attributes accessor-type properties.
        'is_data_type_property': constructor_type or interface.name == 'Window' or interface.name == 'Location',
        'is_getter_raises_exception':  # [RaisesException]
            'RaisesException' in extended_attributes and
            extended_attributes['RaisesException'] in (None, 'Getter'),
        'is_implemented_in_private_script': is_implemented_in_private_script,
        'is_keep_alive_for_gc': keep_alive_for_gc,
        'is_lenient_this': 'LenientThis' in extended_attributes,
        'is_nullable': idl_type.is_nullable,
        'is_explicit_nullable': idl_type.is_explicit_nullable,
        'is_partial_interface_member':
            'PartialInterfaceImplementedAs' in extended_attributes,
        'is_per_world_bindings': 'PerWorldBindings' in extended_attributes,
        'is_put_forwards': 'PutForwards' in extended_attributes,
        'is_read_only': attribute.is_read_only,
        'is_reflect': is_reflect,
        'is_replaceable': 'Replaceable' in attribute.extended_attributes,
        'is_static': attribute.is_static,
        'is_url': 'URL' in extended_attributes,
        'is_unforgeable': is_unforgeable(interface, attribute),
        'on_instance': v8_utilities.on_instance(interface, attribute),
#.........这里部分代码省略.........

def method_context(interface, method, is_visible=True):
    arguments = method.arguments
    extended_attributes = method.extended_attributes
    idl_type = method.idl_type
    is_static = method.is_static
    name = method.name

    if is_visible:
        idl_type.add_includes_for_type(extended_attributes)

    this_cpp_value = cpp_value(interface, method, len(arguments))

    is_call_with_script_arguments = has_extended_attribute_value(method, 'CallWith', 'ScriptArguments')
    if is_call_with_script_arguments:
        includes.update(['bindings/core/v8/ScriptCallStack.h',
                         'core/inspector/ScriptArguments.h'])
    is_call_with_script_state = has_extended_attribute_value(method, 'CallWith', 'ScriptState')
    is_call_with_this_value = has_extended_attribute_value(method, 'CallWith', 'ThisValue')
    if is_call_with_script_state or is_call_with_this_value:
        includes.add('platform/bindings/ScriptState.h')

    # [CheckSecurity]
    is_cross_origin = 'CrossOrigin' in extended_attributes
    is_check_security_for_receiver = (
        has_extended_attribute_value(interface, 'CheckSecurity', 'Receiver') and
        not is_cross_origin)
    is_check_security_for_return_value = (
        has_extended_attribute_value(method, 'CheckSecurity', 'ReturnValue'))
    if is_check_security_for_receiver or is_check_security_for_return_value:
        includes.add('bindings/core/v8/BindingSecurity.h')

    is_ce_reactions = 'CEReactions' in extended_attributes
    if is_ce_reactions:
        includes.add('core/html/custom/CEReactionsScope.h')
    is_custom_element_callbacks = 'CustomElementCallbacks' in extended_attributes
    if is_custom_element_callbacks:
        includes.add('core/html/custom/V0CustomElementProcessingStack.h')

    is_raises_exception = 'RaisesException' in extended_attributes
    is_custom_call_prologue = has_extended_attribute_value(method, 'Custom', 'CallPrologue')
    is_custom_call_epilogue = has_extended_attribute_value(method, 'Custom', 'CallEpilogue')
    is_post_message = 'PostMessage' in extended_attributes
    if is_post_message:
        includes.add('bindings/core/v8/serialization/SerializedScriptValueFactory.h')
        includes.add('bindings/core/v8/serialization/Transferables.h')
        includes.add('core/typed_arrays/DOMArrayBufferBase.h')
        includes.add('core/imagebitmap/ImageBitmap.h')

    if 'LenientThis' in extended_attributes:
        raise Exception('[LenientThis] is not supported for operations.')

    argument_contexts = [
        argument_context(interface, method, argument, index, is_visible=is_visible)
        for index, argument in enumerate(arguments)]

    return {
        'activity_logging_world_list': v8_utilities.activity_logging_world_list(method),  # [ActivityLogging]
        'arguments': argument_contexts,
        'cpp_type': (v8_types.cpp_template_type('Nullable', idl_type.cpp_type)
                     if idl_type.is_explicit_nullable else idl_type.cpp_type),
        'cpp_value': this_cpp_value,
        'cpp_type_initializer': idl_type.cpp_type_initializer,
        'deprecate_as': v8_utilities.deprecate_as(method),  # [DeprecateAs]
        'do_not_test_new_object': 'DoNotTestNewObject' in extended_attributes,
        'exposed_test': v8_utilities.exposed(method, interface),  # [Exposed]
        'has_exception_state':
            is_raises_exception or
            is_check_security_for_receiver or
            any(argument for argument in arguments
                if (argument.idl_type.name == 'SerializedScriptValue' or
                    argument_conversion_needs_exception_state(method, argument))),
        'has_optional_argument_without_default_value':
            any(True for argument_context in argument_contexts
                if argument_context['is_optional_without_default_value']),
        'idl_type': idl_type.base_type,
        'is_call_with_execution_context': has_extended_attribute_value(method, 'CallWith', 'ExecutionContext'),
        'is_call_with_script_arguments': is_call_with_script_arguments,
        'is_call_with_script_state': is_call_with_script_state,
        'is_call_with_this_value': is_call_with_this_value,
        'is_ce_reactions': is_ce_reactions,
        'is_check_security_for_receiver': is_check_security_for_receiver,
        'is_check_security_for_return_value': is_check_security_for_return_value,
        'is_cross_origin': 'CrossOrigin' in extended_attributes,
        'is_custom': 'Custom' in extended_attributes and
            not (is_custom_call_prologue or is_custom_call_epilogue),
        'is_custom_call_prologue': is_custom_call_prologue,
        'is_custom_call_epilogue': is_custom_call_epilogue,
        'is_custom_element_callbacks': is_custom_element_callbacks,
        'is_explicit_nullable': idl_type.is_explicit_nullable,
        'is_new_object': 'NewObject' in extended_attributes,
        'is_partial_interface_member':
            'PartialInterfaceImplementedAs' in extended_attributes,
        'is_per_world_bindings': 'PerWorldBindings' in extended_attributes,
        'is_post_message': is_post_message,
        'is_raises_exception': is_raises_exception,
        'is_static': is_static,
        'is_unforgeable': is_unforgeable(interface, method),
        'is_variadic': arguments and arguments[-1].is_variadic,
        'measure_as': v8_utilities.measure_as(method, interface),  # [MeasureAs]
        'name': name,
#.........这里部分代码省略.........

#.........这里部分代码省略.........

    if "LenientThis" in extended_attributes:
        raise Exception("[LenientThis] is not supported for operations.")

    argument_contexts = [
        argument_context(interface, method, argument, index, is_visible=is_visible)
        for index, argument in enumerate(arguments)
    ]

    return {
        "activity_logging_world_list": v8_utilities.activity_logging_world_list(method),  # [ActivityLogging]
        "arguments": argument_contexts,
        "argument_declarations_for_private_script": argument_declarations_for_private_script(interface, method),
        "cpp_type": (
            v8_types.cpp_template_type("Nullable", idl_type.cpp_type)
            if idl_type.is_explicit_nullable
            else idl_type.cpp_type
        ),
        "cpp_value": this_cpp_value,
        "cpp_type_initializer": idl_type.cpp_type_initializer,
        "custom_registration_extended_attributes": CUSTOM_REGISTRATION_EXTENDED_ATTRIBUTES.intersection(
            extended_attributes.iterkeys()
        ),
        "deprecate_as": v8_utilities.deprecate_as(method),  # [DeprecateAs]
        "do_not_test_new_object": "DoNotTestNewObject" in extended_attributes,
        "exposed_test": v8_utilities.exposed(method, interface),  # [Exposed]
        # TODO(yukishiino): Retire has_custom_registration flag.  Should be
        # replaced with V8DOMConfiguration::PropertyLocationConfiguration.
        "has_custom_registration": v8_utilities.has_extended_attribute(method, CUSTOM_REGISTRATION_EXTENDED_ATTRIBUTES),
        "has_exception_state": is_raises_exception
        or is_check_security_for_receiver
        or any(
            argument
            for argument in arguments
            if (
                argument.idl_type.name == "SerializedScriptValue"
                or argument_conversion_needs_exception_state(method, argument)
            )
        ),
        "has_optional_argument_without_default_value": any(
            True for argument_context in argument_contexts if argument_context["is_optional_without_default_value"]
        ),
        "idl_type": idl_type.base_type,
        "is_call_with_execution_context": has_extended_attribute_value(method, "CallWith", "ExecutionContext"),
        "is_call_with_script_arguments": is_call_with_script_arguments,
        "is_call_with_script_state": is_call_with_script_state,
        "is_call_with_this_value": is_call_with_this_value,
        "is_ce_reactions": is_ce_reactions,
        "is_check_security_for_receiver": is_check_security_for_receiver,
        "is_check_security_for_return_value": is_check_security_for_return_value,
        "is_custom": "Custom" in extended_attributes and not (is_custom_call_prologue or is_custom_call_epilogue),
        "is_custom_call_prologue": is_custom_call_prologue,
        "is_custom_call_epilogue": is_custom_call_epilogue,
        "is_custom_element_callbacks": is_custom_element_callbacks,
        "is_do_not_check_security": is_do_not_check_security,
        "is_explicit_nullable": idl_type.is_explicit_nullable,
        "is_implemented_in_private_script": is_implemented_in_private_script,
        "is_new_object": "NewObject" in extended_attributes,
        "is_partial_interface_member": "PartialInterfaceImplementedAs" in extended_attributes,
        "is_per_world_bindings": "PerWorldBindings" in extended_attributes,
        "is_post_message": is_post_message,
        "is_raises_exception": is_raises_exception,
        "is_static": is_static,
        "is_unforgeable": is_unforgeable(interface, method),
        "is_variadic": arguments and arguments[-1].is_variadic,
        "measure_as": v8_utilities.measure_as(method, interface),  # [MeasureAs]
        "name": name,
        "number_of_arguments": len(arguments),
        "number_of_required_arguments": len(
            [argument for argument in arguments if not (argument.is_optional or argument.is_variadic)]
        ),
        "number_of_required_or_variadic_arguments": len(
            [argument for argument in arguments if not argument.is_optional]
        ),
        "on_instance": v8_utilities.on_instance(interface, method),
        "on_interface": v8_utilities.on_interface(interface, method),
        "on_prototype": v8_utilities.on_prototype(interface, method),
        "only_exposed_to_private_script": is_only_exposed_to_private_script,
        "origin_trial_enabled_function": v8_utilities.origin_trial_enabled_function_name(
            method
        ),  # [OriginTrialEnabled]
        "origin_trial_feature_name": v8_utilities.origin_trial_feature_name(method),  # [OriginTrialEnabled]
        "private_script_v8_value_to_local_cpp_value": idl_type.v8_value_to_local_cpp_value(
            extended_attributes, "v8Value", "cppValue", isolate="scriptState->isolate()", bailout_return_value="false"
        ),
        "property_attributes": property_attributes(interface, method),
        "returns_promise": method.returns_promise,
        "runtime_enabled_function": v8_utilities.runtime_enabled_function_name(method),  # [RuntimeEnabled]
        "should_be_exposed_to_script": not (is_implemented_in_private_script and is_only_exposed_to_private_script),
        "use_output_parameter_for_result": idl_type.use_output_parameter_for_result,
        "use_local_result": use_local_result(method),
        "v8_set_return_value": v8_set_return_value(interface.name, method, this_cpp_value),
        "v8_set_return_value_for_main_world": v8_set_return_value(
            interface.name, method, this_cpp_value, for_main_world=True
        ),
        "visible": is_visible,
        "world_suffixes": ["", "ForMainWorld"]
        if "PerWorldBindings" in extended_attributes
        else [""],  # [PerWorldBindings],
    }