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// Copyright 2019 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
bitfield struct PrototypeInfoFlags extends uint31 {
should_be_fast: bool: 1 bit;
}
extern class PrototypeInfo extends Struct {
// [module_namespace]: A backpointer to JSModuleNamespace from its
// PrototypeInfo (or undefined). This field is only used for JSModuleNamespace
// maps. TODO(jkummerow): Figure out if there's a way to store the namespace
// pointer elsewhere to save memory.
module_namespace: JSModuleNamespace|Undefined;
// [prototype_users]: WeakArrayList containing weak references to maps using
// this prototype, or Smi(0) if uninitialized.
prototype_users: WeakArrayList|Zero;
prototype_chain_enum_cache: FixedArray|Zero|Undefined;
// [registry_slot]: Slot in prototype's user registry where this user
// is stored. Returns UNREGISTERED if this prototype has not been registered.
registry_slot: Smi;
bit_field: SmiTagged<PrototypeInfoFlags>;
// [object_create_map]: A field caching the map for Object.create(prototype).
object_create_map: Weak<Map>|Undefined;
}
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