// 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.

@abstract
@cppObjectLayoutDefinition
extern class JSCollection extends JSObject {
  // The backing hash table.
  //
  // Use StableOrderedHasSet or StableOrderedHashMap to read.
  table: Object;
}
@cppObjectLayoutDefinition
extern class JSSet extends JSCollection {}
@cppObjectLayoutDefinition
extern class JSMap extends JSCollection {}

@abstract
@cppObjectLayoutDefinition
extern class JSWeakCollection extends JSObject {
  // The backing hash table mapping keys to values.
  table: Object;
}
@cppObjectLayoutDefinition
extern class JSWeakSet extends JSWeakCollection {}
@cppObjectLayoutDefinition
extern class JSWeakMap extends JSWeakCollection {}

@abstract
@cppObjectLayoutDefinition
extern class JSMapIterator extends JSCollectionIterator {}
extern class JSMapKeyIterator extends JSMapIterator
    generates 'JSMapIterator';
extern class JSMapKeyValueIterator extends JSMapIterator
    generates 'JSMapIterator';
extern class JSMapValueIterator extends JSMapIterator
    generates 'JSMapIterator';

@abstract
@cppObjectLayoutDefinition
extern class JSSetIterator extends JSCollectionIterator {}
extern class JSSetKeyValueIterator extends JSSetIterator
    generates 'JSSetIterator';
extern class JSSetValueIterator extends JSSetIterator
    generates 'JSSetIterator';

transient type JSSetWithNoCustomIteration extends JSSet;
transient type JSMapWithNoCustomIteration extends JSMap;

// Use these types to read. Used to track user code modifying the underlying
// table.
transient type StableOrderedHashSet extends OrderedHashSet;
transient type StableOrderedHashMap extends OrderedHashMap;