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/*! *****************************************************************************
Copyright (c) Microsoft Corporation. All rights reserved.
Licensed under the Apache License, Version 2.0 (the "License"); you may not use
this file except in compliance with the License. You may obtain a copy of the
License at http://www.apache.org/licenses/LICENSE-2.0
THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
MERCHANTABLITY OR NON-INFRINGEMENT.
See the Apache Version 2.0 License for specific language governing permissions
and limitations under the License.
***************************************************************************** */
/// <reference no-default-lib="true"/>
interface WeakRef<T extends object> {
readonly [Symbol.toStringTag]: "WeakRef";
/**
* Returns the WeakRef instance's target object, or undefined if the target object has been
* reclaimed.
*/
deref(): T | undefined;
}
interface WeakRefConstructor {
readonly prototype: WeakRef<any>;
/**
* Creates a WeakRef instance for the given target object.
* @param target The target object for the WeakRef instance.
*/
new<T extends object>(target: T): WeakRef<T>;
}
declare var WeakRef: WeakRefConstructor;
interface FinalizationRegistry<T> {
readonly [Symbol.toStringTag]: "FinalizationRegistry";
/**
* Registers an object with the registry.
* @param target The target object to register.
* @param heldValue The value to pass to the finalizer for this object. This cannot be the
* target object.
* @param unregisterToken The token to pass to the unregister method to unregister the target
* object. If provided (and not undefined), this must be an object. If not provided, the target
* cannot be unregistered.
*/
register(target: object, heldValue: T, unregisterToken?: object): void;
/**
* Unregisters an object from the registry.
* @param unregisterToken The token that was used as the unregisterToken argument when calling
* register to register the target object.
*/
unregister(unregisterToken: object): void;
}
interface FinalizationRegistryConstructor {
readonly prototype: FinalizationRegistry<any>;
/**
* Creates a finalization registry with an associated cleanup callback
* @param cleanupCallback The callback to call after an object in the registry has been reclaimed.
*/
new<T>(cleanupCallback: (heldValue: T) => void): FinalizationRegistry<T>;
}
declare var FinalizationRegistry: FinalizationRegistryConstructor;
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