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30 lines
921 B
JavaScript
30 lines
921 B
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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"use strict";
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module.metadata = {
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"stability": "experimental"
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};
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const method = require("../../method/core");
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const { Class } = require("./heritage");
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// Object that inherit or mix WeakRefence inn will register
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// weak observes for system notifications.
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const WeakReference = Class({});
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exports.WeakReference = WeakReference;
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// If `isWeak(object)` is `true` observer installed
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// for such `object` will be weak, meaning that it will
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// be GC-ed if nothing else but observer is observing it.
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// By default everything except `WeakReference` will return
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// `false`.
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const isWeak = method("reference/weak?");
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exports.isWeak = isWeak;
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isWeak.define(Object, _ => false);
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isWeak.define(WeakReference, _ => true);
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