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author | Matt A. Tobin <email@mattatobin.com> | 2018-02-10 02:51:36 -0500 |
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committer | Matt A. Tobin <email@mattatobin.com> | 2018-02-10 02:51:36 -0500 |
commit | 37d5300335d81cecbecc99812747a657588c63eb (patch) | |
tree | 765efa3b6a56bb715d9813a8697473e120436278 /toolkit/jetpack/sdk/core/reference.js | |
parent | b2bdac20c02b12f2057b9ef70b0a946113a00e00 (diff) | |
parent | 4fb11cd5966461bccc3ed1599b808237be6b0de9 (diff) | |
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Merge branch 'ext-work'
Diffstat (limited to 'toolkit/jetpack/sdk/core/reference.js')
-rw-r--r-- | toolkit/jetpack/sdk/core/reference.js | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/toolkit/jetpack/sdk/core/reference.js b/toolkit/jetpack/sdk/core/reference.js new file mode 100644 index 000000000..04549cd0f --- /dev/null +++ b/toolkit/jetpack/sdk/core/reference.js @@ -0,0 +1,29 @@ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +"use strict"; + +module.metadata = { + "stability": "experimental" +}; + +const method = require("../../method/core"); +const { Class } = require("./heritage"); + +// Object that inherit or mix WeakRefence inn will register +// weak observes for system notifications. +const WeakReference = Class({}); +exports.WeakReference = WeakReference; + + +// If `isWeak(object)` is `true` observer installed +// for such `object` will be weak, meaning that it will +// be GC-ed if nothing else but observer is observing it. +// By default everything except `WeakReference` will return +// `false`. +const isWeak = method("reference/weak?"); +exports.isWeak = isWeak; + +isWeak.define(Object, _ => false); +isWeak.define(WeakReference, _ => true); |