.

qwen/nodejs/node_modules/side-channel-weakmap/index.js

@@ -0,0 +1,84 @@
+'use strict';
+
+var GetIntrinsic = require('get-intrinsic');
+var callBound = require('call-bound');
+var inspect = require('object-inspect');
+var getSideChannelMap = require('side-channel-map');
+
+var $TypeError = require('es-errors/type');
+var $WeakMap = GetIntrinsic('%WeakMap%', true);
+
+/** @type {<K extends object, V>(thisArg: WeakMap<K, V>, key: K) => V} */
+var $weakMapGet = callBound('WeakMap.prototype.get', true);
+/** @type {<K extends object, V>(thisArg: WeakMap<K, V>, key: K, value: V) => void} */
+var $weakMapSet = callBound('WeakMap.prototype.set', true);
+/** @type {<K extends object, V>(thisArg: WeakMap<K, V>, key: K) => boolean} */
+var $weakMapHas = callBound('WeakMap.prototype.has', true);
+/** @type {<K extends object, V>(thisArg: WeakMap<K, V>, key: K) => boolean} */
+var $weakMapDelete = callBound('WeakMap.prototype.delete', true);
+
+/** @type {import('.')} */
+module.exports = $WeakMap
+	? /** @type {Exclude<import('.'), false>} */ function getSideChannelWeakMap() {
+		/** @typedef {ReturnType<typeof getSideChannelWeakMap>} Channel */
+		/** @typedef {Parameters<Channel['get']>[0]} K */
+		/** @typedef {Parameters<Channel['set']>[1]} V */
+
+		/** @type {WeakMap<K & object, V> | undefined} */ var $wm;
+		/** @type {Channel | undefined} */ var $m;
+
+		/** @type {Channel} */
+		var channel = {
+			assert: function (key) {
+				if (!channel.has(key)) {
+					throw new $TypeError('Side channel does not contain ' + inspect(key));
+				}
+			},
+			'delete': function (key) {
+				if ($WeakMap && key && (typeof key === 'object' || typeof key === 'function')) {
+					if ($wm) {
+						return $weakMapDelete($wm, key);
+					}
+				} else if (getSideChannelMap) {
+					if ($m) {
+						return $m['delete'](key);
+					}
+				}
+				return false;
+			},
+			get: function (key) {
+				if ($WeakMap && key && (typeof key === 'object' || typeof key === 'function')) {
+					if ($wm) {
+						return $weakMapGet($wm, key);
+					}
+				}
+				return $m && $m.get(key);
+			},
+			has: function (key) {
+				if ($WeakMap && key && (typeof key === 'object' || typeof key === 'function')) {
+					if ($wm) {
+						return $weakMapHas($wm, key);
+					}
+				}
+				return !!$m && $m.has(key);
+			},
+			set: function (key, value) {
+				if ($WeakMap && key && (typeof key === 'object' || typeof key === 'function')) {
+					if (!$wm) {
+						$wm = new $WeakMap();
+					}
+					$weakMapSet($wm, key, value);
+				} else if (getSideChannelMap) {
+					if (!$m) {
+						$m = getSideChannelMap();
+					}
+					// eslint-disable-next-line no-extra-parens
+					/** @type {NonNullable<typeof $m>} */ ($m).set(key, value);
+				}
+			}
+		};
+
+		// @ts-expect-error TODO: figure out why this is erroring
+		return channel;
+	}
+	: getSideChannelMap;