source: imaps-frontend/node_modules/is-weakset/index.js

'use strict';

var GetIntrinsic = require('get-intrinsic');
var callBound = require('call-bind/callBound');

var $WeakSet = GetIntrinsic('%WeakSet%', true);

var $setHas = callBound('WeakSet.prototype.has', true);

if ($setHas) {
        var $mapHas = callBound('WeakMap.prototype.has', true);

        /** @type {import('.')} */
        module.exports = function isWeakSet(x) {
                if (!x || typeof x !== 'object') {
                        return false;
                }
                try {
                        $setHas(x, $setHas);
                        if ($mapHas) {
                                try {
                                        $mapHas(x, $mapHas);
                                } catch (e) {
                                        return true;
                                }
                        }
                        // @ts-expect-error TS can't figure out that $WeakSet is always truthy here
                        return x instanceof $WeakSet; // core-js workaround, pre-v3
                } catch (e) {}
                return false;
        };
} else {
        /** @type {import('.')} */
        // eslint-disable-next-line no-unused-vars
        module.exports = function isWeakSet(x) {
                // `WeakSet` does not exist, or does not have a `has` method
                return false;
        };
}