-var hex = /^[+-]?0[Xx]/;
-var FORCED = $parseInt(whitespaces + '08') !== 8 || $parseInt(whitespaces + '0x16') !== 22;
+var Symbol = global.Symbol;
+var ITERATOR = Symbol && Symbol.iterator;
+var hex = /^[+-]?0x/i;
+var exec = uncurryThis(hex.exec);
+var FORCED = $parseInt(whitespaces + '08') !== 8 || $parseInt(whitespaces + '0x16') !== 22
+ // MS Edge 18- broken with boxed symbols
+ || (ITERATOR && !fails(function () { $parseInt(Object(ITERATOR)); }));