ubdate

node_modules/es6-symbol/is-implemented.js

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+"use strict";
+
+var global     = require("ext/global-this")
+  , validTypes = { object: true, symbol: true };
+
+module.exports = function () {
+	var Symbol = global.Symbol;
+	var symbol;
+	if (typeof Symbol !== "function") return false;
+	symbol = Symbol("test symbol");
+	try { String(symbol); }
+	catch (e) { return false; }
+
+	// Return 'true' also for polyfills
+	if (!validTypes[typeof Symbol.iterator]) return false;
+	if (!validTypes[typeof Symbol.toPrimitive]) return false;
+	if (!validTypes[typeof Symbol.toStringTag]) return false;
+
+	return true;
+};