refactor: move angular source to /packages rather than modules/@angular

packages/core/src/util.ts

@@ -0,0 +1,74 @@
+/**
+ * @license
+ * Copyright Google Inc. All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+
+// TODO(jteplitz602): Load WorkerGlobalScope from lib.webworker.d.ts file #3492
+declare var WorkerGlobalScope: any /** TODO #9100 */;
+// CommonJS / Node have global context exposed as "global" variable.
+// We don't want to include the whole node.d.ts this this compilation unit so we'll just fake
+// the global "global" var for now.
+declare var global: any /** TODO #9100 */;
+const __window = typeof window !== 'undefined' && window;
+const __self = typeof self !== 'undefined' && typeof WorkerGlobalScope !== 'undefined' &&
+    self instanceof WorkerGlobalScope && self;
+const __global = typeof global !== 'undefined' && global;
+const _global: {[name: string]: any} = __window || __global || __self;
+export {_global as global};
+
+// When Symbol.iterator doesn't exist, retrieves the key used in es6-shim
+declare const Symbol: any;
+let _symbolIterator: any = null;
+export function getSymbolIterator(): string|symbol {
+  if (!_symbolIterator) {
+    const Symbol = _global['Symbol'];
+    if (Symbol && Symbol.iterator) {
+      _symbolIterator = Symbol.iterator;
+    } else {
+      // es6-shim specific logic
+      const keys = Object.getOwnPropertyNames(Map.prototype);
+      for (let i = 0; i < keys.length; ++i) {
+        const key = keys[i];
+        if (key !== 'entries' && key !== 'size' &&
+            (Map as any).prototype[key] === Map.prototype['entries']) {
+          _symbolIterator = key;
+        }
+      }
+    }
+  }
+  return _symbolIterator;
+}
+
+export function scheduleMicroTask(fn: Function) {
+  Zone.current.scheduleMicroTask('scheduleMicrotask', fn);
+}
+
+// JS has NaN !== NaN
+export function looseIdentical(a: any, b: any): boolean {
+  return a === b || typeof a === 'number' && typeof b === 'number' && isNaN(a) && isNaN(b);
+}
+
+export function stringify(token: any): string {
+  if (typeof token === 'string') {
+    return token;
+  }
+
+  if (token == null) {
+    return '' + token;
+  }
+
+  if (token.overriddenName) {
+    return `${token.overriddenName}`;
+  }
+
+  if (token.name) {
+    return `${token.name}`;
+  }
+
+  const res = token.toString();
+  const newLineIndex = res.indexOf('\n');
+  return newLineIndex === -1 ? res : res.substring(0, newLineIndex);
+}