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

packages/core/src/i18n/tokens.ts

@@ -0,0 +1,33 @@
+/**
+ * @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
+ */
+
+import {InjectionToken} from '../di/injection_token';
+
+/**
+ * @experimental i18n support is experimental.
+ */
+export const LOCALE_ID = new InjectionToken<string>('LocaleId');
+
+/**
+ * @experimental i18n support is experimental.
+ */
+export const TRANSLATIONS = new InjectionToken<string>('Translations');
+
+/**
+ * @experimental i18n support is experimental.
+ */
+export const TRANSLATIONS_FORMAT = new InjectionToken<string>('TranslationsFormat');
+
+/**
+ * @experimental i18n support is experimental.
+ */
+export enum MissingTranslationStrategy {
+  Error,
+  Warning,
+  Ignore,
+}