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

packages/forms/src/directives/normalize_validator.ts

@@ -0,0 +1,27 @@
+/**
+ * @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 {AbstractControl} from '../model';
+import {AsyncValidator, AsyncValidatorFn, Validator, ValidatorFn} from './validators';
+
+export function normalizeValidator(validator: ValidatorFn | Validator): ValidatorFn {
+  if ((<Validator>validator).validate) {
+    return (c: AbstractControl) => (<Validator>validator).validate(c);
+  } else {
+    return <ValidatorFn>validator;
+  }
+}
+
+export function normalizeAsyncValidator(validator: AsyncValidatorFn | AsyncValidator):
+    AsyncValidatorFn {
+  if ((<AsyncValidator>validator).validate) {
+    return (c: AbstractControl) => (<AsyncValidator>validator).validate(c);
+  } else {
+    return <AsyncValidatorFn>validator;
+  }
+}