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

packages/compiler/src/ng_module_resolver.ts

@@ -0,0 +1,38 @@
+/**
+ * @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 {NgModule, Type, ɵReflectorReader, ɵreflector, ɵstringify as stringify} from '@angular/core';
+import {findLast} from './directive_resolver';
+import {CompilerInjectable} from './injectable';
+
+function _isNgModuleMetadata(obj: any): obj is NgModule {
+  return obj instanceof NgModule;
+}
+
+/**
+ * Resolves types to {@link NgModule}.
+ */
+@CompilerInjectable()
+export class NgModuleResolver {
+  constructor(private _reflector: ɵReflectorReader = ɵreflector) {}
+
+  isNgModule(type: any) { return this._reflector.annotations(type).some(_isNgModuleMetadata); }
+
+  resolve(type: Type<any>, throwIfNotFound = true): NgModule {
+    const ngModuleMeta: NgModule = findLast(this._reflector.annotations(type), _isNgModuleMetadata);
+
+    if (ngModuleMeta) {
+      return ngModuleMeta;
+    } else {
+      if (throwIfNotFound) {
+        throw new Error(`No NgModule metadata found for '${stringify(type)}'.`);
+      }
+      return null;
+    }
+  }
+}