| // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| part of dart.async; |
| |
| /// Indicates that loading of [libraryName] is deferred. |
| /// |
| /// This class is obsolete. Instead use the syntax: |
| /// ```dart |
| /// import "library.dart" deferred as prefix; |
| /// ``` |
| @Deprecated("Dart sdk v. 1.8") |
| class DeferredLibrary { |
| final String libraryName; |
| final String? uri; |
| |
| const DeferredLibrary(this.libraryName, {this.uri}); |
| |
| /// Ensure that [libraryName] has been loaded. |
| /// |
| /// If the library fails to load, the [Future] will complete with a |
| /// [DeferredLoadException]. |
| external Future<Null> load(); |
| } |
| |
| /// Thrown when a deferred library fails to load. |
| class DeferredLoadException implements Exception { |
| DeferredLoadException(String message) : _s = message; |
| String toString() => "DeferredLoadException: '$_s'"; |
| final String _s; |
| } |