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1 // Copyright (c) 2016, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2016, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
4 | 4 |
5 import 'dart:async'; | 5 import 'dart:async'; |
6 | 6 |
7 import '../result.dart'; | 7 import '../result.dart'; |
8 import 'error.dart'; | 8 import 'error.dart'; |
9 | 9 |
10 /// A result representing a returned value. | 10 /// A result representing a returned value. |
11 class ValueResult<T> implements Result<T> { | 11 class ValueResult<T> implements Result<T> { |
12 final T value; | 12 final T value; |
13 | 13 |
14 bool get isValue => true; | 14 bool get isValue => true; |
15 bool get isError => false; | 15 bool get isError => false; |
16 ValueResult<T> get asValue => this; | 16 ValueResult<T> get asValue => this; |
17 ErrorResult get asError => null; | 17 ErrorResult<T> get asError => null; |
18 | 18 |
19 ValueResult(this.value); | 19 ValueResult(this.value); |
20 | 20 |
21 void complete(Completer<T> completer) { | 21 void complete(Completer<T> completer) { |
22 completer.complete(value); | 22 completer.complete(value); |
23 } | 23 } |
24 | 24 |
25 void addTo(EventSink<T> sink) { | 25 void addTo(EventSink<T> sink) { |
26 sink.add(value); | 26 sink.add(value); |
27 } | 27 } |
28 | 28 |
29 Future<T> get asFuture => new Future.value(value); | 29 Future<T> get asFuture => new Future.value(value); |
30 } | 30 } |
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