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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 /// The result of a successful computation. |
12 final T value; | 13 final T value; |
13 | 14 |
14 bool get isValue => true; | 15 bool get isValue => true; |
15 bool get isError => false; | 16 bool get isError => false; |
16 ValueResult<T> get asValue => this; | 17 ValueResult<T> get asValue => this; |
17 ErrorResult<T> get asError => null; | 18 ErrorResult get asError => null; |
18 | 19 |
19 ValueResult(this.value); | 20 ValueResult(this.value); |
20 | 21 |
21 void complete(Completer<T> completer) { | 22 void complete(Completer<T> completer) { |
22 completer.complete(value); | 23 completer.complete(value); |
23 } | 24 } |
24 | 25 |
25 void addTo(EventSink<T> sink) { | 26 void addTo(EventSink<T> sink) { |
26 sink.add(value); | 27 sink.add(value); |
27 } | 28 } |
28 | 29 |
29 Future<T> get asFuture => new Future.value(value); | 30 Future<T> get asFuture => new Future.value(value); |
| 31 |
| 32 int get hashCode => value.hashCode ^ 0x323f1d61; |
| 33 |
| 34 bool operator ==(Object other) => |
| 35 other is ValueResult && value == other.value; |
30 } | 36 } |
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