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1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2012, 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 // VMOptions=--enable_checked_mode | 4 // VMOptions=--enable_checked_mode |
5 | 5 |
6 import "dart:collection"; | 6 import "dart:collection"; |
7 | 7 |
8 abstract class Link<T> extends IterableBase<T> { | 8 abstract class Link<T> extends IterableBase<T> { |
9 factory Link(T head, [Link<T> tail]) = LinkEntry<T>; | 9 factory Link(T head, [Link<T> tail]) = LinkEntry<T>; |
10 Link<T> prepend(T element); | 10 Link<T> prepend(T element); |
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36 class Fisk { | 36 class Fisk { |
37 Link<Fisk> nodes = const EmptyLink<Fisk>(); | 37 Link<Fisk> nodes = const EmptyLink<Fisk>(); |
38 final int id; | 38 final int id; |
39 Fisk(this.id); | 39 Fisk(this.id); |
40 toString() => id.toString(); | 40 toString() => id.toString(); |
41 } | 41 } |
42 | 42 |
43 main() { | 43 main() { |
44 new Fisk(0).nodes.prepend(new Fisk(1)).prepend(new Fisk(2)); | 44 new Fisk(0).nodes.prepend(new Fisk(1)).prepend(new Fisk(2)); |
45 } | 45 } |
46 | |
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