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1 // Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2011, 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 "package:expect/expect.dart"; | |
6 | |
7 // Checks that a method with an instantiated return type can override a method | 5 // Checks that a method with an instantiated return type can override a method |
8 // with a generic return type. | 6 // with a generic return type. |
9 | 7 |
10 typedef V RemoveFunctionType<K, V>(K key); | 8 typedef V RemoveFunctionType<K, V>(K key); |
11 | 9 |
12 class MapBase<K, V> implements Map<K, V> { | 10 class MapBase<K, V> implements Map<K, V> { |
13 K remove(K key) { | 11 K remove(K key) { |
14 throw 'Must be implemented'; | 12 throw 'Must be implemented'; |
15 } | 13 } |
16 | 14 |
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52 | 50 |
53 // Perform a few more tests. | 51 // Perform a few more tests. |
54 x.Tests(); | 52 x.Tests(); |
55 | 53 |
56 var m = new MapBase<int, int>(); | 54 var m = new MapBase<int, int>(); |
57 Expect.isTrue(m.remove is RemoveFunctionType<int, int>); | 55 Expect.isTrue(m.remove is RemoveFunctionType<int, int>); |
58 | 56 |
59 // Perform a few more tests. | 57 // Perform a few more tests. |
60 m.Tests(); | 58 m.Tests(); |
61 } | 59 } |
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