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1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file | |
eernst
2017/09/04 17:04:56
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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. | |
4 | |
5 import "package:expect/expect.dart"; | |
6 | |
7 // Test of parameterized types with invalid bounds. | |
8 | |
9 abstract class J<T> {} | |
10 | |
11 abstract class K<T> {} | |
12 | |
13 abstract class I< | |
14 T | |
15 extends num //# 00: continued | |
16 extends num //# 01: continued | |
17 extends num //# 02: continued | |
18 extends num //# 03: continued | |
19 extends num //# 04: continued | |
20 extends num //# 05: continued | |
21 extends num //# 06: continued | |
22 > {} | |
23 | |
24 class A<T> implements I<T>, J<T> {} | |
25 | |
26 main() { | |
27 var a = new A<String>(); | |
28 | |
29 { | |
30 I i = a; // //# 00: dynamic type error, static type warning | |
31 J j = a; // //# 01: static type warning | |
32 K k = a; // //# 02: dynamic type error, static type warning | |
33 | |
34 // In production mode, A<String> is subtype of I, error in checked mode. | |
35 var x = a is I; // //# 03: dynamic type error, static type warning | |
36 | |
37 // In both production and checked modes, A<String> is a subtype of J. | |
38 Expect.isTrue(a is J); // //# 04: static type warning | |
39 | |
40 // In both production and checked modes, A<String> is not a subtype of K. | |
41 // However, while unsuccessfully trying to prove that A<String> is a K, | |
42 // a malformed type is encountered in checked mode, resulting in a dynamic | |
43 // type error. | |
44 Expect.isTrue(a is !K); // //# 05: dynamic type error, static type warning | |
45 } | |
46 | |
47 a = new A<int>(); | |
48 | |
49 { | |
50 I i = a; | |
51 J j = a; | |
52 K k = a; // //# 06: dynamic type error, static type warning | |
53 | |
54 // In both production and checked modes, A<int> is a subtype of I. | |
55 Expect.isTrue(a is I); | |
56 | |
57 // In both production and checked modes, A<int> is a subtype of J. | |
58 Expect.isTrue(a is J); | |
59 | |
60 // In both production and checked modes, A<int> is not a subtype of K. | |
61 Expect.isTrue(a is! K); | |
62 } | |
63 } | |
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