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1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file | |
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 // Test efficient and correct implementation of !identical(a, b). | |
5 // VMOptions=--optimization-counter-threshold=10 --no-background-compilation | |
6 | |
7 import 'package:expect/expect.dart'; | |
8 | |
9 notIdenticalTest1(a) { | |
10 if (!identical("ho", a)) { | |
11 return 2; | |
12 } else { | |
13 return 1; | |
14 } | |
15 } | |
16 | |
17 notIdenticalTest2(a) { | |
18 var x = identical("ho", a); | |
19 if (!x) { | |
20 Expect.equals(false, x); | |
21 return x; | |
22 } else { | |
23 Expect.equals(true, x); | |
24 return 1; | |
25 } | |
26 } | |
27 | |
28 notIdenticalTest3(a) { | |
29 var x = identical("ho", a); | |
30 return !x; | |
31 } | |
32 | |
33 main() { | |
34 for (int i = 0; i < 20; i++) { | |
35 Expect.equals(1, notIdenticalTest1("ho")); | |
36 Expect.equals(1, notIdenticalTest2("ho")); | |
37 Expect.equals(false, notIdenticalTest3("ho")); | |
38 } | |
39 } | |
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