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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 | 4 |
5 import "package:expect/expect.dart"; | 5 import "package:expect/expect.dart"; |
6 | 6 |
7 int inscrutable(int x) => x == 0 ? 0 : x | inscrutable(x & (x - 1)); | 7 int inscrutable(int x) => x == 0 ? 0 : x | inscrutable(x & (x - 1)); |
8 | 8 |
9 foo() { | 9 foo() { |
10 int x = 0; | 10 int x = 0; |
11 if (inscrutable(0) == 0) x = -2; // x is now in range [-2 .. 0]. | 11 if (inscrutable(0) == 0) x = -2; // x is now in range [-2 .. 0]. |
12 int y = 2; | 12 int y = 2; |
13 if (inscrutable(0) == 0) y = 4; // y is now in range [2 .. 4]. | 13 if (inscrutable(0) == 0) y = 4; // y is now in range [2 .. 4]. |
14 int i = y - x; // i should be in range [2 .. 6]. | 14 int i = y - x; // i should be in range [2 .. 6]. |
15 i -= 4; // i should be in range [-2 .. 2]. Actual value: 2. | 15 i -= 4; // i should be in range [-2 .. 2]. Actual value: 2. |
16 var a = const [1]; | 16 var a = const [1]; |
17 return a[i]; | 17 return a[i]; |
18 } | 18 } |
19 | 19 |
20 main() { | 20 main() { |
21 Expect.throws(() => foo(), | 21 Expect.throws(() => foo(), (e) => e is RangeError); |
22 (e) => e is RangeError); | |
23 } | 22 } |
24 | |
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