OLD | NEW |
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"; | |
6 | |
7 // Make sure we use JavaScript semantics when compiling compile-time constants. | 5 // Make sure we use JavaScript semantics when compiling compile-time constants. |
8 // In this case we test that the value-range analysis uses JavaScript semantics | 6 // In this case we test that the value-range analysis uses JavaScript semantics |
9 // too. | 7 // too. |
10 | 8 |
11 int inscrutable(int x) => x == 0 ? 0 : x | inscrutable(x & (x - 1)); | 9 int inscrutable(int x) => x == 0 ? 0 : x | inscrutable(x & (x - 1)); |
12 | 10 |
13 foo() { | 11 foo() { |
14 var a = const [1, 2]; | 12 var a = const [1, 2]; |
15 var i = 0x100000000; | 13 var i = 0x100000000; |
16 if (inscrutable(i) == 0) { | 14 if (inscrutable(i) == 0) { |
17 i = 0x100000001; | 15 i = 0x100000001; |
18 } | 16 } |
19 i = 0xFFFFFFFFF & i; // In JS semantics [:i:] will be truncated to 32 bits. | 17 i = 0xFFFFFFFFF & i; // In JS semantics [:i:] will be truncated to 32 bits. |
20 i = 0x100000001 - i; | 18 i = 0x100000001 - i; |
21 return a[i]; | 19 return a[i]; |
22 } | 20 } |
23 | 21 |
24 main() { | 22 main() { |
25 Expect.throws(() => foo(), | 23 Expect.throws(() => foo(), |
26 (e) => e is RangeError); | 24 (e) => e is RangeError); |
27 } | 25 } |
OLD | NEW |