| // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| import "package:expect/expect.dart"; |
| |
| foo(state) { |
| if (state == null) return 0; |
| var sum = 0; |
| for (int i = 0; i < state.length; i++) { |
| sum += state[i]; |
| } |
| state = inscrutableId(state); |
| for (int i = 0; i < state.length; i++) { |
| sum += state[i]; |
| } |
| return sum; |
| } |
| |
| int inscrutable(int x) => x == 0 ? 0 : x | inscrutable(x & (x - 1)); |
| |
| inscrutableId(x) { |
| if (x == 0) return inscrutable(x); |
| return (3 == inscrutable(3)) ? x : false; |
| } |
| |
| class A { |
| int length = 3; |
| operator [](i) => 1; |
| } |
| |
| main() { |
| Expect.equals(12, foo([1, 2, 3])); |
| if (inscrutableId(0) == 0) { |
| Expect.equals(6, foo(new A())); |
| } |
| } |