| // Copyright (c) 2011, 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. |
| |
| /// @assertion The predefined Dart function identical() is defined such that |
| /// identical(c1, c2) iff: |
| /// . . . |
| /// • c1 and c2 are instances of double and one of the following holds: |
| /// – c1 and c2 are non-zero and c1 == c2. |
| /// – Both c1 and c2 are +0.0. |
| /// – Both c1 and c2 are −0.0. |
| /// – Both c1 and c2 represent a NaN value with the same underlying bit |
| /// pattern. |
| /// @description Checks that two non-zero and non-NaN doubles representing the |
| /// same value are identical. |
| /// @author kaigorodov |
| |
| import "../../../Utils/expect.dart"; |
| |
| mul(var d1, var d2) { |
| return d1 * d2; |
| } |
| |
| main() { |
| var d1 = 32000.5; |
| var d2 = 33000.5; |
| Expect.isTrue(identical(d1, d1)); |
| Expect.isTrue(identical(2.5, 2.5)); |
| Expect.isTrue(identical(2.5, 2.5-0.0)); |
| Expect.isTrue(identical(2.5, 5.0/2)); |
| Expect.isTrue(identical(1.5*2, 1.5*2)); |
| Expect.isTrue(identical(mul(d1, d2), mul(d1, d2))); |
| Expect.isTrue(identical(mul(d1, d2), mul(d2, d1))); |
| } |