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| 1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file | 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 | 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 /** | 5 /** |
| 6 * This part contains helpers for supporting runtime type information. | 6 * This part contains helpers for supporting runtime type information. |
| 7 * | 7 * |
| 8 * The helper use a mixture of Dart and JavaScript objects. To indicate which is | 8 * The helper use a mixture of Dart and JavaScript objects. To indicate which is |
| 9 * used where we adopt the scheme of using explicit type annotation for Dart | 9 * used where we adopt the scheme of using explicit type annotation for Dart |
| 10 * objects and 'var' or omitted return type for JavaScript objects. | 10 * objects and 'var' or omitted return type for JavaScript objects. |
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| 697 * and [t] are Dart values. | 697 * and [t] are Dart values. |
| 698 */ | 698 */ |
| 699 bool isIdentical(var s, var t) => JS('bool', '# === #', s, t); | 699 bool isIdentical(var s, var t) => JS('bool', '# === #', s, t); |
| 700 | 700 |
| 701 /** | 701 /** |
| 702 * Returns [:true:] if the JavaScript values [s] and [t] are not identical. We | 702 * Returns [:true:] if the JavaScript values [s] and [t] are not identical. We |
| 703 * use this helper to avoid generating code under the invalid assumption that | 703 * use this helper to avoid generating code under the invalid assumption that |
| 704 * [s] and [t] are Dart values. | 704 * [s] and [t] are Dart values. |
| 705 */ | 705 */ |
| 706 bool isNotIdentical(var s, var t) => JS('bool', '# !== #', s, t); | 706 bool isNotIdentical(var s, var t) => JS('bool', '# !== #', s, t); |
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