| // Copyright (c) 2022, 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. |
| |
| // part of "core_patch.dart"; |
| |
| // Access hidden identity hash code field |
| external int _getHash(Object obj); |
| external void _setHash(Object obj, int hash); |
| |
| @patch |
| class Object { |
| @patch |
| external bool operator ==(Object other); |
| |
| // Random number generator used to generate identity hash codes. |
| static final _hashCodeRnd = new Random(); |
| |
| static int _objectHashCode(Object obj) { |
| var result = _getHash(obj); |
| if (result == 0) { |
| // We want the hash to be a Smi value greater than 0. |
| do { |
| result = _hashCodeRnd.nextInt(0x40000000); |
| } while (result == 0); |
| |
| _setHash(obj, result); |
| return result; |
| } |
| return result; |
| } |
| |
| @patch |
| int get hashCode => _objectHashCode(this); |
| int get _identityHashCode => _objectHashCode(this); |
| |
| @patch |
| String toString() => _toString(this); |
| // A statically dispatched version of Object.toString. |
| static String _toString(obj) => "Instance of '${obj.runtimeType}'"; |
| |
| @patch |
| dynamic noSuchMethod(Invocation invocation) { |
| throw new NoSuchMethodError.withInvocation(this, invocation); |
| } |
| |
| @patch |
| external Type get runtimeType; |
| } |