| // 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. |
| |
| /// @assertion A record object has a primitive == operator if all of its field |
| /// have primitive == operators. |
| /// |
| /// Note that this is a dynamic property of a record object, not a property of |
| /// its static type. Since primitive equality only comes into play in constants, |
| /// the compiler can see the actual field values for a relevant record at |
| /// compile time because it has the actual constant record value with all of its |
| /// constant fields. This means a record can be used in a constant set or as a |
| /// constant map key, but only when its field values could be as well. |
| /// |
| /// @description Checks that if all of the record fields have a primitive == |
| /// operator then this record can be used in a constant map literal as a key |
| /// @author sgrekhov22@gmail.com |
| |
| import "../../Utils/expect.dart"; |
| |
| class C { |
| const C(); |
| } |
| |
| main() { |
| const m1 = {const (1, "2", String, C(), Object(), Symbol('foo')): 1}; |
| const m2 = { |
| (1, "2", String, const C(), const Object(), const Symbol('foo')): 1}; |
| const m3 = { |
| const (one: 1, two: "2", three: String, four: C(), five: Object(), |
| six: Symbol('foo')): 2 |
| }; |
| const m4 = { |
| (one: 1, two: "2", three: String, four: const C(), five: const Object(), |
| six: const Symbol('foo')): 2 |
| }; |
| const m5 = { |
| const (1, two: "2", String, four: C(), five: Object(), Symbol('foo')): 3 |
| }; |
| const m6 = { |
| (1, two: "2", String, four: const C(), five: const Object(), |
| const Symbol('foo')): 3 |
| }; |
| |
| Expect.equals(m1, m2); |
| Expect.equals(m3, m4); |
| Expect.equals(m5, m6); |
| } |