| // 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 The semantics of such an enum declaration, E, is defined as |
| /// introducing a (semantic) class, C, just like a similar class declaration. |
| /// ... |
| /// Enum values: For each <enumEntry> with name id and index i in the |
| /// comma-separated list of enum entries, a constant value is created, and a |
| /// static constant variable named id is created in C with that value. All the |
| /// constant values are associated, in some implementation dependent way, with |
| /// |
| /// their name id as a string "id", |
| /// |
| /// their index i as an int, and |
| /// their enum class’s name as a string, "Name", |
| /// all of which is accessible to the toString and index member of Enum, and to |
| /// the EnumName.name extension getter. The values are computed as follows. |
| /// |
| /// id ↦ Name() (no arguments, equivalent to empty argument list) |
| /// id(args) ↦ Name(args) |
| /// id<types>(args) ↦ Name<types>(args) |
| /// id.named(args) ↦ Name._$named(args) |
| /// id<types>.named(args) ↦ Name<types>._$named(args) |
| /// where args are considered as occurring in a const context, and it’s a |
| /// compile-time error if they are then not compile-time constants. |
| /// |
| /// @description Check enum's values name and index. |
| /// @author sgrekhov@unipro.ru |
| |
| // SharedOptions=--enable-experiment=enhanced-enums |
| |
| import "../../Utils/expect.dart"; |
| |
| enum E1<T1 extends num, T2> { |
| e1<int, String>(1, "1"), |
| e2<int, int>(2, 3); |
| |
| const E1(this.t1, this.t2); |
| |
| final T1 t1; |
| final T2 t2; |
| } |
| |
| main() { |
| Expect.equals(1, E1.e1.t1); |
| Expect.equals("1", E1.e1.t2); |
| Expect.equals(2, E1.e2.t1); |
| Expect.equals(3, E1.e2.t2); |
| |
| Expect.equals(0, E1.e1.index); |
| Expect.equals(1, E1.e2.index); |
| Expect.equals("e1", EnumName(E1.e1).name); |
| Expect.equals("e2", EnumName(E1.e2).name); |
| } |