LanguageFeatures/Enhanced-Enum/grammar_A03_t02.dart

// Copyright (c) 2021, 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 We propose the following to also be allowed:
///
/// enum Name<T> with Mixin1, Mixin2 implements Interface1, Interface2 {
///   id1<int>(args1), id2<String>(args2), id3<bool>(args3);
///   memberDeclaration*
///   const Name(params) : initList;
/// }
/// where memberDeclaration* is any sequence of static and instance member
/// declarations and/or an unnamed generative const constructor declaration.
/// ...
/// The superclass of the mixin applications is the Enum class (which has an
/// abstract index getter, so the only valid super invocations are those valid
/// on Object).
///
/// @description Check that enum can implement interfaces
/// @author sgrekhov@unipro.ru

// SharedOptions=--enable-experiment=enhanced-enums

import "../../Utils/expect.dart";

class I1 {
  int interfaceMethod1() => 0;
  int get interfaceGetter1 => 0;
  void set interfaceSetter1(int value) {}
}

abstract class I2 {
  int interfaceMethod2();
  int get interfaceGetter2;
  void set interfaceSetter2(int value);
}

enum E implements I1, I2 {
  e1,
  e2,
  e3;

  int interfaceMethod1() => 42;
  int get interfaceGetter1 => 42;
  void set interfaceSetter1(int value) {}
  int interfaceMethod2() => 42;
  int get interfaceGetter2 => 42;
  void set interfaceSetter2(int value) {}
}

main() {
  Expect.equals(42, E.e1.interfaceMethod1());
  Expect.equals(42, E.e2.interfaceGetter1);
  E.e3.interfaceSetter1 = 42;
  Expect.equals(42, E.e3.interfaceMethod2());
  Expect.equals(42, E.e2.interfaceGetter2);
  E.e1.interfaceSetter2 = 42;
}