tests/language/enum_syntax_test.dart

// Copyright (c) 2014, 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.

// Basic syntax test for enumeration types

import 'package:expect/expect.dart';


enum Color { red, orange, yellow, green }

// Additional comma at end of list is ok.
enum Veggies { carrot, bean, broccolo, }

// Need at least one enumeration identifier.
enum Nada {}  /// 01: compile-time error

// Duplicate entries are a compile-time error
enum ComeAgain { ahau, knust, zipfel, knust, gupf }  /// 02: compile-time error

// Enum entries must not collide with implicitly defined members.
enum ComeAgain { ahau, knust, zipfel, index } /// 03: compile-time error

enum ComeAgain { ahau, knust, zipfel, values } /// 04: compile-time error

enum ComeAgain { ahau, knust, zipfel, toString } /// 05: compile-time error

// Enum entry must not collide with enum type name.
enum ComeAgain { ahau, knust, zipfel, ComeAgain } /// 06: compile-time error

// Missing comma.
enum Numbers { one, two, three four, five }  /// 07: compile-time error

// Missing enum type name.
enum { eins, zwei, drei }  /// 08: compile-time error

// Duplicate name in library scope.
topLevelFunction() => null;
enum topLevelFunction { bla, blah }  /// 09: compile-time error

class C {}
enum C { bla, blah }  /// 10: compile-time error

var zzTop;
enum zzTop { Billy, Dusty, Frank }  /// 11: compile-time error

// Enum type cannot be super type or interface type.
class Rainbow extends Color {}  /// 20: compile-time error
class Rainbow implements Color {}  /// 21: compile-time error
class Rainbow extends List with Color {}  /// 22: compile-time error

main() {
  Nada x; /// 01: continued
  var x = ComeAgain.zipfel;  /// 02: continued
  var x = ComeAgain.zipfel;  /// 03: continued
  var x = ComeAgain.zipfel;  /// 04: continued
  var x = ComeAgain.zipfel;  /// 05: continued
  var x = ComeAgain.zipfel;  /// 06: continued
  var x = Numbers.four;  /// 07: continued
  var x = topLevelFunction.bla;  /// 09: continued
  var x = C.bla;  /// 10: continued
  var x = zzTop.Frank;  /// 11: continued

  var x = new Rainbow();  /// 20: continued
  var x = new Rainbow();  /// 21: continued
  var x = new Rainbow();  /// 22: continued

  // It is a compile-time error to explicitly instantiate an enum instance.
  var x = new Color();  /// 30: compile-time error
}