在Flutter Dart的另一个枚举映射中使用枚举映射属性值

enum Fruit {
  apple,
  banana,
  orange,
}

enum FruitColor {
  red,
  yellow,
  orange,
}

extension FruitColorExtension on FruitColor {
  Fruit get fruit {
    switch (this) {
      case FruitColor.red:
        return Fruit.apple;
      case FruitColor.yellow:
        return Fruit.banana;
      case FruitColor.orange:
        return Fruit.orange;
      default:
        throw Exception('Invalid FruitColor');
    }
  }
}

void main() {
  FruitColor fruitColor = FruitColor.red;
  Fruit fruit = fruitColor.fruit;
  print(fruit);  // 输出：Fruit.apple
}