按索引递增枚举或设置枚举值

Question

我有一个枚举类型：

enum Day {sunday, monday, tuesday...}

和一个变量：

Day day = Day.sunday;

我希望能够增加这一天。像这样的东西：

day++; // this would be wonderful
day = Day.getByIndex(day.index + 1); // something like this can also work

但我找不到这样的东西。是全天使用开关的唯一选择吗？

Answer 1

DartPad 示例

enum Day {sunday, monday, tuesday}
void main() {
    var day = Day.sunday;
  print(day);
  print(Day.values[day.index + 1]);
}

众所周知，Dart 枚举功能不是很强大。我想他们最终会进行一些大修。