열거형
열거형 사용
enum Color { red, green, blue }
enum Color {
red,
green,
blue,
}assert(Color.red.index == 0);
assert(Color.green.index == 1);
assert(Color.blue.index == 2);List<Color> colors = Color.values;
assert(colors[2] == Color.blue);열거형 확장
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