【Flutter/Dart】変数の型について

各変数の型が何になるか確認した時のメモです。

void main() {
  print('---var---');
  var nameVar = 'Bob';
  print(nameVar.runtimeType);
  print(nameVar);
  print('');
  print('---Object---');
  Object nameObj = 'Bob';
  print(nameObj.runtimeType);
  print(nameObj);
  print('');
  print('---String---');
  String nameStr = 'Bob';
  print(nameStr.runtimeType);
  print(nameStr);
  print('');
  print('---Map---');
  Map mapDyn = {
    1: 0,
    2: 1,
    '3': '2',
  };
  print(mapDyn.runtimeType);
  print(mapDyn[2]);
  print('');
  print('--- Map<String, int>---');
  Map<String, int> mapSta = {
    '1': 0,
    '2': 1,
    '3': 2,
  };
  print(mapSta.runtimeType);
  print(mapSta['2']);
  print('');
  print('---enum PlanetType.values---');
  print(PlanetType.values.runtimeType);
  print(PlanetType.values);
  print('');
  print('---enum PlanetType.terrestrial---');
  print(PlanetType.terrestrial.runtimeType);
  print(PlanetType.terrestrial);
  print(PlanetType.terrestrial.name);
  print(PlanetType.terrestrial.index);
  print('');
  print('---enum PlanetType.values[0]---');
  print(PlanetType.values[0].runtimeType);
  print(PlanetType.values[0]);
  print(PlanetType.values[0].name);
  print(PlanetType.values[0].index);
  print('');
  print('---enum Planet.values---');
  print(Planet.values.runtimeType);
  print(Planet.values);
  print('');
  print('---enum Planet.mercury---');
  print(Planet.mercury.runtimeType);
  print(Planet.mercury);
  print('');
  print('---enum Planet.mercury.planetType---');
  print(Planet.mercury.planetType.runtimeType);
  print(Planet.mercury.planetType);
}

enum PlanetType { terrestrial, gas, ice }

enum Planet {
  mercury(planetType: PlanetType.terrestrial, moons: 0, hasRings: false),
  venus(planetType: PlanetType.terrestrial, moons: 0, hasRings: false),
  // ···
  uranus(planetType: PlanetType.ice, moons: 27, hasRings: true),
  neptune(planetType: PlanetType.ice, moons: 14, hasRings: true);

  /// 定数生成コンストラクター
  const Planet(
      {required this.planetType, required this.moons, required this.hasRings});

  /// すべてのインスタンス変数はfinal変数です
  final PlanetType planetType;
  final int moons;
  final bool hasRings;

  /// 強化された列挙型はゲッターやその他のメソッドをサポートします
  bool get isGiant =>
      planetType == PlanetType.gas || planetType == PlanetType.ice;
}