Freezedを使ってみる (Flutter)

$ flutter --version
Flutter 3.3.4 • channel stable • https://github.com/flutter/flutter.git
Framework • revision eb6d86ee27 (3 weeks ago) • 2022-10-04 22:31:45 -0700
Engine • revision c08d7d5efc
Tools • Dart 2.18.2 • DevTools 2.15.0

$ dart pub add freezed_annotation
$ dart pub add --dev build_runner
$ dart pub add --dev freezed

import 'package:freezed_annotation/freezed_annotation.dart';

part 'main.freezed.dart';

...

@freezed
class Human with _$Human {
  const factory Human({
    required String name,
    required int age,
  }) = _Human;
}

$ dart run build_runner build

import 'package:flutter/material.dart';
import 'package:hooks_riverpod/hooks_riverpod.dart';
import 'package:freezed_annotation/freezed_annotation.dart';

part 'main.freezed.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context, WidgetRef ref) {
    print(11111);
    var h = Human(name: 'human name', age: 30);
    print(h);
    return MaterialApp(
        home: Scaffold(
            appBar: AppBar(
              title: const Text('My First app'),
            ),
            body: null));
  }
}

@freezed
class Human with _$Human {
  const factory Human({
    required String name,
    required int age,
  }) = _Human;
}

I/flutter ( 5588): 11111
I/flutter ( 5588): Human(name: human name, age: 30)