toon_formater 1.0.2

Token-Oriented Object Notation (TOON) – A compact, deterministic JSON format for LLM prompts (Dart implementation)

example/lib/main.dart

import 'package:flutter/material.dart';
import 'user_model.dart';

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

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'TOON Example',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: const MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key});

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  String _toonOutput = '';
  String _parsedName = '';

  @override
  void initState() {
    super.initState();
    _testToon();
  }

  void _testToon() {
    final user = User(
      name: 'Alice',
      age: 30,
      email: '[e-mail]',
    );

    // Convert to TOON format
    final toon = user.toToon();
    setState(() {
      _toonOutput = toon;
    });

    // Parse from TOON format
    final parsed = User.fromToon(toon);
    setState(() {
      _parsedName = parsed.name;
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('TOON Format Example'),
      ),
      body: Padding(
        padding: const EdgeInsets.all(16.0),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            const Text(
              'TOON Output:',
              style: TextStyle(fontSize: 18, fontWeight: FontWeight.bold),
            ),
            const SizedBox(height: 8),
            Container(
              padding: const EdgeInsets.all(12),
              decoration: BoxDecoration(
                color: Colors.grey[200],
                borderRadius: BorderRadius.circular(8),
              ),
              child: SelectableText(
                _toonOutput,
                style: const TextStyle(fontFamily: 'monospace'),
              ),
            ),
            const SizedBox(height: 24),
            const Text(
              'Parsed Name:',
              style: TextStyle(fontSize: 18, fontWeight: FontWeight.bold),
            ),
            const SizedBox(height: 8),
            Text(
              _parsedName,
              style: const TextStyle(fontSize: 16),
            ),
          ],
        ),
      ),
    );
  }
}