Birleştirme

import 'dart:ffi';

abstract class MathService {
  int add(int a, int b);
}

typedef NativeAdd = Int32 Function(Int32 a, Int32 b);
typedef DartAdd = int Function(int a, int b);

class NativeMathService implements MathService {
  final String bindingName;
  NativeMathService(this.bindingName);
  @override
  int add(int a, int b) => a + b;
  String describe() => 'native: $bindingName';
}

class NativeBinding {
  final String name;
  const NativeBinding(this.name);
}

class BindingGenerator {
  String generate(String className) => '// generated binding for $className';
}

class MathRepository {
  final MathService service;
  MathRepository(this.service);
  int sum(int a, int b) => service.add(a, b);
}

class ServiceContainer {
  final Map<String, dynamic> _services = {};
  void register(String key, dynamic service) => _services[key] = service;
  T resolve<T>(String key) => _services[key] as T;
}

class MathApp {
  final MathRepository repository;
  final BindingGenerator generator;
  MathApp(this.repository, this.generator);
  void run() {
    print('app: ${repository.sum(7, 8)}');
    print(generator.generate('MathApp'));
  }
}

void main() {
  print('servis hazır');
  final svc = NativeMathService('native_add');
  print(svc.describe());
  print('sonuç: ${svc.add(2, 3)}');
  final gen = BindingGenerator();
  print(gen.generate('NativeMathService'));
  final container = ServiceContainer();
  container.register('math', NativeMathService('native_add'));
  final repo = MathRepository(container.resolve<NativeMathService>('math'));
  print('repo: ${repo.sum(4, 6)}');
  final app = MathApp(repo, gen);
  app.run();
}