primal-lantern-1698

readme.md

primal-lantern-1698

Created with <3 with dartpad.dev.

main.dart

class ServiceManager {
  final _instances = <Type, Object>{};
  
  void register<T extends Object>(T instance) {
    _instances[T] = instance;
  }
  
  bool isRegistered<T extends Object>() {
    return isRegisteredByType(T);
  }
  
  bool isRegisteredByType(Type type) {
    return _instances.containsKey(type);
  }
}

final types = <Type>[
  String,
  int,
];

void main() {
  final sm = ServiceManager();
  sm.register('hello');
  for (final type in types) {
    print('$type: ${sm.isRegisteredByType(type)}');
  }
}