MainBlocState class abstract

A base class for all Bloc states in the application.

This abstract class serves as a foundation for creating specific state classes that can be used with Blocs. All custom state classes should extend this class.

The const constructor allows for efficient instantiation of state objects.

Example with regular class:

class MySpecificState extends MainBlocState {
  final String someData;

  const MySpecificState(this.someData);
}

// Using the state
emit(MySpecificState('Some data'));

Example with Freezed 3.0.0:

import 'package:freezed_annotation/freezed_annotation.dart';

part 'my_state.freezed.dart';

@freezed
sealed class MyState extends MainBlocState with _$MyState {
  const factory MyState.initial() = _Initial;
  const factory MyState.loading() = _Loading;
  const factory MyState.loaded(String data) = _Loaded;
}

// Using the state with pattern matching
final state = MyState.loaded('data');
final result = switch (state) {
  Initial() => 'Initial State',
  Loading() => 'Loading State',
  Loaded(:final data) => 'Loaded: $data',
};

Note: When using with Freezed 3.0.0+:

  1. Use sealed keyword for pattern matching with fixed number of subtypes
  2. Use abstract keyword if the class can be extended/implemented
  3. Extend MainBlocState instead of implementing it
  4. Use Dart's built-in pattern matching instead of .when/.map methods
Implementers

Constructors

MainBlocState()
const

Properties

hashCode → int
The hash code for this object.
no setterinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited

Methods

noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toString() → String
A string representation of this object.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited