This project aims to demonstrate simple implementation of Dart's extension type in handling different cases with flutter_bloc in a Flutter application. While traditionally packages like freezed have been used for state management, this project looks at how to do this using extension types. You should not use this directly in your own project. This was created for the example.
extension type const BaseState<T>._(({T value})? _) {
const factory BaseState.initial() = _Initial;
const factory BaseState.loading() = _Loading;
const factory BaseState.data(T value) = _Data<T>;
const factory BaseState.error() = _Error;
}
extension type const _Initial<T>._(Null _) implements BaseState<Never> {
const _Initial() : this._(null);
}
extension type const _Loading<T>._(Null _) implements BaseState<Never> {
const _Loading() : this._(null);
}
extension type const _Data<T>._(({T value}) _) implements BaseState<T> {
const _Data(T value) : this._((value: value));
T get value => _.value;
}
extension type const _Error<T>._(Null _) implements BaseState<Never> {
const _Error() : this._(null);
}
React
Typescript
Django
Laravel
Facebook
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Alibaba
D3
Tencent