Hey, how about to add a code generator to avoid the huge amount of boiler plate ?

Hi,

With the last flutter upgrade the package is failing
Do you intent to maintain this package or it is not in your plans anymore ?

Thanks

Hi! I'm using this package and when writing tests, I often get failed messages like:

<instance of MySealedUnion> does not match <instance of MySealedUnion>

which makes it a little difficult to debug. My proposed solution is an override of the toString method for every union that looks like the following:

class Union4Impl<A, B, C, D> {
  @override
  String toString() => "$union4Impl:${join((a) => a.toString(), (b) => b.toString(), (c) => c.toString(), (d) => a.toString())}";

all the information still stays: this is a union 4 impl, but we pass down the toString to the actual class that is there.

let me know if we're open to a PR :)

I know this is particular to flutter, but maybe it makes sense to you too.
Currently, we are able to call .join to listen all states, but sometimes we need a special handling for just one or two states.
For instance the code below. I had to use multiple empty closures to listen to the error state and be able to show a SnackBar. Sadly, in flutter, we can't just return a SnackBar to the view tree. The same for Alerts and to navigation.

I see two options here. to create siblings methods to .join to allow filtering of the current state or to expose the current state type being emitted. I know this library is meant to allow a centralized state management, but it looks like that it is not always possible in Flutter.

body: BlocListener<LoginBloc, LoginState>(
            listener: (context, state) {
              state.join((_) {}, (_) {}, (_) {}, (error) {
                _scaffoldKey.currentState.showSnackBar(
                  SnackBar(
                    content: Text('Fuuuuuuuuuuuu $error'),
                  ),
                );
              });
            },
            child: BlocBuilder<LoginBloc, LoginState>(
              builder: (context, state) {
                return Stack(
                  children: <Widget>[
                    _buildLoginForm(),
                    state.join(
                        (initial) => Container(),
                        (loading) => Positioned.fill(
                            child: Center(child: CircularProgressIndicator())),
                        (logged) => Container(),
                        (error) => Container()),
                  ],
                );
              },
            ),
          )

Am I missing something? Is there any other way to handle this?
Thanks.

cc: @felangel , maybe you have some input to this.

Edit: Simplified code.