alt method

@override ReaderTaskEither<E, L, R> alt(covariant ReaderTaskEither<E, L, R> orElse())

When this ReaderTaskEither returns Right, then return the current ReaderTaskEither. Otherwise return the result of orElse.

Used to provide an alternative ReaderTaskEither in case the current one returns Left.

Implementation

@override
ReaderTaskEither<E, L, R> alt(
  covariant ReaderTaskEither<E, L, R> Function() orElse,
) =>
    ReaderTaskEither(
      (env) async => (await run(env)).match(
        (_) => orElse().run(env),
        right,
      ),
    );