alt method

@override TaskOption<R> alt(covariant TaskOption<R> orElse())

When this TaskOption returns Some, then return the current TaskOption. Otherwise return the result of orElse.

Used to provide an alternative TaskOption in case the current one returns None.

Implementation

@override
TaskOption<R> alt(covariant TaskOption<R> Function() orElse) =>
    TaskOption(() async => (await run()).match(
          () => orElse().run(),
          some,
        ));