alt method

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

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

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

Implementation

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