Because it’s a value and has no identity. R+
> On 3 Apr 2017, at 17:58, Zhao Xin <owe...@gmail.com> wrote: > > Why not making State as a class? EffectiveState should be subclass of State. > > Zhaoxin > > On Mon, Apr 3, 2017 at 11:08 PM, Rudolf Adamkovič via swift-users > <swift-users@swift.org <mailto:swift-users@swift.org>> wrote: >> On 3 Apr 2017, at 16:48, Adrian Zubarev <adrian.zuba...@devandartist.com >> <mailto:adrian.zuba...@devandartist.com>> wrote: >> >> Why do you cast against an existential in first place? > > To avoid force-unwrap at the end here: > > class Store { > > var state: State > > // ... > > func processScheduledActions() { > > guard var effectfulState = state as? Effectful else { > return > } > > while let actions = effectfulState.scheduledActions.flush() { > for action in actions { > delegate?.store(self, didRequest: action) > } > } > > state = effectfulState as! State > > } > > } > > Thank you! > > R+ > > > _______________________________________________ > swift-users mailing list > swift-users@swift.org <mailto:swift-users@swift.org> > https://lists.swift.org/mailman/listinfo/swift-users > <https://lists.swift.org/mailman/listinfo/swift-users> > >
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