[swift-users] Protocol composition results in EXC_BAD_ACCESS

[Rudolf Adamkovič]

> On 3 Apr 2017, at 16:48, Adrian Zubarev <adrian.zubarev at 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+

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