Failure return `value`

[AnthonyMDev]

Maybe I'm completely confused about the way this works, but shouldn't a failureClosure return Void? Currently, it's trying to return the Value type.

The README shows failure returning Void, which makes sense. Why is the failureClosure returning the value? If the task has failed, shouldn't there be no value?

I'm unable to use this, because, for the task I'm trying to create, if the task has failed, I can't return a value, since the value doesn't exist.

[inamiy]

failureClosure is used for not only handling the future-failed error, but also you can recover it by returning a new task (or value) inside the closure.

For example:

task1.success { ...
    // this closure is called on task1 success only
    return task2
}.failure { ...
    // this closure is called on task1 failure only
    return task3
}.then { ...
    // this closure is called on either task2 or task3 success or failure
}

If task1 fails, task3 will be created as a recovery task
and its completion will be handled inside consecutive thenClosure.

If you aren't interested in failure-recovery, you can just say "no recovery task"
by returning Void inside failureClosure, as README example is doing.

[AnthonyMDev]

That makes sense. Thank you!

Sent from my iPhone

On Jul 17, 2015, at 17:15, Yasuhiro Inami notifications@github.com wrote:

failureClosure is used for not only handling the future-failed error, but also you can recover it by returning a new task (or value) inside the closure.

For example:

task1.success { ...
// this closure is called on task1 success only
return task2
}.failure { ...
// this closure is called on task1 failure only
return task3
}.then { ...
// this closure is called on either task2 or task3 success or failure
}
If task1 fails, task3 will be created as a recovery task
and its completion will be handled inside consecutive thenClosure.

If you aren't interested in failure-recovery, you can just say "no recovery task"
by returning Void inside failureClosure, as README example is doing.

—
Reply to this email directly or view it on GitHub.

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