Does `Flow.collect()` block the parent coroutine f...

# coroutines

[tjohnn]

Does Flow.collect() block the parent coroutine from executing the code under the flow until the flow is cancelled?

viewModelScope{
    // code here get executed
    someFlow.collect()
    // code here never executes
}

[diesieben07]

Yes, Flow terminal operators (like collect) suspend the calling coroutine while the flow is collected.

[tjohnn]

Ha.. okay thanks @diesieben07 and @Adam Powell

[Pablichjenkov]

Exactly, I would use the term suspend rather than block. If you take a look into the collect() signature you will see is marked as suspend.
You can launch a child coroutine and collect from there to avoid this behavior or use launchIn() combinator which do that for you..

[streetsofboston]

Note that the code under/after the collect is executed after the Flow ends (cancelled or ended/completed normally)

[Adam Powell]

cancellation generally means that collect throws CancellationException