when using `produce{}` for a finite sequence of it...

# coroutines

[Mark]

when using produce{} for a finite sequence of items, the docs say to call SendChannel.close() to indicate no more items will be sent. But isn’t the common case for no more items to be sent once produce lambda has completed naturally? In which case, why is SendChannel.close() not done automatically?

[Vsevolod Tolstopyatov [JB]]

It is done automatically:

The channel is [closed][SendChannel.close] when the coroutine completes.

[Mark]

ok thanks

[Mark]

Yes, now I see the ProducerCoroutine.onCompletionInternal() implementation enforces this.

[Vsevolod Tolstopyatov [JB]]

it’s better not to make any conclusions from internal implementation 🙂
All public contracts are usually established in KDoc, unspecified details may change in any release

[Mark]

Yes, of course, although I find it very informative to see how that is implemented, so it’s beneficial to inspect these things 🙂