Proposal: Task.Supervisor.async_stream_nolink to monitor created tasks same as Task.Supervisor.async_nolink

[Anastasiya Dyachenko]

Hi!

I propose to add monitoring of tasks, created in Task.Supervisor.async_stream_nolink, so it would work the same as Task.Supervisor.async_nolink for cases when it used in OTP behaviour. 

For now, there is no info in docs that there are no monitoring and handle_info would not call, cause docs say it works same as async_nolink. And I think it would be better to repeat that behaviour at async_stream_nolink, cause it is barely possible to monitor these tasks manually. At least it would be great to add info in docs that there are no monitoring and example how to add monitoring manually. Thanks!

How it works in async_nolink https://hexdocs.pm/elixir/Task.Supervisor.html#async_nolink/3

Docs for async_stream_nolink https://hexdocs.pm/elixir/Task.Supervisor.html#async_stream_nolink/4

[José Valim]

In async_stream there is a separate process that controls the stream, so there isn't much the parent process can do, even in terms of monitors. If you need monitors and control, then it is best to not use the stream. I will update the docs, thanks!

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