FR: tokio::stream::extend

[elbaro]

let mut a = Vec::new();
let b = get_stream();
tokio::stream::extend(&mut a, b).await;

[carllerche]

I'm going to close this due to inactivity and a lack of detail.

If this feature is still needed, I would recommend writing a more detailed proposal such that a contributor is able to understand the requirements and provide a PR.

[elbaro]

#3010 is waiting for review.

tokio::stream::extend is a handy function for a case where you want Vec::extend(items) but items are prepared asynchronously. The interface would be Vec::extend_with_stream(..) or tokio::stream::extend. async-std has this one. I found myself using this pattern a lot to make a sync point and collect the results, but I don't know this is a common pattern for others.