async_std::Stream interracts badly with futures::select!

[matklad]

futures::select! requires that the streams selected over implement futures::FusedStream. There's a .fuse() method on futures::StreamExt which fuses any stream. The problem is, to use StreamExt::fuse on has to import this trait, and then the .next method collides between async_std::Stream and futures::StreamExt.

See also async-rs/a-chat#1 (comment)

[yoshuawuyts]

There's relevant discussion on join and select in #14.

[yoshuawuyts]

We now have async-macros which has stream::join that allows bypassing the problems futures_preview::select has.

The pattern is to define an enum of event kinds, and then map each individual stream to be a member of that enum. Then using async iteration + match the same semantics can be achieved as futures_preview::select.

Going to go ahead and close this!