Taylor Cramer

This isn't strictly an `impl Trait` proposal, but it interacts heavily with abstract return types. In particular, it'd be nice to be able to write `typeof(my_func)::Output` to refer to the...

Use docstrings as display impls where possible

2

I find myself writing a lot of code that looks like this: ```rust #[derive(Debug, Fail)] pub enum Error { // Case one occurred. #[fail(display = "Case one occurred.")] CaseOne, }...

Add future::pinned combinator

5

This is a preliminary attempt at a massively unsafe manual self-borrowing future to allow working with borrowing `futures` combinators without relying on `async`/`await`. I'm uncomfortable about the number of different...

Consider using `loom` for concurrency primitives

1

We've got a number of combinators that rely on tricky atomics. I think it might be a good idea to give [loom](https://github.com/tokio-rs/loom) a try.

Design and add AsyncBufWrite

1

https://www.reddit.com/r/rust/comments/gehh0q/notes_on_iouring/fpnhv04?utm_source=share&utm_medium=web2x has more context. cc @withoutboats @Nemo157

Either the README should document that libjack-dev must be installed, or the installation should be done automatically. If automatic installation is provided, it should probably be added to the the...

Readable includes hup, but writable doesn't

10

I've spent quite a while looking at this code and trying to understand it, but I'm failing. [`poll_read`](https://github.com/tokio-rs/tokio-core/blob/0868b97832277656c8f361b8aed43d4f373b804f/src/reactor/poll_evented.rs#L133) checks the bits included in [`read_ready`](https://github.com/tokio-rs/tokio-core/blob/master/src/reactor/mod.rs#L810), which includes `hup`. [`poll_write`](https://github.com/tokio-rs/tokio-core/blob/0868b97832277656c8f361b8aed43d4f373b804f/src/reactor/poll_evented.rs#L153), however, doesn't...

Deregister Eventeds before dropping

1

If https://github.com/carllerche/mio/issues/753 is implemented, then tokio-core will have to deregister `Evented`s rather than expecting them to be deregistered on `Drop`. However, I believe we can make this change now (backwards-compatibly).

Interval is Infallible

13

[`Interval::poll` never returns an error,](https://tokio-rs.github.io/tokio-core/src/tokio_core/reactor/interval.rs.html#71) but its associated error type is `io::Error`. The error type should be changed to `enum Never {}` or similar (eventually `!` when it lands).

Reclaiming Slab Memory

5

Currently, tokio-core uses the [`slab` crate](https://crates.io/crates/slab) to store timer [heaps](https://github.com/tokio-rs/tokio-core/blob/0868b97832277656c8f361b8aed43d4f373b804f/src/heap.rs#L22) and dispatch maps for [IO events and tasks](https://github.com/tokio-rs/tokio-core/blob/master/src/reactor/mod.rs#L69). However, the [slab crate currently offers no way to reclaim memory](https://github.com/carllerche/slab/issues/38). This...