Prerequisites

• futures-rs version 0.1.17
• rustc 2018-04-29 nightly

Familiarity with some advanced Rust concepts will be helpful too.

• Iterators: They're often pretty similar to futures in implementation
• Borrow checker: Moving into closures and lifetimes
• Traits, associated types, trait objects, and impl Trait

The Rust book 2.0 is a good resource.

Also, watch Alex Crichton's talk from 2016 on the high-level idea for futures. It's still very current.

Format

Inside src/bin there's exercise files exercise1.rs, exercise2.rs, and so on. Each has instructions at the top with suggested code to read under src/ and functions to complete inline. If you ever get stuck, there's always a correponding solutions?.rs file in the same directory.

Recall that you can run a binary directly with cargo:

$ cargo run --release --bin exercise1 -- <args>

TODO

• Exercise 4: Building a semaphore with "shared memory"
• Exercise 5: Map async/await to combinators
• Exercise 6: Implement explicit and_then state machine
• Exercise 7: Implement oneshot with task wakeups
• Performance tuning with Cyclotron
• Write high level goals here

Appendix

• https://aturon.github.io/apr/async-in-rust/chapter.html
• https://tokio.rs/docs/getting-started/futures/
• http://aturon.github.io/2018/02/27/futures-0-2-RC/