Rust Programming Cookbook

How it works...

Futures (often called promises) are typically fully integrated into the language and come with a built-in runtime. In Rust, the team chose a more ambitious approach and left the runtime open for the community to implement (for now). Right now the two projects Tokio and Romio (https://github.com/withoutboats/romio) and juliex (https://github.com/withoutboats/juliex) have the most sophisticated support for these futures. With the recent addition of async/await in the Rust syntax in the 2018 edition, it's only a matter of time until the various implementations mature.

After setting up the dependencies in step 1, step 2 shows that we don't have to enable the async and await macros/syntax to use them in the code—this was a requirement ...