Asynchronous Programming

Unlike Java, Rust supports the asynchronous programming model. There are different async runtimes for Rust, the most popular being Tokio. The other options are async-std and smol.

Here's a simple example of how to define an asynchronous function in Rust. The example relies on async-std for the implementation of sleep:

use std::time::Duration;
use async_std::task::sleep;

async fn format_delayed(message: &str) -> String {
    sleep(Duration::from_secs(1)).await;
    format!("Message: {}", message)
}

Note: The Rust async keyword transforms a block of code into a state machine that implements the Future trait. This allows for writing asynchronous code sequentially.

See also:

• Asynchronous programming in Rust