What are some examples of using async/await in Rust?

Can you give me some examples of using async/await in Rust?

Sure! In Rust, async/await is used for writing asynchronous code. Here's a simple example:

use std::time::Duration;
use tokio::time::sleep;

async fn async_function() {
    println!("Starting async function...");
    sleep(Duration::from_secs(2)).await;
    println!("Async function completed!");
}

#[tokio::main]
async fn main() {
    async_function().await;
}

What does the await keyword do in this context?

The await keyword tells the Rust compiler to pause the execution of the async function until the awaited future is ready. It allows other tasks to run in the meantime.

Can you explain how to handle errors in async functions?

Certainly! You can use the Result type to handle errors in async functions. Here's an example:

async fn might_fail() -> Result<(), String> {
    // Simulate an error
    Err(String::from("An error occurred"))
}

#[tokio::main]
async fn main() {
    match might_fail().await {
        Ok(_) => println!("Success!"),
        Err(e) => println!("Error: {}", e),
    }
}