What are the best practices for using async in Rust?

What are the best practices for using async in Rust?

When using async in Rust, it's important to follow best practices like avoiding blocking calls, using the right async runtime, and managing lifetimes properly.

Can you give me an example of a simple async function?

Sure! Here's a simple async function that fetches data from a URL:

use reqwest;

async fn fetch_data(url: &str) -> Result<String, reqwest::Error> {
    let response = reqwest::get(url).await?;
    let body = response.text().await?;
    Ok(body)
}

What async runtime do you recommend for Rust?

I recommend using Tokio or async-std as they are the most popular async runtimes in Rust, each with its own strengths.

How do I handle errors in async functions?

You can handle errors in async functions using the Result type, just like in synchronous functions. Use ? to propagate errors.