How do I handle errors in Rust async functions?

How do I handle errors in Rust async functions?

In Rust, you can handle errors in async functions using the Result type. You can use the ? operator to propagate errors.

Can you show me an example of using Result in an async function?

Sure! Here's a simple example:

async fn fetch_data() -> Result<String, Box<dyn std::error::Error>> {
    let response = reqwest::get("https://api.example.com/data").await?;
    let body = response.text().await?;
    Ok(body)
}

What if I want to handle the error differently instead of propagating it?

You can use a match statement to handle errors differently. For example:

async fn fetch_data() {
    match reqwest::get("https://api.example.com/data").await {
        Ok(response) => { /* handle success */ },
        Err(e) => { /* handle error */ println!("Error: {}", e); },
    }
}