Faultd.

I'm pretty new to Rust, so I should say that not too long ago I thought unwrap-ing everything was the norm. Of course, I would check for things with is_some, is_none, is_ok, is_err and then unwrap, because I'm not a psychopath, but in the end of the day, I would still unwrap everything.

Then I discovered that I can just use ? instead, and capture all the errors in one big generic enum. This is made especially easy using the thiserror crate, with what my code can now look like this:

#[derive(Error, Debug)]
pub enum Error {
    #[error("JSON error: {0}")]
    Json(#[from] serde_json::Error),
    #[error("HTTP error: {0}")]
    Http(#[from] reqwest::Error),
    #[error("URL error: {0}")]
    Url(#[from] url::ParseError),
}

fn main() -> Result<(), Error> {
    let url = Url::parse("https://example.com")?;
    let response = reqwest::get(url)?;
    let body = response.text()?;
    let json: Value = serde_json::from_str(&body)?;
    
    println!("{}", json);
    
    Ok(())
}

Much nicer, right? I think so. Thanks to thiserror I can still have custom error messages, but also I get to use ? instead of unwrap-ing everything, leaving my code a lot cleaner and nicer to read.