Please include an example of retrying something other than a function taking no parameters

[sp1ff]

I have an async operation that I'd like to retry that requires input parameters. Async closures are unstable, and an async block returns a dyn Future, not an FnMut(). Implementing Action directly is difficult because I have to name the type implementing Future returned by my method. Is it possible to use this crate on stable if my operation requires parameters? If so, how?

[awnion]

Something like this should work:

use tokio_retry::Retry;
use tokio_retry::strategy::{ExponentialBackoff, jitter};

async fn action(url: &str) -> Result<u64, ()> {
    // do some real-world stuff here...
    Err(())
}

#[tokio::main]
async fn main() -> Result<(), ()> {
    let retry_strategy = ExponentialBackoff::from_millis(10)
        .map(jitter) // add jitter to delays
        .take(3);    // limit to 3 retries
    let url = "http://example.com";

    let result = Retry::spawn(retry_strategy, || action(&url) ).await?;

    Ok(())
}