use anyhow::Result;
use backon::ExponentialBuilder;
use backon::Retryable;
async fn fetch() -> Result<String> {
    Ok("hello, world!".to_string())
}
#[tokio::main]
async fn main() -> Result<()> {
    let content = fetch
        // Retry with exponential backoff
        .retry(ExponentialBuilder::default())
        // Sleep implementation, required if no feature has been enabled
        .sleep(tokio::time::sleep)
        // When to retry
        .when(|e| e.to_string() == "EOF")
        // Notify when retrying
        .notify(|err: &anyhow::Error, dur: Duration| {
            println!("retrying {:?} after {:?}", err, dur);
        })
        .await?;
    println!("fetch succeeded: {}", content);
    Ok(())
}

use anyhow::Result;
use backon::BlockingRetryable;
use backon::ExponentialBuilder;
fn fetch() -> Result<String> {
    Ok("hello, world!".to_string())
}
fn main() -> Result<()> {
    let content = fetch
        // Retry with exponential backoff
        .retry(ExponentialBuilder::default())
        // Sleep implementation, required if no feature has been enabled
        .sleep(std::thread::sleep)
        // When to retry
        .when(|e| e.to_string() == "EOF")
        // Notify when retrying
        .notify(|err: &anyhow::Error, dur: Duration| {
            println!("retrying {:?} after {:?}", err, dur);
        })
        .call()?;
    println!("fetch succeeded: {}", content);
    Ok(())
}