History

Nick Mathewson b60b0a266a Bump every crate's edition to 2021. This is an automated change made with a perl one-liner and verified with grep -L and grep -l. Some warnings are introduced with this change; they will be removed in subsequent commits. See arti#208 for older discussion on this issue.		2022-04-25 13:05:31 -04:00
..
src	retry-error: Handle integer overflow	2022-04-23 13:32:27 +00:00
Cargo.toml	Bump every crate's edition to 2021.	2022-04-25 13:05:31 -04:00
README.md	Example needs to be the same as the readme	2021-11-30 09:09:42 -05:00

README.md

retry-error

An error attempt to represent multiple failures.

This crate implements [RetryError], a type to use when you retry something a few times, and all those attempts. Instead of returning only a single error, it records all of the errors received, in case they are different.

This crate is developed as part of Arti, a project to implement Tor in Rust. It's used by higher-level crates that retry operations.

Example

use retry_error::RetryError;

fn some_operation() -> anyhow::Result<bool> {
   unimplemented!(); // example
}

fn example() -> Result<(), RetryError<anyhow::Error>> {
   const N_ATTEMPTS: usize = 10;
   let mut err = RetryError::in_attempt_to("perform an example operation");
   for _ in 0..N_ATTEMPTS {
       match some_operation() {
           Ok(val) => return Ok(()),
           Err(e) => err.push(e),
       }
   }
   // All attempts failed; return all the errors.
   return Err(err);
}

License: MIT OR Apache-2.0