Trait radicle_std_ext::result::ResultExt

pub trait ResultExt<T, E> {
    fn or_matches<E2, P, F>(self, pred: P, f: F) -> Result<T, E2>
    where
        E2: From<E>,
        P: FnOnce(&E) -> bool,
        F: FnOnce() -> Result<T, E2>;
}

Required Methods

fn or_matches<E2, P, F>(self, pred: P, f: F) -> Result<T, E2>where
    E2: From<E>,
    P: FnOnce(&E) -> bool,
    F: FnOnce() -> Result<T, E2>,

Calls f if the result is Err, and the predicate pred on the error value returns true. Otherwise returns the Ok value of self. Note that f may change the error type, so as long as the target type can be converted from the original one.

Examples

use std::io;
use radicle_std_ext::result::ResultExt as _;

let res = Err(io::Error::new(io::ErrorKind::Other, "crashbug"))
    .or_matches::<io::Error, _, _>(|e| matches!(e.kind(), io::ErrorKind::Other), || Ok(()))
    .unwrap();

assert_eq!((), res)

Implementations on Foreign Types

impl<T, E> ResultExt<T, E> for Result<T, E>

fn or_matches<E2, P, F>(self, pred: P, f: F) -> Result<T, E2>where
    E2: From<E>,
    P: FnOnce(&E) -> bool,
    F: FnOnce() -> Result<T, E2>,

Implementors