ps_promise/methods/
map_err.rs

1use std::future::Future;
2
3use crate::{Promise, PromiseRejection};
4
5impl<T, E> Promise<T, E>
6where
7    T: Send + Unpin + 'static,
8    E: PromiseRejection,
9{
10    pub fn map_err<EO, F, Fut>(self, f: F) -> Promise<T, EO>
11    where
12        EO: PromiseRejection + 'static,
13        F: FnOnce(E) -> Fut + Send + 'static,
14        Fut: Future<Output = EO> + Send + 'static,
15    {
16        Promise::new(async move {
17            match self.await {
18                Ok(value) => Ok(value),
19                Err(err) => Err(f(err).await),
20            }
21        })
22    }
23}

ps_promise/methods/map_err.rs

ps_promise/methods/
map_err.rs