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ps_promise/methods/
map.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<TO, F, Fut>(self, f: F) -> Promise<TO, E>
11    where
12        TO: Unpin + 'static,
13        F: FnOnce(T) -> Fut + Send + 'static,
14        Fut: Future<Output = TO> + Send + 'static,
15    {
16        Promise::new(async move {
17            match self.await {
18                Ok(value) => Ok(f(value).await),
19                Err(err) => Err(err),
20            }
21        })
22    }
23}