amadeus_core/pipe/
map.rs

1use derive_new::new;
2use futures::Stream;
3use pin_project::pin_project;
4use serde_closure::traits::FnMut;
5use std::{
6	pin::Pin, task::{Context, Poll}
7};
8
9use super::Pipe;
10
11#[pin_project]
12#[derive(new)]
13pub struct Map<P, F> {
14	#[pin]
15	pipe: P,
16	f: F,
17}
18
19impl<P: Stream, F> Stream for Map<P, F>
20where
21	F: FnMut<(P::Item,)>,
22{
23	type Item = F::Output;
24
25	#[inline]
26	fn poll_next(self: Pin<&mut Self>, cx: &mut Context) -> Poll<Option<Self::Item>> {
27		let mut self_ = self.project();
28		let (mut pipe, f) = (self_.pipe, &mut self_.f);
29		pipe.as_mut()
30			.poll_next(cx)
31			.map(|t| t.map(|t| f.call_mut((t,))))
32	}
33}
34
35impl<P: Pipe<Input>, F, Input> Pipe<Input> for Map<P, F>
36where
37	F: FnMut<(P::Output,)>,
38{
39	type Output = F::Output;
40
41	#[inline]
42	fn poll_next(
43		self: Pin<&mut Self>, cx: &mut Context, mut stream: Pin<&mut impl Stream<Item = Input>>,
44	) -> Poll<Option<Self::Output>> {
45		let mut self_ = self.project();
46		let (mut pipe, f) = (self_.pipe, &mut self_.f);
47		pipe.as_mut()
48			.poll_next(cx, stream.as_mut())
49			.map(|t| t.map(|t| f.call_mut((t,))))
50	}
51}
amadeus_core/pipe/map.rs

amadeus_core/pipe/
map.rs
