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use crate::sink::{SinkExt, SinkMapErr};
use futures_core::stream::{FusedStream, Stream};
use futures_sink::Sink;
use pin_project_lite::pin_project;
pin_project! {
/// Sink for the [`sink_err_into`](super::SinkExt::sink_err_into) method.
#[derive(Debug)]
#[must_use = "sinks do nothing unless polled"]
pub struct SinkErrInto<Si: Sink<Item>, Item, E> {
#[pin]
sink: SinkMapErr<Si, fn(Si::Error) -> E>,
}
}
impl<Si, E, Item> SinkErrInto<Si, Item, E>
where
Si: Sink<Item>,
Si::Error: Into<E>,
{
pub(super) fn new(sink: Si) -> Self {
Self { sink: SinkExt::sink_map_err(sink, Into::into) }
}
delegate_access_inner!(sink, Si, (.));
}
impl<Si, Item, E> Sink<Item> for SinkErrInto<Si, Item, E>
where
Si: Sink<Item>,
Si::Error: Into<E>,
{
type Error = E;
delegate_sink!(sink, Item);
}
// Forwarding impl of Stream from the underlying sink
impl<S, Item, E> Stream for SinkErrInto<S, Item, E>
where
S: Sink<Item> + Stream,
S::Error: Into<E>,
{
type Item = S::Item;
delegate_stream!(sink);
}
impl<S, Item, E> FusedStream for SinkErrInto<S, Item, E>
where
S: Sink<Item> + FusedStream,
S::Error: Into<E>,
{
fn is_terminated(&self) -> bool {
self.sink.is_terminated()
}
}