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macro_rules! encoder {
($(#[$attr:meta])* $name:ident<$inner:ident> $({ $($constructor:tt)* })*) => {
$(#[$attr])*
#[pin_project::pin_project]
#[derive(Debug)]
///
/// This structure implements a [`Stream`](futures_core::stream::Stream) interface and will read
/// uncompressed data from an underlying stream and emit a stream of compressed data.
pub struct $name<$inner: futures_core::stream::Stream<Item = std::io::Result<bytes::Bytes>>> {
#[pin]
inner: crate::stream::Encoder<$inner, crate::codec::$name>,
}
impl<$inner: futures_core::stream::Stream<Item = std::io::Result<bytes::Bytes>>> $name<$inner> {
$(
/// Creates a new encoder which will read uncompressed data from the given stream
/// and emit a compressed stream.
///
$($constructor)*
)*
/// Acquires a reference to the underlying stream that this encoder is wrapping.
pub fn get_ref(&self) -> &$inner {
self.inner.get_ref()
}
/// Acquires a mutable reference to the underlying stream that this encoder is
/// wrapping.
///
/// Note that care must be taken to avoid tampering with the state of the stream which
/// may otherwise confuse this encoder.
pub fn get_mut(&mut self) -> &mut $inner {
self.inner.get_mut()
}
/// Acquires a pinned mutable reference to the underlying stream that this encoder is
/// wrapping.
///
/// Note that care must be taken to avoid tampering with the state of the stream which
/// may otherwise confuse this encoder.
pub fn get_pin_mut(self: std::pin::Pin<&mut Self>) -> std::pin::Pin<&mut $inner> {
self.project().inner.get_pin_mut()
}
/// Consumes this encoder returning the underlying stream.
///
/// Note that this may discard internal state of this encoder, so care should be taken
/// to avoid losing resources when this is called.
pub fn into_inner(self) -> $inner {
self.inner.into_inner()
}
}
impl<$inner: futures_core::stream::Stream<Item = std::io::Result<bytes::Bytes>>>
futures_core::stream::Stream for $name<$inner>
{
type Item = std::io::Result<bytes::Bytes>;
fn poll_next(
self: std::pin::Pin<&mut Self>,
cx: &mut std::task::Context<'_>,
) -> std::task::Poll<Option<std::io::Result<bytes::Bytes>>> {
self.project().inner.poll_next(cx)
}
}
const _: () = {
fn _assert() {
use std::{pin::Pin, io::Result};
use bytes::Bytes;
use futures_core::stream::Stream;
use crate::util::{_assert_send, _assert_sync};
_assert_send::<$name<Pin<Box<dyn Stream<Item = Result<Bytes>> + Send>>>>();
_assert_sync::<$name<Pin<Box<dyn Stream<Item = Result<Bytes>> + Sync>>>>();
}
};
}
}