| use crate::Stream; |
| use pin_project_lite::pin_project; |
| use std::io; |
| use std::pin::Pin; |
| use std::task::{Context, Poll}; |
| use tokio::io::{AsyncBufRead, Lines}; |
| |
| pin_project! { |
| /// A wrapper around [`tokio::io::Lines`] that implements [`Stream`]. |
| /// |
| /// [`tokio::io::Lines`]: struct@tokio::io::Lines |
| /// [`Stream`]: trait@crate::Stream |
| #[derive(Debug)] |
| #[cfg_attr(docsrs, doc(cfg(feature = "io-util")))] |
| pub struct LinesStream<R> { |
| #[pin] |
| inner: Lines<R>, |
| } |
| } |
| |
| impl<R> LinesStream<R> { |
| /// Create a new `LinesStream`. |
| pub fn new(lines: Lines<R>) -> Self { |
| Self { inner: lines } |
| } |
| |
| /// Get back the inner `Lines`. |
| pub fn into_inner(self) -> Lines<R> { |
| self.inner |
| } |
| |
| /// Obtain a pinned reference to the inner `Lines<R>`. |
| #[allow(clippy::wrong_self_convention)] // https://github.com/rust-lang/rust-clippy/issues/4546 |
| pub fn as_pin_mut(self: Pin<&mut Self>) -> Pin<&mut Lines<R>> { |
| self.project().inner |
| } |
| } |
| |
| impl<R: AsyncBufRead> Stream for LinesStream<R> { |
| type Item = io::Result<String>; |
| |
| fn poll_next(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Option<Self::Item>> { |
| self.project() |
| .inner |
| .poll_next_line(cx) |
| .map(Result::transpose) |
| } |
| } |
| |
| impl<R> AsRef<Lines<R>> for LinesStream<R> { |
| fn as_ref(&self) -> &Lines<R> { |
| &self.inner |
| } |
| } |
| |
| impl<R> AsMut<Lines<R>> for LinesStream<R> { |
| fn as_mut(&mut self) -> &mut Lines<R> { |
| &mut self.inner |
| } |
| } |