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//! Use streams with `async` / `await`.
mod next;
pub use self::next::Next;
use futures::Stream;
/// An extension trait which adds utility methods to `Stream` types.
pub trait StreamExt: Stream {
/// Creates a future that resolves to the next item in the stream.
///
/// # Examples
///
/// ```edition2018
/// #![feature(async_await)]
/// tokio::run_async(async {
/// // The extension trait can also be imported with
/// // `use tokio::prelude::*`.
/// use tokio::prelude::{stream, StreamAsyncExt};
///
/// let mut stream = stream::iter_ok::<_, ()>(1..3);
///
/// assert_eq!(stream.next().await, Some(Ok(1)));
/// assert_eq!(stream.next().await, Some(Ok(2)));
/// assert_eq!(stream.next().await, Some(Ok(3)));
/// assert_eq!(stream.next().await, None);
/// });
/// ```
fn next(&mut self) -> Next<'_, Self>
where
Self: Sized + Unpin,
{
Next::new(self)
}
}
impl<T: Stream> StreamExt for T {}
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