Trait LendingStream

pub trait LendingStream {
    type Item<'a>
       where Self: 'a;

    // Required method
    fn poll_next(
        &mut self,
        cx: &mut Context<'_>,
    ) -> Poll<Option<Self::Item<'_>>>;

    // Provided methods
    fn size_hint(&self) -> (usize, Option<usize>) { ... }
    fn next(&mut self) -> Next<'_, Self> 
       where Self: Unpin { ... }
}

An interface for dealing with iterators which borrow from Self

Required Associated Types

type Item<'a> where Self: 'a

The type of the elements being iterated over.

Required Methods

fn poll_next(&mut self, cx: &mut Context<'_>) -> Poll<Option<Self::Item<'_>>>

Attempt to pull out the next value of this stream, registering the current task for wakeup if the value is not yet available, and returning None if the async iterator is exhausted.

Provided Methods

fn size_hint(&self) -> (usize, Option<usize>)

Returns the bounds on the remaining length of the Stream.

fn next(&mut self) -> Next<'_, Self>

where Self: Unpin,

Retrieves the next item in the stream.

Returns None when iteration is finished. Stream implementations may choose to or not to resume iteration after that.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors

impl<I: Stream + Unpin> LendingStream for Lend<I>

type Item<'a> = (&'a I, <I as Stream>::Item) where Self: 'a

impl<I: Stream + Unpin> LendingStream for LendMut<I>

type Item<'a> = (&'a mut I, <I as Stream>::Item) where Self: 'a