Struct stream_map_any::StreamMapAny

pub struct StreamMapAny<K> { /* fields omitted */ }

Combines streams with different output types into one.

Methods

impl<K> StreamMapAny<K>

pub const fn new() -> Self

pub fn insert<S>(&mut self, key: K, stream: S) where
    S: Stream + Unpin + 'static,
    S::Item: Any,
    K: Eq, 

Insert a new stream into the map with a given key.

If that key is already in use by another stream, that stream will get dropped.

Examples

use futures::stream;
use stream_map_any::StreamMapAny;

let mut map = StreamMapAny::new();

map.insert("foo", stream::iter(vec![1]));

pub fn remove<Q>(&mut self, k: &Q) where
    K: Borrow<Q>,
    Q: Eq, 

Remove a stream from the map with a given key.

The stream will get dropped.

Examples

use futures::stream;
use stream_map_any::StreamMapAny;

let mut map = StreamMapAny::new();

map.insert(1, stream::iter(vec![1]));
assert_eq!(map.contains_key(&1), true);

map.remove(&1);
assert_eq!(map.contains_key(&1), false);

pub fn contains_key<Q>(&self, k: &Q) -> bool where
    K: Borrow<Q>,
    Q: Eq, 

Returns true if the map contains a stream for the specified key.

Examples

use futures::stream;
use stream_map_any::StreamMapAny;

let mut map = StreamMapAny::new();

map.insert(1, stream::iter(vec![1]));
assert_eq!(map.contains_key(&1), true);
assert_eq!(map.contains_key(&2), false);

Trait Implementations

impl<K> Stream for StreamMapAny<K> where
    K: Unpin + Clone, 

type Item = (K, StreamMapAnyVariant)

Values yielded by the stream.

fn poll_next(self: Pin<&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 stream is exhausted.

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

Returns the bounds on the remaining length of the stream.