Struct `Iter`

struct Iter<'a, T> { ... }

A blocking iterator over messages in a channel.

Each call to next blocks waiting for the next message and then returns it. However, if the channel becomes empty and disconnected, it returns None without blocking.

Examples

use std::thread;
use crossbeam_channel::unbounded;

let (s, r) = unbounded();

thread::spawn(move || {
    s.send(1).unwrap();
    s.send(2).unwrap();
    s.send(3).unwrap();
    drop(s); // Disconnect the channel.
});

// Collect all messages from the channel.
// Note that the call to `collect` blocks until the sender is dropped.
let v: Vec<_> = r.iter().collect();

assert_eq!(v, [1, 2, 3]);

Implementations

`impl<'a, T> Freeze for Iter<'a, T>`

`impl<'a, T> RefUnwindSafe for Iter<'a, T>`

`impl<'a, T> Send for Iter<'a, T>`

`impl<'a, T> Sync for Iter<'a, T>`

`impl<'a, T> Unpin for Iter<'a, T>`

`impl<'a, T> UnsafeUnpin for Iter<'a, T>`

`impl<'a, T> UnwindSafe for Iter<'a, T>`

`impl<I> IntoIterator for Iter<'a, T>`

fn into_iter(self: Self) -> I

`impl<T> Any for Iter<'a, T>`

fn type_id(self: &Self) -> TypeId

`impl<T> Borrow for Iter<'a, T>`

fn borrow(self: &Self) -> &T

`impl<T> BorrowMut for Iter<'a, T>`

fn borrow_mut(self: &mut Self) -> &mut T

`impl<T> Debug for Iter<'_, T>`

fn fmt(self: &Self, f: &mut Formatter<'_>) -> Result

`impl<T> From for Iter<'a, T>`

fn from(t: T) -> T: Returns the argument unchanged.

`impl<T> FusedIterator for Iter<'_, T>`

`impl<T> Iterator for Iter<'_, T>`

fn next(self: &mut Self) -> Option<<Self as >::Item>

`impl<T, U> Into for Iter<'a, T>`

fn into(self: Self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of [From]<T> for U chooses to do.

`impl<T, U> TryFrom for Iter<'a, T>`

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

`impl<T, U> TryInto for Iter<'a, T>`

fn try_into(self: Self) -> Result<U, <U as TryFrom<T>>::Error>