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use core::marker;
use {Async, Poll};
use stream::Stream;
#[derive(Debug)]
#[must_use = "streams do nothing unless polled"]
pub struct IterOk<I, E> {
iter: I,
_marker: marker::PhantomData<fn() -> E>,
}
pub fn iter_ok<I, E>(i: I) -> IterOk<I::IntoIter, E>
where I: IntoIterator,
{
IterOk {
iter: i.into_iter(),
_marker: marker::PhantomData,
}
}
impl<I, E> Stream for IterOk<I, E>
where I: Iterator,
{
type Item = I::Item;
type Error = E;
fn poll(&mut self) -> Poll<Option<I::Item>, E> {
Ok(Async::Ready(self.iter.next()))
}
}