Function futures::stream::iter

pub fn iter<I, T, E>(i: I) -> IterStream<I> where I: Iterator<Item=Result<T, E>>

Converts an Iterator into a Stream which is always ready to yield the next value.

Iterators in Rust don't express the ability to block, so this adapter simply always calls iter.next() and returns that. Additionally, the error type is generic here as it will never be returned, instead the type of the iterator will always be returned upwards as a successful value.