1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
|
use async_fn_stream::fn_stream;
use futures_util::{pin_mut, Stream, StreamExt};
fn build_stream() -> impl Stream<Item = i32> {
fn_stream(|emitter| async move {
for i in 0..3 {
// yield elements from stream via `collector`
emitter.emit(i).await;
}
})
}
async fn example() {
let stream = build_stream();
pin_mut!(stream);
let mut numbers = Vec::new();
while let Some(number) = stream.next().await {
print!("{} ", number);
numbers.push(number);
}
println!();
assert_eq!(numbers, vec![0, 1, 2]);
}
pub fn main() {
futures_executor::block_on(example());
}
|
