async_std/vec/
extend.rs

1use std::pin::Pin;
2
3use crate::prelude::*;
4use crate::stream::{self, IntoStream};
5
6impl<T: Send> stream::Extend<T> for Vec<T> {
7    fn extend<'a, S: IntoStream<Item = T> + 'a>(
8        &'a mut self,
9        stream: S,
10    ) -> Pin<Box<dyn Future<Output = ()> + 'a + Send>>
11    where
12        <S as IntoStream>::IntoStream: Send,
13    {
14        let stream = stream.into_stream();
15
16        self.reserve(stream.size_hint().0);
17
18        Box::pin(stream.for_each(move |item| self.push(item)))
19    }
20}