async_std/vec/
extend.rs

1use std::pin::Pin;
2
3use crate::prelude::*;
4use crate::stream::{self, IntoStream};
5
6impl<T> 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>> {
11        let stream = stream.into_stream();
12
13        self.reserve(stream.size_hint().0);
14
15        Box::pin(stream.for_each(move |item| self.push(item)))
16    }
17}