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}