async_std/collections/btree_set/
extend.rs

1use std::collections::BTreeSet;
2use std::pin::Pin;
3
4use crate::prelude::*;
5use crate::stream::{self, IntoStream};
6
7impl<T: Ord> stream::Extend<T> for BTreeSet<T> {
8    fn extend<'a, S: IntoStream<Item = T> + 'a>(
9        &'a mut self,
10        stream: S,
11    ) -> Pin<Box<dyn Future<Output = ()> + 'a>> {
12        Box::pin(stream.into_stream().for_each(move |item| {
13            self.insert(item);
14        }))
15    }
16}