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stream: impl FromIterator for StreamMap (#4052)

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Nylonicious 2021-08-24 13:21:02 +02:00 committed by GitHub
parent 2bc9a42d2b
commit 84f6845bf2
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1 changed files with 17 additions and 0 deletions
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17
tokio-stream/src/stream_map.rs
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@ -568,6 +568,23 @@ where
} }
} }
impl<K, V> std::iter::FromIterator<(K, V)> for StreamMap<K, V>
where
K: Hash + Eq,
{
fn from_iter<T: IntoIterator<Item = (K, V)>>(iter: T) -> Self {
let iterator = iter.into_iter();
let (lower_bound, _) = iterator.size_hint();
let mut stream_map = Self::with_capacity(lower_bound);
for (key, value) in iterator {
stream_map.insert(key, value);
}
stream_map
}
}
mod rand { mod rand {
use std::cell::Cell; use std::cell::Cell;