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Specialize PeekNth::fold #824

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merged 1 commit into from
Dec 15, 2023
Merged

Specialize PeekNth::fold #824

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8 changes: 8 additions & 0 deletions src/peek_nth.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -152,6 +152,14 @@ where
fn size_hint(&self) -> (usize, Option<usize>) {
size_hint::add_scalar(self.iter.size_hint(), self.buf.len())
}

fn fold<B, F>(self, mut init: B, mut f: F) -> B
where
F: FnMut(B, Self::Item) -> B,
{
init = self.buf.into_iter().fold(init, &mut f);
self.iter.fold(init, f)
}
}

impl<I> ExactSizeIterator for PeekNth<I> where I: ExactSizeIterator {}
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