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Implement PeekingNext transitively over mutable references. #643

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Merged
bors merged 1 commit into from
Jun 15, 2023
Merged

Implement PeekingNext transitively over mutable references. #643

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13 changes: 12 additions & 1 deletion src/peeking_take_while.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -16,7 +16,18 @@ pub trait PeekingNext : Iterator {
/// if `accept` returns true, return it as the next element,
/// else None.
fn peeking_next<F>(&mut self, accept: F) -> Option<Self::Item>
where F: FnOnce(&Self::Item) -> bool;
where Self: Sized,
F: FnOnce(&Self::Item) -> bool;
}

impl<'a, I> PeekingNext for &'a mut I
where I: PeekingNext,
{
fn peeking_next<F>(&mut self, accept: F) -> Option<Self::Item>
where F: FnOnce(&Self::Item) -> bool
{
(*self).peeking_next(accept)
}
}

impl<I> PeekingNext for Peekable<I>
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