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make IterMut Send/Sync again

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This commit is contained in:
Ralf Jung 2020-09-19 11:55:45 +02:00
parent e4c1a3867f
commit 69669cbdb2
1 changed files with 7 additions and 0 deletions
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7
library/alloc/src/collections/vec_deque.rs
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@ -2694,6 +2694,13 @@ pub struct IterMut<'a, T: 'a> {
phantom: PhantomData<&'a mut [T]>,
}
// SAFETY: we do nothing thread-local and there is no interior mutability,
// so the usual structural `Send`/`Sync` apply.
#[stable(feature = "rust1", since = "1.0.0")]
unsafe impl<T: Send> Send for IterMut<'_, T> {}
#[stable(feature = "rust1", since = "1.0.0")]
unsafe impl<T: Sync> Sync for IterMut<'_, T> {}
#[stable(feature = "collection_debug", since = "1.17.0")]
impl<T: fmt::Debug> fmt::Debug for IterMut<'_, T> {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {