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Add Pin::static_mut.

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This commit is contained in:
Mara Bos 2020-10-12 20:00:56 +02:00
parent 104c0f0194
commit 2c71f682d7
1 changed files with 14 additions and 0 deletions
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14
library/core/src/pin.rs
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@ -795,6 +795,20 @@ impl<T: ?Sized> Pin<&'static T> {
}
}
impl<T: ?Sized> Pin<&'static T> {
/// Get a pinned mutable reference from a static mutable reference.
///
/// This is safe, because the `'static` lifetime guarantees the data will
/// never be moved.
#[unstable(feature = "pin_static_ref", issue = "none")]
#[rustc_const_unstable(feature = "const_pin", issue = "76654")]
pub const fn static_mut(r: &'static mut T) -> Pin<&'static mut T> {
// SAFETY: The 'static lifetime guarantees the data will not be
// moved/invalidated until it gets dropped (which is never).
unsafe { Pin::new_unchecked(r) }
}
}
#[stable(feature = "pin", since = "1.33.0")]
impl<P: Deref> Deref for Pin<P> {
type Target = P::Target;