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Add Pinned type for opting out of Unpin on stable

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This commit is contained in:
Taylor Cramer 2018-05-22 17:10:14 -07:00
parent a44abfdc29
commit 640f6f0749
1 changed files with 10 additions and 0 deletions
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10
src/libcore/marker.rs
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@ -607,6 +607,16 @@ unsafe impl<'a, T: ?Sized> Freeze for &'a mut T {}
#[unstable(feature = "pin", issue = "49150")]
pub auto trait Unpin {}
/// A type which does not implement `Unpin`.
///
/// If a type contains a `Pinned`, it will not implement `Unpin` by default.
#[unstable(feature = "pin", issue = "49150")]
#[derive(Debug, Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Hash)]
pub struct Pinned;
#[unstable(feature = "pin", issue = "49150")]
impl !Unpin for Pinned {}
/// Implementations of `Copy` for primitive types.
///
/// Implementations that cannot be described in Rust